"use strict";

// TODO: campaign messed up who is who after battle
// TODO: retreat with 0 CU after battle

exports.scenarios = [
	"Historical"
];

exports.roles = [
	"American",
	"British",
];

const CARDS = require('./cards');
const DATA = require('./data');
const SPACES = DATA.SPACES;
const COLONIES = DATA.COLONIES;
const GENERALS = DATA.GENERALS;
const BLOCKADE = DATA.BLOCKADE;
const PATH_INDEX = DATA.PATH_INDEX;
const PATH_NAME = DATA.PATH_NAME;
const PATH_TYPE = DATA.PATH_TYPE;

const BRITISH = 'British';
const AMERICAN = 'American';
const FRENCH = 'French';

const BRITISH_GENERALS = [ "Burgoyne", "Carleton", "Clinton", "Cornwallis", "Howe" ];
const AMERICAN_GENERALS = [ "Arnold", "Gates", "Greene", "Lafayette", "Lee", "Lincoln", "Washington", "Rochambeau" ];
const WASHINGTON = "Washington";
const ROCHAMBEAU = "Rochambeau";
const ARNOLD = "Arnold";

const CAPTURED_GENERALS = "Captured Generals";
const CONTINENTAL_CONGRESS_DISPERSED = "Continental Congress Dispersed";
const BRITISH_REINFORCEMENTS = "British Leader Reinforcements";
const AMERICAN_REINFORCEMENTS = "American Leader Reinforcements";
const FRENCH_REINFORCEMENTS = "French Reinforcements";
const TURN_TRACK = {
	1775: "Game Turn 1775",
	1776: "Game Turn 1776",
	1777: "Game Turn 1777",
	1778: "Game Turn 1778",
	1779: "Game Turn 1779",
	1780: "Game Turn 1780",
	1781: "Game Turn 1781",
	1782: "Game Turn 1782",
	1783: "Game Turn 1783",
};

const FALMOUTH_QUEBEC = "Falmouth/Quebec";

const THE_13_COLONIES = [ 'NH', 'NY', 'MA', 'CT', 'RI', 'PA', 'NJ', 'MD', 'DE', 'VA', 'NC', 'SC', 'GA' ];
const SOUTH_OF_WINTER_ATTRITION_LINE = [ 'NC', 'SC', 'GA' ];

const CAMPAIGN_CARDS = [ 67, 68, 69, 70 ];
const DECLARATION_OF_INDEPENDENCE = 99;
const BARON_VON_STEUBEN = 86;
const WAR_ENDS_1779 = 71;
const BENJAMIN_FRANKLIN = 101;

const ENEMY = { "American": BRITISH, "British": AMERICAN };

const default_options = {};

let states = {};
let events = {};

let game;
let view;

function random(n) {
	return (game.seed = game.seed * 200105 % 34359738337) % n
}

function logbr() {
	if (game.log.length > 0 && game.log[game.log.length-1] !== "")
		game.log.push("");
}

function log(s) {
	game.log.push(s);
}

function logp(s) {
	game.log.push(game.active[0] + " " + s);
}

function object_copy(original) {
	if (Array.isArray(original)) {
		let n = original.length
		let copy = new Array(n)
		for (let i = 0; i < n; ++i) {
			let v = original[i]
			if (typeof v === "object" && v !== null)
				copy[i] = object_copy(v)
			else
				copy[i] = v
		}
		return copy
	} else {
		let copy = {}
		for (let i in original) {
			let v = original[i]
			if (typeof v === "object" && v !== null)
				copy[i] = object_copy(v)
			else
				copy[i] = v
		}
		return copy
	}
}

function clear_undo() {
	if (game.undo) {
		game.undo.length = 0
	}
}

function push_undo() {
	if (game.undo) {
		let copy = {}
		for (let k in game) {
			let v = game[k]
			if (k === "undo")
				continue
			else if (k === "log")
				v = v.length
			else if (typeof v === "object" && v !== null)
				v = object_copy(v)
			copy[k] = v
		}
		game.undo.push(copy)
	}
}

function pop_undo() {
	if (game.undo) {
		let save_log = game.log
		let save_undo = game.undo
		game = save_undo.pop()
		save_log.length = game.log
		game.log = save_log
		game.undo = save_undo
	}
}

function remove_from_array(array, item) {
	let i = array.indexOf(item);
	if (i >= 0)
		array.splice(i, 1);
}

function setup_game(seed) {
	game = {
		seed: seed,
		year: 1775,
		congress: "Philadelphia",
		french_alliance: 0,
		french_alliance_triggered: false,
		european_war: false,
		french_navy: FRENCH_REINFORCEMENTS,
		regulars: true,
		war_ends: 0,
		played_british_reinforcements: 0,
		played_american_reinforcements: [],

		pc: {},
		generals: {},
		moved: {},
		cu: [],
		control: {},

		deck: create_deck(),
		discard: [],
		reshuffle: false,
		a_hand: [],
		b_hand: [],
		a_queue: 0,
		b_queue: 0,

		log: [],
		undo: [],

		prompt: null,
		actions: [],
	}

	function spawn_unit(owner, location, pc, cu, name) {
		if (pc)
			game.pc[location] = owner;
		if (name) {
			game.generals[name] = {
				location: location,
			}
		}
		if (cu > 0) {
			game.cu.push({
				owner: owner,
				location: location,
				count: cu,
				moved: 0,
			});
		}
	}

	function british(place, pc, cu, ld) { spawn_unit(BRITISH, place, pc, cu, ld); }
	function american(place, pc, cu, ld) { spawn_unit(AMERICAN, place, pc, cu, ld); }
	function french(place, pc, cu, ld) { spawn_unit(FRENCH, place, pc, cu, ld); }

	british("Quebec", true, 2, "Carleton");
	british("Montreal", true);
	british("Fort Detroit", true, 1);
	british("Boston", true, 5, "Howe");
	british("Norfolk", true);
	british("Gilbert Town", true);
	british("Wilmington NC", true);
	british("Ninety Six", true);

	american("Lexington Concord", true, 5, "Washington");
	american("Newport", false, 2, "Greene");
	american("Charleston", true, 2);
	american("Philadelphia", true);

	british(BRITISH_REINFORCEMENTS, false, 0, "Burgoyne");
	british(BRITISH_REINFORCEMENTS, false, 0, "Clinton");
	british(BRITISH_REINFORCEMENTS, false, 0, "Cornwallis");

	american(AMERICAN_REINFORCEMENTS, false, 0, "Arnold");
	american(AMERICAN_REINFORCEMENTS, false, 0, "Lincoln");
	american(AMERICAN_REINFORCEMENTS, false, 0, "Gates");
	american(AMERICAN_REINFORCEMENTS, false, 0, "Lee");
	american(AMERICAN_REINFORCEMENTS, false, 0, "Lafayette");

	french(FRENCH_REINFORCEMENTS, false, 5, "Rochambeau");

	goto_committees_of_correspondence();
}

/* GAME STATE */

function create_deck() {
	let deck = [];
	for (let i = 1; i <= 110; ++i) {
		// No DoI or Baron von Steuben first year.
		if (i == DECLARATION_OF_INDEPENDENCE || i == BARON_VON_STEUBEN)
			continue;
		deck.push(i);
	}
	return deck;
}

function reshuffle_deck() {
	log("Reshuffled the deck.");
	game.reshuffle = false;
	game.deck = game.deck.concat(game.discard);
	game.discard = [];
}

function roll_d6() {
	return random(6) + 1;
}

function deal_card() {
	if (game.deck.length == 0)
		reshuffle_deck();
	let i = random(game.deck.length);
	let c = game.deck[i];
	game.deck.splice(i, 1);
	return c;
}

function last_discard() {
	if (game.discard.length > 0)
		return game.discard[game.discard.length-1];
	return null;
}

function active_hand() {
	return (game.active == AMERICAN) ? game.a_hand : game.b_hand;
}

function play_card(c, reason) {
	if (reason)
		log(game.active[0] + " played #" + c + " " + reason);
	else
		log(game.active[0] + " played #" + c);
	if (CARDS[c].reshuffle == 'if_played')
		game.reshuffle = true;
	remove_from_array(active_hand(), c);
	game.last_played = c;
	if (!CARDS[c].once)
		game.discard.push(c);
	else
		log("Removed card " + c + ".");
}

function discard_card_from_hand(hand, c) {
	remove_from_array(hand, c);
	game.discard.push(c);
	if (CARDS[c].reshuffle == 'if_discarded')
		game.reshuffle = true;
	logp("discarded #" + c);
}

function discard_card(c, reason) {
	game.last_played = c;
	discard_card_from_hand(active_hand(), c);
	if (reason)
		logp("discarded #" + c + " " + reason);
	else
		logp("discarded #" + c);
}

function can_exchange_for_discard(c) {
	if (game.did_discard_event) {
		if (game.active == BRITISH)
			return true;
		return CARDS[c].count > 1;
	}
	return false;
}

function can_play_event(c) {
	let card = CARDS[c];
	switch (card.when) {
	case 'before_french_alliance': return !game.french_alliance_triggered;
	case 'after_french_alliance': return game.french_alliance_triggered;
	case 'european_war_in_effect': return game.european_war;
	}
	switch (card.event) {
	case 'john_glovers_marblehead_regiment': return has_general_on_map();
	}
	return true;
}

function can_play_reinforcements() {
	if (game.active == BRITISH) {
		if (game.played_british_reinforcements == 0) {
			let n = count_british_cu(BRITISH_REINFORCEMENTS);
			for (let g of BRITISH_GENERALS)
				if (game.generals[g].location == BRITISH_REINFORCEMENTS)
					++n;
			return n > 0;
		}
		return false;
	}
	if (game.active == AMERICAN)
		return game.played_american_reinforcements.length < 2;
	return false;
}

function is_port(where) {
	return SPACES[where].port;
}

function is_non_blockaded_port(where) {
	if (SPACES[where].port && BLOCKADE[where] != game.french_navy)
		return true;
	return false;
}

function is_fortified_port(where) {
	return SPACES[where].type == 'fortified-port';
}

function is_continental_congress_dispersed() {
	return game.congress == CONTINENTAL_CONGRESS_DISPERSED;
}

function is_winter_quarter_space(where) {
	let colony = SPACES[where].colony;
	if (colony == 'GA' || colony == 'SC' || colony == 'NC')
		return true; // south of winter attrition line
	let type = SPACES[where].type;
	if (type == 'winter-quarters' || type == 'fortified-port')
		return true;
	return false;
}

function allowed_to_place_american_pc() {
	if (is_continental_congress_dispersed())
		return false;
	if (game.pennsylvania_and_new_jersey_line_mutinies)
		return false;
	return true;
}

function is_british_militia(space) {
	return game.control[SPACES[space].colony] == BRITISH;
}

function is_american_militia(space) {
	return game.control[SPACES[space].colony] == AMERICAN;
}

function is_american_winter_offensive() {
	if (game.who == WASHINGTON && game.a_hand.length == 0)
		return true;
	return false;
}

/* PC */

function has_no_pc(space) {
	return game.pc[space] != BRITISH && game.pc[space] != AMERICAN;
}

function has_british_pc(space) {
	return game.pc[space] == BRITISH;
}

function has_american_pc(space) {
	return game.pc[space] == AMERICAN;
}

function has_enemy_pc(space) {
	if (game.active == BRITISH)
		return has_american_pc(space);
	else
		return has_british_pc(space);
}

function is_adjacent_to_british_pc(a) {
	for (let b of SPACES[a].exits)
		if (has_british_pc(b))
			return true;
	if (SPACES[a].port) {
		for (let b in SPACES) {
			if (SPACES[b].port)
				if (has_british_pc(b))
					return true;
		}
	}
	return false;
}

function is_adjacent_to_american_pc(a) {
	for (let b of SPACES[a].exits)
		if (has_american_pc(b))
			return true;
	return false;
}

function place_british_pc(space) {
	logp("placed PC in " + space);
	if (game.british_pc_space_list)
		remove_from_array(game.british_pc_space_list, space);
	game.pc[space] = BRITISH;
}

function place_american_pc(space) {
	logp("placed PC in " + space);
	game.pc[space] = AMERICAN;
}

function remove_pc(space) {
	if (game.active == BRITISH)
		logp("removed PC in " + space);
	else
		logp("removed PC in " + space);
	game.pc[space] = undefined;
}

function flip_pc(space) {
	if (game.active == BRITISH)
		logp("flipped PC in " + space);
	else
		logp("flipped PC in " + space);
	game.pc[space] = ENEMY[game.pc[space]];
}

function update_colony_control() {
	for (let c in COLONIES) {
		let control = 0;
		for (let space of COLONIES[c]) {
			if (game.pc[space] == BRITISH)
				--control;
			else if (game.pc[space] == AMERICAN)
				++control;
		}
		if (control < 0)
			game.control[c] = BRITISH;
		else if (control > 0)
			game.control[c] = AMERICAN;
		else
			game.control[c] = undefined;
	}
}

/* CU */

function find_cu(owner, space) {
	for (let i = 0; i < game.cu.length; ++i) {
		let cu = game.cu[i];
		if (cu.location == space && cu.owner == owner)
			return cu;
	}
	return null;
}

function find_british_cu(space) {
	return find_cu(BRITISH, space);
}

function find_american_cu(space) {
	return find_cu(AMERICAN, space);
}

function find_french_cu(space) {
	return find_cu(FRENCH, space);
}

function has_british_cu(space) {
	return find_british_cu(space) != null;
}

function has_no_british_cu(space) {
	return !has_british_cu(space);
}

function has_american_or_french_cu(space) {
	return find_american_cu(space) != null || find_french_cu(space) != null;
}

function has_american_cu(space) {
	return find_american_cu(space) != null;
}

function has_french_cu(space) {
	return find_french_cu(space) != null;
}

function has_enemy_cu(where) {
	if (game.active == BRITISH)
		return has_american_or_french_cu(where);
	else
		return has_british_cu(where);
}

function count_cu(owner, space) {
	let cu = find_cu(owner, space);
	return cu ? cu.count : 0;
}

function count_british_cu(where) {
	let cu = find_british_cu(where);
	return cu ? cu.count : 0;
}

function count_american_cu(where) {
	let cu = find_american_cu(where);
	return cu ? cu.count : 0;
}

function count_french_cu(where) {
	let cu = find_french_cu(where);
	return cu ? cu.count : 0;
}

function count_unmoved_british_cu(where) {
	let cu = find_british_cu(where);
	return cu ? cu.count - cu.moved : 0;
}

function count_unmoved_american_cu(where) {
	let cu = find_american_cu(where);
	return cu ? cu.count - cu.moved : 0;
}

function count_unmoved_french_cu(where) {
	let cu = find_french_cu(where);
	return cu ? cu.count - cu.moved : 0;
}

function mark_moved_cu(owner, space, moved) {
	if (moved > 0)
		find_cu(owner, space).moved += moved;
}

function count_american_and_french_cu(where) {
	return count_american_cu(where) + count_french_cu(where);
}

function count_enemy_cu(where) {
	if (game.active == BRITISH)
		return count_american_and_french_cu(where);
	else
		return count_british_cu(where);
}

function spawn_cu(owner, where, count) {
	game.cu.push({owner:owner, location:where, count:count, moved:0});
}

function remove_cu(owner, where, count) {
	if (count == 0)
		return;
	let cu = find_cu(owner, where);
	if (count >= cu.count) {
		let i = game.cu.indexOf(cu);
		remove_from_array(game.cu, cu);
	} else {
		cu.count -= count;
	}
}

function place_cu(owner, where, count) {
	let cu = find_cu(owner, where);
	if (!cu)
		spawn_cu(owner, where, count);
	else
		cu.count += count;
}

function place_british_cu(where, count) {
	place_cu(BRITISH, where, count);
}

function place_american_cu(where, count) {
	place_cu(AMERICAN, where, count);
}

function place_french_cu(where, count) {
	place_cu(FRENCH, where, count);
}

function move_cu(owner, from, to, count) {
	if (count == 0)
		return;
	let from_cu = find_cu(owner, from);
	if (count < from_cu.count) {
		from_cu.count -= count;
		place_cu(owner, to, count);
	} else {
		let to_cu = find_cu(owner, to);
		if (to_cu) {
			remove_cu(owner, from, from_cu.count);
			to_cu.count += count;
		} else {
			from_cu.location = to;
		}
	}
}

function move_british_cu(from, to, count) {
	move_cu(BRITISH, from, to, count);
}

/* GENERALS */

function is_general_on_map(g) {
	switch (game.generals[g].location) {
	case null: /* killed */
	case CAPTURED_GENERALS:
	case BRITISH_REINFORCEMENTS:
	case AMERICAN_REINFORCEMENTS:
	case FRENCH_REINFORCEMENTS:
		return false;
	}
	return true;
}

function find_british_general(where) {
	for (let general of BRITISH_GENERALS)
		if (game.generals[general].location == where)
			return general;
	return null;
}

function find_american_or_french_general(where) {
	for (let general of AMERICAN_GENERALS)
		if (game.generals[general].location == where)
			return general;
	return null;
}

function has_british_general(where) {
	return find_british_general(where) != null;
}

function has_american_or_french_general(where) {
	return find_american_or_french_general(where) != null;
}

function has_enemy_general(where) {
	if (game.active == BRITISH)
		return has_american_or_french_general(where);
	else
		return has_british_general(where);
}

function count_friendly_generals(where) {
	let list;
	if (game.active == BRITISH)
		list = BRITISH_GENERALS;
	else
		list = AMERICAN_GENERALS;
	let count = 0;
	for (let g of list)
		if (location_of_general(g) == where)
			++count;
	return count;
}

function has_general_on_map() {
	if (game.active == BRITISH)
		return has_british_general_on_map();
	else
		return has_american_general_on_map();
}

function has_british_general_on_map() {
	for (let g of BRITISH_GENERALS)
		if (is_general_on_map(g))
			return true;
	return false;
}

function has_american_general_on_map() {
	for (let g of AMERICAN_GENERALS)
		if (is_general_on_map(g))
			return true;
	return false;
}

function can_activate_general(c) {
	if (game.active == BRITISH)
		return can_activate_british_general(c);
	else
		return can_activate_american_general(c);
}

function can_activate_british_general(c) {
	let ops = CARDS[c].count + game.b_queue;
	for (let g of BRITISH_GENERALS)
		if (is_general_on_map(g) && GENERALS[g].strategy <= ops)
			return true;
	return false;
}

function can_activate_american_general(c) {
	let ops = CARDS[c].count + game.a_queue;
	for (let g of AMERICAN_GENERALS)
		if (is_general_on_map(g) && GENERALS[g].strategy <= ops)
			return true;
	return false;
}

function move_general(who, where) {
	game.generals[who].location = where;
}

function capture_washington() {
	game.generals[WASHINGTON].location = null;

	if (!game.french_alliance_triggered) {
		game.french_alliance -= 3;
		if (game.french_alliance < 0)
			game.french_alliance = 0;
	}

	goto_george_washington_captured();
}

function capture_british_general(where) {
	let g = find_british_general(where);
	log(g + " was captured!");
	move_general(g, CAPTURED_GENERALS);
}

function capture_american_or_french_general(where) {
	let g = find_american_or_french_general(where);
	log(g + " was captured!");
	if (g == WASHINGTON)
		capture_washington();
	else
		move_general(g, CAPTURED_GENERALS);
}

function capture_enemy_general(where) {
	if (game.active == BRITISH)
		capture_american_or_french_general(where);
	else
		capture_british_general(where);
}

function remove_benedict_arnold() {
	if (game.generals[ARNOLD].location) {
		log("Removed Arnold from the game!");
		game.generals[ARNOLD].location = null;
	}
}

/* ARMIES */

function has_british_army(where) {
	return has_british_general(where) && has_british_cu(where);
}

function has_american_army(where) {
	return has_american_or_french_general(where) && has_american_or_french_cu(where);
}

function has_no_british_playing_piece(where) {
	if (has_british_pc(where))
		return false;
	if (has_british_general(where))
		return false;
	if (has_british_cu(where))
		return false;
	return true;
}

function has_no_american_unit(where) {
	if (has_american_or_french_general(where))
		return false;
	if (has_american_or_french_cu(where))
		return false;
	if (game.congress == where)
		return false;
	return true;
}

function place_british_reinforcements(who, count, where) {
	let already_there = find_british_general(where);
	if (who && already_there) {
		move_general(already_there, BRITISH_REINFORCEMENTS);
	}
	if (who) {
		logp("reinforced " + where + " with " + who);
		move_general(who, where);
	}
	if (count > 0) {
		logp("reinforced " + where + " with " + count + " CU");
		move_british_cu(BRITISH_REINFORCEMENTS, where, count);
	}
}

function place_american_reinforcements(who, count, where) {
	let already_there = find_american_or_french_general(where);
	if (who && already_there) {
		// Never replace Washington
		if (already_there == WASHINGTON)
			who = null;
		else
			move_general(already_there, AMERICAN_REINFORCEMENTS);
	}
	if (who) {
		logp("reinforced " + where + " with " + who);
		move_general(who, where);
	}
	logp("reinforced " + where + " with " + count + " CU");
	place_american_cu(where, count);
}

function place_french_reinforcements(who, where) {
	let already_there = find_american_or_french_general(where);
	if (who && already_there) {
		// Never replace Washington
		if (already_there == WASHINGTON)
			who = null;
		else
			move_general(already_there, AMERICAN_REINFORCEMENTS);
	}
	if (who) {
		logp("reinforced " + where + " with " + who);
		move_general(who, where);
	}
	logp("reinforced " + where + " with the French CU");
	move_cu(FRENCH, FRENCH_REINFORCEMENTS, where, count_french_cu(FRENCH_REINFORCEMENTS));
	move_cu(FRENCH, AMERICAN_REINFORCEMENTS, where, count_french_cu(AMERICAN_REINFORCEMENTS));
}

function location_of_general(g) {
	return game.generals[g].location;
}

function pickup_max_british_cu(where) {
	game.carry_british = count_unmoved_british_cu(where);
	if (game.carry_british > 5)
		game.carry_british = 5;
	game.carry_american = 0;
	game.carry_french = 0;
}

function pickup_max_american_cu(where) {
	game.carry_british = 0;
	game.carry_french = count_unmoved_french_cu(where);
	game.carry_american = count_unmoved_american_cu(where);
	if (game.carry_french > 5)
		game.carry_french = 5;
	if (game.carry_american + game.carry_french > 5)
		game.carry_american = 5 - game.carry_french;
}

function move_army(who, from, to) {
	game.count -= movement_cost(from, to);
	if (game.mobility && has_enemy_cu(to)) {
		game.mobility = false;
		game.count -= 1;
	}
	if (game.carry_british > 0)
		move_cu(BRITISH, from, to, game.carry_british);
	if (game.carry_american > 0)
		move_cu(AMERICAN, from, to, game.carry_american);
	if (game.carry_french > 0)
		move_cu(FRENCH, from, to, game.carry_french);
	move_general(who, to);
}

function intercept_army(who, from, to) {
	if (game.carry_british > 0)
		move_cu(BRITISH, from, to, game.carry_british);
	if (game.carry_american > 0)
		move_cu(AMERICAN, from, to, game.carry_american);
	if (game.carry_french > 0)
		move_cu(FRENCH, from, to, game.carry_french);
	move_general(who, to);
}

function overrun(where) {
	logp("overran CU in " + where);
	let cu;
	if (game.active == BRITISH)
		cu = find_american_cu(where) || find_french_cu(where);
	else
		cu = find_british_cu(where);
	remove_cu(cu.owner, where, 1);
}

function retreat_american_army(from, to) {
	let g = find_american_or_french_general(from);
	if (g)
		move_general(g, to);
	move_cu(AMERICAN, from, to, count_american_cu(from));
	move_cu(FRENCH, from, to, count_french_cu(from));
}

function retreat_british_army(from, to) {
	let g = find_british_general(from);
	if (g)
		move_general(g, to);
	move_cu(BRITISH, from, to, count_british_cu(from));
}

function surrender_american_army(where) {
	let g = find_american_or_french_general(where);
	if (g)
		capture_american_or_french_general(where);
	remove_cu(AMERICAN, where, count_american_cu(where));
	remove_cu(FRENCH, where, count_french_cu(where));
}

function surrender_british_army(where) {
	let g = find_british_general(where);
	if (g)
		capture_british_general(where);
	game.british_losses += count_british_cu(where);
	remove_cu(BRITISH, where, count_british_cu(where));
}

function disperse_continental_congress(where) {
	log("Contintental Congress dispersed!");
	game.congress = CONTINENTAL_CONGRESS_DISPERSED;
	game.congress_was_dispersed = true;
}

/* MOVE GENERATORS */

function gen_action(action, argument) {
	if (!view.actions)
		view.actions = {}
	if (argument != undefined) {
		if (!(action in view.actions))
			view.actions[action] = [ argument ];
		else
			view.actions[action].push(argument);
	} else {
		view.actions[action] = 1;
	}
}

function gen_action_undo() {
	if (!view.actions)
		view.actions = {}
	if (game.undo && game.undo.length > 0)
		view.actions.undo = 1;
	else
		view.actions.undo = 0;
}

function gen_pass() {
	gen_action('pass');
}

function gen_remove_british_pc_from(list_of_colonies) {
	for (let colony of list_of_colonies) {
		for (let space of COLONIES[colony]) {
			if (has_british_pc(space) && has_no_british_cu(space)) {
				gen_action('remove_pc', space);
			}
		}
	}
}

function gen_remove_american_pc() {
	for (let space in SPACES) {
		if (has_american_pc(space) && has_no_american_unit(space)) {
			gen_action('remove_pc', space);
		}
	}
}

function gen_remove_american_pc_from(list_of_colonies) {
	for (let colony of list_of_colonies) {
		for (let space of COLONIES[colony]) {
			if (has_american_pc(space) && has_no_american_unit(space)) {
				gen_action('remove_pc', space);
			}
		}
	}
}

function gen_remove_american_pc_from_non_port(list_of_colonies) {
	for (let colony of list_of_colonies) {
		for (let space of COLONIES[colony]) {
			if (!SPACES[space].port) {
				if (has_american_pc(space) && has_no_american_unit(space)) {
					gen_action('remove_pc', space);
				}
			}
		}
	}
}

function gen_remove_american_pc_within_two_spaces_of_a_british_general() {
	let candidates = {};
	for (let g of BRITISH_GENERALS) {
		let a = game.generals[g].location;
		if (a in SPACES) {
			candidates[a] = true;
			for (let b of SPACES[a].exits) {
				candidates[b] = true;
				for (let c of SPACES[b].exits) {
					candidates[c] = true;
				}
			}
		}
	}
	for (let space in candidates)
		if (has_american_pc(space) && has_no_american_unit(space))
			gen_action('remove_pc', space);
}

function gen_place_american_pc() {
	for (let space in SPACES) {
		if (has_no_pc(space) && has_no_british_playing_piece(space)) {
			gen_action('place_american_pc', space);
		}
	}
}

function gen_place_american_pc_in(list_of_colonies) {
	for (let colony of list_of_colonies) {
		for (let space of COLONIES[colony]) {
			if (has_no_pc(space) && has_no_british_playing_piece(space)) {
				gen_action('place_american_pc', space);
			}
		}
	}
}

/* SETUP PHASE */

function goto_committees_of_correspondence() {
	log(".h2.american Committes of Correspondence");
	logbr();
	game.active = AMERICAN;
	game.state = 'committees_of_correspondence';
	game.coc = THE_13_COLONIES.slice();
}

states.committees_of_correspondence = {
	inactive: "Committees of Correspondence",
	prompt: function (current) {
		view.prompt = "Committees of Correspondence: Place 1 PC marker in each of the 13 colonies. " + game.coc.length + " left.";
		if (game.coc.length > 0)
			gen_place_american_pc_in(game.coc);
		else
			gen_pass();
	},
	place_american_pc: function (space) {
		push_undo();
		let colony = SPACES[space].colony;
		remove_from_array(game.coc, colony);
		place_american_pc(space);
	},
	pass: function () {
		clear_undo();
		goto_for_the_king();
	}
}

function goto_for_the_king() {
	logbr();
	log(".h2.british For the King");
	logbr();
	delete game.coc;
	game.active = BRITISH;
	game.state = 'for_the_king';
	game.count = 3;
	gen_british_pc_ops_start();
}

states.for_the_king = {
	inactive: "For the King",
	prompt: function (current) {
		view.prompt = "For the King: Place 3 PC markers. " + game.count + " left.";
		if (game.count > 0)
			gen_british_pc_ops();
		else
			gen_pass();
	},
	place_british_pc: function (space) {
		push_undo();
		place_british_pc(space);
		--game.count;
	},
	pass: function () {
		clear_undo();
		gen_british_pc_ops_end();
		goto_start_year();
	}
}

/* REINFORCEMENTS AND START OF STRATEGY PHASE */

function automatic_victory() {
	let n_american = 0;
	let n_british = 0;
	for (let space in SPACES) {
		n_american += count_french_cu(space) + count_american_cu(space);
		if (SPACES[space].colony != "CA")
			n_british += count_british_cu(space);
	}
	if (n_american == 0) {
		game.victory = "British Automatic Victory!";
		game.active = "None";
		game.result = BRITISH;
		game.state = 'game_over';
		log(game.victory);
		return true;
	}
	if (n_british == 0) {
		game.victory = "American Automatic Victory!";
		game.active = "None";
		game.result = AMERICAN;
		game.state = 'game_over';
		log(game.victory);
		return true;
	}
	return false;
}

function goto_start_year() {
	logbr();
	log(".h1 Year " + game.year);
	logbr();

	// Prisoner exchange
	for (let g of BRITISH_GENERALS)
		if (game.generals[g].location == CAPTURED_GENERALS)
			move_general(g, BRITISH_REINFORCEMENTS);
	for (let g of AMERICAN_GENERALS)
		if (game.generals[g].location == CAPTURED_GENERALS)
			move_general(g, AMERICAN_REINFORCEMENTS);

	switch (game.year) {
	case 1775: place_british_cu(BRITISH_REINFORCEMENTS, 3); break;
	case 1776: place_british_cu(BRITISH_REINFORCEMENTS, 8); break;
	case 1777: place_british_cu(BRITISH_REINFORCEMENTS, 1); break;
	case 1778: place_british_cu(BRITISH_REINFORCEMENTS, 8); break;
	case 1779: place_british_cu(BRITISH_REINFORCEMENTS, 1); break;
	case 1780: place_british_cu(BRITISH_REINFORCEMENTS, 5); break;
	case 1781: place_british_cu(BRITISH_REINFORCEMENTS, 1); break;
	case 1782: place_british_cu(BRITISH_REINFORCEMENTS, 1); break;
	case 1783: place_british_cu(BRITISH_REINFORCEMENTS, 1); break;
	}

	if (game.year == 1776) {
		game.deck.push(DECLARATION_OF_INDEPENDENCE);
		game.deck.push(BARON_VON_STEUBEN);
	}

	if (game.reshuffle)
		reshuffle_deck();

	game.a_hand = [];
	game.b_hand = [];
	for (let i = 0; i < 7; ++i) {
		game.a_hand.push(deal_card());
		game.b_hand.push(deal_card());
	}

	game.a_queue = 0;
	game.b_queue = 0;
	game.did_discard_event = false;

	// TODO: save the played card numbers instead (rule 6.1B clarification)
	game.played_british_reinforcements = 0;
	game.played_american_reinforcements = [];
	game.active = BRITISH;
	game.state = 'british_declare_first';
}

states.british_declare_first = {
	prompt: function (current) {
		view.prompt = "Declare yourself as the first player by playing a campaign card?";
		gen_pass();
		for (let c of CAMPAIGN_CARDS) {
			if (game.b_hand.includes(c)) {
				gen_action('card_campaign', c);
			}
		}
	},
	card_campaign: function (c) {
		delete game.congress_was_dispersed;
		logp("went first by playing a campaign card");
		game.active = BRITISH;
		goto_campaign(c);
	},
	pass: function () {
		if (game.congress_was_dispersed)
			game.active = BRITISH;
		else
			game.active = AMERICAN;
		game.state = 'choose_first_player';
		delete game.congress_was_dispersed;
	},
}

states.choose_first_player = {
	prompt: function (current) {
		view.prompt = "Choose who will play the first strategy card.";
		gen_action('american_first');
		gen_action('british_first');
	},
	american_first: function (c) {
		logp("went first");
		goto_strategy_phase(AMERICAN);
	},
	british_first: function (c) {
		logp("went first");
		goto_strategy_phase(BRITISH);
	},
}

/* STRATEGY PHASE */

function goto_strategy_phase(new_active) {
	game.active = new_active;
	game.state = 'strategy_phase';
	logbr();
	if (game.active === AMERICAN)
		log(".h2.american American Turn");
	else
		log(".h2.british British Turn");
	logbr();
}

states.strategy_phase = {
	inactive: "strategy phase",
	prompt: function (current) {
		view.prompt = "Play a strategy card.";
		gen_strategy_plays(active_hand());
	},
	card_campaign: function (c) {
		game.did_discard_event = false;
		clear_queue();
		goto_campaign(c);
	},
	card_play_event: function (c) {
		push_undo();
		game.did_discard_event = false;
		clear_queue();
		do_event(c);
	},
	card_discard_event: function (c) {
		push_undo();
		game.did_discard_event = true;
		clear_queue();
		discard_card(c, "PC action");
		game.state = 'discard_event_pc_action';
	},
	card_ops_pc: function (c) {
		push_undo();
		game.did_discard_event = false;
		clear_queue();
		play_card(c, "for PC");
		goto_ops_pc(CARDS[c].count);
	},
	card_ops_reinforcements: function (c) {
		push_undo();
		game.did_discard_event = false;
		clear_queue();
		goto_ops_reinforcements(c);
	},
	card_ops_queue: function (c) {
		game.did_discard_event = false;
		play_card(c, "to queue");
		if (game.active == BRITISH)
			game.b_queue += CARDS[c].count;
		else
			game.a_queue += CARDS[c].count;
		end_strategy_card();
	},
	card_ops_general: function (c) {
		push_undo();
		game.did_discard_event = false;
		goto_ops_general(c);
	},
	exchange_for_discard: function (c) {
		game.did_discard_event = false;
		let d = game.discard.pop();
		discard_card(c);
		active_hand().push(d);
		logp("picked up up #" + d);
	},
}

function end_strategy_card() {
	clear_undo();

	if (automatic_victory())
		return;

	if (game.campaign) {
		if (--game.campaign > 0) {
			game.count = 3; // can activate any general!
			game.state = 'ops_general_who';
			return;
		} else {
			delete game.landing_party;
			delete game.campaign;
		}
	}

	if (!game.french_alliance_triggered && game.french_alliance == 9) {
		log("The French signed an alliance with the Americans!");
		game.french_alliance_triggered = true;
		if (game.french_navy == FRENCH_REINFORCEMENTS) {
			game.save_active = game.active;
			game.active = AMERICAN;
			game.state = 'place_french_navy_trigger';
			return;
		}
	}

	game.moved = {};
	for (let cu of game.cu)
		cu.moved = 0;

	goto_strategy_phase(ENEMY[game.active]);

	let hand = active_hand();
	if (hand.length == 0) {
		game.active = ENEMY[game.active];
		hand = active_hand();
		if (hand.length == 0)
			return goto_winter_attrition_phase();
	}
}

function clear_queue() {
	if (game.active == BRITISH)
		game.b_queue = 0;
	else
		game.a_queue = 0;
}

function gen_strategy_plays(hand) {
	for (let c of hand) {
		let card = CARDS[c];
		switch (card.type) {
		case 'mandatory-event':
			gen_action('card_play_event', c);
			break;
		case 'campaign':
			gen_action('card_campaign', c);
			break;
		case 'ops':
			if (can_exchange_for_discard(c))
				gen_action('exchange_for_discard', c);
			if (can_activate_general(c))
				gen_action('card_ops_general', c);
			gen_action('card_ops_pc', c);
			if (can_play_reinforcements())
				gen_action('card_ops_reinforcements', c);
			if (card.count < 3)
				gen_action('card_ops_queue', c);
			break;
		case 'british-event':
		case 'british-event-or-battle':
			if (game.active == BRITISH)
				if (can_play_event(c))
					gen_action('card_play_event', c);
			gen_action('card_discard_event', c);
			break;
		case 'american-event':
			if (game.active == AMERICAN)
				if (can_play_event(c))
					gen_action('card_play_event', c);
			gen_action('card_discard_event', c);
			break;
		case 'british-battle':
		case 'american-battle':
			gen_action('card_discard_event', c);
			break;
		}
	}
}

/* DISCARD EVENT CARD FOR PC ACTION */

states.discard_event_pc_action = {
	prompt: function (current) {
		view.prompt = "Place, flip, or remove PC marker.";
		gen_pass();
		if (game.active == BRITISH)
			gen_british_discard_event_pc_action();
		else
			gen_american_discard_event_pc_action();
	},
	place_british_pc: function (space) {
		place_british_pc(space);
		end_strategy_card();
	},
	place_american_pc: function (space) {
		place_american_pc(space);
		end_strategy_card();
	},
	remove_pc: function (space) {
		remove_pc(space);
		end_strategy_card();
	},
	flip_pc: function (space) {
		flip_pc(space);
		end_strategy_card();
	},
	pass: function () {
		end_strategy_card();
	},
}

function gen_british_discard_event_pc_action() {
	for (let space in SPACES) {
		if (is_adjacent_to_british_pc(space)) {
			if (has_no_pc(space) && has_no_american_unit(space))
				gen_action('place_british_pc', space);
			else if (has_american_pc(space) && has_british_army(space))
				gen_action('flip_pc', space);
			else if (has_american_pc(space) && has_no_american_unit(space))
				gen_action('remove_pc', space);
		}
	}
}

function gen_american_discard_event_pc_action() {
	for (let space in SPACES) {
		if (is_adjacent_to_american_pc(space)) {
			if (has_no_pc(space) && has_no_british_cu(space)) {
				if (allowed_to_place_american_pc())
					gen_action('place_american_pc', space);
			}
			else if (has_british_pc(space) && has_american_or_french_general(space)) {
				gen_action('flip_pc', space);
			}
			else if (has_british_pc(space) && has_no_british_cu(space)) {
				gen_action('remove_pc', space);
			}
		}
	}
}

/* PLAY OPS CARD FOR PC ACTIONS */

function goto_ops_pc(count) {
	game.count = count;
	game.state = 'ops_pc';
	if (game.active == BRITISH)
		gen_british_pc_ops_start();
}

states.ops_pc = {
	prompt: function (current) {
		view.prompt = "Place or flip PC markers. " + game.count + " left.";
		gen_pass();
		if (game.count > 0) {
			if (game.active == BRITISH)
				gen_british_pc_ops();
			else
				gen_american_pc_ops()
		}
	},
	place_british_pc: function (space) {
		push_undo();
		place_british_pc(space);
		--game.count;
	},
	place_american_pc: function (space) {
		push_undo();
		place_american_pc(space);
		--game.count;
	},
	flip_pc: function (space) {
		push_undo();
		flip_pc(space);
		--game.count;
	},
	pass: function () {
		if (game.active == BRITISH)
			gen_british_pc_ops_end();
		end_strategy_card();
	},
}

function gen_british_pc_ops_start() {
	game.british_pc_space_list = [];
	for (let space in SPACES) {
		if (has_no_pc(space) && has_no_american_unit(space)) {
			if (is_adjacent_to_british_pc(space))
				game.british_pc_space_list.push(space);
		}
	}
}

function gen_british_pc_ops() {
	for (let space of game.british_pc_space_list)
		gen_action('place_british_pc', space);
	for (let space in SPACES) {
		if (has_british_army(space)) {
			if (has_no_pc(space))
				gen_action('place_british_pc', space);
			else if (has_american_pc(space))
				gen_action('flip_pc', space);
		}
	}
}

function gen_british_pc_ops_end(space) {
	delete game.british_pc_space_list;
}

function gen_american_pc_ops() {
	for (let space in SPACES) {
		if (has_no_pc(space) && has_no_british_cu(space)) {
			if (allowed_to_place_american_pc())
				gen_action('place_american_pc', space);
		}
		else if (has_british_pc(space) && has_american_or_french_general(space)) {
			gen_action('flip_pc', space);
		}
	}
}

/* PLAY OPS CARD FOR REINFORCEMENTS */

function goto_ops_reinforcements(c) {
	let count = CARDS[c].count;
	play_card(c, "for reinforcements");
	if (game.active == BRITISH) {
		game.played_british_reinforcements = count;
		game.count = count_british_cu(BRITISH_REINFORCEMENTS);
		game.state = 'ops_british_reinforcements_who';
	} else {
		game.played_american_reinforcements.push(count);
		game.count = count;
		game.state = 'ops_american_reinforcements_who';
	}
}

states.ops_british_reinforcements_who = {
	prompt: function (current) {
		view.prompt = "Reinforcements: choose an available general or pass to bring only CU."
		view.prompt += " Carrying " + game.count + " British CU.";
		gen_pass();
		gen_british_reinforcements_who();
	},
	drop_british_cu: function () {
		--game.count;
	},
	pickup_british_cu: function () {
		++game.count;
	},
	select_general: function (g) {
		push_undo();
		game.state = 'ops_british_reinforcements_where';
		game.who = g;
	},
	pass: function () {
		push_undo();
		game.state = 'ops_british_reinforcements_where';
		game.who = null;
	},
}

states.ops_british_reinforcements_where = {
	prompt: function (current) {
		view.prompt = "Reinforcements: choose a port space.";
		view.prompt += " Carrying " + game.count + " British CU.";
		gen_british_reinforcements_where();
	},
	drop_british_cu: function () {
		--game.count;
	},
	pickup_british_cu: function () {
		++game.count;
	},
	place_reinforcements: function (space) {
		place_british_reinforcements(game.who, game.count, space);
		end_strategy_card();
		game.who = null;
	},
}

states.ops_american_reinforcements_who = {
	prompt: function (current) {
		view.prompt = "Reinforcements: choose an available general or pass to bring only CU.";
		gen_pass();
		gen_american_reinforcements_who();
	},
	select_general: function (g) {
		push_undo();
		game.state = 'ops_american_reinforcements_where';
		game.who = g;
	},
	pass: function () {
		push_undo();
		game.state = 'ops_american_reinforcements_where';
		game.who = null;
	},
}

states.ops_american_reinforcements_where = {
	prompt: function (current) {
		view.prompt = "Reinforcements: choose a space.";
		gen_american_reinforcements_where(game.who);
	},
	place_reinforcements: function (space) {
		if (game.who == ROCHAMBEAU)
			place_french_reinforcements(game.who, space);
		else
			place_american_reinforcements(game.who, game.count, space);
		end_strategy_card();
		game.who = null;
	},
}

function gen_british_reinforcements_who() {
	for (let g of BRITISH_GENERALS) {
		let general = game.generals[g];
		if (general.location == BRITISH_REINFORCEMENTS) {
			gen_action('select_general', g);
		}
	}
	if (game.count > 0)
		gen_action('drop_british_cu');
	if (game.count < count_british_cu(BRITISH_REINFORCEMENTS))
		gen_action('pickup_british_cu');
}

function gen_british_reinforcements_where() {
	for (let space in SPACES) {
		if (is_non_blockaded_port(space))
			if (!has_american_or_french_cu(space) && !has_american_pc(space))
				gen_action('place_reinforcements', space);
	}
	if (game.count > 0)
		gen_action('drop_british_cu');
	if (game.count < count_british_cu(BRITISH_REINFORCEMENTS))
		gen_action('pickup_british_cu');
}

function gen_american_reinforcements_who() {
	for (let g of AMERICAN_GENERALS) {
		let general = game.generals[g];
		if (general.location == AMERICAN_REINFORCEMENTS) {
			gen_action('select_general', g);
		}
	}
}

function gen_american_reinforcements_where(general) {
	for (let space in SPACES) {
		if (!has_british_cu(space) && !has_british_pc(space)) {
			if (general == ROCHAMBEAU) {
				if (SPACES[space].port)
					gen_action('place_reinforcements', space);
			} else {
				gen_action('place_reinforcements', space);
			}
		}
	}
}

/* PLAY OPS CARD TO MOVE A GENERAL */

function goto_ops_general(c) {
	play_card(c, " to activate a general");
	if (game.active == BRITISH) {
		game.count = CARDS[c].count + game.b_queue;
		game.b_queue = 0;
	} else {
		game.count = CARDS[c].count + game.a_queue;
		game.a_queue = 0;
	}
	game.state = 'ops_general_who';
}

states.ops_general_who = {
	prompt: function (current) {
		if (game.campaign && game.landing_party)
			view.prompt = "Campaign: Activate a general or use a landing party. " + game.campaign + " left.";
		else if (game.campaign)
			view.prompt = "Campaign: Activate a general. " + game.campaign + " left.";
		else
			view.prompt = "Activate a general with strategy rating " + game.count + " or lower.";
		if (game.landing_party)
			gen_landing_party();
		gen_activate_general();
		gen_pass();
	},
	place_british_pc: function (where) {
		game.landing_party = 0;
		place_british_pc(where);
		end_strategy_card();
	},
	flip_pc: function (where) {
		game.landing_party = 0;
		flip_pc(where);
		end_strategy_card();
	},
	select_general: function (g) {
		push_undo();
		goto_ops_general_move(g, false);
	},
	pass: function () {
		if (game.campaign > 0)
			game.campaign = 0;
		end_strategy_card();
	}
}

function gen_landing_party() {
	for (let space in SPACES) {
		if (!is_fortified_port(space) && is_non_blockaded_port(space)) {
			if (has_american_pc(space) && has_no_american_unit(space))
				gen_action('flip_pc', space);
			if (has_no_pc(space) && has_no_american_unit(space) && has_no_british_playing_piece(space))
				gen_action('place_british_pc', space);
		}
	}
}

function gen_activate_general() {
	if (game.active == BRITISH)
		return gen_activate_british_general();
	else
		return gen_activate_american_general();
}

function gen_activate_british_general() {
	for (let g of BRITISH_GENERALS)
		if (is_general_on_map(g) && GENERALS[g].strategy <= game.count && !game.moved[g])
			gen_action('select_general', g);
}

function gen_activate_american_general() {
	for (let g of AMERICAN_GENERALS)
		if (is_general_on_map(g) && GENERALS[g].strategy <= game.count && !game.moved[g])
			gen_action('select_general', g);
}

function goto_remove_general(where) {
	game.state = 'remove_general';
	game.where = where;
}

states.remove_general = {
	prompt: function (current) {
		view.prompt = "Remove a general to the reinforcements box.";
		gen_remove_general();
	},
	select_general: function (g) {
		if (game.active == BRITISH)
			move_general(g, BRITISH_REINFORCEMENTS);
		else
			move_general(g, AMERICAN_REINFORCEMENTS);
		end_strategy_card();
	},
}

function goto_remove_general_after_intercept() {
	game.state = 'remove_general_after_intercept';
}

states.remove_general_after_intercept = {
	prompt: function (current) {
		view.prompt = "Remove a general to the reinforcements box.";
		gen_remove_general();
	},
	select_general: function (g) {
		if (game.active == BRITISH)
			move_general(g, BRITISH_REINFORCEMENTS);
		else
			move_general(g, AMERICAN_REINFORCEMENTS);
		end_intercept();
	},
}

function goto_remove_general_after_retreat(where) {
	game.state = 'remove_general_after_retreat';
	game.where = where;
}

states.remove_general_after_retreat = {
	prompt: function (current) {
		view.prompt = "Remove a general to the reinforcements box.";
		gen_remove_general();
	},
	select_general: function (g) {
		if (game.active == BRITISH)
			move_general(g, BRITISH_REINFORCEMENTS);
		else
			move_general(g, AMERICAN_REINFORCEMENTS);
		end_battle();
	},
}

function gen_remove_general() {
	if (game.active == BRITISH)
		return gen_remove_british_general();
	else
		return gen_remove_american_general();
}

function gen_remove_british_general() {
	for (let g of BRITISH_GENERALS)
		if (location_of_general(g) == game.where)
			gen_action('select_general', g);
}

function gen_remove_american_general() {
	for (let g of AMERICAN_GENERALS)
		if (g != WASHINGTON)
			if (location_of_general(g) == game.where)
				gen_action('select_general', g);
}

function goto_ops_general_move(g, marblehead) {
	game.state = 'ops_general_move';
	game.who = g;
	if (marblehead) {
		game.mobility = false;
		game.count = 6;
	} else {
		if (game.active == BRITISH) {
			game.mobility = false;
			game.count = 4;
		} else {
			game.mobility = true;
			game.count = 5;
		}
	}
	let where = location_of_general(g);
	if (game.active == BRITISH)
		pickup_max_british_cu(where);
	else
		pickup_max_american_cu(where);
}

states.ops_general_move = {
	prompt: function (current) {
		view.prompt = "Move " + game.who + " with ";
		if (game.carry_british > 0) {
			view.prompt += game.carry_british + " British CU.";
		} else if (game.carry_french + game.carry_american > 0) {
			if (game.carry_french > 0) {
				if (game.carry_american > 0) {
					view.prompt += game.carry_french + " French CU and ";
					view.prompt += game.carry_american + " American CU.";
				} else {
					view.prompt += game.carry_french + " French CU.";
				}
			} else {
				view.prompt += game.carry_american + " American CU.";
			}
		} else {
			view.prompt += game.carry_american + " no CU.";
		}
		if (game.count == 1)
			view.prompt += " " + game.count + " move left.";
		else if (game.count > 1)
			view.prompt += " " + game.count + " moves left.";

		// Cannot stop on enemy general
		if (!has_enemy_general(location_of_general(game.who)))
			gen_pass();

		gen_carry_cu();
		gen_move_general();
	},

	pickup_british_cu: function () { ++game.carry_british; },
	pickup_american_cu: function () { ++game.carry_american; },
	pickup_french_cu: function () { ++game.carry_french; },

	drop_british_cu: function () {
		push_undo();
		--game.carry_british;
		if (game.moved[game.who])
			mark_moved_cu(BRITISH, location_of_general(game.who), 1);
	},
	drop_american_cu: function () {
		push_undo();
		--game.carry_american;
		if (game.moved[game.who])
			mark_moved_cu(AMERICAN, location_of_general(game.who), 1);
	},
	drop_french_cu: function () {
		push_undo();
		--game.carry_french;
		if (game.moved[game.who])
			mark_moved_cu(FRENCH, location_of_general(game.who), 1);
	},

	move: function (to) {
		push_undo();

		game.moved[game.who] = 1;
		let from = location_of_general(game.who);
		let cu = game.carry_british + game.carry_american + game.carry_french;

		let intercept = false;
		if (game.active == BRITISH) {
			let is_sea_move = (path_type(from, to) == undefined);
			if (has_american_pc(to) && cu > 0 && !is_sea_move && !has_british_cu(to))
				intercept = can_intercept_to(to);
		}

		move_army(game.who, from, to);

		if (cu > 0) {
			if (has_enemy_general(to) && !has_enemy_cu(to)) {
				capture_enemy_general(to);
			}
			if (game.active == BRITISH && game.congress == to && !has_enemy_cu(to)) {
				disperse_continental_congress(to);
			}
			if (cu >= 4 && count_enemy_cu(to) == 1 && !has_enemy_general(to)) {
				overrun(to);
			}
		}

		if (intercept)
			goto_intercept(from, to);
		else
			resume_moving(from, to);
	},
	pass: function () {
		clear_undo();
		let where = location_of_general(game.who);
		end_move();
		if (count_friendly_generals(where) > 1)
			goto_remove_general(where);
		else
			end_strategy_card();
	},
}

function resume_moving(from, to) {
	if (has_enemy_cu(to)) {
		end_move();
		goto_start_battle(from, to);
	}
}

function can_intercept_to(to) {
	for (let space of SPACES[to].exits) {
		if (has_american_army(space)) {
			let g = find_american_or_french_general(space);
			if (g && !game.moved[g])
				return true;
		}
	}
	return false;
}

function gen_intercept() {
	for (let space of SPACES[game.where].exits) {
		if (has_american_army(space)) {
			let g = find_american_or_french_general(space);
			if (g && !game.moved[g])
				gen_action('select_general', g);
		}
	}
}

function goto_intercept(from, where) {
	clear_undo();
	game.save_who = game.who;
	game.who = null;
	game.from = from;
	game.where = where;
	game.active = AMERICAN;
	game.state = 'intercept';
}

states.intercept = {
	prompt: function (current) {
		view.prompt = "Intercept " + game.save_who + " in " + game.where + "?";
		gen_pass();
		gen_intercept();
	},
	select_general: function (g) {
		game.moved[g] = 1;
		let die = roll_d6();
		if (die <= GENERALS[g].agility) {
			log(g + " intercepted (" + die + " <= " + GENERALS[g].agility + ")");
			game.did_intercept = 1;

			let save_carry_british = game.carry_british;
			let save_carry_american = game.carry_american;
			let save_carry_french = game.carry_french;

			pickup_max_american_cu(location_of_general(g));
			intercept_army(g, location_of_general(g), game.where);

			game.carry_british = save_carry_british;
			game.carry_american = save_carry_american;
			game.carry_french = save_carry_french;

			if (count_friendly_generals(game.where) > 1)
				goto_remove_general_after_intercept();
			else
				end_intercept();
		} else {
			log(g + " failed to intercept (" + die + " > " + GENERALS[g].agility + ")");
			if (!can_intercept_to(game.where))
				end_intercept();
		}
	},
	pass: function () {
		end_intercept();
	},
}

function end_intercept() {
	game.active = BRITISH;
	game.state = 'ops_general_move';
	game.who = game.save_who;
	delete game.save_who;
	resume_moving(game.from, game.where);
	delete game.from;
}

function end_move() {
	let where = location_of_general(game.who);
	if (game.moved[game.who]) {
		mark_moved_cu(BRITISH, where, game.carry_british);
		mark_moved_cu(AMERICAN, where, game.carry_american);
		mark_moved_cu(FRENCH, where, game.carry_french);
	}
	game.who = null;
	delete game.mobility;
	delete game.carry_british;
	delete game.carry_american;
	delete game.carry_french;
}

function path_type(from, to) {
	return PATH_TYPE[PATH_INDEX[from][to]];
}

function path_name(from, to) {
	return PATH_NAME[PATH_INDEX[from][to]];
}

function gen_carry_cu() {
	let where = location_of_general(game.who);
	if (game.active == BRITISH) {
		if (game.carry_british > 0)
			gen_action('drop_british_cu');
		if (game.carry_british < 5 && game.carry_british < count_unmoved_british_cu(where))
			gen_action('pickup_british_cu');
	} else {
		let carry_total = game.carry_french + game.carry_american;
		if (game.carry_french > 0)
			gen_action('drop_french_cu');
		if (game.carry_american > 0)
			gen_action('drop_american_cu');
		if (carry_total < 5 && game.carry_french < count_unmoved_french_cu(where))
			gen_action('pickup_french_cu');
		if (carry_total < 5 && game.carry_american < count_unmoved_american_cu(where))
			gen_action('pickup_american_cu');
	}
}

function movement_cost(from, to) {
	switch (path_type(from, to)) {
	case undefined: return 4; /* must be a sea connection if no direct path */
	case 'wilderness': return 3;
	default: return 1;
	}
}

function gen_move_general() {
	let from = location_of_general(game.who);
	let alone = (game.carry_british + game.carry_american + game.carry_french) == 0;
	for (let to of SPACES[from].exits) {
		let mp = 1;
		if (path_type(from, to) == 'wilderness') {
			if (path_name(from, to) == FALMOUTH_QUEBEC)
				if (game.who != ARNOLD)
					continue;
			mp = 3;
		}

		if (alone) {
			if (has_enemy_cu(to))
				continue;
			if (has_enemy_pc(to))
				continue;
			// TODO: more robust check for not stopping (or allow undo in case he gets stuck)
			if (has_enemy_general(to) && game.count - mp == 0)
				continue;
		}

		if (game.mobility && has_enemy_cu(to)) {
			if (game.count - mp >= 1)
				gen_action('move', to);
		} else {
			if (game.count - mp >= 0)
				gen_action('move', to);
		}
	}
	if (game.active == BRITISH && game.count == 4) {
		if (is_non_blockaded_port(from)) {
			for (let to in SPACES) {
				if (to != from) {
					if (is_non_blockaded_port(to)) {
						if (!has_american_pc(to) && !has_american_or_french_cu(to)) {
							// TODO: duplicate action if can move by normal road
							gen_action('move', to);
						}
					}
				}
			}
		}
	}
}

/* CAMPAIGN */

function goto_campaign(c) {
	play_card(c);
	game.state = 'campaign';
	game.campaign = CARDS[c].count;
	game.landing_party = game.active == BRITISH ? 1 : 0;
	game.count = 3; // can activate any general!
	game.state = 'ops_general_who';
}

/* EVENTS */

events.the_war_ends = function (c, card) {
	logp("played #" + c);
	log("The war will end in " + card.year);
	game.last_played = c;
	remove_from_array(active_hand(), c);
	if (game.war_ends)
		game.discard.push(WAR_ENDS_1779 + game.war_ends - 1779);
	game.war_ends = card.year;
	end_strategy_card();
}

events.remove_random_british_card = function (c, card) {
	play_card(c);
	remove_random_card(game.b_hand);
	end_strategy_card();
}

events.remove_random_american_card = function (c, card) {
	play_card(c);
	remove_random_card(game.a_hand);
	end_strategy_card();
}

function remove_random_card(hand) {
	if (hand.length > 0) {
		let i = random(hand.length);
		let c = hand[i];
		discard_card_from_hand(hand, c);
		if (CARDS[c].type == 'mandatory-event')
			do_event(c);
		else
			end_strategy_card();
	}
}

function advance_french_alliance(count) {
	if (game.french_alliance < 9) {
		game.french_alliance += count;
		if (game.french_alliance > 9)
			game.french_alliance = 9;
		log("French alliance advanced to " + count);
	}
}

function lose_regular_advantage() {
	if (game.regulars) {
		log("British Regulars Advantage lost!");
		game.regulars = false;
		advance_french_alliance(2);
	}
}

events.baron_von_steuben_trains_the_continental_army = function (c, card) {
	play_card(c);
	if (is_general_on_map(WASHINGTON)) {
		let where = location_of_general(WASHINGTON);
		logp("placed 2 CU with Washington in " + where);
		place_american_cu(where, 2);
		lose_regular_advantage();
	}
	end_strategy_card();
}

events.advance_french_alliance = function (c, card) {
	play_card(c);
	advance_french_alliance(card.count);
	end_strategy_card();
}

events.remove_french_navy = function (c, card) {
	play_card(c);
	game.french_navy = TURN_TRACK[game.year+1];
	end_strategy_card();
}

events.remove_british_pc_from = function (c, card) {
	play_card(c);
	game.count = card.count;
	game.where = card.where;
	game.state = 'remove_british_pc_from';
}

states.remove_british_pc_from = {
	prompt: function (current) {
		view.prompt = "Remove British PC markers from " + game.where.join(", ") + ". " + game.count + " left.";
		gen_pass();
		gen_remove_british_pc_from(game.where);
	},
	remove_pc: function (where) {
		remove_pc(where);
		if (--game.count == 0) {
			delete game.where;
			end_strategy_card();
		}
	},
	pass: function () {
		delete game.where;
		end_strategy_card();
	},
}

events.remove_american_pc = function (c, card) {
	play_card(c);
	game.count = card.count;
	game.state = 'remove_american_pc';
}

states.remove_american_pc = {
	prompt: function (current) {
		view.prompt = "Remove American PC markers. " + game.count + " left.";
		gen_pass();
		gen_remove_american_pc();
	},
	remove_pc: function (where) {
		remove_pc(where);
		if (--game.count == 0) {
			end_strategy_card();
		}
	},
	pass: function () {
		end_strategy_card();
	},
}

events.remove_american_pc_from = function (c, card) {
	play_card(c);
	game.count = card.count;
	game.where = card.where;
	game.state = 'remove_american_pc_from';
}

states.remove_american_pc_from = {
	prompt: function (current) {
		view.prompt = "Remove American PC markers from " + game.where.join(", ") + ". " + game.count + " left.";
		gen_pass();
		gen_remove_american_pc_from(game.where);
	},
	remove_pc: function (where) {
		remove_pc(where);
		if (--game.count == 0) {
			delete game.where;
			end_strategy_card();
		}
	},
	pass: function () {
		delete game.where;
		end_strategy_card();
	},
}

events.remove_american_pc_from_non_port = function (c, card) {
	play_card(c);
	game.count = card.count;
	game.where = card.where;
	game.state = 'remove_american_pc_from_non_port';
}

states.remove_american_pc_from_non_port = {
	prompt: function (current) {
		view.prompt = "Remove American PC markers from non-Port space in " + game.where.join(", ") + ". " + game.count + " left.";
		gen_pass();
		gen_remove_american_pc_from_non_port(game.where);
	},
	remove_pc: function (where) {
		remove_pc(where);
		if (--game.count == 0) {
			delete game.where;
			end_strategy_card();
		}
	},
	pass: function () {
		delete game.where;
		end_strategy_card();
	},
}

events.remove_american_pc_within_two_spaces_of_a_british_general = function (c, card) {
	play_card(c);
	game.count = card.count;
	game.state = 'remove_american_pc_within_two_spaces_of_a_british_general';
}

states.remove_american_pc_within_two_spaces_of_a_british_general = {
	prompt: function (current) {
		view.prompt = "Remove American PC markers within two spaces of a British general. " + game.count + " left.";
		gen_pass();
		gen_remove_american_pc_within_two_spaces_of_a_british_general();
	},
	remove_pc: function (where) {
		remove_pc(where);
		if (--game.count == 0) {
			delete game.where;
			end_strategy_card();
		}
	},
	pass: function () {
		delete game.where;
		end_strategy_card();
	},
}

events.place_american_pc = function (c, card) {
	play_card(c);
	game.count = card.count;
	game.state = 'place_american_pc';
}

states.place_american_pc = {
	prompt: function (current) {
		view.prompt = "Place American PC markers. " + game.count + " left.";
		gen_pass();
		gen_place_american_pc();
	},
	place_american_pc: function (where) {
		place_american_pc(where);
		if (--game.count == 0) {
			end_strategy_card();
		}
	},
	pass: function () {
		end_strategy_card();
	},
}

events.place_american_pc_in = function (c, card) {
	play_card(c);
	game.count = card.count;
	game.where = card.where;
	game.state = 'place_american_pc_in';
}

states.place_american_pc_in = {
	prompt: function (current) {
		view.prompt = "Place American PC markers in " + game.where.join(", ") + ". " + game.count + " left.";
		gen_pass();
		gen_place_american_pc_in(game.where);
	},
	place_american_pc: function (where) {
		place_american_pc(where);
		if (--game.count == 0) {
			delete game.where;
			end_strategy_card();
		}
	},
	pass: function () {
		delete game.where;
		end_strategy_card();
	},
}

events.lord_sandwich_coastal_raids = function (c, card) {
	play_card(c);
	game.state = 'lord_sandwich_coastal_raids';
	game.count = 2;
	game.where = null;
}

states.lord_sandwich_coastal_raids = {
	prompt: function (current) {
		view.prompt = "Remove two or flip one American PC in a port space.";
		gen_pass();
		gen_lord_sandwich_coastal_raids(game.where);
	},
	place_british_pc: function (where) {
		place_british_pc(where);
		end_strategy_card();
	},
	remove_pc: function (where) {
		game.where = where;
		remove_pc(where);
		if (--game.count == 0)
			end_strategy_card();
	},
	pass: function () {
		end_strategy_card();
	},
}

function gen_lord_sandwich_coastal_raids(first_removed) {
	for (let space in SPACES) {
		if (SPACES[space].port)
			if (has_american_pc(space) && has_no_american_unit(space))
				gen_action('remove_pc', space);
		if (space == first_removed)
			gen_action('place_british_pc', space);
	}
}

events.remove_american_cu = function (c, card) {
	play_card(c);
	game.state = 'remove_american_cu';
}

states.remove_american_cu = {
	prompt: function (current) {
		view.prompt = "Remove one American CU from any space.";
		gen_pass();
		gen_remove_american_cu();
	},
	remove_cu: function (where) {
		let cu = find_american_cu(where) || find_french_cu(where);
		remove_cu(cu.owner, where, 1);
		end_strategy_card();
	},
	pass: function () {
		end_strategy_card();
	},
}

function gen_remove_american_cu() {
	for (let space in SPACES) {
		if (has_american_or_french_cu(space))
			gen_action('remove_cu', space);
	}
}

function gen_remove_british_cu() {
	for (let space in SPACES) {
		if (has_british_cu(space))
			gen_action('remove_cu', space);
	}
}

events.pennsylvania_and_new_jersey_line_mutinies = function (c, card) {
	play_card(c);
	game.pennsylvania_and_new_jersey_line_mutinies = true;
	game.state = 'pennsylvania_and_new_jersey_line_mutinies';
	game.count = 2;
	game.where = null;
}

states.pennsylvania_and_new_jersey_line_mutinies = {
	prompt: function (current) {
		view.prompt = "Remove two American CUs from the map, one each from two different spaces.";
		gen_pass();
		gen_pennsylvania_and_new_jersey_line_mutinies(game.where);
	},
	remove_cu: function (where) {
		let cu = find_american_cu(where) || find_french_cu(where);
		remove_cu(cu.owner, where, 1);
		game.where = where;
		if (--game.count == 0)
			end_strategy_card();
	},
	pass: function () {
		end_strategy_card();
	},
}

function gen_pennsylvania_and_new_jersey_line_mutinies(first_removed) {
	for (let space in SPACES) {
		if (has_american_or_french_cu(space))
			if (space != first_removed)
				gen_action('remove_cu', space);
	}
}

events.john_glovers_marblehead_regiment = function (c, card) {
	play_card(c);
	game.state = 'john_glovers_marblehead_regiment_who';
	game.count = 3; // strategy rating for gen_activate_general
}

states.john_glovers_marblehead_regiment_who = {
	prompt: function (current) {
		view.prompt = "Activate an American general.";
		gen_activate_general();
	},
	select_general: function (g) {
		goto_ops_general_move(g, true);
	},
}

events.declaration_of_independence = function (c, card) {
	play_card(c);
	game.last_active = game.active;
	game.active = AMERICAN;
	game.doi = THE_13_COLONIES.slice();
	game.state = 'declaration_of_independence';
}

states.declaration_of_independence = {
	prompt: function (current) {
		view.prompt = "Declaration of Independence: Place 1 PC marker in each of the 13 colonies. ";
		view.prompt += game.doi.length + " left.";
		gen_pass();
		gen_place_american_pc_in(game.doi);
	},
	place_american_pc: function (space) {
		let colony = SPACES[space].colony;
		remove_from_array(game.doi, colony);
		place_american_pc(space);
		if (game.doi.length == 0)
			end_declaration_of_independence();
	},
	pass: function () {
		end_declaration_of_independence();
	}
}

function end_declaration_of_independence() {
	game.active = game.last_active;
	delete game.last_active;
	delete game.doi;
	end_strategy_card();
}

function goto_george_washington_captured() {
	/* Save all the state we clobber during the interrupt. */
	game.last_state = game.state;
	game.last_active = game.active;
	game.last_count = game.count;

	game.state = 'george_washington_captured';
	game.active = BRITISH;
	game.count = 5;
}

states.george_washington_captured = {
	prompt: function (current) {
		view.prompt = "George Washington is captured! Remove American PC markers. " + game.count + " left.";
		gen_pass();
		gen_remove_american_pc();
	},
	remove_pc: function (where) {
		remove_pc(where);
		if (--game.count == 0) {
			end_george_washington_captured();
		}
	},
	pass: function () {
		end_george_washington_captured();
	},
}

function end_george_washington_captured() {
	/* Restore previous state. */
	game.state = game.last_state;
	game.count = game.last_count;
	game.active = game.last_active;
	delete game.last_state;
	delete game.last_active;
	delete game.last_count;
}

function do_event(c) {
	let card = CARDS[c];
	if (card.event in events)
		events[card.event](c, card);
	else
		throw new Error("Event not implemented yet: " + card.event)
}

/* BATTLE */

function can_retreat_before_battle(where) {
	if (game.did_intercept)
		return false;
	// can't retreat if attempted (successful or not) interception!
	let g = find_american_or_french_general(where);
	if (g && !game.moved[g])
		return true;
	return false;
}

function goto_start_battle(from, where) {
	clear_undo();
	game.attacker = game.active;
	game.attack_from = from;
	game.british_losses = 0;
	game.where = where;
	game.a_bonus = 0;
	game.b_bonus = 0;
	if (game.active == BRITISH && can_retreat_before_battle(where))
		goto_retreat_before_battle();
	else
		goto_play_attacker_battle_card();
}

function goto_retreat_before_battle() {
	game.active = AMERICAN;
	game.who = find_american_or_french_general(game.where);
	game.state = 'retreat_before_battle';
}

states.retreat_before_battle = {
	prompt: function (current) {
		view.prompt = "Attempt retreat before battle?";
		gen_pass();
		gen_defender_retreat();
	},
	move: function (to) {
		let agility = GENERALS[game.who].agility;
		if (GENERALS[game.who].bonus)
			agility += 2;
		let roll = roll_d6();
		if (roll <= agility) {
			logp("successfully retreated before battle: " + roll + " <= " + agility);
			pickup_max_american_cu(game.where);
			move_army(game.who, game.where, to);
			goto_remove_general_after_retreat_before_battle(to);
		} else {
			logp("failed to retreat before battle: " + roll + " > " + agility);
			end_retreat_before_battle();
		}
	},
	pass: function () {
		end_retreat_before_battle();
	},
}

function goto_remove_general_after_retreat_before_battle(to) {
	if (count_friendly_generals(to) > 1) {
		game.state = 'remove_general_after_retreat_before_battle';
		game.save_where = game.where;
		game.where = to;
	} else {
		end_remove_general_after_retreat_before_battle();
	}
}

states.remove_general_after_retreat_before_battle = {
	prompt: function (current) {
		view.prompt = "Remove a general to the reinforcements box.";
		gen_remove_general();
	},
	select_general: function (g) {
		if (game.active == BRITISH)
			move_general(g, BRITISH_REINFORCEMENTS);
		else
			move_general(g, AMERICAN_REINFORCEMENTS);
		game.where = game.save_where;
		delete game.save_where;
		end_remove_general_after_retreat_before_battle();
	},
}


function end_remove_general_after_retreat_before_battle() {
	let b_cu = count_british_cu(game.where);
	let a_cu = count_american_and_french_cu(game.where);
	if (a_cu == 0) {
		end_battle();
	} else if (b_cu >= 4 && a_cu == 1) {
		overrun(game.where);
		end_battle();
	} else {
		end_retreat_before_battle();
	}
}

function can_defender_retreat(to) {
	if (to == game.attack_from)
		return false;
	if (has_enemy_pc(to))
		return false;
	if (has_enemy_cu(to))
		return false;
	return true;
}

function can_attacker_retreat() {
	let to = game.attack_from;
	if (has_enemy_pc(to))
		return false;
	if (has_enemy_cu(to))
		return false;
	return true;
}

function gen_defender_retreat() {
	let from = game.where;
	for (let to of SPACES[from].exits) {
		if (can_defender_retreat(to))
			gen_action('move', to);
	}
	if (game.active == BRITISH) {
		let can_sea_retreat = false;
		if (is_non_blockaded_port(from)) {
			if (is_fortified_port(from)) {
				if (has_british_pc(from) && is_non_blockaded_port(from))
					can_sea_retreat = true;
			} else {
				can_sea_retreat = true;
			}
		}
		if (can_sea_retreat) {
			for (let to in SPACES) {
				if (to != from && is_non_blockaded_port(to)) {
					if (!has_american_pc(to) && !has_american_or_french_cu(to)) {
						gen_action('move', to);
					}
				}
			}
		}
	}
}

function gen_attacker_retreat() {
	if (can_attacker_retreat())
		gen_action('move', game.attack_from);
}

function end_retreat_before_battle() {
	game.who = null;
	goto_play_attacker_battle_card();
}

function goto_play_attacker_battle_card() {
	game.active = game.attacker;
	game.state = 'play_attacker_battle_card';
}

states.play_attacker_battle_card = {
	prompt: function (current) {
		view.prompt = "Attack: Play or discard event for DRM.";
		gen_pass();
		gen_battle_card();
	},
	card_battle_play: function (c) {
		play_card(c, "for +2 DRM");
		if (game.active == BRITISH) {
			if (CARDS[c].event == 'remove_benedict_arnold')
				remove_benedict_arnold();
			game.b_draw_after_battle = true;
			game.b_bonus += 2;
		} else {
			game.a_draw_after_battle = true;
			game.a_bonus += 2;
		}
		goto_play_defender_battle_card();
	},
	card_battle_discard: function (c) {
		discard_card(c, "for +1 DRM");
		if (game.active == BRITISH) {
			game.b_draw_after_battle = true;
			game.b_bonus += 1;
		} else {
			game.a_draw_after_battle = true;
			game.a_bonus += 1;
		}
		goto_play_defender_battle_card();
	},
	pass: function () {
		goto_play_defender_battle_card();
	},
}

function goto_play_defender_battle_card() {
	game.state = 'play_defender_battle_card';
	game.active = ENEMY[game.attacker];
}

states.play_defender_battle_card = {
	prompt: function (current) {
		view.prompt = "Defend: Play or discard event for DRM.";
		gen_pass();
		gen_battle_card();
	},
	card_battle_play: function (c) {
		play_card(c, "for +2 DRM");
		if (game.active == BRITISH) {
			if (CARDS[c].event == 'remove_benedict_arnold')
				remove_benedict_arnold();
			game.b_draw_after_battle = true;
			game.b_bonus += 2;
		} else {
			game.a_draw_after_battle = true;
			game.a_bonus += 2;
		}
		resolve_battle();
	},
	card_battle_discard: function (c) {
		discard_card(c, "for +1 DRM");
		if (game.active == BRITISH) {
			game.b_draw_after_battle = true;
			game.b_bonus += 1;
		} else {
			game.a_draw_after_battle = true;
			game.a_bonus += 1;
		}
		resolve_battle();
	},
	pass: function () {
		resolve_battle();
	},
}

function gen_battle_card() {
	for (let c of active_hand()) {
		let card = CARDS[c];
		if (game.active == BRITISH) {
			switch (card.type) {
			case 'british-battle':
			case 'british-event-or-battle':
				gen_action('card_battle_play', c);
				break;
			case 'british-event':
			case 'american-event':
			case 'american-battle':
				gen_action('card_battle_discard', c);
				break;
			}
		} else {
			switch (card.type) {
			case 'british-battle':
			case 'british-event-or-battle':
			case 'british-event':
			case 'american-event':
				gen_action('card_battle_discard', c);
				break;
			case 'american-battle':
				gen_action('card_battle_play', c);
				break;
			}
		}
	}
}

function roll_loser_combat_losses(log) {
	let roll = roll_d6();
	let losses = 0;
	log.push("Loser Combat Loss Roll: " + roll);
	switch (roll) {
	case 1: case 2: case 3: losses = 1; break;
	case 4: case 5: losses = 2; break;
	case 6: losses = 3; break;
	}
	return losses;
}

function roll_winner_combat_losses(log, losing_general) {
	let agility = losing_general ? GENERALS[losing_general].agility : 0;
	let roll = roll_d6();
	log.push("Enemy Agility Rating: " +  agility);
	log.push("Winner Combat Loss Roll: " + roll);
	let losses = 0;
	switch (agility) {
	case 0: losses = (roll == 1) ? 1 : 0; break;
	case 1: losses = (roll <= 2) ? 1 : 0; break;
	case 2: losses = (roll <= 3) ? 1 : 0; break;
	case 3: losses = (roll <= 4) ? 1 : 0; break;
	}
	return losses;
}

function apply_british_combat_losses(max) {
	let cu = find_british_cu(game.where);
	if (cu.count > max) {
		cu.count -= max;
		return max;
	}
	remove_from_array(game.cu, cu);
	return cu.count;
}

function apply_american_combat_losses(max) {
	let cu = find_american_cu(game.where);
	if (cu) {
		if (cu.count > max) {
			cu.count -= max;
			return max;
		}
		remove_from_array(game.cu, cu);
		return cu.count;
	}
	return 0;
}

function apply_french_combat_losses(max) {
	let cu = find_french_cu(game.where);
	if (cu) {
		if (cu.count > max) {
			cu.count -= max;
			return max;
		}
		remove_from_array(game.cu, cu);
		return cu.count;
	}
	return 0;
}

function apply_american_and_french_combat_losses(max) {
	let n = apply_american_combat_losses(max);
	if (n < max)
		n += apply_french_combat_losses(max - n)
	return n;
}

function resolve_battle() {
	let a_log = [];
	let b_log = [];

	game.active = ENEMY[game.active];
	let b_g = find_british_general(game.where);
	let b_cu = count_british_cu(game.where);
	let a_g = find_american_or_french_general(game.where);
	let a_cu = count_american_and_french_cu(game.where);
	let b_br = 0;
	let a_br = 0;

	if (b_g)
		b_log.push("General: " + b_g);
	if (a_g)
		a_log.push("General: " + a_g);

	if (b_g) {
		let roll = roll_d6();
		if (roll <= 3)
			b_br = Math.min(Math.floor(GENERALS[b_g].battle / 2), b_cu);
		else
			b_br = Math.min(GENERALS[b_g].battle, b_cu);
		b_log.push("Actual Battle Rating Roll: " + roll);
	}

	if (a_g) {
		let roll = roll_d6();
		if (roll <= 3)
			a_br = Math.min(Math.floor(GENERALS[a_g].battle / 2), a_cu);
		else
			a_br = Math.min(GENERALS[a_g].battle, a_cu);
		a_log.push("Actual Battle Rating Roll: " + roll);
	}

	b_log.push("+" + b_cu + " CU");
	a_log.push("+" + a_cu + " CU");
	b_log.push("+" + b_br + " Actual Battle Rating");
	a_log.push("+" + a_br + " Actual Battle Rating");

	let b_drm = b_cu + b_br + game.b_bonus;
	if (game.regulars) {
		b_log.push("+1 British Regulars' Advantage");
		b_drm += 1;
	}
	if (is_non_blockaded_port(game.where)) {
		if (is_fortified_port(game.where)) {
			if (has_british_pc(game.where)) {
				b_log.push("+1 Royal Navy Support");
				b_drm += 1;
			}
		} else {
			b_log.push("+1 Royal Navy Support");
			b_drm += 1;
		}
	}
	if (is_british_militia(game.where)) {
		b_log.push("+1 Militia");
		b_drm += 1;
	}
	if (game.b_bonus == 2)
		b_log.push("+2 Battle Card");
	else if (game.b_bonus == 1)
		b_log.push("+1 Discard of an Event Card");

	let a_drm = a_cu + a_br + game.a_bonus;
	if (is_american_militia(game.where)) {
		a_log.push("+1 Militia");
		a_drm += 1;
	}
	if (is_american_winter_offensive()) {
		a_log.push("+2 American Winter Offensive");
		a_drm += 2;
	}
	if (game.a_bonus == 2)
		a_log.push("+2 Battle Card");
	else if (game.a_bonus == 1)
		a_log.push("+1 Discard of an Event Card");
	if (game.did_intercept) {
		a_log.push("+1 Interception");
		a_drm += 1;
	}

	let b_roll = roll_d6();
	let a_roll = roll_d6();

	b_log.push("Battle Roll: " + b_roll);
	b_log.push("Battle Total: " + (b_roll + b_drm));
	a_log.push("Battle Roll: " + a_roll);
	a_log.push("Battle Total: " + (a_roll + a_drm));

	let victor;
	if (game.active == BRITISH)
		victor = (b_roll + b_drm) >= (a_roll + a_drm) ? BRITISH : AMERICAN;
	else
		victor = (b_roll + b_drm) >= (a_roll + a_drm) ? BRITISH : AMERICAN;

	let a_lost_cu, b_lost_cu;
	if (victor == BRITISH) {
		b_lost_cu = roll_winner_combat_losses(b_log, a_g);
		a_lost_cu = roll_loser_combat_losses(a_log);
	} else {
		b_lost_cu = roll_loser_combat_losses(b_log);
		a_lost_cu = roll_winner_combat_losses(a_log, b_g);
	}

	game.british_losses = apply_british_combat_losses(b_lost_cu);
	let american_losses = apply_american_and_french_combat_losses(a_lost_cu);

	b_log.push("Losses: " + game.british_losses + " CU");
	a_log.push("Losses: " + american_losses + " CU");

	// Special case: winning general with no CU on enemy PC is captured
	if (victor == BRITISH) {
		if (b_g && count_british_cu(game.where) == 0 && has_american_pc(game.where))
			capture_british_general(game.where);
	} else {
		if (a_g && count_american_and_french_cu(game.where) == 0 && has_british_pc(game.where))
			capture_american_or_french_general(game.where);
	}

	log("BRITISH BATTLE REPORT:\n" + b_log.join("\n"));
	log("AMERICAN BATTLE REPORT:\n" + a_log.join("\n"));
	log(victor + " victory in " + game.where + "!");

	if (victor == AMERICAN)
		advance_french_alliance(1);

	goto_retreat_after_battle(victor);
}

function goto_retreat_after_battle(victor) {
	if (victor == BRITISH) {
		game.who = find_american_or_french_general(game.where);
		if (game.who == null && count_american_and_french_cu(game.where) == 0)
			return end_battle();
	} else {
		game.who = find_british_general(game.where);
		if (game.who == null && count_british_cu(game.where) == 0)
			return end_battle();
	}
	game.active = ENEMY[victor];
	game.state = 'retreat_after_battle';
}

states.retreat_after_battle = {
	prompt: function (current) {
		view.prompt = "Retreat after battle.";
		gen_action('surrender');
		if (game.active == game.attacker)
			gen_attacker_retreat();
		else
			gen_defender_retreat();
	},
	move: function (to) {
		logp("retreated to " + to);
		if (game.active == BRITISH)
			retreat_british_army(game.where, to);
		else
			retreat_american_army(game.where, to);
		if (count_friendly_generals(to) > 1)
			goto_remove_general_after_retreat(to);
		else
			end_battle();
	},
	surrender: function () {
		// End battle here, so if Washington is captured we can handle the interrupt state.
		let active = game.active;
		let where = game.where;
		end_battle();

		logp("surrendered");
		if (active == BRITISH)
			surrender_british_army(where);
		else
			surrender_american_army(where);
	},
}

function end_battle() {
	game.active = game.attacker;

	if (game.active == BRITISH && game.congress == game.where)
		disperse_continental_congress(game.where);

	if (game.british_losses >= 3)
		lose_regular_advantage();

	// TODO: delay until end of campaign
	if (game.b_draw_after_battle)
		game.b_hand.push(deal_card());
	if (game.a_draw_after_battle)
		game.a_hand.push(deal_card());

	delete game.did_intercept;
	delete game.b_bonus;
	delete game.a_bonus;
	delete game.b_draw_after_battle;
	delete game.a_draw_after_battle;
	delete game.attack_from;
	delete game.british_losses;
	delete game.attacker;
	game.where = null;
	game.who = null;
	end_strategy_card();
}

/* END TURN PHASES */

function apply_single_winter_attrition(owner, space) {
	let die = roll_d6();
	log(owner[0] + " attrition roll " + die + " in " + space);
	if (die <= 3) {
		log(owner[0] + " lost 1 CU in " + space);
		remove_cu(owner, space, 1);
	}
}

function apply_winter_attrition(owner, space, n) {
	let half = Math.floor(n / 2);
	log(owner[0] + " lost " + half + " CU in " + space);
	remove_cu(owner, space, half);
}

function goto_winter_attrition_phase() {
	logbr();
	log("Winter Attrition");

	for (let space in SPACES) {
		let wq = is_winter_quarter_space(space);
		let n_british = count_british_cu(space);
		let n_american = count_american_cu(space);
		let n_french = count_french_cu(space);
		let has_washington = game.generals[WASHINGTON].location == space;

		if (n_british == 1 && !wq)
			apply_single_winter_attrition(BRITISH, space, has_british_general(space));
		if (n_british > 1 && !wq)
			apply_winter_attrition(BRITISH, space, n_british);

		if (n_american == 0 && n_french == 1 && !wq)
			apply_single_winter_attrition(FRENCH, space, has_american_or_french_general(space));
		if (n_american == 0 && n_french > 1 && !wq)
			apply_winter_attrition(FRENCH, space, n_french);

		if (n_american == 1 && n_french == 0)
			apply_single_winter_attrition(AMERICAN, space, has_american_or_french_general(space));
		if (n_american > 1 && n_french == 0) {
			let n = n_american;
			if (has_washington && wq)
				n = Math.max(0, n - 5);
			apply_winter_attrition(AMERICAN, space, n);
		}

		if (n_american > 0 && n_french > 0) {
			let n = n_american + n_french;
			if (has_washington && wq)
				n = Math.max(0, n - 5);
			let half = Math.floor(n / 2);

			// TODO: let player choose (but why would he ever choose the french?)
			let lose_american = Math.min(half, n_american);
			log(owner[0] + " lost " + lose_american + " American CU  in " + space);
			remove_cu(AMERICAN, space, n_american);
			half -= lose_american;
			n_american -= lose_american;

			if (half > 0) {
				log(owner[0] + " lost " + half + " French CU in " + space);
				remove_cu(FRENCH, space, half);
			}
		}
	}

	if (automatic_victory())
		return;

	goto_french_naval_phase();
}

function goto_french_naval_phase() {
	if (game.french_navy != FRENCH_REINFORCEMENTS) {
		game.active = AMERICAN;
		game.state = 'place_french_navy';
	} else {
		goto_political_control_phase();
	}
}

function gen_place_french_navy() {
	gen_action('place_navy', "Sea1");
	gen_action('place_navy', "Sea2");
	gen_action('place_navy', "Sea3");
	gen_action('place_navy', "Sea4");
	gen_action('place_navy', "Sea5");
	gen_action('place_navy', "Sea6");
	gen_action('place_navy', "Sea7");
}

states.place_french_navy_trigger = {
	prompt: function (current) {
		view.prompt = "Place the French Navy in a blockade zone.";
		gen_place_french_navy();
	},
	place_navy: function (zone) {
		logp("placed French Navy.");
		game.french_navy = zone;
		game.active = game.save_active;
		delete game.save_active;
		end_strategy_card()
	},
}

states.place_french_navy = {
	prompt: function (current) {
		view.prompt = "Place the French Navy in a blockade zone.";
		gen_place_french_navy();
	},
	place_navy: function (zone) {
		logp("placed French Navy.");
		game.french_navy = zone;
		goto_political_control_phase();
	},
}

function place_pc_markers_segment() {
	for (let space in SPACES) {
		if (has_american_army(space)) {
			if (has_no_pc(space))
				place_american_pc(space);
			else if (has_british_pc(space))
				flip_pc(space);
		}
		if (has_british_army(space)) {
			if (has_no_pc(space))
				place_british_pc(space);
			else if (has_american_pc(space))
				flip_pc(space);
		}
	}
}

function is_american_pc_root(space) {
	if (has_no_pc(space) && has_no_british_cu(space))
		return true;
	if (game.congress == space)
		return true;
	if (has_american_pc(space)) {
		if (has_american_or_french_cu(space))
			return true;
		if (has_american_or_french_general(space))
			return true;
	}
	return false;
}

function is_british_pc_root(space) {
	if (has_no_pc(space) && !has_american_or_french_cu(space) && !has_american_or_french_general(space))
		return true;
	if (has_british_pc(space)) {
		if (is_port(space))
			return true;
		if (has_british_cu(space))
			return true;
	}
	return false;
}

function is_american_pc_path(space) {
	if (has_american_pc(space))
		return !has_british_army(space);
	return false;
}

function is_british_pc_path(space) {
	if (has_british_pc(space))
		return !has_american_army(space);
	return false;
}

function spread_american_path(seen, from) {
	for (let to of SPACES[from].exits) {
		if (to in seen)
			continue;
		if (is_american_pc_path(to)) {
			seen[to] = 1;
			spread_american_path(seen, to);
		}
	}
}

function spread_british_path(seen, from) {
	for (let to of SPACES[from].exits) {
		if (to in seen)
			continue;
		if (is_british_pc_path(to)) {
			seen[to] = 1;
			spread_british_path(seen, to);
		}
	}
}

function remove_isolated_american_pc_segment() {
	log("Removed isolated American PC");
	let seen = {};
	for (let space in SPACES) {
		if (is_american_pc_root(space)) {
			seen[space] = 1;
			spread_american_path(seen, space);
		}
	}
	for (let space in SPACES)
		if (has_american_pc(space) && !seen[space])
			remove_pc(space);
}

function remove_isolated_british_pc_segment() {
	log("Removed isolated British PC");
	let seen = {};
	for (let space in SPACES) {
		if (is_british_pc_root(space)) {
			seen[space] = 1;
			spread_british_path(seen, space);
		}
	}
	for (let space in SPACES)
		if (has_british_pc(space) && !seen[space])
			remove_pc(space);
}

function gen_return_continental_congress() {
	let n = 0;
	for (let space in SPACES) {
		if (SPACES[space].colony != 'CA') {
			if (has_american_pc(space) && has_no_british_playing_piece(space)) {
				gen_action('place_continental_congress', space);
				++n;
			}
		}
	}
	return n;
}

function goto_political_control_phase() {
	if (game.congress == CONTINENTAL_CONGRESS_DISPERSED) {
		game.active = AMERICAN;
		game.state = 'return_continental_congress';
	} else {
		goto_political_control_phase_2();
	}
}

states.return_continental_congress = {
	prompt: function () {
		view.prompt = "Return Continental Congress to a space in the 13 colonies.";
		if (gen_place_continental_congress() == 0)
			gen_pass();
	},
	place_continental_congress: function (where) {
		game.congess = where;
		goto_political_control_phase_2();
	},
	pass: function () {
		goto_political_control_phase_2();
	}
}

function goto_political_control_phase_2() {
	place_pc_markers_segment();
	remove_isolated_american_pc_segment();
	remove_isolated_british_pc_segment();
	goto_end_phase();
}

states.european_war = {
	prompt: function () {
		view.prompt = "European War: Remove 2 British CU from any spaces. " + game.count + " left.";
		gen_pass();
		gen_remove_british_cu();
	},
	remove_cu: function (where) {
		let cu = find_british_cu(where);
		remove_cu(BRITISH, where, 1);
		if (--game.count == 0)
			goto_end_phase();
	},
	pass: function () {
		goto_end_phase();
	}
}

function norths_government_falls() {
	update_colony_control();

	let n_american = 0;
	for (let c in COLONIES)
		if (game.control[c] == AMERICAN)
			++n_american;

	if (n_american >= 7)
		game.result = AMERICAN;
	else
		game.result = BRITISH;

	game.victory = "North's Government Falls: " + game.result + " Victory!";
	game.active = "None";
	game.state = 'game_over';

	log(game.victory);
}

function goto_end_phase() {
	if (game.french_alliance_triggered && !game.european_war) {
		game.european_war = true;
		game.count = 2;
		game.active = AMERICAN;
		game.state = 'european_war';
		game.reshuffle = true;
		return;
	}

	if ((game.war_ends && game.year >= game.war_ends) || game.year == 1783)
		return norths_government_falls();

	delete game.pennsylvania_and_new_jersey_line_mutinies;
	game.a_queue = game.b_queue = 0;
	game.year += 1;
	goto_start_year();
}

states.game_over = {
	prompt: function () {
		view.prompt = game.victory;
	}
}

/* CLIENT/SERVER COMMS */

exports.setup = function (seed, scenario, options) {
	setup_game(seed);
	return game;
}

exports.action = function (state, current, action, arg) {
	game = state;
	// TODO: check against action list
	if (current == game.active) {
		let S = states[game.state];
		if (action in S) {
			S[action](arg);
		} else {
			if (action === 'undo' && game.undo && game.undo.length > 0)
				pop_undo();
			else
				throw new Error("Invalid action: " + action);
		}
	}

	update_colony_control();

	return game;
}

function list_actions(current) {
	view.actions = {}
	states[game.state].prompt(current);
}

exports.view = function(state, current) {
	game = state;

	view = {
		active: state.active,
		year: state.year,
		war_ends: state.war_ends,
		played_british_reinforcements: state.played_british_reinforcements,
		played_american_reinforcements: state.played_american_reinforcements,
		congress: state.congress,
		european_war: state.european_war,
		french_alliance: state.french_alliance,
		french_navy: state.french_navy,
		regulars: state.regulars,
		generals: state.generals,
		cu: state.cu,
		pc: state.pc,
		control: state.control,
		a_cards: state.a_hand.length,
		b_cards: state.b_hand.length,
		a_queue: state.a_queue,
		b_queue: state.b_queue,
		last_played: state.last_played,
		who: state.who,
		log: state.log,
	}

	if (state.pennsylvania_and_new_jersey_line_mutinies)
		view.pennsylvania_and_new_jersey_line_mutinies = true;

	if (current == AMERICAN)
		view.hand = state.a_hand;
	else if (current == BRITISH)
		view.hand = state.b_hand;
	else
		view.hand = [];

	if (current == state.active) {
		list_actions(current);
		gen_action_undo();
	} else {
		let inactive = states[game.state].inactive;
		if (typeof inactive !== 'string')
			inactive = game.state;
		view.prompt = "Waiting for " + game.active + " player \u2014 " + inactive + ".";
	}

	return view;
}