const { Client, GatewayIntentBits, Collection } = require('discord.js');
const fs = require('fs');
const path = require('path');
const deployCommands = require('./deploy-commands');
const { readDb } = require('../backend/db');

const client = new Client({ intents: [GatewayIntentBits.Guilds, GatewayIntentBits.GuildMembers] });

client.commands = new Collection();

const commandHandler = require('./handlers/command-handler');
const eventHandler = require('./handlers/event-handler');

commandHandler(client);
eventHandler(client);

client.on('interactionCreate', async interaction => {
    // Handle button/component interactions for invites
    if (interaction.isButton && interaction.isButton()) {
        const id = interaction.customId || '';
        if (id.startsWith('copy_inv_')) {
            const code = id.replace('copy_inv_', '');
            const db = readDb();
            const invites = (db[interaction.guildId] && db[interaction.guildId].invites) ? db[interaction.guildId].invites : [];
            const inv = invites.find(i => i.code === code);
            if (inv) {
                await interaction.reply({ content: `Invite: ${inv.url}`, ephemeral: true });
            } else {
                await interaction.reply({ content: 'Invite not found.', ephemeral: true });
            }
        } else if (id.startsWith('delete_inv_')) {
            const code = id.replace('delete_inv_', '');
            // permission check: admin only
            const member = interaction.member;
            if (!member.permissions.has('Administrator')) {
                await interaction.reply({ content: 'You must be an administrator to delete invites.', ephemeral: true });
                return;
            }
            try {
                // call backend delete endpoint
                const fetch = require('node-fetch');
                const backendBase = process.env.BACKEND_BASE || `http://${process.env.HOST || '127.0.0.1'}:${process.env.PORT || 3002}`;
                const url = `${backendBase}/api/servers/${interaction.guildId}/invites/${code}`;
                await fetch(url, { method: 'DELETE' });
                await interaction.reply({ content: 'Invite deleted.', ephemeral: true });
            } catch (e) {
                console.error('Error deleting invite via API:', e);
                await interaction.reply({ content: 'Failed to delete invite.', ephemeral: true });
            }
        }
        return;
    }

    if (!interaction.isCommand()) return;

    const command = client.commands.get(interaction.commandName);

    if (!command) return;

    // Check per-guild toggles
    try {
        const db = readDb();
        const guildSettings = db[interaction.guildId] || {};
        const toggles = guildSettings.commandToggles || {};
        const protectedCommands = ['manage-commands', 'help'];

        // If command is protected, always allow
        if (!protectedCommands.includes(command.name)) {
            if (toggles[command.name] === false) {
                await interaction.reply({ content: 'This command has been disabled on this server.', flags: 64 });
                return;
            }
            // If the module-level enabled flag is false, treat as disabled too
            if (command.enabled === false) {
                await interaction.reply({ content: 'This command is currently disabled globally.', flags: 64 });
                return;
            }
        }

        try {
            await command.execute(interaction);
        } catch (error) {
            console.error(error);
            await interaction.reply({ content: 'There was an error while executing this command!', flags: 64 });
        }
    } catch (error) {
        console.error('Error checking command toggles:', error);
        await interaction.reply({ content: 'Internal error occurred.', flags: 64 });
    }
});

client.on('guildCreate', guild => {
    deployCommands(guild.id);
});

const login = () => {
    client.login(process.env.DISCORD_BOT_TOKEN);
}

module.exports = { login, client };