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

// 載入環境變數
dotenv.config();

// 資料庫配置
const dbConfig = {
  host: process.env.DB_HOST || 'mysql.theaken.com',
  port: parseInt(process.env.DB_PORT) || 33306,
  user: process.env.DB_USER || 'A102',
  password: process.env.DB_PASSWORD || 'Bb123456',
  database: process.env.DB_NAME || 'db_A102'
};

// 測試帳號列表
const testUsers = [
  {
    employee_id: 'ADMIN001',
    username: 'admin',
    email: 'admin@example.com',
    password: 'Admin@123456',
    role: 'super_admin',
    department: 'IT',
    position: '系統管理員'
  },
  {
    employee_id: 'MGR001',
    username: 'manager',
    email: 'manager@example.com',
    password: 'Manager@123456',
    role: 'admin',
    department: '品質管理部',
    position: '品管經理'
  },
  {
    employee_id: 'TEST001',
    username: 'testuser',
    email: 'user@example.com',
    password: 'User@123456',
    role: 'user',
    department: '生產部',
    position: '工程師'
  }
];

async function seedTestUsers() {
  let connection;

  try {
    console.log('\n╔════════════════════════════════════════════╗');
    console.log('║  5 Why Analyzer - Seed Test Users          ║');
    console.log('╚════════════════════════════════════════════╝\n');

    console.log('🔄 Connecting to database...');
    connection = await mysql.createConnection(dbConfig);
    console.log('✅ Connected successfully\n');

    for (const user of testUsers) {
      // 檢查使用者是否已存在 (只用 email 精確匹配)
      const [existing] = await connection.execute(
        'SELECT id FROM users WHERE email = ?',
        [user.email]
      );

      if (existing.length > 0) {
        // 更新現有使用者的密碼
        const passwordHash = await bcrypt.hash(user.password, 10);
        await connection.execute(
          'UPDATE users SET password_hash = ?, role = ?, is_active = 1, employee_id = ? WHERE email = ?',
          [passwordHash, user.role, user.employee_id, user.email]
        );
        console.log(`🔄 Updated: ${user.email} (${user.role})`);
      } else {
        // 建立新使用者
        const passwordHash = await bcrypt.hash(user.password, 10);
        await connection.execute(
          `INSERT INTO users (employee_id, username, email, password_hash, role, department, position, is_active)
           VALUES (?, ?, ?, ?, ?, ?, ?, 1)`,
          [user.employee_id, user.username, user.email, passwordHash, user.role, user.department, user.position]
        );
        console.log(`✅ Created: ${user.email} (${user.role})`);
      }
    }

    console.log('\n✅ Test users seeded successfully!\n');
    console.log('📋 Test Accounts:');
    console.log('─────────────────────────────────────────────');
    testUsers.forEach(user => {
      console.log(`   ${user.role.padEnd(12)} : ${user.email} / ${user.password}`);
    });
    console.log('─────────────────────────────────────────────\n');

  } catch (error) {
    console.error('\n❌ Seeding failed:');
    console.error('   Error:', error.message);
    process.exit(1);
  } finally {
    if (connection) {
      await connection.end();
      console.log('🔌 Database connection closed\n');
    }
  }
}

// 執行
seedTestUsers();