//Start of the file

module.exports = {
    name: 'randomwinner',
    description: "This is a random winner command. Pull a random winner from the reactions!",

    execute(message, args, Discord, client) {
        //This command only to be used with role named 'Moderator'
        if (message.member.roles.cache.some(role => role.name === 'Management')) {
            if (!args.length) {
                return message.channel.send(`You didn't provide any arguments, ${message.author}!`);
            }
            numWinners = args[0];
            //console.log('This is the number of Winners:');
            //console.log(numWinners);
            //console.log('------------------------------');
            //console.log('This is the emojicode pre-fix : ' + args[1])
            var emojiCode = args[1].split(':')[2];
            //console.log('This is the emoji code after the first split : ' + emojiCode);
            emojiCode = emojiCode.replace('>', '');
            //console.log('This is the emoji code for the emoji you will track');
            //console.log(emojiCode);

            message.channel.messages.fetch().then(async messages => {
                for (const msg of messages.array()) {
                    resultIndex = msg.reactions.cache.map((value, index) => index);
                    resultCount = msg.reactions.cache.map((value, index) => value.count);
                    var selIndex = -1;
                    var numVotes = 0;
                    for (var i = 0; i < resultIndex.length; i++) {
                        if (resultIndex[i] == emojiCode) {
                            selIndex = i;
                            break;
                        }
                    }
                    if (selIndex != -1) {
                        numVotes = resultCount[selIndex];
                        //console.log("number of reactions: " + numVotes);
                        msg.reactions.resolve(emojiCode).users.fetch().then(x => {
                            userList = x.map((value, index) => value);
                            //console.log(userList[0].username);
                            //console.log('----------');
                            //console.log(userList.length);
                            //console.log(userList)

                            const newWinnerEmbed = new Discord.MessageEmbed()
                                .setColor('#304281')
                                .setTitle("Contest Entries")
                                .setDescription('These are the winners of the contest! Congratulations!')
                                .setFooter('Work for this command has been done by [EB]EternalFragment#5420 and AmeiLotus')

                            var d = [];
                            for (z = 0; z < numWinners; z++) {
                                generateUniqueRandom(numWinners);
                            }
                            //console.log('Unique random numbers:' , haveIt);

                            for (z = 0; z < numWinners; z++) {
                                newWinnerEmbed.addFields({ name: "Winner #" + (z + 1) + " - ", value: '<@' + userList[haveIt[z]] + '>' })
                            }

                            message.channel.send(newWinnerEmbed);

                            //resets the haveIt array for new commands.
                            haveIt = [];
                        });
                    }

                }
            }); //finish messages fetch .then
        } else {
            message.channel.send("You don't have the role");
        }

    } //end of execute function
}// end of module.export

// START UNIQUE NUMBER GENERATOR.
// MAKE SURE TO CLEAR IT AFTER YOUR COMMAND IS OVER USING `haveIt = [];`
let haveIt = [];

function generateUniqueRandom(maxNr) {
    //Generate random number
    let random = (Math.random() * (maxNr - 1)).toFixed();

    //Coerce to number by boxing
    random = Number(random);

    if (!haveIt.includes(random)) {
        haveIt.push(random);
        return random;
    } else {
        if (haveIt.length < maxNr) {
            //Recursively generate number
            return generateUniqueRandom(maxNr);
        } else {
            console.log('No more numbers available.')
            return false;
        }
    }
}