import { FastifyRequest, FastifyReply, FastifyInstance } from 'fastify'
import { MemberService } from '../services/member.service'
import {
  CreateMemberBody,
  UpdateMemberBody,
  ListMemberQuery,
  MemberResponse,
  UpdateGuestBody,
  MemberLoginBody,
  ResetPasswordBody
} from '../dto/member.dto'
import { VipLevel, MemberStatus } from '../entities/member.entity'
import { UserService } from '../services/user.service'

export class MemberController {
  private memberService: MemberService
  private userService: UserService

  constructor(app: FastifyInstance) {
    this.memberService = new MemberService(app)
    this.userService = new UserService(app)
  }

  async createGuest(request: FastifyRequest<{ Querystring: { code?: string } }>, reply: FastifyReply) {
    try {
      const { code } = request.query || {}

      const ip =
        request.ip ||
        (request.headers['x-forwarded-for'] as string) ||
        (request.headers['x-real-ip'] as string) ||
        'unknown'

      const user = await this.memberService.createGuest(code, ip)
      const token = await reply.jwtSign({ id: user.id, name: user.name, role: user.role })

      return reply.code(201).send({
        user: {
          id: user.id,
          name: user.name,
          vipLevel: VipLevel.GUEST
        },
        token
      })
    } catch (error) {
      return reply.code(500).send({ message: '创建游客失败', error })
    }
  }

  async upgradeGuest(request: FastifyRequest<{ Body: UpdateGuestBody }>, reply: FastifyReply) {
    try {
      const { userId, name, password, email, phone } = request.body

      if (!name || !password) {
        return reply.code(400).send({ message: '用户名和密码为必填字段' })
      }
      if (name.length < 3 || name.length > 20) {
        return reply.code(400).send({ message: '用户名长度必须在3-20个字符之间' })
      }
      if (password.length < 6) {
        return reply.code(400).send({ message: '密码长度不能少于6个字符' })
      }
      if (email && !/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email)) {
        return reply.code(400).send({ message: '邮箱格式不正确' })
      }
      if (phone && !/^1[3-9]\d{9}$/.test(phone)) {
        return reply.code(400).send({ message: '手机号格式不正确' })
      }

      await this.memberService.upgradeGuest(userId, name, password, email, phone)

      return reply.send({ message: '游客账户转换成功' })
    } catch (error) {
      const errorMessage = error instanceof Error ? error.message : '更新游客失败'
      if (errorMessage.includes('不存在')) {
        return reply.code(404).send({ message: errorMessage })
      } else if (errorMessage.includes('已被使用') || errorMessage.includes('格式')) {
        return reply.code(400).send({ message: errorMessage })
      }

      return reply.code(500).send({ message: '更新游客失败', error: errorMessage })
    }
  }

  async memberLogin(request: FastifyRequest<{ Body: MemberLoginBody }>, reply: FastifyReply) {
    try {
      const { name, password } = request.body

      if (!name || !password) {
        return reply.code(400).send({ message: '请输入用户名和密码' })
      }
      const loginResult = await this.memberService.validateMemberLogin(name, password)
      if (!loginResult) {
        return reply.code(401).send({ message: '用户名或密码错误' })
      }
      const { user, member } = loginResult
      const token = await reply.jwtSign({ id: user.id, name: user.name, role: user.role })
      await this.memberService.checkVipExpireTime(member)

      return reply.send({
        user: {
          id: user.id,
          name: user.name,
          role: user.role,
          vipLevel: member.vipLevel
        },
        token
      })
    } catch (error) {
      return reply.code(500).send(error)
    }
  }

  async profile(request: FastifyRequest, reply: FastifyReply) {
    try {
      const user = await this.userService.findById(request.user.id)
      if (!user) {
        return reply.code(404).send({ message: '会员信息不存在' })
      }
      const member = await this.memberService.findByUserId(user.id)
      if (!member) {
        return reply.code(404).send({ message: '会员信息不存在' })
      }
      await this.memberService.checkVipExpireTime(member)
      return reply.send({
        id: user.id,
        name: user.name,
        role: user.role,
        vipLevel: member.vipLevel,
        vipExpireTime: member.vipExpireTime
      })
    } catch (error) {
      return reply.code(500).send(error)
    }
  }

  async resetPassword(request: FastifyRequest<{ Body: ResetPasswordBody }>, reply: FastifyReply) {
    try {
      const { password } = request.body
      if (password.length < 8 || !/(?=.*[a-z])(?=.*[A-Z])(?=.*\d)/.test(password)) {
        return reply.code(400).send({ message: '密码长度必须至少8位，包含大小写字母和数字' })
      }

      await this.userService.resetPassword(request.user.id, password)
      return reply.send({ message: '密码重置成功' })
    } catch (error) {
      return reply.code(500).send(error)
    }
  }

  async updateVipLevel(
    request: FastifyRequest<{
      Params: { id: string }
      Body: { vipLevel: VipLevel; vipExpireTime?: Date }
    }>,
    reply: FastifyReply
  ) {
    try {
      const id = parseInt(request.params.id)
      const { vipLevel, vipExpireTime } = request.body

      const updatedMember = await this.memberService.updateVipLevel(id, vipLevel, vipExpireTime)

      return reply.send({
        member: {
          vipLevel: updatedMember.vipLevel,
          vipExpireTime: updatedMember.vipExpireTime
        }
      })
    } catch (error) {
      return reply.code(500).send({ message: '更新VIP等级失败', error })
    }
  }

  async create(request: FastifyRequest<{ Body: CreateMemberBody }>, reply: FastifyReply) {
    try {
      const { userId, email, phone, vipLevel, status, vipExpireTime } = request.body

      // 检查用户是否已存在
      const existingMember = await this.memberService.findByUserId(userId)
      if (existingMember) {
        return reply.code(400).send({ message: '该用户已经是会员' })
      }

      // 检查邮箱是否已存在
      if (email) {
        const existingEmail = await this.memberService.findByEmail(email)
        if (existingEmail) {
          return reply.code(400).send({ message: '邮箱已被使用' })
        }
      }

      // 检查手机号是否已存在
      if (phone) {
        const existingPhone = await this.memberService.findByPhone(phone)
        if (existingPhone) {
          return reply.code(400).send({ message: '手机号已被使用' })
        }
      }

      const member = await this.memberService.create({
        userId,
        email,
        phone,
        vipLevel,
        status,
        vipExpireTime
      })

      return reply.code(201).send({ message: '创建会员成功' })
    } catch (error) {
      return reply.code(500).send({ message: '创建会员失败', error })
    }
  }

  async getById(request: FastifyRequest<{ Params: { id: string } }>, reply: FastifyReply) {
    try {
      const id = parseInt(request.params.id)
      const member = await this.memberService.findById(id)

      return reply.send({
        member: {
          id: member.id,
          userId: member.userId,
          email: member.email,
          phone: member.phone,
          vipLevel: member.vipLevel,
          status: member.status,
          vipExpireTime: member.vipExpireTime,
          lastLoginAt: member.lastLoginAt,
          createdAt: member.createdAt,
          updatedAt: member.updatedAt
        }
      })
    } catch (error) {
      return reply.code(404).send({ message: '会员不存在' })
    }
  }

  async getByUserId(request: FastifyRequest<{ Params: { userId: string } }>, reply: FastifyReply) {
    try {
      const userId = parseInt(request.params.userId)
      const member = await this.memberService.findByUserId(userId)

      if (!member) {
        return reply.code(404).send({ message: '会员不存在' })
      }

      return reply.send({
        member: {
          id: member.id,
          userId: member.userId,
          email: member.email,
          phone: member.phone,
          vipLevel: member.vipLevel,
          status: member.status,
          vipExpireTime: member.vipExpireTime,
          lastLoginAt: member.lastLoginAt,
          createdAt: member.createdAt,
          updatedAt: member.updatedAt
        }
      })
    } catch (error) {
      return reply.code(500).send({ message: '查询会员失败', error })
    }
  }

  async list(request: FastifyRequest<{ Querystring: ListMemberQuery }>, reply: FastifyReply) {
    try {
      const { page, size, vipLevel, status, userId } = request.query

      const result = await this.memberService.list(page || 0, size || 20, { vipLevel, status, userId })

      return reply.send(result)
    } catch (error) {
      return reply.code(500).send({ message: '查询会员列表失败', error })
    }
  }

  async update(request: FastifyRequest<{ Body: UpdateMemberBody }>, reply: FastifyReply) {
    try {
      const { id, userId, email, phone, vipLevel, status, vipExpireTime } = request.body

      // 检查会员是否存在
      try {
        await this.memberService.findById(id)
      } catch (error) {
        return reply.code(404).send({ message: '会员不存在' })
      }

      // 检查邮箱是否已被其他会员使用
      if (email) {
        const existingEmail = await this.memberService.findByEmail(email)
        if (existingEmail && existingEmail.id !== id) {
          return reply.code(400).send({ message: '邮箱已被其他会员使用' })
        }
      }

      // 检查手机号是否已被其他会员使用
      if (phone) {
        const existingPhone = await this.memberService.findByPhone(phone)
        if (existingPhone && existingPhone.id !== id) {
          return reply.code(400).send({ message: '手机号已被其他会员使用' })
        }
      }

      const updatedMember = await this.memberService.update(id, {
        userId,
        email,
        phone,
        vipLevel,
        status,
        vipExpireTime
      })

      return reply.send({
        member: {
          id: updatedMember.id,
          userId: updatedMember.userId,
          email: updatedMember.email,
          phone: updatedMember.phone,
          vipLevel: updatedMember.vipLevel,
          status: updatedMember.status,
          vipExpireTime: updatedMember.vipExpireTime,
          lastLoginAt: updatedMember.lastLoginAt,
          createdAt: updatedMember.createdAt,
          updatedAt: updatedMember.updatedAt
        }
      })
    } catch (error) {
      return reply.code(500).send({ message: '更新会员失败', error })
    }
  }

  async delete(request: FastifyRequest<{ Params: { id: string } }>, reply: FastifyReply) {
    try {
      const id = parseInt(request.params.id)

      // 检查会员是否存在
      try {
        await this.memberService.findById(id)
      } catch (error) {
        return reply.code(404).send({ message: '会员不存在' })
      }

      await this.memberService.delete(id)

      return reply.send({ message: '删除会员成功' })
    } catch (error) {
      return reply.code(500).send({ message: '删除会员失败', error })
    }
  }

  async getAllMembers(request: FastifyRequest, reply: FastifyReply) {
    try {
      const members = await this.memberService.findAllMembers()
      return reply.send({ members })
    } catch (error) {
      return reply.code(500).send({ message: '获取所有会员失败', error })
    }
  }

  async updateStatus(
    request: FastifyRequest<{
      Params: { id: string }
      Body: { status: MemberStatus }
    }>,
    reply: FastifyReply
  ) {
    try {
      const id = parseInt(request.params.id)
      const { status } = request.body

      const updatedMember = await this.memberService.updateStatus(id, status)

      return reply.send({
        member: {
          id: updatedMember.id,
          userId: updatedMember.userId,
          email: updatedMember.email,
          phone: updatedMember.phone,
          vipLevel: updatedMember.vipLevel,
          status: updatedMember.status,
          vipExpireTime: updatedMember.vipExpireTime,
          lastLoginAt: updatedMember.lastLoginAt,
          createdAt: updatedMember.createdAt,
          updatedAt: updatedMember.updatedAt
        }
      })
    } catch (error) {
      return reply.code(500).send({ message: '更新会员状态失败', error })
    }
  }

  async updateLastLogin(request: FastifyRequest<{ Params: { id: string } }>, reply: FastifyReply) {
    try {
      const id = parseInt(request.params.id)
      await this.memberService.updateLastLogin(id)

      return reply.send({ message: '更新最后登录时间成功' })
    } catch (error) {
      return reply.code(500).send({ message: '更新最后登录时间失败', error })
    }
  }

  async getStatistics(request: FastifyRequest, reply: FastifyReply) {
    try {
      const vipLevelStats = await this.memberService.countByVipLevel()
      const statusStats = await this.memberService.countByStatus()

      return reply.send({
        vipLevelStats,
        statusStats
      })
    } catch (error) {
      return reply.code(500).send({ message: '获取统计数据失败', error })
    }
  }
}