const Jimp = require('jimp');
const diff = require('color-diff');
const twemoji = require('twemoji');

emojiRgb = [
    {R: 255, G: 255, B: 255, E: ":white_large_square:"},    // white
    {R: 0, G: 0, B: 0, E: ":black_large_square:"},          // black
    {R: 255, G: 0, B: 0, E: ":red_circle:"},                // red
    {R: 0, G: 255, B: 0, E: ":green_heart:"},               // green
    {R: 0, G: 0, B: 255, E: ":blue_heart:"},                // blue
    {R: 253, G: 203, B: 88, E: ":yellow_heart:"},           // yellow
    {R: 154, G: 78, B: 28, E: ":briefcase:"},               // brown
    {R: 102, G: 117, B: 127, E: ":new_moon:"},              // gray
    {R: 146, G: 102, B: 204, E: ":star_of_david:"},         // purple
    {R: 89, G: 142, B: 60, E: ":green_apple:"},             // pepe green
    {R: 92, G: 172, B: 235, E: ":large_blue_circle:"}       // joy emoji tears blue
    //{R: 255, G: 255, B: 255, E: ""},
    //{R: 255, G: 255, B: 255, E: ""},
    //{R: 255, G: 255, B: 255, E: ""},
];

exports.execute = (client, message, args) => {
    if(args.length < 2){
        message.channel.send(":warning: Need one argument. A custom emoji or image url.");
        return;
    }

    // try arg as emoji
    var emojiName = args[1].split(":")[1];  // only get ID part from emoji
    var emoji = client.emojis.find(e => e.name == emojiName);

    var url = "";

    if(!emoji){
        // check if image is url
        if(args[1].endsWith(".png") || args[1].endsWith(".jpg")){
            url = args[1];
        }else{
            // try use twemoji if it's a default emoji
            var text = twemoji.parse(args[1]);
            if(!text.startsWith("<img")){
                message.channel.send("Error. Only works with custom emojis from this guild / default emojis / png or jpg urls.");
                return;
            }
            var pos = text.indexOf("src");
            text = text.substring(pos + 5);
            text = text.substring(0, text.length - 3);
            url = text;
        }
    }

    // print image if it was an emoji
    if(url == ""){
        url = emoji.url;
        message.channel.send(url);
    }else{
        message.channel.send("==========");
    }

    var palette = [];
    for(var i = 0; i < emojiRgb.length; i++){
        var obj = {
            R: emojiRgb[i].R,
            G: emojiRgb[i].G,
            B: emojiRgb[i].B,
        }
        palette.push(obj);
    }
    var transColors = [];

    var imgName = "images/emoji.png";

    Jimp.read(url, (err, img) => {
        if(err){
            message.channel.send("Error. Could not read image.");
            return;
        }
        img
            .resize(30, 30)
            .write(imgName, () => {
                // todo maybe dont re-read image
                Jimp.read(imgName, (err, img) => {
                    if(err) throw err;
                    for(var i = 0; i < 30; i++){
                        for(var j = 0; j < 30; j++){
                            var hex = img.getPixelColor(j, i);
                            var rgb = Jimp.intToRGBA(hex);
                            var color = {
                                R: rgb.r,
                                G: rgb.g,
                                B: rgb.b
                            };
                            transColors.push(diff.closest(color, palette));
                        }
                    }

                    // get emoji name for every RGB value
                    var results = [];
                    for(var i = 0; i < transColors.length; i++){
                        var e2 = Object.values(transColors[i]);

                        for(var j = 0; j < emojiRgb.length; j++){
                            var e1 = Object.values(emojiRgb[j]).slice(0, -1);
                            var e3 = false;
                            if(e1[0] == e2[0] && e1[1] == e2[1] && e1[2] == e2[2]) e3 = true;

                            if(e3){
                                results.push(emojiRgb[j].E);
                                break;
                            }
                        }
                    }

                    // print emojis some lines at a time
                    for(var mul = 0; mul < 10; mul++){
                        var string1 = "";
                        var string2 = "";
                        var string3 = "";
                        var base = 90 * mul;

                        for(var i = 0; i < 30; i++){
                            string1 += results[i + base];
                            string2 += results[i + 30 + base];
                            string3 += results[i + 60 + base];
                        }

                        message.channel.send(string1 + "\n" + string2 + "\n" + string3);
                    }

                });
            });
    });
};

exports.info = {
    name: "emoji",
    alias: ["e"],
    permission: "default",
    type: "fun",
    guildOnly: true,    // maybe not? todo check later
	help: "Print a big pixeled emoji made of small emojis :3"
};