// @ts-check

const { MongoClient, ServerApiVersion } = require('mongodb');
let ecoimport = require("./econ.js");
let { handle } = require("./battle.js"); //PROBLEM (CIRCULAR DEPENDANCY)
let snowflake = require("./addons/snowflake.js");
const STATE = ecoimport.STATE;
const BASE = ecoimport.BASE;

const { winGame, loseGame } = require('./external_game_functions.js');

//Has a list of all games (used to change player state)
const allGames = ['battle'];
// const { NULL } = require('mysql/lib/protocol/constants/types');


//#region functions (NOT GAME SPECIFIC)

/** Adds the game type tag to the user(s) so the system can tell what game they're playing
 * @param other_dbo optional, include if the game has two players
*/
async function Initialize(bot, user_dbo, command, message, first, second, other_dbo = null) {
    return new Promise(async function(resolve, reject) {
        user_dbo.find({"game": {$exists: true}}).toArray(function(err, docs){
            let doc = docs[0];
            if (allGames.indexOf(command) != -1) {
                if (other_dbo != null) {
                    user_dbo.updateOne( { "game": {$exists: true} }, { $set: { game: command, opponent: other_dbo.s.namespace.collection, state: STATE.FIGHTING }});
                    other_dbo.updateOne({ "game": {$exists: true} }, { $set: { game: command, opponent: user_dbo.s.namespace.collection, state: STATE.FIGHTING }});
                } else {
                    user_dbo.updateOne({ "game": {$exists: true} }, { $set: { game: command, state: STATE.FIGHTING }});
                }

            } else { message.reply(`ERROR! ${command} IS NOT A GAME!`); }
        });

        //Create a new thread for the game (maybe uneccesary???) - done before initialize
        let name_first = await bot.users.cache.get(first);
        let name_second = await bot.users.cache.get(second);

        // message.reply(`${first} [${name_first}], ${second} [${name_second}]`); throw 'ERR';
        const threadname = `${name_first.username} VS ${name_second.username} [${command.toUpperCase()}]`;

        const thread = await message.channel.threads.create({
            name: threadname,
            // type: 'GUILD_PRIVATE_THREAD',
            autoArchiveDuration: 60,
            reason: `N/A`,
        });
        
        //Need lvl 2 boost for this
        // thread.add(first);
        // thread.add(second);

        message.channel.send(`<@${first}> and <@${second}> have started a game of ***${command.toUpperCase()}!***`);

        resolve(thread);
    });
}

//#endregion

//replies to the message with current game specifics
function getGame(message, args, db) {
    let id;
    var temp;

    if (args.length == 1 && String(args[0]).startsWith('<')) { id = args[0].substr(2, args[0].length - 3)}
    else { id = message.author.id; }
    var user_dbo = db.collection(message.author.id);

    user_dbo.find({"game": {$exists: true}}).toArray(function(err, docs){
        const doc = docs[0];
        if (doc.game == null) {
            return message.reply(`<@${id}> is not currently playing a game!`);
        }

        temp = `<@${id}> is currently playing "${doc.game}"`;

        if (doc.opponent != null) {
            temp += ` with <@${doc.opponent}>`
        }

        message.reply(temp);
    });
}

function acceptIsValid(bot, other_discord, message, msg, tag_len) {

    if (other_discord == undefined) {
        message.reply("This is not a valid invite!");
        return false;
    }

    //Make sure the bot was the one creating the invite
    let check0 = msg.author.bot;

    //Author
    let tag = msg.content.substr(2, tag_len);
    let check1 = Number(tag) == Number(message.author.id);

    //Time (within the last 5 min)
    let prev = snowflake.convertSnowflakeToDate(msg.id);
    let now = snowflake.convertSnowflakeToDate(message.id);
    // @ts-ignore
    let diff = now - prev;
    var minutes = Math.floor((diff/1000)/60);
    let check2 = minutes <= 5 || bot.inDebugMode;

    if (!check0) { message.reply("really?"); }
    else if (!check1 && check2) { message.reply("_INVALID USER_"); }
    else if (check1 && !check2) { message.reply("_THIS INVITE EXPIRED!_"); }
    else if (!check1 && !check2) { message.reply("_THIS MESSAGE HAS AN INVALID USER AND HAS EXPIRED_")}

    return (check0 && check1 && check2);
}


function hpmp(message, command, dbo) {
    // throw 'THIS HAS NOT BEEN UPDATED WITH THE MOST RECENT VERSION OF THE MONGODB STRUCTURE!';
    if (command == 'hp') {
        dbo.find({"hpmp": {$exists: true}}).toArray(function(err, doc) {
            return message.reply(`You have ${String(doc[0].hpmp.hp)} hp left!`);
        });
    } else if (command == 'mp') { 
        dbo.find({"hpmp": {$exists: true}}).toArray(function(err, doc) {
            return message.reply(`You have ${String(doc[0].hpmp.hp)} mp left!`);
        });
    }
}


function equip(client, message, command, dbo, bot) {
    //Check if the user is already in a game
    
}

//#endregion


//#region GAME SPECIFIC
function in_game_redirector(bot, interaction, threadname, doc, client, mongouri, items, xp_collection) {

    //Maybe fix this later......
    let turn = doc.turn;
    const user1 = doc[turn];
    const user2 = doc[Number(!turn)];
    const db = client.db(interaction.guildId + "[ECON]");
    const dbo = db.collection(user1);
    const other = db.collection(user2);
    const thread = interaction.channel;

    dbo.find({'game': {$exists: true}}).toArray(function (err, docs) {
        const game = docs[0].game
        switch (game) {
            case 'battle': handle(client, dbo, other, bot, thread, interaction.customId.toLowerCase(), mongouri, items, interaction, xp_collection);
        }
    });
}


module.exports ={
    name: "game",
    description: "Play a game using Selmer Bot!",
    async execute(bot, message, args, command, Discord, mongouri, items, xp_collection) {

        if (!bot.inDebugMode) { return message.reply("This command is currently in development!"); }


//#region Setup
        const id = message.author.id;
        const server = message.guild.id;

        // @ts-ignore
        const client = new MongoClient(mongouri, { useNewUrlParser: true, useUnifiedTopology: true, serverApi: ServerApiVersion.v1 });
        if (client.writeConcern || client.writeConcern) { 
            client.close();
            return message.reply("Something went wrong with the database, please try again later and contact support if this problem persists!");
        }
        
        const botdb = client.db('B|S' + bot.user.id);
        const serverinbotdb = botdb.collection(server);

        //Initialize if necessary
        ecoimport.CreateNewCollection(message, client, server, id);
        command = args[0];

        //Check for a second person and create a second database entry if neccessary
        if (message.mentions.users.first() != undefined) {
//#TODO     //FIX THIS (NOT THE RIGHT CLIENT 100% OF THE TIME!!!!!!!)
            ecoimport.CreateNewCollection(message, client, server, message.mentions.users.first().id);
        }

//#endregion

        client.connect(err => {
            const db = client.db(String(server) + "[ECON]");
            const dbo = db.collection(id);
            if (err) { return console.log(err); }

            //Check if the client is currently in a game and act accordingly
//#region Check Game
            dbo.find({"game": {$exists: true}}).toArray(async function(err, docs){
                if (err) { return console.log(err); }
                let doc = docs[0];
                let game = null;
                if (doc) { game = doc.game; }
//#endregion

//#region non-game-specific commands
                //For TWO+ PLAYER games only!!!
                if (command == 'accept') {
                    //Handle the messages
                    if (message.reference == null) { return message.reply("Please reply to a valid battle request message!"); }
                    let mid = message.reference.messageId;
                    let msg = await message.channel.messages.fetch(mid);

                    //Check if the person actually challenged you
                    //Get the length of any user tag
                    let mentioned = msg.mentions.users.keys();

                    let tag_len = String(mentioned.next().value).length;

                    //<@tage_len>, <@  --2+tag_len+2+3 = 7+tag_len
                    let other_tag = msg.content.substr(7+tag_len, tag_len);
                    
                    const other_discord = msg.mentions.users.get(other_tag);

                    //Should also check if the player is already playing a game!!!
                    if (!acceptIsValid(bot, other_discord, message, msg, tag_len)) { return; }

                    //Get the opponent
                    const other = db.collection(other_discord.id);
                    let startPos = msg.content.indexOf('"') + 1;
                    let newCommand = msg.content.substr(startPos, msg.content.lastIndexOf('"') - startPos);


                    //#region BOT SECTION

                    //Store both IDs in the database (for turns)
                    let name_first = await bot.users.cache.get(id);
                    let name_second = await bot.users.cache.get(other_discord.id);

                    // message.reply(`${first} [${name_first}], ${second} [${name_second}]`); throw 'ERR';
                    const threadname = `${name_first.username} VS ${name_second.username} [${newCommand.toUpperCase()}]`;
                    var newObj = {0: id, 1: other_discord.id, turn: 0, thread: threadname};
                    serverinbotdb.insertOne(newObj);

                    //#endregion


                    if (newCommand == 'battle') {
                        const result = Initialize(bot, dbo, newCommand, msg, id, other_discord.id, other);
                        result.then(function (thread) {
                            handle(client, dbo, other, bot, thread, 'initalize', mongouri, items, null, xp_collection);
                        });
                    }
                } else if (command == 'quit') {

                    const channel = bot.channels.cache.get(message.channel.parentId);
                    //Remove the turn counter from the bot's database
                    serverinbotdb.deleteOne({0: id} || {1: id});
                    if (doc.opponent != null) {
                        // let other = message.guild.members.cache.get(doc.opponent);
                        let other = db.collection(doc.opponent);
                        channel.send(`<@${message.author.id}> has quit a game of "${game}" with <@${doc.opponent}>!`);
                        winGame(client, bot, db, other, xp_collection, message);
                    } else {
                        loseGame(dbo, xp_collection, message, bot);
                        channel.send(`<@${message.author.id}> has quit a game of "${game}"!`);
                    }
                }
                else if (command == 'status') {
                    getGame(message, args, db);
                } else if (command == 'hp' || command == 'mp') {
                    hpmp(message, command, dbo);
                }
//#endregion

//#region game-specific commands
                else {
                    if (game == 'battle' || command == 'battle') {
                        //Handle sending the request and making sure the user exists here
                        let other_discord = message.mentions.users.first();
                        if (other_discord == undefined) {
                            return message.reply(`${args[1]} is not a valid user!`);
                        }
                        
                        message.channel.send(`${other_discord}, <@${message.author.id}> has invited you to play "battle", to accept, please reply to this message with _!game accept_`);
                    }

                    //Catch statement (invalid command)
                    else {
                        if (command == undefined) { message.reply("Please specify a game or use _!game help_"); }
                        else { message.reply(`'!game ${command}' is not a command!`); }
                    }
                }
//#endregion

            });
        });

        client.close();
    }, allGames, in_game_redirector
}