package com.mzl.flower.service.film.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.mzl.flower.config.exception.ValidationException;
import com.mzl.flower.config.security.SecurityUtils;
import com.mzl.flower.dto.BatchDTO;
import com.mzl.flower.dto.request.film.FilmLocationDTO;
import com.mzl.flower.dto.request.film.FilmLocationQueryDTO;
import com.mzl.flower.dto.response.film.FilmLocationNameDTO;
import com.mzl.flower.dto.response.film.FilmLocationVO;
import com.mzl.flower.dto.response.film.FilmWorksVO;
import com.mzl.flower.entity.film.FilmLocation;
import com.mzl.flower.entity.film.FilmLocationWork;
import com.mzl.flower.entity.system.Role;
import com.mzl.flower.mapper.film.FilmLocationMapper;
import com.mzl.flower.mapper.film.FilmLocationWorkMapper;
import com.mzl.flower.mapper.film.FilmWorksMapper;
import com.mzl.flower.service.film.FilmLocationService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.mzl.flower.service.film.FilmLocationWorkService;
import com.mzl.flower.service.system.RoleService;
import lombok.RequiredArgsConstructor;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;
import org.springframework.util.ObjectUtils;
import org.springframework.util.StringUtils;

import java.util.*;
import java.util.stream.Collectors;

/**
 * <p>
 * 影视拍摄场地信息表 服务实现类
 * </p>
 *
 * @author generator@Fang
 * @since 2025-05-20
 */
@Service
@Transactional
@RequiredArgsConstructor
public class FilmLocationServiceImpl extends ServiceImpl<FilmLocationMapper, FilmLocation> implements FilmLocationService {

    private final FilmLocationMapper filmLocationMapper;
    private final RoleService roleService;
    private final FilmLocationWorkMapper filmLocationWorkMapper;

    private final FilmWorksMapper filmWorksMapper;
    private final FilmLocationWorkService filmLocationWorkService;

    @Override
    public void saveFilmLocation(FilmLocationDTO filmLocationDTO) {
        //  转换
        //增加保存时判断是否有景点名称
        if (StringUtils.isEmpty(filmLocationDTO.getLocationName())) {
            throw new ValidationException("景点名称不能为空");
        }
        FilmLocation filmLocation1 = filmLocationMapper.selectByLocationName(filmLocationDTO.getLocationName());
        if (!ObjectUtils.isEmpty(filmLocation1)) {
            throw new ValidationException("景点名称重复");
        }
        FilmLocation filmLocation = new FilmLocation();
        BeanUtils.copyProperties(filmLocationDTO, filmLocation);
        filmLocation.create();
        filmLocationMapper.insert(filmLocation);
        //此处传入参数是否有影视作品ID,如果不等于空，则需要保存关联关系
        if (!StringUtils.isEmpty(filmLocationDTO.getFilmId())) {
            FilmLocationWork filmLocationWork = new FilmLocationWork();
            filmLocationWork.setFilmId(filmLocationDTO.getFilmId());
            filmLocationWork.setLocationId(filmLocation.getId());
            filmLocationWorkMapper.insert(filmLocationWork);
        }
    }

    @Override
    public void updateFilmLocation(FilmLocationDTO filmLocationDTO) {
        if (StringUtils.isEmpty(filmLocationDTO.getLocationName())) {
            throw new ValidationException("景点名称不能为空");
        }

        //增加修改时保存得景点名称是否有重复，排除当前这条
        FilmLocation filmLocation1 = filmLocationMapper.selectByLocationName(filmLocationDTO.getLocationName());

        FilmLocation filmLocation = filmLocationMapper.selectById(filmLocationDTO.getId());
        if (!filmLocation1.getId().equals(filmLocation.getId())) {
            throw new ValidationException("景点名称重复");
        }
        BeanUtils.copyProperties(filmLocationDTO, filmLocation,"filmId","startDate","endDate","visitorPhotos","isEnabled","transportGuide");
        filmLocation.update(SecurityUtils.getUserId());
        filmLocationMapper.updateById(filmLocation);
    }

    @Override
    public void deleteFilmLocation(String id) {
        FilmLocation filmLocation = filmLocationMapper.selectById(id);
        if (filmLocation == null) {
            throw new ValidationException("找不到id为" + id + "的景点");
        }
        //判断景点id是否有对应得影视作品,如果有则不能删除。如果没有则可以删除
        //可能需要增加判断，如果是取消生成应该也可以删除，重新生成需要重新生成新的位置信息（取消生成的话，其实也没有对应的景点信息，这点其实暂时不用考虑）
        List<FilmLocationWork> filmLocationWorks = filmLocationWorkMapper.getByLocaltionId(id);
        if(!CollectionUtils.isEmpty(filmLocationWorks)){
            throw new ValidationException("景点有对应得影视作品，无法删除");
        }
        filmLocationMapper.deleteById(id);
    }

    @Override
    public Page<FilmLocationVO> queryPage(FilmLocationQueryDTO dto, Page page) {

        List<FilmLocationVO> list = filmLocationMapper.queryPage(dto, page);
        page.setRecords(list);
        return page;
    }

    @Override
    public FilmLocationVO detail(Long id) {
        FilmLocationVO filmLocationVO = filmLocationMapper.selectByIdInfo(id);
        if (filmLocationVO == null) {
            return null;
        }
        return filmLocationVO;
    }

    @Override
    public void changeDownState(Long id) {

        //获取当前人员角色，判断是不是审核角色
        List<String> roleIds = new ArrayList<>();
        List<Role> roleList = roleService.getUserRoleList(SecurityUtils.getUserId());
        for (Role role : roleList) {
            roleIds.add(role.getId());
        }

        if (!roleIds.contains("77462b362bad4c88a7a5c64cbdd25d91")) {
            throw new ValidationException("非运营角色不能清除权重");
        }

        FilmLocation filmLocation = filmLocationMapper.selectById(id);
        if (filmLocation == null) {
            throw new ValidationException("找不到id为" + id + "的景点");
        }

        filmLocation.setLocationWeight((double) 0);

        filmLocationMapper.updateById(filmLocation);

    }

    @Override
    public void isEnable(Long id) {
        FilmLocation filmLocation = filmLocationMapper.selectById(id);
        if (filmLocation == null) {
            throw new ValidationException("找不到id为" + id + "的景点");
        }
        if (filmLocation.getIsEnabled()) {
            filmLocation.setIsEnabled(false);
        } else {
            filmLocation.setIsEnabled(true);
        }
        filmLocation.update(SecurityUtils.getUserId());
        filmLocationMapper.updateById(filmLocation);
    }

    @Override
    @Transactional
    public void batchMerge(BatchDTO dto) {
        //获取当前人员角色，判断是不是审核角色
//        List<String> roleIds = new ArrayList<>();
//        List<Role> roleList = roleService.getUserRoleList(SecurityUtils.getUserId());
//        for (Role role : roleList) {
//            roleIds.add(role.getId());
//        }
        // 权限校验：仅允许运营角色操作
        List<String> roleIds = roleService.getUserRoleList(SecurityUtils.getUserId()).stream().map(Role::getId).collect(Collectors.toList());
        if (!roleIds.contains("77462b362bad4c88a7a5c64cbdd25d91")) {
            throw new ValidationException("非运营角色不能合并");
        }
        if (dto.getIds() == null || dto.getIds().size() < 2) {
            throw new ValidationException("至少选中两条数据");
        }

        List<Long> idList = dto.getIds();
        List<FilmLocation> sortedList = idList.stream().map(id -> filmLocationMapper.selectById(id)).filter(Objects::nonNull).collect(Collectors.toList());

        // 检查有效记录数
        if (sortedList.size() < 2) {
            throw new ValidationException("有效数据不足两条");
        }
        // 获取目标记录（第一条）和待合并记录
        FilmLocation target = sortedList.get(0);
        List<FilmLocation> toMergeList = sortedList.subList(1, sortedList.size());
        List<Long> mergeIds = toMergeList.stream().map(FilmLocation::getId).collect(Collectors.toList());

        // 更新关联表的外键引用
        updateLocationRelations(target.getId(), mergeIds);

        // 删除待合并记录
        filmLocationMapper.deleteBatchIds(mergeIds);

    }

    @Override
    @Transactional
    public void batchDelete(BatchDTO dto) {
        if (CollectionUtils.isEmpty(dto.getIds())) {
            throw new ValidationException("删除ID列表不能为空");
        }

        Set<Long> protectedIds = filmLocationWorkMapper.findLocationIdsWithWorks(dto.getIds());
        if (!protectedIds.isEmpty()) {
            Map<Long, FilmLocationNameDTO> locationDTOs = filmLocationMapper.getLocationNamesByIds(
                    new ArrayList<>(protectedIds)
            );

            String errorMsg = protectedIds.stream()
                    .map(id -> {
                        FilmLocationNameDTO locationNameDTO = locationDTOs.get(id);
                        String name = (locationNameDTO != null && locationNameDTO.getName() != null) ?
                                locationNameDTO.getName() : "未知景点";
                        return String.format("%s(ID:%d)", name, id);
                    })
                    .collect(Collectors.joining("、"));

            throw new ValidationException("以下景点有对应的影视作品，无法删除: " + errorMsg);
        }

        filmLocationMapper.deleteBatchIds(dto.getIds());

    }

    @Override
    public List<FilmWorksVO> related(Long locationId) {
        List<Long> ids = new ArrayList<>();
        ids.add(locationId);
        Set<Long> filmIds = filmLocationWorkMapper.findFilmIdsWithWorks(ids);
        if (!filmIds.isEmpty()) {
            List<FilmWorksVO> filmWorksVOS = filmWorksMapper.getFilmWorksByIds(new ArrayList<>(filmIds));
            return filmWorksVOS;
        } else {
            return null;
        }
    }

    @Override
    public List<FilmLocationVO> getFilmLocationListTop3() {
        return filmLocationMapper.getFilmLocationListTop3();
    }

    private void updateLocationRelations(Long targetId, List<Long> mergeIds) {
        // 查询所有待更新的工作记录
        LambdaQueryWrapper<FilmLocationWork> query = new LambdaQueryWrapper<>();
        query.in(FilmLocationWork::getLocationId, mergeIds);
        List<FilmLocationWork> records = filmLocationWorkService.list(query);

        // 准备更新
        List<FilmLocationWork> toUpdate = records.stream().map(work -> {
            FilmLocationWork update = new FilmLocationWork();
            update.setId(work.getId());
            update.setLocationId(targetId);
            return update;
        }).collect(Collectors.toList());

        // 批量更新（MP的批量更新方法）
        if (!toUpdate.isEmpty()) {
            filmLocationWorkService.updateBatchById(toUpdate);
        }
    }

}