package com.tourguide.modules.user.service;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.tourguide.common.exception.BusinessException;
import com.tourguide.modules.order.domain.OrderStatus;
import com.tourguide.modules.order.entity.TourOrder;
import com.tourguide.modules.order.mapper.TourOrderMapper;
import com.tourguide.modules.user.domain.ClientType;
import com.tourguide.modules.user.entity.MiniUser;
import com.tourguide.modules.user.mapper.MiniUserMapper;
import com.tourguide.security.JwtTokenService;
import com.tourguide.security.TokenPayload;
import com.tourguide.security.TokenSessionService;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Arrays;
import java.util.UUID;

@Service
public class MiniAccountService {
    private final MiniUserMapper miniUserMapper;
    private final TourOrderMapper tourOrderMapper;
    private final JwtTokenService jwtTokenService;
    private final TokenSessionService tokenSessionService;

    public MiniAccountService(MiniUserMapper miniUserMapper, TourOrderMapper tourOrderMapper,
                              JwtTokenService jwtTokenService, TokenSessionService tokenSessionService) {
        this.miniUserMapper = miniUserMapper;
        this.tourOrderMapper = tourOrderMapper;
        this.jwtTokenService = jwtTokenService;
        this.tokenSessionService = tokenSessionService;
    }

    @Transactional
    public void cancel(Long userId, String token) {
        TokenPayload payload = jwtTokenService.parse(token);
        if (payload.getClientType() != ClientType.MINI || !userId.equals(payload.getUserId())) {
            throw new BusinessException(401, "Token用户不匹配");
        }

        long activeOrderCount = tourOrderMapper.selectCount(new LambdaQueryWrapper<TourOrder>()
                .eq(TourOrder::getVisitorId, userId)
                .in(TourOrder::getStatus, Arrays.asList(
                        OrderStatus.PENDING_PAYMENT.getCode(),
                        OrderStatus.PENDING_ACCEPT.getCode(),
                        OrderStatus.PENDING_MEETING.getCode(),
                        OrderStatus.IN_SERVICE.getCode())));
        if (activeOrderCount > 0) {
            throw new BusinessException(409, "存在未完成订单，暂时无法注销账号");
        }

        MiniUser user = miniUserMapper.selectById(userId);
        if (user == null) {
            throw new BusinessException(404, "小程序用户不存在");
        }
        user.setUsername("deleted_" + UUID.randomUUID().toString().replace("-", "").substring(0, 24));
        user.setNickname("已注销用户");
        user.setMobile(null);
        user.setAvatar(null);
        user.setRealName(null);
        user.setIdCardNo(null);
        user.setOpenid(null);
        user.setStatus(0);
        miniUserMapper.updateById(user);
        miniUserMapper.deleteById(userId);
        tokenSessionService.remove(payload);
    }
}