#!/usr/bin/env -S node

const sqlite3 = require("better-sqlite3")

let db = new sqlite3("db")

let select_game = db.prepare("select * from games where game_id=?")

let select_replay = db.prepare("select * from game_replay where game_id=?")
let delete_replay = db.prepare("delete from game_replay where game_id=?")
let insert_replay = db.prepare("insert into game_replay (game_id,replay_id,role,action,arguments) values (?,?,?,?,?)")

let delete_snap = db.prepare("delete from game_snap where game_id=?")
let insert_snap = db.prepare("insert into game_snap(game_id,snap_id,replay_id,state) values (?,?,?,?)")

let update_state = db.prepare("update game_state set state=? where game_id=?")
let update_active = db.prepare("update games set active=? where game_id=?")

let update_result = db.prepare("update games set status=?, result=? where game_id=?")

const CRC32C_TABLE = new Int32Array([
	0x00000000, 0xf26b8303, 0xe13b70f7, 0x1350f3f4, 0xc79a971f, 0x35f1141c, 0x26a1e7e8, 0xd4ca64eb,
	0x8ad958cf, 0x78b2dbcc, 0x6be22838, 0x9989ab3b, 0x4d43cfd0, 0xbf284cd3, 0xac78bf27, 0x5e133c24,
	0x105ec76f, 0xe235446c, 0xf165b798, 0x030e349b, 0xd7c45070, 0x25afd373, 0x36ff2087, 0xc494a384,
	0x9a879fa0, 0x68ec1ca3, 0x7bbcef57, 0x89d76c54, 0x5d1d08bf, 0xaf768bbc, 0xbc267848, 0x4e4dfb4b,
	0x20bd8ede, 0xd2d60ddd, 0xc186fe29, 0x33ed7d2a, 0xe72719c1, 0x154c9ac2, 0x061c6936, 0xf477ea35,
	0xaa64d611, 0x580f5512, 0x4b5fa6e6, 0xb93425e5, 0x6dfe410e, 0x9f95c20d, 0x8cc531f9, 0x7eaeb2fa,
	0x30e349b1, 0xc288cab2, 0xd1d83946, 0x23b3ba45, 0xf779deae, 0x05125dad, 0x1642ae59, 0xe4292d5a,
	0xba3a117e, 0x4851927d, 0x5b016189, 0xa96ae28a, 0x7da08661, 0x8fcb0562, 0x9c9bf696, 0x6ef07595,
	0x417b1dbc, 0xb3109ebf, 0xa0406d4b, 0x522bee48, 0x86e18aa3, 0x748a09a0, 0x67dafa54, 0x95b17957,
	0xcba24573, 0x39c9c670, 0x2a993584, 0xd8f2b687, 0x0c38d26c, 0xfe53516f, 0xed03a29b, 0x1f682198,
	0x5125dad3, 0xa34e59d0, 0xb01eaa24, 0x42752927, 0x96bf4dcc, 0x64d4cecf, 0x77843d3b, 0x85efbe38,
	0xdbfc821c, 0x2997011f, 0x3ac7f2eb, 0xc8ac71e8, 0x1c661503, 0xee0d9600, 0xfd5d65f4, 0x0f36e6f7,
	0x61c69362, 0x93ad1061, 0x80fde395, 0x72966096, 0xa65c047d, 0x5437877e, 0x4767748a, 0xb50cf789,
	0xeb1fcbad, 0x197448ae, 0x0a24bb5a, 0xf84f3859, 0x2c855cb2, 0xdeeedfb1, 0xcdbe2c45, 0x3fd5af46,
	0x7198540d, 0x83f3d70e, 0x90a324fa, 0x62c8a7f9, 0xb602c312, 0x44694011, 0x5739b3e5, 0xa55230e6,
	0xfb410cc2, 0x092a8fc1, 0x1a7a7c35, 0xe811ff36, 0x3cdb9bdd, 0xceb018de, 0xdde0eb2a, 0x2f8b6829,
	0x82f63b78, 0x709db87b, 0x63cd4b8f, 0x91a6c88c, 0x456cac67, 0xb7072f64, 0xa457dc90, 0x563c5f93,
	0x082f63b7, 0xfa44e0b4, 0xe9141340, 0x1b7f9043, 0xcfb5f4a8, 0x3dde77ab, 0x2e8e845f, 0xdce5075c,
	0x92a8fc17, 0x60c37f14, 0x73938ce0, 0x81f80fe3, 0x55326b08, 0xa759e80b, 0xb4091bff, 0x466298fc,
	0x1871a4d8, 0xea1a27db, 0xf94ad42f, 0x0b21572c, 0xdfeb33c7, 0x2d80b0c4, 0x3ed04330, 0xccbbc033,
	0xa24bb5a6, 0x502036a5, 0x4370c551, 0xb11b4652, 0x65d122b9, 0x97baa1ba, 0x84ea524e, 0x7681d14d,
	0x2892ed69, 0xdaf96e6a, 0xc9a99d9e, 0x3bc21e9d, 0xef087a76, 0x1d63f975, 0x0e330a81, 0xfc588982,
	0xb21572c9, 0x407ef1ca, 0x532e023e, 0xa145813d, 0x758fe5d6, 0x87e466d5, 0x94b49521, 0x66df1622,
	0x38cc2a06, 0xcaa7a905, 0xd9f75af1, 0x2b9cd9f2, 0xff56bd19, 0x0d3d3e1a, 0x1e6dcdee, 0xec064eed,
	0xc38d26c4, 0x31e6a5c7, 0x22b65633, 0xd0ddd530, 0x0417b1db, 0xf67c32d8, 0xe52cc12c, 0x1747422f,
	0x49547e0b, 0xbb3ffd08, 0xa86f0efc, 0x5a048dff, 0x8ecee914, 0x7ca56a17, 0x6ff599e3, 0x9d9e1ae0,
	0xd3d3e1ab, 0x21b862a8, 0x32e8915c, 0xc083125f, 0x144976b4, 0xe622f5b7, 0xf5720643, 0x07198540,
	0x590ab964, 0xab613a67, 0xb831c993, 0x4a5a4a90, 0x9e902e7b, 0x6cfbad78, 0x7fab5e8c, 0x8dc0dd8f,
	0xe330a81a, 0x115b2b19, 0x020bd8ed, 0xf0605bee, 0x24aa3f05, 0xd6c1bc06, 0xc5914ff2, 0x37faccf1,
	0x69e9f0d5, 0x9b8273d6, 0x88d28022, 0x7ab90321, 0xae7367ca, 0x5c18e4c9, 0x4f48173d, 0xbd23943e,
	0xf36e6f75, 0x0105ec76, 0x12551f82, 0xe03e9c81, 0x34f4f86a, 0xc69f7b69, 0xd5cf889d, 0x27a40b9e,
	0x79b737ba, 0x8bdcb4b9, 0x988c474d, 0x6ae7c44e, 0xbe2da0a5, 0x4c4623a6, 0x5f16d052, 0xad7d5351
])

function crc32c(data) {
	let x = 0
	for (let i = 0, n = data.length; i < n; ++i)
		x = CRC32C_TABLE[(x ^ data.charCodeAt(i)) & 0xff] ^ (x >>> 8)
	return x ^ -1
}

function snapshot(state) {
	let save_undo = state.undo
	let save_log = state.log
	state.undo = undefined
	state.log = save_log.length
	let snap = JSON.stringify(state)
	state.undo = save_undo
	state.log = save_log
	return snap
}

function is_valid_action(rules, state, role, action, arg) {
	if (action === "undo") // for jc, hots, r3, and cr compatibility
		return true
	if (state.active !== role && state.active !== "Both")
		return false
	let view = rules.view(state, role)
	let va = view.actions[action]
	if (va) {
		if (Array.isArray(arg))
			arg = arg[0]
		if (Array.isArray(va) && va.includes(arg))
			return true
		if (arg === undefined || arg === null || arg === 1)
			return (va === 1 || va === true || typeof va === "string")
	}
	return false
}

function dont_snap(rules, state, old_active) {
	if (state.state === "game_over")
		return true
	if (state.active === old_active)
		return true
	if (rules.dont_snap && rules.dont_snap(state))
		return true
	return false
}

function patch_game(game_id, {validate_actions=true, save_snaps=true, delete_undo=false, delete_invalid=false}, verbose) {
	let game = select_game.get(game_id)
	if (!game) {
		console.error("game not found:", game_id)
		return
	}

	let title_id = game.title_id
	let rules = require("../public/" + title_id + "/rules.js")

	let replay = select_replay.all(game_id)
	if (replay.length === 0)
		return

	console.log("processing", game_id, title_id)

	try {
		let state = null
		let old_active = null
		let need_to_rewrite = false

		for (let i = 0; i < replay.length; ++i) {
			let item = replay[i]

			if (verbose)
				console.log(item.replay_id, item.role, item.action, item.arguments)

			let args = JSON.parse(item.arguments)
			switch (item.action) {
			case ".setup":
				state = rules.setup(...args)
				break
			case ".resign":
				state = rules.resign(state, item.role)
				break
			default:
				if (validate_actions) {
					if (!is_valid_action(rules, state, item.role, item.action, args)) {
						console.error(`invalid action: ${item.role} ${item.action} ${item.arguments}`)
						console.error("\t", state.state, state.active, JSON.stringify(rules.view(state, item.role).actions))
						if (i < replay.length) {
							console.log("BROKEN ENTRIES: %d", replay.length-i)
							console.log(`sqlite3 db "delete from game_replay where game_id=${game_id} and replay_id>=${replay[i].replay_id}"`)
						}
						throw "invalid action"
					}
				}
				state = rules.action(state, item.role, item.action, args)
				break
			}

			item.state = snapshot(state)
			item.checksum = crc32c(item.state)
			if (!dont_snap(rules, state, old_active))
				item.save = 1
			old_active = state.active

			if (delete_undo) {
				if (item.action === "undo") {
					for (let k = i-1; k >= 0; --k) {
						if (replay[k].checksum === item.checksum) {
							need_to_rewrite = true
							for (let z = k+1; z <= i; ++z)
								replay[z].remove = 1
							break
						}
					}
				}
			}
		}

		db.exec("begin")

		if (need_to_rewrite) {
			delete_replay.run(game_id)
			for (item of replay)
				if (!item.remove)
					insert_replay.run(game_id, item.replay_id, item.role, item.action, item.arguments)
		}

		if (save_snaps) {
			delete_snap.run(game_id)
			let snap_id = 0
			for (item of replay)
				if (item.save)
					insert_snap.run(game_id, ++snap_id, item.replay_id, item.state)
		}

		update_active.run(state.active, game_id)
		update_state.run(JSON.stringify(state), game_id)

		if (state.state === "game_over")
			update_result.run(2, state.result, game_id)
		else
			update_result.run(1, null, game_id)

		db.exec("commit")

	} catch (err) {
		if (err !== "invalid action")
			console.error("ERROR", game_id, title_id, err)
		if (delete_invalid) {
			delete_replay.run(game_id)
			delete_snap.run(game_id)
		}
	}
}

function patch_all(options) {
	for (let game_id of db.prepare("select game_id from games where status=1").pluck().all())
		patch_game(game_id, options, false)
}

function patch_title(title_id, options) {
	for (let game_id of db.prepare("select game_id from games where status=1 and title_id=?").pluck().all(title_id))
		patch_game(game_id, options, false)
}

if (process.argv.length < 3) {
	process.stderr.write("usage: ./tools/patchgame.js <game_id> '{options}'\n")
	process.stderr.write("   or: ./tools/patchgame.js <title_id> '{options}'\n")
	process.stderr.write("   or: ./tools/patchgame.js all '{options}'\n")
	process.stderr.write('options: { "validate_actions":true, "delete_invalid":false, "save_snaps":true, "delete_undo":false }\n')
	process.exit(1)
}

let options = {}
if (process.argv.length === 4)
	options = JSON.parse(process.argv[3])

if (process.argv[2] === 'all')
	patch_all(options)
else if (isNaN(process.argv[2]))
	patch_title(process.argv[2], options)
else
	patch_game(parseInt(process.argv[2]), options, true)