const Database = require('better-sqlite3');
const path = require('path');

const dbPath = process.env.DB_PATH || path.join(__dirname, 'data/school.db');
const db = new Database(dbPath);

try {
  db.exec(`
    CREATE TABLE IF NOT EXISTS chat_groups (
      id INTEGER PRIMARY KEY AUTOINCREMENT,
      uid TEXT UNIQUE,
      name TEXT NOT NULL,
      created_by INTEGER,
      created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
      updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
      is_deleted INTEGER DEFAULT 0
    );
    
    CREATE TABLE IF NOT EXISTS chat_group_members (
      group_id INTEGER,
      user_id INTEGER,
      joined_at DATETIME DEFAULT CURRENT_TIMESTAMP,
      PRIMARY KEY (group_id, user_id)
    );
  `);
  
  try {
    db.exec('ALTER TABLE messages ADD COLUMN group_id INTEGER;');
  } catch(e) {
    console.log('group_id already exists or error:', e.message);
  }

  console.log('Migration complete');
} catch (e) {
  console.error(e);
}