require('dotenv').config();
const { 
    Client, 
    GatewayIntentBits, 
    REST, 
    Routes, 
    SlashCommandBuilder, 
    ActionRowBuilder, 
    ButtonBuilder, 
    ButtonStyle 
} = require('discord.js');
const { 
    joinVoiceChannel, 
    createAudioPlayer, 
    createAudioResource, 
    AudioPlayerStatus, 
    VoiceConnectionStatus 
} = require('@discordjs/voice');
const express = require('express');
const multer = require('multer');
const cron = require('node-cron');
const fs = require('fs');
const path = require('path');

// --- Configuration ---
const DISCORD_TOKEN = process.env.DISCORD_TOKEN;
const CLIENT_ID = process.env.CLIENT_ID;
const GUILD_ID = process.env.GUILD_ID;
const VOICE_CHANNEL_ID = process.env.VOICE_CHANNEL_ID;
const TEXT_CHANNEL_ID = process.env.TEXT_CHANNEL_ID;

let sahurHour = parseInt(process.env.SAHUR_HOUR) || 3;
let sahurMinute = parseInt(process.env.SAHUR_MINUTE) || 0;

const app = express();
const port = 8080;

// Multer for MP3 Upload
const storage = multer.diskStorage({
    destination: (req, file, cb) => cb(null, 'uploads/'),
    filename: (req, file, cb) => cb(null, 'sahur.mp3')
});
const upload = multer({ storage });

// Discord Client
const client = new Client({
    intents: [
        GatewayIntentBits.Guilds,
        GatewayIntentBits.GuildVoiceStates,
        GatewayIntentBits.GuildMessages,
        GatewayIntentBits.MessageContent
    ]
});

// --- Bot Logic ---
async function playSahurAudio(targetVoiceId = VOICE_CHANNEL_ID) {
    const guild = client.guilds.cache.get(GUILD_ID);
    if (!guild) return console.error('Guild not found');

    const voiceChannel = guild.channels.cache.get(targetVoiceId);
    if (!voiceChannel) return console.error('Voice channel not found');

    const filePath = path.join(__dirname, 'uploads', 'sahur.mp3');
    if (!fs.existsSync(filePath)) {
        const textChannel = guild.channels.cache.get(TEXT_CHANNEL_ID);
        if (textChannel) textChannel.send('⚠️ Peringatan: file uploads/sahur.mp3 belum ada!');
        return;
    }

    const connection = joinVoiceChannel({
        channelId: voiceChannel.id,
        guildId: guild.id,
        adapterCreator: guild.voiceAdapterCreator,
    });

    const player = createAudioPlayer();
    const resource = createAudioResource(filePath);

    player.play(resource);
    connection.subscribe(player);

    player.on(AudioPlayerStatus.Idle, () => {
        connection.destroy();
    });

    player.on('error', error => {
        console.error('Error playing audio:', error);
        connection.destroy();
    });
}

// Scheduled Job
let cronTask;
function setupCron() {
    if (cronTask) cronTask.stop();
    const cronExpression = `${sahurMinute} ${sahurHour} * * *`;
    cronTask = cron.schedule(cronExpression, () => {
        console.log(`Running scheduled sahur playback at ${sahurHour}:${sahurMinute}`);
        playSahurAudio();
    });
    console.log(`Scheduled sahur at ${sahurHour}:${sahurMinute}`);
}

// Slash Commands
const commands = [
    new SlashCommandBuilder()
        .setName('testsahur')
        .setDescription('Tes bunyi sahur di voice channel sekarang'),
    new SlashCommandBuilder()
        .setName('setsahur')
        .setDescription('Ubah jadwal sahur')
        .addIntegerOption(option => option.setName('jam').setDescription('Jam (0-23)').setRequired(true))
        .addIntegerOption(option => option.setName('menit').setDescription('Menit (0-59)').setRequired(true)),
    new SlashCommandBuilder()
        .setName('statussahur')
        .setDescription('Cek status bot sahur'),
].map(command => command.toJSON());

const rest = new REST({ version: '10' }).setToken(DISCORD_TOKEN);

async function registerCommands() {
    try {
        console.log('Started refreshing application (/) commands.');
        await rest.put(Routes.applicationGuildCommands(CLIENT_ID, GUILD_ID), { body: commands });
        console.log('Successfully reloaded application (/) commands.');
    } catch (error) {
        console.error(error);
    }
}

client.on('ready', () => {
    console.log(`Bot logged in as ${client.user.tag}`);
    registerCommands();
    setupCron();
});

client.on('interactionCreate', async interaction => {
    if (!interaction.isChatInputCommand()) return;

    if (interaction.commandName === 'testsahur') {
        const member = interaction.member;
        const voiceChannel = member.voice.channel;
        if (!voiceChannel) {
            return interaction.reply({ content: 'Kamu harus berada di voice channel untuk melakukan tes!', ephemeral: true });
        }
        await interaction.reply('Memulai tes bunyi sahur...');
        playSahurAudio(voiceChannel.id);
    }

    if (interaction.commandName === 'setsahur') {
        sahurHour = interaction.options.getInteger('jam');
        sahurMinute = interaction.options.getInteger('menit');
        setupCron();
        await interaction.reply(`Jadwal sahur diubah ke pukul ${sahurHour}:${sahurMinute.toString().padStart(2, '0')}`);
    }

    if (interaction.commandName === 'statussahur') {
        const filePath = path.join(__dirname, 'uploads', 'sahur.mp3');
        const fileExists = fs.existsSync(filePath);
        const stats = fileExists ? fs.statSync(filePath) : null;
        const fileSize = stats ? (stats.size / (1024 * 1024)).toFixed(2) + ' MB' : 'N/A';
        
        await interaction.reply({
            content: `**Status Bot Sahur:**\n` +
                     `- File MP3: ${fileExists ? '✅ Ada' : '❌ Tidak ada'}\n` +
                     `- Ukuran File: ${fileSize}\n` +
                     `- Jadwal Berikutnya: ${sahurHour}:${sahurMinute.toString().padStart(2, '0')}\n` +
                     `- Voice Channel: <#${VOICE_CHANNEL_ID}>`
        });
    }
});

// --- Dashboard Logic ---
app.use(express.static('public'));
app.use(express.urlencoded({ extended: true }));

app.get('/', (req, res) => {
    const filePath = path.join(__dirname, 'uploads', 'sahur.mp3');
    const fileExists = fs.existsSync(filePath);
    const stats = fileExists ? fs.statSync(filePath) : null;
    const fileSize = stats ? (stats.size / (1024 * 1024)).toFixed(2) + ' MB' : 'N/A';

    res.send(`
        <!DOCTYPE html>
        <html>
        <head>
            <title>Sahur Bot Dashboard</title>
            <style>
                body { font-family: sans-serif; background: #1a1a1a; color: #fff; padding: 20px; }
                .card { background: #2a2a2a; padding: 20px; border-radius: 8px; margin-bottom: 20px; }
                input, button { padding: 10px; margin: 5px 0; border-radius: 4px; border: none; }
                button { cursor: pointer; background: #5865f2; color: white; }
                button:hover { background: #4752c4; }
                .status-ok { color: #3ba55c; }
                .status-err { color: #ed4245; }
            </style>
        </head>
        <body>
            <h1>🌙 Sahur Bot Dashboard</h1>
            
            <div class="card">
                <h2>📊 Status</h2>
                <p>File sahur.mp3: <span class="${fileExists ? 'status-ok' : 'status-err'}">${fileExists ? 'Ready (' + fileSize + ')' : 'Missing'}</span></p>
                <p>Jadwal: <strong>${sahurHour}:${sahurMinute.toString().padStart(2, '0')}</strong></p>
            </div>

            <div class="card">
                <h2>📤 Upload Audio (sahur.mp3)</h2>
                <form action="/upload" method="post" enctype="multipart/form-data">
                    <input type="file" name="sahur" accept="audio/mpeg" required><br>
                    <button type="submit">Upload & Overwrite</button>
                </form>
            </div>

            <div class="card">
                <h2>🕒 Ubah Jadwal</h2>
                <form action="/set-time" method="post">
                    Jam: <input type="number" name="hour" value="${sahurHour}" min="0" max="23" required>
                    Menit: <input type="number" name="minute" value="${sahurMinute}" min="0" max="59" required>
                    <button type="submit">Update Jadwal</button>
                </form>
            </div>

            <div class="card">
                <h2>⚡ Kontrol</h2>
                <form action="/test" method="post">
                    <button type="submit" style="background: #3ba55c;">Test Play di Voice Channel</button>
                </form>
            </div>
        </body>
        </html>
    `);
});

app.post('/upload', upload.single('sahur'), (req, res) => {
    res.redirect('/');
});

app.post('/set-time', (req, res) => {
    sahurHour = parseInt(req.body.hour);
    sahurMinute = parseInt(req.body.minute);
    setupCron();
    res.redirect('/');
});

app.post('/test', (req, res) => {
    playSahurAudio();
    res.redirect('/');
});

app.listen(port, () => {
    console.log(`Dashboard running at http://localhost:${port}`);
});

client.login(DISCORD_TOKEN);