/**
 * 邀请注册管理控制器（后台管理）
 * 提供邀请注册相关的接口，不需要登录验证
 */

const Framework = require("../../framework/node-core-framework.js");
const dayjs = require('dayjs');
const email_service = require('../services/email_service.js');

module.exports = {
  /**
   * @swagger
   * /admin_api/invite/register:
   *   post:
   *     summary: 邀请注册
   *     description: 通过邀请码注册新用户，注册成功后给邀请人增加3天试用期
   *     tags: [后台-邀请注册]
   *     requestBody:
   *       required: true
   *       content:
   *         application/json:
   *           schema:
   *             type: object
   *             required:
   *               - email
   *               - password
   *               - email_code
   *             properties:
   *               email:
   *                 type: string
   *                 description: 邮箱地址
   *                 example: 'user@example.com'
   *               password:
   *                 type: string
   *                 description: 密码
   *                 example: 'password123'
   *               email_code:
   *                 type: string
   *                 description: 验证码
   *                 example: '123456'
   *               invite_code:
   *                 type: string
   *                 description: 邀请码（选填）
   *                 example: 'INV123_ABC123'
   *     responses:
   *       200:
   *         description: 注册成功
   */
  'POST /invite/register': async (ctx) => {
    try {
      const body = ctx.getBody();
      const { email, password, email_code, invite_code } = body;

      // 验证必填参数
      if (!email || !password || !email_code) {
        return ctx.fail('邮箱、密码和验证码不能为空');
      }

      // 验证邮箱格式
      const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
      if (!emailRegex.test(email)) {
        return ctx.fail('邮箱格式不正确');
      }

      // 验证密码长度
      if (password.length < 6) {
        return ctx.fail('密码长度不能少于6位');
      }

      // 统一邮箱地址为小写
      const email_normalized = email.toLowerCase().trim();

      // 验证验证码
      const emailVerifyResult = await verifyEmailCode(email_normalized, email_code);
      if (!emailVerifyResult.success) {
        return ctx.fail(emailVerifyResult.message || '验证码错误或已过期');
      }

      const { pla_account } = await Framework.getModels();

      // 检查邮箱是否已注册（使用统一的小写邮箱）
      const existingUser = await pla_account.findOne({
        where: { login_name: email_normalized }
      });

      if (existingUser) {
        return ctx.fail('该邮箱已被注册');
      }

      // 验证邀请码（如果提供了邀请码）
      let inviter = null;
      let inviter_id = null;

      if (invite_code) {
        // 解析邀请码，获取邀请人ID
        // 邀请码格式：INV{user_id}_{timestamp}
        const inviteMatch = invite_code.match(/^INV(\d+)_/);
        if (!inviteMatch) {
          return ctx.fail('邀请码格式不正确');
        }

        inviter_id = parseInt(inviteMatch[1]);

        // 验证邀请人是否存在
        inviter = await pla_account.findOne({
          where: { id: inviter_id }
        });

        if (!inviter) {
          return ctx.fail('邀请码无效，邀请人不存在');
        }
      }

      // 生成设备SN码（基于邮箱和时间戳）
      const sn_code = `SN${Date.now()}${Math.random().toString(36).substr(2, 6).toUpperCase()}`;

      // 创建新用户（使用统一的小写邮箱）
      const newUser = await pla_account.create({
        name: email_normalized.split('@')[0], // 默认使用邮箱用户名作为名称
        sn_code: sn_code,
        device_id: '', // 设备ID由客户端登录时提供
        platform_type: 'boss', // 默认平台类型
        login_name: email_normalized,
        pwd: password,
        keyword: '',
        is_enabled: 1,
        is_delete: 0,
        authorization_date: null,
        authorization_days: 0
      });

      // 给邀请人增加3天试用期
      if (inviter) {
        const inviterData = inviter.toJSON();
        const currentAuthDate = inviterData.authorization_date;
        const currentAuthDays = inviterData.authorization_days || 0;

        let newAuthDate = currentAuthDate;
        let newAuthDays = currentAuthDays + 3; // 增加3天

        // 如果当前没有授权日期，则从今天开始
        if (!currentAuthDate) {
          newAuthDate = new Date();
        } else {
          // 如果当前授权已过期，从今天开始计算
          const currentEndDate = dayjs(currentAuthDate).add(currentAuthDays, 'day');
          const now = dayjs();
          if (currentEndDate.isBefore(now)) {
            newAuthDate = new Date();
            newAuthDays = 3; // 重新设置为3天
          }
        }

        // 更新邀请人的授权信息
        await pla_account.update(
          {
            authorization_date: newAuthDate,
            authorization_days: newAuthDays
          },
          { where: { id: inviter_id } }
        );

        // 记录邀请记录
        const { invite_record } = await Framework.getModels();
        await invite_record.create({
          inviter_id: inviter_id,
          inviter_sn_code: inviter.sn_code,
          invitee_id: newUser.id,
          invitee_sn_code: newUser.sn_code,
          invitee_phone: email, // 使用邮箱代替手机号
          invite_code: invite_code,
          register_time: new Date(),
          reward_status: 1, // 已发放
          reward_type: 'trial_days',
          reward_value: 3,
          is_delete: 0
        });

        console.log(`[邀请注册] 用户 ${email_normalized} 通过邀请码 ${invite_code} 注册成功，邀请人 ${inviter.sn_code} 获得3天试用期`);
      } else {
        console.log(`[邀请注册] 用户 ${email_normalized} 注册成功（无邀请码）`);
      }

      return ctx.success({
        message: '注册成功',
        user: {
          id: newUser.id,
          sn_code: newUser.sn_code,
          login_name: newUser.login_name
        }
      });
    } catch (error) {
      console.error('邀请注册失败:', error);
      return ctx.fail('注册失败: ' + error.message);
    }
  },

  /**
   * @swagger
   * /admin_api/invite/send-email-code:
   *   post:
   *     summary: 发送验证码
   *     description: 发送验证码到指定邮箱地址
   *     tags: [后台-邀请注册]
   *     requestBody:
   *       required: true
   *       content:
   *         application/json:
   *           schema:
   *             type: object
   *             required:
   *               - email
   *             properties:
   *               email:
   *                 type: string
   *                 description: 邮箱地址
   *                 example: 'user@example.com'
   *     responses:
   *       200:
   *         description: 发送成功
   */
  'POST /invite/send-email-code': async (ctx) => {
    try {
      const body = ctx.getBody();
      const { email } = body;

      if (!email) {
        return ctx.fail('邮箱地址不能为空');
      }

      // 验证邮箱格式
      const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
      if (!emailRegex.test(email)) {
        return ctx.fail('邮箱格式不正确');
      }

      // 统一邮箱地址为小写
      const email_normalized = email.toLowerCase().trim();

      // 发送验证码
      const emailResult = await sendEmailCode(email_normalized);
      if (!emailResult.success) {
        return ctx.fail(emailResult.message || '发送验证码失败');
      }

      return ctx.success({
        message: '验证码已发送',
        expire_time: emailResult.expire_time || 300 // 默认5分钟过期
      });
    } catch (error) {
      console.error('发送验证码失败:', error);
      return ctx.fail('发送验证码失败: ' + error.message);
    }
  }
};

/**
 * 发送验证码
 * @param {string} email 邮箱地址
 * @returns {Promise<{success: boolean, message?: string, expire_time?: number}>}
 */
async function sendEmailCode(email) {
  try {

    // 获取框架的 Redis 服务
    const redis_service = Framework.getServices().redisService;


    // 统一邮箱地址为小写，避免大小写不一致导致的问题
    const email_lower = email.toLowerCase().trim();

    // 生成6位随机验证码
    const code = Math.floor(100000 + Math.random() * 900000).toString();

    // Redis key
    const redis_key = `email_code:${email_lower}`;
    

    // 验证码数据
    const code_data = {
      code: code,
      created_at: Date.now()
    };

    // 存储到 Redis，设置 5 分钟过期时间（300秒）
    try {
      await redis_service.set(redis_key, JSON.stringify(code_data), 300);
    } catch (redis_error) {
      console.error(`[邮箱验证] Redis 存储失败: ${email_lower}`, redis_error);
      return {
        success: false,
        message: '验证码存储失败，请稍后重试'
      };
    }

    console.log(`[邮箱验证] 生成验证码: ${email_lower} -> ${code}, 已存储到 Redis (5分钟过期)`);

    // 调用邮件服务发送验证码
    const email_result = await email_service.send_verification_code(email_lower, code);

    if (!email_result.success) {
      // 如果邮件发送失败，删除已生成的验证码
      try {
        await redis_service.del(redis_key);
      } catch (del_error) {
        console.error(`[邮箱验证] 删除验证码失败:`, del_error);
      }
      console.error(`[邮箱验证] 邮件发送失败，已删除验证码: ${email_lower}`);
      return {
        success: false,
        message: email_result.message || '发送验证码失败'
      };
    }

    console.log(`[邮箱验证] 验证码已发送到 ${email_lower}: ${code} (5分钟内有效)`);

    return {
      success: true,
      expire_time: 300
    };
  } catch (error) {
    console.error('发送验证码失败:', error);
    return {
      success: false,
      message: error.message || '发送验证码失败'
    };
  }
}

/**
 * 验证验证码
 * @param {string} email 邮箱地址
 * @param {string} code 验证码
 * @returns {Promise<{success: boolean, message?: string}>}
 */
async function verifyEmailCode(email, code) {
  try {
    // 统一邮箱地址为小写，避免大小写不一致导致的问题
    const email_lower = email.toLowerCase().trim();

    console.log(`[邮箱验证] 开始验证: ${email_lower}, 验证码: ${code}`);

    // Redis key
    const redis_key = `email_code:${email_lower}`;

    // 从 Redis 获取验证码
    let cached_str;
    try {
      cached_str = await redis_service.get(redis_key);
    } catch (redis_error) {
      console.error(`[邮箱验证] Redis 获取失败:`, redis_error);
      return {
        success: false,
        message: '验证码获取失败，请稍后重试'
      };
    }

    if (!cached_str) {
      console.log(`[邮箱验证] 未找到该邮箱的验证码: ${email_lower}`);
      return {
        success: false,
        message: '验证码不存在或已过期，请重新获取'
      };
    }

    // 解析验证码数据
    let cached;
    try {
      cached = JSON.parse(cached_str);
    } catch (parse_error) {
      console.error(`[邮箱验证] 解析验证码数据失败:`, parse_error);
      try {
        await redis_service.del(redis_key);
      } catch (del_error) {
        console.error(`[邮箱验证] 删除异常数据失败:`, del_error);
      }
      return {
        success: false,
        message: '验证码数据异常，请重新获取'
      };
    }

    console.log(`[邮箱验证] 找到验证码，创建时间: ${new Date(cached.created_at).toLocaleString()}`);

    // 验证码是否正确
    if (cached.code !== code) {
      console.log(`[邮箱验证] 验证码错误，期望: ${cached.code}, 实际: ${code}`);
      return {
        success: false,
        message: '验证码错误'
      };
    }

    // 验证成功后删除缓存
    try {
      await redis_service.del(redis_key);
    } catch (del_error) {
      console.error(`[邮箱验证] 删除验证码失败:`, del_error);
    }
    console.log(`[邮箱验证] 验证成功: ${email_lower}`);

    return {
      success: true
    };
  } catch (error) {
    console.error('验证验证码失败:', error);
    return {
      success: false,
      message: error.message || '验证失败'
    };
  }
}