import mysql from 'mysql2/promise';
import dotenv from 'dotenv';

dotenv.config();

const pool = mysql.createPool({
  host: process.env.DB_HOST,
  user: process.env.DB_USER,
  password: process.env.DB_PASS,
  database: process.env.DB_NAME,
  port: parseInt(process.env.DB_PORT || '3306'),
});

async function migrate() {
    const conn = await pool.getConnection();
    try {
        console.log('1. Creating asset_remote_v4 table...');
        await conn.query(`
            CREATE TABLE IF NOT EXISTS asset_remote_v4 (
                id INT AUTO_INCREMENT PRIMARY KEY,
                asset_id VARCHAR(50) NOT NULL,
                net_type VARCHAR(20) NOT NULL, /* 'IP' or 'REMOTE' */
                net_name VARCHAR(100), /* e.g., '기본망', 'AnyDesk' */
                net_value1 VARCHAR(100), /* IP or ID */
                net_value2 VARCHAR(100), /* MAC or PW */
                is_active TINYINT(1) DEFAULT 1,
                deactivated_at DATETIME NULL,
                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
                FOREIGN KEY (asset_id) REFERENCES asset_core(id) ON DELETE CASCADE
            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
        `);

        console.log('2. Migrating data from asset_remote...');
        const [oldRows] = await conn.query('SELECT * FROM asset_remote WHERE is_active = 1');
        
        let ipCount = 0;
        let remoteCount = 0;

        for (const row of oldRows) {
            // Migrating IP/MAC
            if (row.ip_address || row.mac_address) {
                await conn.query(
                    'INSERT INTO asset_remote_v4 (asset_id, net_type, net_name, net_value1, net_value2, created_at) VALUES (?, ?, ?, ?, ?, ?)',
                    [row.asset_id, 'IP', '기본망', row.ip_address, row.mac_address, row.created_at]
                );
                ipCount++;
            }
            // Migrating Remote
            if (row.remote_tool || row.remote_id || row.remote_pw) {
                await conn.query(
                    'INSERT INTO asset_remote_v4 (asset_id, net_type, net_name, net_value1, net_value2, created_at) VALUES (?, ?, ?, ?, ?, ?)',
                    [row.asset_id, 'REMOTE', row.remote_tool, row.remote_id, row.remote_pw, row.created_at]
                );
                remoteCount++;
            }
        }
        
        console.log(`Migrated ${ipCount} IP records and ${remoteCount} Remote records.`);

        console.log('3. Renaming tables...');
        await conn.query('DROP TABLE IF EXISTS asset_remote_legacy');
        await conn.query('RENAME TABLE asset_remote TO asset_remote_legacy, asset_remote_v4 TO asset_remote;');

        console.log('✅ Migration V4 (Remote) Complete.');
    } catch (e) {
        console.error('Migration failed:', e);
    } finally {
        conn.release();
        pool.end();
    }
}

migrate();