const Command = require('../../structures/Command');
const BombSweeper = require('bombsweeper.js');
const moment = require('moment');
require('moment-duration-format');
const { stripIndents } = require('common-tags');
const { removeFromArray, verify, fetchHSUserDisplay } = require('../../util/Util');
const nums = ['1️⃣', '2️⃣', '3️⃣', '4️⃣', '5️⃣', '6️⃣', '7️⃣', '8️⃣', '9️⃣', '🔟'];
const turnRegex = /^(flag )?(\d+), ?(\d+)/i;

module.exports = class MinesweeperCommand extends Command {
	constructor(client) {
		super(client, {
			name: 'minesweeper',
			aliases: ['bombsweeper', 'mines', 'bombs', 'msweeper', 'minesweep', 'msweep'],
			group: 'games-sp',
			memberName: 'minesweeper',
			description: 'Play a game of Minesweeper.',
			args: [
				{
					key: 'size',
					prompt: 'What size board do you want to use?',
					type: 'integer',
					default: 9,
					max: 10,
					min: 3
				}
			]
		});
	}

	async run(msg, { size }) {
		const current = this.client.games.get(msg.channel.id);
		if (current) return msg.reply(`Please wait until the current game of \`${current.name}\` is finished.`);
		try {
			const game = new BombSweeper(size, size);
			this.client.games.set(msg.channel.id, { name: this.name, data: game });
			game.PlaceBombs(size + 1); // eslint-disable-line new-cap
			let win = null;
			game.onWin = () => { win = true; };
			game.onLoss = () => { win = false; };
			const flagged = [];
			const startTime = new Date();
			let cheatMode = false;
			while (win === null) {
				const currentTime = moment.duration(new Date() - startTime).format('mm:ss');
				await msg.say(stripIndents`
					${msg.author}, what coordinates do you pick (ex. 4,5)? Type \`end\` to forefeit.
					Type \`flag <coordinates>\` to flag a spot as a bomb. To remove a flag, run it again.

					${this.displayBoard(game.board, game.mask, flagged, cheatMode)}
					**Total Mines:** ${size + 1} | **Flagged:** ${flagged.length} | **Time:** ${currentTime}
				`);
				const filter = res => {
					if (res.author.id !== msg.author.id) return false;
					const pick = res.content;
					if (pick.toLowerCase() === 'xyzzy' && !cheatMode) return true;
					if (pick.toLowerCase() === 'end') return true;
					const coordPicked = pick.match(turnRegex);
					if (!coordPicked) return false;
					const x = Number.parseInt(coordPicked[2], 10);
					const y = Number.parseInt(coordPicked[3], 10);
					if (x > size || y > size || x < 1 || y < 1) return false;
					if (game.mask[y - 1][x - 1]) return false;
					return true;
				};
				const turn = await msg.channel.awaitMessages(filter, {
					max: 1,
					time: 120000
				});
				if (!turn.size) {
					await msg.say('Sorry, time is up!');
					break;
				}
				const choice = turn.first().content;
				if (choice.toLowerCase() === 'end') {
					win = false;
					break;
				}
				if (choice.toLowerCase() === 'xyzzy') {
					cheatMode = true;
					await msg.say('Cheat mode is now active. No high score will be saved.');
					continue;
				}
				const coordPicked = choice.match(turnRegex);
				const x = Number.parseInt(coordPicked[2], 10);
				const y = Number.parseInt(coordPicked[3], 10);
				const flag = Boolean(coordPicked[1]);
				if (flag) {
					if (flagged.includes(`${x - 1},${y - 1}`)) {
						removeFromArray(flagged, `${x - 1},${y - 1}`);
					} else {
						flagged.push(`${x - 1},${y - 1}`);
					}
				} else {
					if (flagged.includes(`${x - 1},${y - 1}`)) {
						await msg.say('Are you sure you want to check this spot? You have it flagged.');
						const verification = await verify(msg.channel, msg.author);
						if (!verification) {
							await msg.say('Okay, the spot will remain unchecked.');
							continue;
						}
					}
					game.CheckCell(x - 1, y - 1); // eslint-disable-line new-cap
					if (win === true || win === false) break;
				}
			}
			const newScore = Date.now() - startTime;
			const highScoreGet = await this.client.redis.get(`minesweeper-${size}`);
			const highScore = highScoreGet ? Number.parseInt(highScoreGet, 10) : null;
			const highScoreUser = await this.client.redis.get(`minesweeper-${size}-user`);
			const scoreBeat = !cheatMode && win && (!highScore || highScore > newScore);
			const user = await fetchHSUserDisplay(this.client, highScoreUser);
			if (scoreBeat) {
				await this.client.redis.set(`minesweeper-${size}`, newScore);
				await this.client.redis.set(`minesweeper-${size}-user`, msg.author.id);
			}
			this.client.games.delete(msg.channel.id);
			if (win === null) return msg.say('Game ended due to inactivity.');
			const newDisplayTime = moment.duration(newScore).format('mm:ss');
			const displayTime = moment.duration(highScore).format('mm:ss');
			return msg.say(stripIndents`
				${win ? `Nice job! You win! (Took ${newDisplayTime})` : 'Sorry... You lose.'}
				${scoreBeat ? `**New High Score!** Old:` : `High Score:`} ${displayTime} (Held by ${user})

				${this.displayBoard(game.board)}
			`);
		} catch (err) {
			this.client.games.delete(msg.channel.id);
			throw err;
		}
	}

	displayBoard(board, mask, flagged, cheatMode = false) {
		let str = '';
		str += '⬛';
		str += nums.slice(0, board.length).join('');
		str += '\n';
		for (let i = 0; i < board.length; i++) {
			str += nums[i];
			board[i].forEach((item, j) => {
				if (cheatMode && item === '*') {
					str += '💣';
				} else if (!mask || mask[i][j]) {
					if (item === '*') {
						str += '💣';
					} else if (item === 0) {
						str += '⬜';
					} else {
						str += nums[item - 1];
					}
				} else if (flagged.includes(`${j},${i}`)) {
					str += '🚩';
				} else {
					str += '❓';
				}
			});
			str += '\n';
		}
		return str;
	}
};