const path = require('path');
require('dotenv').config({ path: path.join(__dirname, '../.env') });
const db = require('../db');

async function migrate() {
    try {
        console.log('Running DM migration...');

        // 1. Update the check constraint to allow 'dm' type
        await db.query("ALTER TABLE channels DROP CONSTRAINT IF EXISTS channels_type_check");
        await db.query("ALTER TABLE channels ADD CONSTRAINT channels_type_check CHECK (type IN ('text', 'voice', 'dm'))");
        console.log('  Updated channels type constraint to allow dm.');

        // 2. Create dm_participants table
        await db.query(`
            CREATE TABLE IF NOT EXISTS dm_participants (
                channel_id UUID REFERENCES channels(id) ON DELETE CASCADE,
                user_id UUID REFERENCES users(id) ON DELETE CASCADE,
                PRIMARY KEY (channel_id, user_id)
            )
        `);
        console.log('  Created dm_participants table.');

        console.log('DM migration complete.');
        process.exit(0);
    } catch (err) {
        console.error('DM migration failed:', err);
        process.exit(1);
    }
}

migrate();