const { Sequelize } = require('sequelize');
const path = require('path');

// 数据库文件路径
const dbPath = path.join(__dirname, 'data/cashier.db');

console.log('Checking database at:', dbPath);

// 创建Sequelize实例
const sequelize = new Sequelize({
  dialect: 'sqlite',
  storage: dbPath,
  logging: false
});

async function checkDatabase() {
  try {
    // 验证连接
    await sequelize.authenticate();
    console.log('Connection has been established successfully.');
    
    // 查询所有表
    const [results] = await sequelize.query("SELECT name FROM sqlite_master WHERE type='table'");
    console.log('Tables in database:', results);
    
    // 检查各个表是否存在
    const tableNames = results.map(table => table.name);
    const requiredTables = ['products', 'categories', 'orders', 'order_items', 'cashiers', 'settings'];
    
    console.log('\nChecking required tables:');
    for (const table of requiredTables) {
      if (tableNames.includes(table)) {
        console.log(`✓ ${table} table exists`);
        // 查询表中的记录数
        try {
          const [countResult] = await sequelize.query(`SELECT COUNT(*) as count FROM ${table}`);
          console.log(`  - Record count: ${countResult[0].count}`);
        } catch (err) {
          console.log(`  - Error getting count: ${err.message}`);
        }
      } else {
        console.log(`✗ ${table} table missing`);
      }
    }
    
    // 如果有products表，查询其中的示例数据
    const productsTable = results.find(table => table.name === 'products');
    if (productsTable) {
      console.log('\nSample products:');
      try {
        const [products] = await sequelize.query("SELECT id, barcode, name, price, stock FROM products LIMIT 5");
        console.log(products);
      } catch (err) {
        console.log('Error getting sample products:', err.message);
      }
    }
    
    await sequelize.close();
  } catch (error) {
    console.error('Error checking database:', error);
  }
}

checkDatabase();