package com.ruoyi.system.service.impl;

import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import com.baomidou.mybatisplus.core.toolkit.ObjectUtils;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.ruoyi.common.basic.PageDTO;
import com.ruoyi.common.enums.ShowStatusEnum;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.common.utils.BeanUtils;
import com.ruoyi.common.utils.CollUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.system.domain.TbFieldCategory;
import com.ruoyi.system.dto.FieldCategoryDTO;
import com.ruoyi.system.dto.ShowHideDTO;
import com.ruoyi.system.dto.update.FieldCategoryUpdateDTO;
import com.ruoyi.system.mapper.TbFieldCategoryMapper;
import com.ruoyi.system.query.FieldCategoryQuery;
import com.ruoyi.system.service.TbFieldCategoryService;
import com.ruoyi.system.vo.FieldCategoryDetailVO;
import com.ruoyi.system.vo.FieldCategoryVO;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;

/**
 * <p>
 * 字段分类表 服务实现类
 * </p>
 *
 * @author mitao
 * @since 2024-03-13
 */
@Service
public class TbFieldCategoryServiceImpl extends ServiceImpl<TbFieldCategoryMapper, TbFieldCategory> implements TbFieldCategoryService {

    @Override
    public void add(FieldCategoryDTO dto) {
        //一级分类
        TbFieldCategory oneCategory = new TbFieldCategory();
        oneCategory.setFieldCategoryName(dto.getFieldCategoryName());
        oneCategory.setSortOrder(dto.getSortOrder());
        this.save(oneCategory);
        //二级分类
        List<FieldCategoryDTO> children = dto.getChildren();
        if (!CollectionUtils.isEmpty(children)) {
            children.forEach(item->{
                TbFieldCategory twoCategory = new TbFieldCategory();
                twoCategory.setParentId(oneCategory.getId());
                twoCategory.setFieldCategoryName(item.getFieldCategoryName());
                this.save(twoCategory);
                //三级分类
                List<FieldCategoryDTO> next = item.getChildren();
                if (!CollectionUtils.isEmpty(next)) {
                    next.forEach(nextItem->{
                        TbFieldCategory threeCategory = new TbFieldCategory();
                        threeCategory.setParentId(twoCategory.getId());
                        threeCategory.setFieldCategoryName(nextItem.getFieldCategoryName());
                        this.save(threeCategory);
                    });
                }
            });
        }
    }

    @Override
    public PageDTO<FieldCategoryVO> queryPage(FieldCategoryQuery query) {
        Page<TbFieldCategory> page = this.lambdaQuery()
                .like(StringUtils.isNotBlank(query.getFieldCategoryName()), TbFieldCategory::getFieldCategoryName, query.getFieldCategoryName())
                .eq(ObjectUtils.isNotEmpty(query.getStatus()), TbFieldCategory::getStatus, query.getStatus())
                .eq(TbFieldCategory::getParentId, 0)
                .orderByDesc(TbFieldCategory::getCreateTime)
                .page(new Page<>(query.getPageNum(), query.getPageSize()));
        if (CollUtils.isEmpty(page.getRecords())) {
            return PageDTO.empty(page);
        }
        return PageDTO.of(page, FieldCategoryVO.class);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void showHide(ShowHideDTO dto) {
        updateCategoryAndChildren(dto.getId(), dto.getStatus());
    }

    private void updateCategoryAndChildren(Long id, ShowStatusEnum status) {
        TbFieldCategory category = this.validateParam(id);
        this.lambdaUpdate()
                .eq(TbFieldCategory::getId, id)
                .set(TbFieldCategory::getStatus, status)
                .update();
        List<TbFieldCategory> children = this.lambdaQuery().eq(TbFieldCategory::getParentId, category.getId()).list();
        if (CollUtils.isNotEmpty(children)) {
            List<Long> childIds = children.stream().map(TbFieldCategory::getId).collect(Collectors.toList());
            childIds.forEach(childId -> updateCategoryAndChildren(childId, status));
        }
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void deleteChildren(Long id) {
        //认定为二级分类
        TbFieldCategory category = this.getById(id);
        if (Objects.nonNull(category)) {
            //查询是否有三级分类
            List<TbFieldCategory> threeCategoryList = this.lambdaQuery().eq(TbFieldCategory::getParentId, id).list();
            if (CollectionUtils.isNotEmpty(threeCategoryList)) {
                List<Long> ids = threeCategoryList.stream().map(TbFieldCategory::getId).collect(Collectors.toList());
                //删除该二级分类下面的三级分类
                this.removeByIds(ids);
            }
            //删除二级分类
            this.removeById(id);
        }
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void delete(Long id) {
        //一级分类
        validateParam(id);
        //查询是否有二级分类
        List<TbFieldCategory> threeCategoryList = this.lambdaQuery().eq(TbFieldCategory::getParentId, id).list();
        if (CollectionUtils.isNotEmpty(threeCategoryList)) {
            List<Long> ids = threeCategoryList.stream().map(TbFieldCategory::getId).collect(Collectors.toList());
            //查询三级分类
            List<TbFieldCategory> list = this.lambdaQuery().in(TbFieldCategory::getParentId, ids).list();
            if (CollectionUtils.isNotEmpty(list)) {
                List<Long> ids1 = list.stream().map(TbFieldCategory::getId).collect(Collectors.toList());
                //删除三级分类
                this.removeByIds(ids1);
            }
            //删除二级分类
            this.removeByIds(ids);
        }
        //删除一级分类
        this.removeById(id);
    }

    private TbFieldCategory validateParam(Long id) {
        TbFieldCategory category = this.getById(id);
        if (Objects.isNull(category)) {
            throw new ServiceException("非法参数");
        }
        return category;
    }

    @Override
    public void edit(FieldCategoryUpdateDTO dto) {
        validateParam(dto.getId());
        //更新一级分类
        updateCategory(dto);
        List<FieldCategoryUpdateDTO> children = dto.getChildren();
        //更新二级分类
        if (!CollectionUtils.isEmpty(children)) {
            children.forEach(item->{
                updateCategory(item);
                //三级分类
                List<FieldCategoryUpdateDTO> next = item.getChildren();
                if (!CollectionUtils.isEmpty(next)) {
                    next.forEach(this::updateCategory);
                }
            });
        }
    }

    private void updateCategory(FieldCategoryUpdateDTO dto) {
        if (dto == null) return;
        this.lambdaUpdate()
                .set(TbFieldCategory::getFieldCategoryName, dto.getFieldCategoryName())
                .set(Objects.nonNull(dto.getSortOrder()),TbFieldCategory::getSortOrder, dto.getSortOrder())
                .eq(TbFieldCategory::getId, dto.getId())
                .update();
    }

    @Override
    public List<FieldCategoryVO> queryFieldCategories(Long id) {
        List<TbFieldCategory> list = this.lambdaQuery()
                .select(TbFieldCategory::getId,TbFieldCategory::getFieldCategoryName)
                .eq(TbFieldCategory::getParentId, id)
                .eq(TbFieldCategory::getStatus, ShowStatusEnum.SHOW)
                .list();
        return BeanUtils.copyList(list, FieldCategoryVO.class);
    }

    @Override
    public FieldCategoryDetailVO getDetailsById(Long id) {
        TbFieldCategory oneCategory = this.getById(id);
        if (Objects.isNull(oneCategory)) {
            return new FieldCategoryDetailVO();
        }
        FieldCategoryDetailVO vo = BeanUtils.copyBean(oneCategory, FieldCategoryDetailVO.class);
        //根据一级分类id，查询二级分类
        List<TbFieldCategory> twoCategoryList = this.lambdaQuery().eq(TbFieldCategory::getParentId, oneCategory.getId()).list();
        twoCategoryList.forEach(item->{
            FieldCategoryDetailVO twoCategoryVO = BeanUtils.copyBean(item, FieldCategoryDetailVO.class);
            vo.getChildren().add(twoCategoryVO);
            //根据二级分类id，查询三级分类
            List<TbFieldCategory> threeCategoryList = this.lambdaQuery().eq(TbFieldCategory::getParentId, item.getId()).list();
            threeCategoryList.forEach(threeCategory->{
                FieldCategoryDetailVO threeCategoryVO = BeanUtils.copyBean(threeCategory, FieldCategoryDetailVO.class);
                twoCategoryVO.getChildren().add(threeCategoryVO);
            });
        });
        return vo;
    }
}