const Database = require('better-sqlite3');
const path = require('path');
require('dotenv').config({ path: path.join(__dirname, '..', '.env') });

const dbPath = path.resolve(__dirname, '..', process.env.DB_PATH || 'db/monitor.sqlite');
const db = new Database(dbPath);
db.pragma('journal_mode = WAL');

function ensureColumn(table, column, sql) {
  const cols = db.prepare(`PRAGMA table_info(${table})`).all().map(c => c.name);
  if (!cols.includes(column)) {
    db.exec(`ALTER TABLE ${table} ADD COLUMN ${sql}`);
    console.log(`+ ${table}.${column}`);
  }
}

ensureColumn('products', 'location', 'location TEXT');
ensureColumn('products', 'spec_summary', 'spec_summary TEXT');
ensureColumn('products', 'traffic', 'traffic TEXT');
ensureColumn('products', 'billing_cycle', 'billing_cycle TEXT');
ensureColumn('products', 'coupon_code', 'coupon_code TEXT');
ensureColumn('products', 'annual_price', 'annual_price TEXT');
ensureColumn('products', 'tags', 'tags TEXT');
ensureColumn('products', 'buy_url', 'buy_url TEXT');
ensureColumn('products', 'push_intro', 'push_intro TEXT');

console.log('✅ migration done:', dbPath);
db.close();