'use strict';

import data, {
  // LIBERTY,
  // COLLECTIVIZATION,
  // GOVERNMENT,
  // SOVIET_SUPPORT,
  // FOREIGN_AID,
  // MORALE_BONUS,
  // TEAMWORK_BONUS,
  // OFF,
  ON,
  EventCard,
  // StaticData,
  // PLAYER_WITH_MOST_HERO_POINTS,
} from './data';

declare const brand: unique symbol;

// branded typing
type Brand<T, TBrand extends string> = T & {
  [brand]: TBrand;
};
export type CardId = Brand<number, 'CardId'>;
export type Player = Brand<string, 'Player'>;
export type FactionId = Brand<string, 'FactionId'>;

interface Game {
  [index: number]: any;
  seed: number;
  log: number | string[];
  undo: Game[];
  turn: number;
  year: number;
  active: Player | null;
  state: string | null;
  bag_of_glory: Record<FactionId, number>;
  bonuses: number[];
  current_events: CardId[];
  fronts: {
    a: number;
    m: number;
    n: number;
    s: number;
  };
  hands: Record<FactionId, CardId[]>;
  hero_points: Record<FactionId, number>;
  initiative: FactionId;
  tracks: number[];

  result?: string;
  victory?: string;

  location?: string;
  selected?: string;

  // played_card: CardId

  // turn: Turn
}

export interface View {
  log: number | string[];
  active?: string | null;
  prompt: string | null;
  actions?: any;
  victory?: string;
  location?: string;
  selected?: string;
  fronts: Game['fronts'];
  current_events: CardId[];
  hand: CardId[];
  tracks: number[];
}

// interface State {
//   inactive: string;
//   prompt: () => void;
// }

type States = {
  [key: string]: any;
};

const states = {} as States;
let game = {} as Game; // = null
var view = {} as View; // = null

const ANARCHIST = 'Anarchist' as Player;
const COMMUNIST = 'Communist' as Player;
const MODERATE = 'Moderate' as Player;

const ANARCHISTS_ID = 'a' as FactionId;
const COMMUNISTS_ID = 'c' as FactionId;
const MODERATES_ID = 'm' as FactionId;

const {
  cards,
  //  fronts
} = data;

const faction_cards = {
  [ANARCHIST]: make_list(37, 54) as CardId[],
  [COMMUNIST]: make_list(19, 36) as CardId[],
  [MODERATE]: make_list(1, 18) as CardId[],
};

const fascist_decks = {
  1: make_list(55, 62),
};

export const scenarios = ['Standard'];

export const roles: Player[] = [ANARCHIST, COMMUNIST, MODERATE];

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

function gen_action_space(space) {
  gen_action('space', space);
}

function gen_action_piece(piece) {
  gen_action('piece', piece);
}

// function gen_action_card(card) {
//   gen_action('card', card);
// }

export function action(
  state: any,
  player: Player,
  action: string,
  arg: unknown
) {
  game = state;
  let S = states[game.state];
  if (action in S) S[action](arg, player);
  else if (action === 'undo' && game.undo && game.undo.length > 0) pop_undo();
  else throw new Error('Invalid action: ' + action);
  return game;
}

// #region VIEW

export { game_view as view };

function game_view(state: Game, player: Player) {
  console.log('game_view', state);
  console.log('player', player);
  game = state;

  const faction_id = get_faction_id(player);

  view = {
    log: game.log,
    prompt: null,
    location: game.location,
    selected: game.selected,
    current_events: game.current_events,
    fronts: game.fronts,
    hand: game.hands[faction_id],
    tracks: game.tracks
  };

  if (player !== game.active) {
    let inactive = states[game.state].inactive || game.state;
    view.prompt = `Waiting for ${game.active} to ${inactive}.`;
  } else {
    view.actions = {};
    states[game.state].prompt();
    if (game.undo && game.undo.length > 0) view.actions.undo = 1;
    else view.actions.undo = 0;
  }

  return view;
}

// #endregion

// #region setup

export function setup(seed: number, _scenario: string, _options: unknown) {
  game = {
    seed: seed,
    state: null,
    active: ANARCHIST,
    bag_of_glory: {
      [ANARCHISTS_ID]: 1,
      [COMMUNISTS_ID]: 1,
      [MODERATES_ID]: 1,
    },
    bonuses: [ON, ON],
    current_events: [],
    fronts: {
      a: 2,
      m: 2,
      n: 2,
      s: 2,
    },
    hands: {
      [ANARCHISTS_ID]: [
        draw_card(faction_cards[ANARCHIST]),
        draw_card(faction_cards[ANARCHIST]),
        draw_card(faction_cards[ANARCHIST]),
        draw_card(faction_cards[ANARCHIST]),
        draw_card(faction_cards[ANARCHIST]),
      ],
      [COMMUNISTS_ID]: [
        draw_card(faction_cards[COMMUNIST]),
        draw_card(faction_cards[COMMUNIST]),
        draw_card(faction_cards[COMMUNIST]),
        draw_card(faction_cards[COMMUNIST]),
        draw_card(faction_cards[COMMUNIST]),
      ],
      [MODERATES_ID]: [
        draw_card(faction_cards[MODERATE]),
        draw_card(faction_cards[MODERATE]),
        draw_card(faction_cards[MODERATE]),
        draw_card(faction_cards[MODERATE]),
        draw_card(faction_cards[MODERATE]),
      ],
    },
    hero_points: {
      [ANARCHISTS_ID]: 2,
      [COMMUNISTS_ID]: 2,
      [MODERATES_ID]: 0,
    },
    initiative: MODERATES_ID,
    tracks: [5, 5, 6, 3, 3],
    log: [],
    undo: [],
    turn: 1,
    year: 1,
  };

  fascist_event();

  game.state = 'move';

  return game;
}

// #endregion

states.move = {
  inactive: 'move',
  prompt() {
    view.prompt = 'Move a piece.';
    for (let p = 0; p < 32; ++p) gen_action_piece(p);
  },
  // piece(p) {
  // 	game.selected = p
  // 	game.state = "move_to"
  // },
};

states.move_to = {
  inactive: 'move',
  prompt() {
    view.prompt = 'Move the piece to a space.';
    for (let s = 0; s < 64; ++s) gen_action_space(s);
  },
  // space(to) {
  // 	game.location[game.selected] = to
  // 	game.state = "move"
  // 	if (game.active === PLAYER1)
  // 		game.active = PLAYER2
  // 	else
  // 		game.active = PLAYER1
  // },
};

function pop_undo() {
  const save_log = game.log;
  const save_undo = game.undo;
  game = save_undo.pop()!;
  (save_log as string[]).length = game.log as number;
  game.log = save_log;
  game.undo = save_undo;
}

// #region CARDS
// function draw_faction_card(faction: Player): CardId {
//   return draw_faction_cards(faction, 1)[0];
// }

// function draw_faction_cards(faction: Player, count: number = 1): CardId[] {
//   const drawnCards = [];

// }

function draw_card(deck: CardId[]) {
  clear_undo();
  let i = random(deck.length);
  let c = deck[i];
  set_delete(deck, c);
  return c;
}

// #endregion

// #region EVENTS

function resolve_event_attack(target: string | number, value: number) {
  switch (target) {
    case 'v':
      break;
    case 'd':
      break;
    default:
      game.fronts[target] += value;
  }
}

function fascist_event() {
  const deck = fascist_decks[game.year];
  const cardId = draw_card(deck);
  game.current_events.push(cardId);

  const card = cards[cardId] as EventCard;

  card.effects.forEach((effect) => {
    switch (effect.type) {
      case 'attack':
        resolve_event_attack(effect.target, effect.value);
        break;
      case 'bonus':
        break;
      case 'hero_points':
        break;
      case 'track':
        game.tracks[effect.target] += effect.value;
        break;
    }
  });
}

// #endregion

// #region UTILITY

function clear_undo() {
  if (game.undo.length > 0) game.undo = [];
}

function get_faction_id(player: Player) {
  switch (player) {
    case ANARCHIST:
      return ANARCHISTS_ID;
    case COMMUNIST:
      return COMMUNISTS_ID;
    case MODERATE:
      return MODERATES_ID;
    default:
      throw new Error('Unknown player');
  }
}

function make_list(first: number, last: number) {
  let list = [];
  for (let i = first; i <= last; i++) list.push(i);
  return list;
}

function random(range: number): number {
  // An MLCG using integer arithmetic with doubles.
  // https://www.ams.org/journals/mcom/1999-68-225/S0025-5718-99-00996-5/S0025-5718-99-00996-5.pdf
  // m = 2**35 − 31
  return (game.seed = (game.seed * 200105) % 34359738337) % range;
}

function set_delete<T>(set: T[], item: T) {
  let a = 0;
  let b = set.length - 1;
  while (a <= b) {
    let m = (a + b) >> 1;
    let x = set[m];
    if (item < x) b = m - 1;
    else if (item > x) a = m + 1;
    else {
      array_remove(set, m);
      return;
    }
  }
}

// #endregion

// #region ARRAY

function array_remove<T>(array: T[], index: number) {
  let n = array.length;
  for (let i = index + 1; i < n; ++i) array[i - 1] = array[i];
  array.length = n - 1;
}

// function array_insert<T>(array: T[], index: number, item: T) {
//   for (let i = array.length; i > index; --i) array[i] = array[i - 1];
//   array[index] = item;
// }

// function array_remove_pair<T>(array: T[], index: number) {
//   let n = array.length;
//   for (let i = index + 2; i < n; ++i) array[i - 2] = array[i];
//   array.length = n - 2;
// }

// function array_insert_pair<K, V>(
//   array: (K | V)[],
//   index: number,
//   key: K,
//   value: V
// ) {
//   for (let i = array.length; i > index; i -= 2) {
//     array[i] = array[i - 2];
//     array[i + 1] = array[i - 1];
//   }
//   array[index] = key;
//   array[index + 1] = value;
// }

// #endregion