const mysql = require('mysql2');

// 数据库配置
const configs = [
  {
    name: '测试环境',
    host: '192.168.0.240',
    port: 3306,
    user: 'root',
    password: 'aiot$Aiot123'
  },
  {
    name: '生产环境', 
    host: '129.211.213.226',
    port: 9527,
    user: 'root',
    password: 'aiotAiot123!'
  }
];

// 创建数据库的SQL语句
const createDatabaseSQL = `
CREATE DATABASE IF NOT EXISTS jiebandata 
CHARACTER SET utf8mb4 
COLLATE utf8mb4_unicode_ci;
`;

// 创建用户表的SQL语句
const createUsersTableSQL = `
CREATE TABLE IF NOT EXISTS jiebandata.users (
  id INT AUTO_INCREMENT PRIMARY KEY,
  openid VARCHAR(64) UNIQUE NOT NULL,
  nickname VARCHAR(50) NOT NULL,
  avatar VARCHAR(255),
  gender ENUM('male', 'female', 'other'),
  birthday DATE,
  phone VARCHAR(20) UNIQUE,
  email VARCHAR(100) UNIQUE,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  INDEX idx_openid (openid),
  INDEX idx_phone (phone),
  INDEX idx_email (email)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
`;

// 创建商家表的SQL语句
const createMerchantsTableSQL = `
CREATE TABLE IF NOT EXISTS jiebandata.merchants (
  id INT AUTO_INCREMENT PRIMARY KEY,
  user_id INT NOT NULL,
  merchant_type ENUM('flower_shop', 'activity_organizer', 'farm_owner') NOT NULL,
  business_name VARCHAR(100) NOT NULL,
  business_license VARCHAR(255),
  contact_person VARCHAR(50) NOT NULL,
  contact_phone VARCHAR(20) NOT NULL,
  address VARCHAR(255),
  description TEXT,
  status ENUM('pending', 'approved', 'rejected', 'suspended') NOT NULL DEFAULT 'pending',
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  FOREIGN KEY (user_id) REFERENCES users(id),
  INDEX idx_user_id (user_id),
  INDEX idx_status (status)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
`;

// 创建旅行计划表的SQL语句
const createTravelPlansTableSQL = `
CREATE TABLE IF NOT EXISTS jiebandata.travel_plans (
  id INT AUTO_INCREMENT PRIMARY KEY,
  user_id INT NOT NULL,
  destination VARCHAR(100) NOT NULL,
  start_date DATE NOT NULL,
  end_date DATE NOT NULL,
  budget DECIMAL(10,2) NOT NULL,
  interests TEXT,
  visibility ENUM('public', 'friends', 'private') NOT NULL DEFAULT 'public',
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  FOREIGN KEY (user_id) REFERENCES users(id),
  INDEX idx_user_id (user_id),
  INDEX idx_destination (destination),
  INDEX idx_dates (start_date, end_date)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
`;

// 创建管理员表的SQL语句
const createAdminsTableSQL = `
CREATE TABLE IF NOT EXISTS jiebandata.admins (
  id INT AUTO_INCREMENT PRIMARY KEY,
  username VARCHAR(50) NOT NULL UNIQUE,
  password VARCHAR(255) NOT NULL,
  email VARCHAR(100),
  nickname VARCHAR(50),
  avatar VARCHAR(255),
  role VARCHAR(20) NOT NULL DEFAULT 'admin',
  status TINYINT(1) NOT NULL DEFAULT 1,
  last_login DATETIME,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  INDEX idx_username (username),
  INDEX idx_role (role),
  INDEX idx_status (status)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
`;

// 所有表创建语句
const tableCreationSQLs = [
  createUsersTableSQL,
  createMerchantsTableSQL,
  createTravelPlansTableSQL,
  createAdminsTableSQL
];

function executeSQL(connection, sql, description) {
  return new Promise((resolve, reject) => {
    console.log(`🛠️  ${description}...`);
    connection.query(sql, (err, results) => {
      if (err) {
        console.error(`❌ ${description}失败:`, err.message);
        reject(err);
      } else {
        console.log(`✅ ${description}成功`);
        resolve(results);
      }
    });
  });
}

async function initializeDatabase(config) {
  console.log(`\n🚀 开始初始化 ${config.name} 数据库...`);
  console.log('='.repeat(60));

  const connection = mysql.createConnection({
    host: config.host,
    port: config.port,
    user: config.user,
    password: config.password,
    multipleStatements: true // 允许执行多条SQL语句
  });

  try {
    // 连接数据库
    await new Promise((resolve, reject) => {
      connection.connect((err) => {
        if (err) reject(err);
        else resolve();
      });
    });

    // 创建数据库
    await executeSQL(connection, createDatabaseSQL, '创建数据库 jiebandata');

    // 使用新创建的数据库
    await executeSQL(connection, 'USE jiebandata', '切换到 jiebandata 数据库');

    // 创建所有表
    for (let i = 0; i < tableCreationSQLs.length; i++) {
      await executeSQL(connection, tableCreationSQLs[i], `创建表 ${i + 1}/${tableCreationSQLs.length}`);
    }

    // 插入示例数据
    console.log('📝 插入示例数据...');
    
    // 插入示例用户
    await executeSQL(connection, `
      INSERT IGNORE INTO users (openid, nickname, avatar, gender, phone, email) VALUES
      ('test_openid_1', '测试用户1', 'https://example.com/avatar1.jpg', 'male', '13800138001', 'user1@example.com'),
      ('test_openid_2', '测试用户2', 'https://example.com/avatar2.jpg', 'female', '13800138002', 'user2@example.com')
    `, '插入示例用户数据');

    // 插入示例管理员
    await executeSQL(connection, `
      INSERT IGNORE INTO admins (username, password, email, nickname, role) VALUES
      ('admin', '$2a$10$rZ.r/.H0he7d.9T3.1E3qOeP.UZvF0.U6BQ35ENcQbLQzvEuh3dOq', 'admin@example.com', '超级管理员', 'admin')
    `, '插入示例管理员数据');

    // 验证数据插入
    const usersResult = await new Promise((resolve, reject) => {
      connection.query('SELECT COUNT(*) as count FROM users', (err, results) => {
        if (err) reject(err);
        else resolve(results);
      });
    });

    console.log(`✅ 数据库初始化完成！用户表中有 ${usersResult[0].count} 条记录`);

    return { success: true, message: '数据库初始化成功' };

  } catch (error) {
    console.error('❌ 数据库初始化失败:', error.message);
    return { success: false, error: error.message };
  } finally {
    // 关闭连接
    connection.end();
    console.log('✅ 数据库连接已关闭');
  }
}

async function main() {
  console.log('🎯 结伴客系统数据库初始化工具');
  console.log('='.repeat(60));

  // 直接使用生产环境配置
  const config = configs[1]; // 生产环境配置
  const result = await initializeDatabase(config);
  if (result.success) {
    console.log('\n🎉 数据库初始化成功！');
    process.exit(0);
  }

  console.log('\n' + '='.repeat(60));
  console.log('❌ 数据库初始化失败，请检查网络连接和数据库配置');
  process.exit(1);
}

// 运行初始化
main().catch(console.error);

module.exports = { initializeDatabase };