import Discord,{EmbedBuilder, SlashCommandBuilder} from 'discord.js';
import { TClient } from 'src/client';
import MPDB from '../models/MPServer';

async function MPdata(client:TClient, interaction:Discord.ChatInputCommandInteraction, embed: EmbedBuilder) {
    let FSserver;
    MPDB.sync();
    const newServerId = interaction.guildId;
    const ServerURL = await MPDB.findOne({where: { serverId: newServerId }});
    const DBURL = ServerURL.ip
    const DBCode = ServerURL.code
    const verifyURL = DBURL.match(/http/)
    const completedURL = DBURL + '/feed/dedicated-server-stats.json?code=' + DBCode
    if (!verifyURL) return interaction.reply(`No gameserver found, please contact <@&${client.config.mainServer.roles.mpmanager}> to update it.`)

    // Fetch dss
    try {
        FSserver = await client.axios.get(completedURL, {timeout: 2800}) // 2800 seems doable with database latency added to it.
    } catch(err) {
        // Blame Nawdic & RedRover92
        embed.setTitle('Host is not responding.');
        embed.setColor(client.config.embedColorRed);
        interaction.reply({embeds: [embed]});
        console.log('dag mp fail to fetch, host is not responding.');
        return;
    }
    return FSserver
}

export default {
    async run(client: TClient, interaction: Discord.ChatInputCommandInteraction<'cached'>){
        if (interaction.channelId == '468835769092669461' && !client.isStaff(interaction.member) && ['status', 'players'].includes(interaction.options.getSubcommand())) {
            interaction.reply(`Please use <#739084625862852715> for \`/mp status/players\` commands to prevent clutter in this channel.`).then((msg)=>{
                setTimeout(()=>{interaction.deleteReply()}, 500)
            });
            return;
        }
        const Subb = interaction.options.getSubcommand();
        switch (Subb){
            case 'status':
                const embed0 = new client.embed();
                const FSserver0 = await MPdata(client, interaction, embed0);
                if (FSserver0.data.server.name.length > 1) {
                    embed0.setTitle('Status/Details').setColor(client.config.embedColor).addFields(
                        {name: 'Server name', value: `${FSserver0?.data.server.name.length == 0 ? '\u200b' : `\`${FSserver0?.data.server.name}\``}`, inline: true},
                        {name: 'Players', value: `${FSserver0.data.slots.used} out of ${FSserver0.data.slots.capacity}`, inline: true},
                        {name: 'Current map', value: `${FSserver0?.data.server.mapName.length == 0 ? '\u200b' : FSserver0.data.server.mapName}`, inline: true},
                        {name: 'Version', value: `${FSserver0?.data.server.version.length == 0 ? '\u200b' : FSserver0.data.server.version}`, inline: true},
                        {name: 'In-game Time', value: `${('0' + Math.floor((FSserver0.data.server.dayTime/3600/1000))).slice(-2)}:${('0' + Math.floor((FSserver0.data.server.dayTime/60/1000)%60)).slice(-2)}`, inline: true}
                    )
                }
                interaction.reply({embeds: [embed0]})
                break;
            case 'players':
                const embed1 = new client.embed();
                const data = require('../database/MPPlayerData.json').slice(-60)

                // handle negative days
                data.forEach((change: number, i: number) => {
                    if (change < 0) data[i] = data[i - 1] || data[i + 1] || 0;
                });

                const first_graph_top = 16;

                const second_graph_top = 16;
            
                const textSize = 40;
            
                const canvas = require('canvas');
                const img = canvas.createCanvas(1500, 750);
                const ctx = img.getContext('2d');
            
                const graphOrigin = [15, 65];
                const graphSize = [1300, 630];
                const nodeWidth = graphSize[0] / (data.length - 1);
                ctx.fillStyle = '#36393f';
                ctx.fillRect(0, 0, img.width, img.height);
            
                // grey horizontal lines
                ctx.lineWidth = 5;
            
                let interval_candidates = [];
                for (let i = 4; i < 10; i++) {
                    const interval = first_graph_top / i;
                    if (Number.isInteger(interval)) {
                        let intervalString = interval.toString();
                        const reference_number = i * Math.max(intervalString.split('').filter(x => x === '0').length / intervalString.length, 0.3) * (['1', '2', '4', '5', '6', '8'].includes(intervalString[0]) ? 1.5 : 0.67)
                        interval_candidates.push([interval, i, reference_number]);
                    }
                }
                const chosen_interval = interval_candidates.sort((a, b) => b[2] - a[2])[0];
            
                const previousY: Array<number> = [];
            
                ctx.strokeStyle = '#202225';
                for (let i = 0; i <= chosen_interval[1]; i++) {
                    const y = graphOrigin[1] + graphSize[1] - (i * (chosen_interval[0] / second_graph_top) * graphSize[1]);
                    if (y < graphOrigin[1]) continue;
                    const even = ((i + 1) % 2) === 0;
                    if (even) ctx.strokeStyle = '#2c2f33';
                    ctx.beginPath();
                    ctx.lineTo(graphOrigin[0], y);
                    ctx.lineTo(graphOrigin[0] + graphSize[0], y);
                    ctx.stroke();
                    ctx.closePath();
                    if (even) ctx.strokeStyle = '#202225';
                    previousY.push(y, i * chosen_interval[0]);
                }
            
                // 30m mark
                ctx.setLineDash([8, 16]);
                ctx.beginPath();
                const lastMonthStart = graphOrigin[0] + (nodeWidth * (data.length - 60));
                ctx.lineTo(lastMonthStart, graphOrigin[1]);
                ctx.lineTo(lastMonthStart, graphOrigin[1] + graphSize[1]);
                ctx.stroke();
                ctx.closePath();
                ctx.setLineDash([]);
            
                // draw points
                ctx.lineWidth = 5;
            
            
                function getYCoordinate(value: number) {
                    return ((1 - (value / second_graph_top)) * graphSize[1]) + graphOrigin[1];
                }

                function colorAtPlayercount(playercount: number) {
                    if (playercount === first_graph_top) {
                        return client.config.embedColorRed;
                    } else if (playercount > 9) {
                        return client.config.embedColorYellow;
                    } else {return client.config.embedColorGreen;}
                }
                let lastCoords: Array<number> = [];
                data.forEach((curPC: number /* current player count */, i: number) => {
                    if (curPC < 0) curPC = 0;
                    const x = i * nodeWidth + graphOrigin[0];
                    const y = getYCoordinate(curPC);
                    const nexPC /* next player count */ = data[i + 1];
                    const prvPC /* previous player count */ = data[i - 1];
                    const curColor = colorAtPlayercount(curPC); // color now
                    const prvColor = colorAtPlayercount(prvPC); // color at last point
                    if (curColor !== prvColor && !isNaN(prvPC) && lastCoords.length > 0) { // gradient should be used when the color between now and last point is not the same
                        // gradient from now to last point
                        const grd = ctx.createLinearGradient(...lastCoords, x, y);
                        grd.addColorStop(0, colorAtPlayercount(prvPC)); // prev color at the beginning
                        grd.addColorStop(1, colorAtPlayercount(curPC)); // cur color at the end
                        // special case: playercount rises or falls rapidly accross all colors (eg. straight from red to green)
                        if (curColor !== client.config.embedColorYellow && prvColor !== client.config.embedColorYellow) {
                            const yellowY = getYCoordinate(10); // y coordinate at which line should be yellow
                            const stop = (yellowY - lastCoords[1]) / (y - lastCoords[1]); // between 0 and 1, where is yellowY between y and nextPointCoords[1] ?
                            grd.addColorStop(stop, client.config.embedColorYellow); // add a yellow stop to the gradient
                        }
                        ctx.strokeStyle = grd;
                    } else {
                        ctx.strokeStyle = colorAtPlayercount(curPC);
                    }
                    ctx.beginPath();
                    if (lastCoords.length > 0) ctx.moveTo(...lastCoords);
                    // if the line being drawn is horizontal, make it go until it has to go down
                    if (y === lastCoords[1]) {
                        let newX = x;
                        for (let j = i + 1; j <= data.length; j++) {
                            if (data[j] === curPC) newX += nodeWidth; else break;
                        }
                        ctx.lineTo(newX, y);
                    } else {
                        ctx.lineTo(x, y);
                    }
                    lastCoords = [x, y];
                    ctx.stroke();
                    ctx.closePath();
                
                    if (curPC === prvPC && curPC === nexPC) {
                        return; // no ball because no vertical difference to next or prev point
                    } else {
                        // ball
                        ctx.fillStyle = colorAtPlayercount(curPC);
                        ctx.beginPath();
                        ctx.arc(x, y, ctx.lineWidth * 1.3, 0, 2 * Math.PI)
                        ctx.closePath();
                        ctx.fill();
                    }
                });
            
                // draw text
                ctx.font = '400 ' + textSize + 'px sans-serif';
                ctx.fillStyle = 'white';
            
                // highest value
                const maxx = graphOrigin[0] + graphSize[0] + textSize / 2;
                const maxy = previousY[0] + (textSize / 3);
                ctx.fillText(previousY[1].toLocaleString('en-US'), maxx, maxy);

                // lowest value
                const lowx = graphOrigin[0] + graphSize[0] + textSize / 2;
                const lowy = graphOrigin[1] + graphSize[1] + (textSize / 3);
                ctx.fillText('0 players', lowx, lowy);

                // 30m
                ctx.fillText('30 mins ago', lastMonthStart, graphOrigin[1] - (textSize / 2));

                // time ->
                const tx = graphOrigin[0] + (textSize / 2);
                const ty = graphOrigin[1] + graphSize[1] + (textSize);
                ctx.fillText('time ->', tx, ty);
            
                const Image = new client.attachmentBuilder(img.toBuffer(),{name: 'FSStats.png'})
                embed1.setImage('attachment://FSStats.png')
                const FSserver1 = await MPdata(client, interaction, embed1)
                embed1.setTitle(FSserver1.data.server.name.length == 0 ? 'Offline' : FSserver1?.data.server.name)
                .setDescription(`${FSserver1?.data.slots.used}/${FSserver1?.data.slots.capacity}`)
                .setColor(FSserver1?.data.server.name.length == 0 ? client.config.embedColorRed : client.config.embedColor);
                FSserver1?.data.slots.players.filter(x=>x.isUsed).forEach(player=>{
                    embed1.addFields({name: `${player.name} ${player.isAdmin ? '| admin' : ''}`, value: `Farming for ${(Math.floor(player.uptime/60))} hr, ${('0' + (player.uptime % 60)).slice(-2)} min`})
                })
                interaction.reply({embeds: [embed1], files: [Image]})
                break;
            case 'info':
                const embed2 = new client.embed().setColor(client.config.embedColor)
                const FSserver2 = await MPdata(client, interaction, embed2)
                const DBURL = MPDB.findOne({where: {serverId: interaction.guildId}})
                embed2.setDescription([
                    `**Server name**: ${FSserver2?.data.server.name.length == 0 ? 'Unknown Server' : `\`${FSserver2.data.server.name}\``}`,
                    '**Password:** `mf4700`',
                    '**Crossplay server**',
                    `**Map:** ${FSserver2.data.server.mapName.length == 0 ? 'Null Island' : FSserver2.data.server.mapName}`,
                    `**Mods:** [Click here](${(await DBURL).ip}/mods.html) **|** [Direct Download](${(await DBURL).ip}/all_mods_download?onlyActive=true)`,
                    '**Filters:** [Click here](https://discord.com/channels/468835415093411861/468835769092669461/926581585938120724)'
                ].join('\n'));
                interaction.reply({embeds: [embed2]})
                break;
            case 'series':
                const embed3 = new client.embed().setColor(client.config.embedColor).setTitle('How to join the Daggerwin MP series')
                .setDescription([
                    'To join the Daggerwin MP series, you first need to:',
                    '**1:** Note that only PC players can join the MP series due to the mods that are used.',
                    '**2:** Become a YouTube Member by pressing the `Join` button on [Daggerwin\'s YouTube page](https://www.youtube.com/c/Daggerwin) next to the `Subscribe` button.',
                    '**3:** Link your YouTube account to your Discord account via Settings>Connections>Add connection. Be sure that you link the same YouTube account you used to become a channel member.',
                    '**4:** If you don\'t receive the role within a day or so, please message an Admin and they will sort it out.',
                    '**5:** Take a look in <#511657659364147200> to get information on how to join the server.'
                ].join('\n'));
                interaction.reply({embeds: [embed3]})
        }
    },
    data: new SlashCommandBuilder()
        .setName('mp')
        .setDescription('Display MP status and other things')
        .addSubcommand((opt)=>opt
            .setName('status')
            .setDescription('Check server status and details'))
        .addSubcommand((opt)=>opt
            .setName('players')
            .setDescription('Check who\'s playing on the server'))
        .addSubcommand((opt)=>opt
            .setName('info')
            .setDescription('Provides you with server information such as filters and so on'))
        .addSubcommand((opt)=>opt
            .setName('series')
            .setDescription('Step-by-step on joining Daggerwin\'s MP series'))
}