package com.supervision.police.service.impl;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.lang.Assert;
import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.conditions.Wrapper;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.supervision.common.domain.R;
import com.supervision.common.utils.IPages;
import com.supervision.common.utils.StringUtils;
import com.supervision.police.domain.ComDictionary;
import com.supervision.police.dto.DictionaryByTypeParam;
import com.supervision.police.mapper.ComDictionaryMapper;
import com.supervision.police.service.ComDictionaryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * <p>
 *  服务实现类
 * </p>
 *
 * @author baomidou
 * @since 2022-03-16
 */
@Service
public class ComDictionaryServiceImpl extends ServiceImpl<ComDictionaryMapper, ComDictionary> implements ComDictionaryService {

    @Autowired
    private ComDictionaryMapper comDictionaryMapper;

    @Override
    public R<?> findDictionaryInfo(ComDictionary dictionary, Long page, Long size) {
        LambdaQueryWrapper<ComDictionary> lambdaQueryWrapper = Wrappers.lambdaQuery();
        lambdaQueryWrapper
                .eq(dictionary.getId() != null, ComDictionary::getId, dictionary.getId())
                .eq(StringUtils.isNotBlank(dictionary.getValue()), ComDictionary::getValue, dictionary.getValue())
                .eq(StringUtils.isNotBlank(dictionary.getType()), ComDictionary::getType, dictionary.getType())
                .eq(dictionary.getPid() != null, ComDictionary::getPid, dictionary.getPid())
                .eq(ComDictionary::getDataStatus, "1")
                .isNotNull(ComDictionary::getValue);
        IPage<ComDictionary> iPage = new Page<>(page, size);
        iPage = comDictionaryMapper.selectPage(iPage, lambdaQueryWrapper);
        return R.ok(IPages.buildDataMap(iPage.getRecords(), iPage.getRecords().size()));
    }

    /**
     * 通过type查询字典
     * @param dictionaryByTypeParam
     * @return
     */
    @Override
    public R<?> findDictionaryListByType(DictionaryByTypeParam dictionaryByTypeParam) {
        Map<String, List<ComDictionary>> resultMap = queryDictionary(dictionaryByTypeParam);
        return R.ok(resultMap);
    }

    @Override
    public Map<String, String> getDictionaryMap(String type) {
        if (StrUtil.isEmpty(type)){
            return null;
        }
        List<ComDictionary> list = super.lambdaQuery().eq(ComDictionary::getType, type).ne(ComDictionary::getPid,0L).list();
        return list.stream().collect(Collectors.toMap(ComDictionary::getValue, ComDictionary::getLabel));
    }

    @Override
    public Map<String, String> getDictionaryMapReverse(String type) {
        if (StrUtil.isEmpty(type)){
            return null;
        }
        List<ComDictionary> list = super.lambdaQuery().eq(ComDictionary::getType, type).ne(ComDictionary::getPid,0L).list();
        return list.stream().collect(Collectors.toMap(ComDictionary::getLabel,ComDictionary::getValue));
    }

    /**
     * 根据条件查询字典表,供内部调用.
     * @param dictionaryByTypeParam
     * @return
     */
    private Map<String, List<ComDictionary>> queryDictionary(DictionaryByTypeParam dictionaryByTypeParam) {
        Map<String,List<ComDictionary>> resultMap = new HashMap<>();

        List<String> typeList = CollUtil.isEmpty(dictionaryByTypeParam.getList()) ?
                comDictionaryMapper.queryAllType() : dictionaryByTypeParam.getList();

        for (String dictType : typeList) {
            List<ComDictionary> queryList;
            List<ComDictionary> otherList = new ArrayList<>();
            ComDictionary comDictionary = new ComDictionary();
            comDictionary.setType(dictType);
            comDictionary.setDataStatus(dictionaryByTypeParam.getStatus());
            Wrapper<ComDictionary> wrapper = Wrappers.query(comDictionary);
            queryList = this.comDictionaryMapper.selectList(wrapper);
            changeTree(queryList,otherList);

            if (CollUtil.size(otherList) > 1) {
                // 平铺数据
                if (Integer.valueOf(0).equals(dictionaryByTypeParam.getIsTree())) {
                    resultMap.put(dictType,queryList);
                }else {
                    // 树形数据
                    resultMap.put(dictType,otherList);
                }
            } else {
                // 平铺数据
                if (Integer.valueOf(0).equals(dictionaryByTypeParam.getIsTree())){
                    resultMap.put(dictType,CollUtil.isNotEmpty(otherList) ? otherList.get(0).getChild() : new ArrayList<>());
                }else {
                    // 树形数据
                    resultMap.put(dictType,otherList);
                }
            }
        }
        return resultMap;
    }


    @Override
    public R<?> insertDictionary(ComDictionary dictionary) {

        Assert.notEmpty(dictionary.getType(), "字典类型不能为空");
        Assert.notEmpty(dictionary.getLabel(), "字典名称不能为空");

        comDictionaryMapper.insert(dictionary);
        return R.okMsg("新增成功");
    }

    @Override
    public R<?> updateDictionary(ComDictionary dictionary) {
        try{
            comDictionaryMapper.updateById(dictionary);
            return R.okMsg("更新成功");
        }catch (Exception e) {
            return R.fail("更新失败");
        }
    }

    @Override
    public R<?> logicDeleteDictionary(Long id) {
        if (comDictionaryMapper.updateDataStatusByIdAndPid(id) > 0) {
            return R.okMsg("更新成功");
        } else {
            return R.fail(700,"未找到该条数据的信息.");
        }
    }

    private void changeTree(List<ComDictionary> queryList, List<ComDictionary> resultList) {
        // 先找到所有的一级菜单
        for (ComDictionary comDictionary : queryList) {
            // 一级菜单没有parentId
            if (Long.valueOf(0L).equals(comDictionary.getPid())) {
                resultList.add(comDictionary);
            }
        }
        // 为一级菜单设置子菜单，getChild是递归调用的
        for (ComDictionary comDictionary : resultList) {
            comDictionary.setPid(0L);
            comDictionary.setChild(getChild(comDictionary.getId(), queryList));
        }
    }

    /**
     * 递归查找子菜单
     *
     *
     * @param id       当前菜单id
     * @param dictionaryList 要查找的列表
     * @return
     */
    private List<ComDictionary> getChild(Long id, List<ComDictionary> dictionaryList) {
        // 子菜单
        List<ComDictionary> childList = new ArrayList<>();
        for (ComDictionary comDictionary : dictionaryList) {
            if (comDictionary.getPid() != null && comDictionary.getPid().equals(id)) {
                childList.add(comDictionary);
            }
        }
        // 把子菜单的子菜单再循环一遍
        for (ComDictionary comDictionary : childList) {
            // 直接递归
            comDictionary.setChild(getChild(comDictionary.getId(), dictionaryList));
        } // 递归退出条件
        if (childList.size() == 0) {
            return null;
        }
        return childList;
    }

    @Override
    public String getName(List<ComDictionary> list, String type, String value) {
        for (ComDictionary comDictionary : list) {
            // 父级字典项的value是null
            if (comDictionary.getType().equals(type) && comDictionary.getValue() != null
                    && comDictionary.getValue().equals(value)) {
                return comDictionary.getLabel();
            }
        }
        return "";
    }

    @Override
    public String getValue(List<ComDictionary> list, String type, String label) {
        for (ComDictionary comDictionary : list) {
            if (comDictionary.getType().equals(type) && comDictionary.getLabel().equals(label)) {
                return comDictionary.getValue();
            }
        }
        return "";
    }

    @Override
    public Boolean updateCategory(ComDictionary dictionary) {

        Assert.notNull(dictionary.getId(), "id不能为空");
        Assert.notEmpty(dictionary.getLabel(), "字典名称不能为空");
        this.lambdaUpdate().eq(ComDictionary::getId,dictionary.getId())
                .set(ComDictionary::getNote,dictionary.getNote())
                .set(ComDictionary::getLabel,dictionary.getLabel()).update();
        return true;
    }

}