package com.gunshi.project.xyt.service;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.gunshi.db.dao.BaseOrderDao;
import com.gunshi.project.xyt.entity.basedata.SysDictSearch;
import com.gunshi.project.xyt.entity.basedata.SysDictVo;
import com.gunshi.project.xyt.mapper.SysDictBMapper;
import com.gunshi.project.xyt.model.SysDictB;
import com.gunshi.util.common.tree.TreeUtil;
import jakarta.validation.Valid;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Date;
import java.util.List;

/**
 * @author Sun Lejun
 * @version 1.0
 * @date 2024/1/25
 */

@Service
@Slf4j
@Transactional(rollbackFor = Exception.class)
public class SysDictService extends BaseOrderDao<SysDictBMapper, SysDictB> {

    /**
     * 根据ID查询字典
     * @param id 字典ID
     * @return 字典
     */
    public SysDictB queryById(Long id) {
        return this.getBaseMapper().selectById(id);
    }

    /**
     * 根据名称或者编码查询字典
     * @param search 查询条件
     * @return 字典tree
     */
    public Page<SysDictVo> queryBySearch(SysDictSearch search) {

        //构建分页对象
        Page<Long> page = new Page<>(search.getPage(), search.getPageSize());
        //按PID和ID进行分页查询
        Page<SysDictB> sysDictVoPage = this.getBaseMapper().queryPidBySearch(page, search);
        long total = sysDictVoPage.getTotal();
        long current = sysDictVoPage.getCurrent();
        if(total == 0) {
            return new Page<>(current, search.getPageSize());
        }
        //拿出查询出来的PID和ID，获取完整的记录
        List<SysDictB> records = sysDictVoPage.getRecords();
        List<Long> list = records.stream().map(SysDictB::getId).toList();
        List<SysDictVo> sysDictVos = this.getBaseMapper().queryByPidOrIds(list);
        //转换成tree
        List<SysDictVo> tree = TreeUtil.list2ListTree(sysDictVos, 0L, SysDictVo::getId, SysDictVo::getPid, SysDictVo::setChildren, null);
        //构建返回对象
        Page<SysDictVo> result = new Page<>(search.getPage(), search.getPageSize());
        result.setCurrent(current);
        result.setTotal(total);
        result.setRecords(tree);
        return result;
    }

    /**
     * 新增字典
     * @param sysDictB 字典信息
     */
    public void insert(@Valid SysDictB sysDictB) {
        checkExistCodeAndName(sysDictB);
        sysDictB.setId(IdWorker.getId());
        sysDictB.setStatus(1);
        sysDictB.setCreateTm(new Date());
        sysDictB.setTm(new Date());
        this.getBaseMapper().insert(sysDictB);
        resort(sysDictB);
    }

    /**
     * 更新字典
     * @param sysDictB 字典信息
     */
    public void update(@Valid SysDictB sysDictB) {
        checkExistById(sysDictB);
        checkExistCodeAndName(sysDictB);
        sysDictB.setTm(new Date());

        if(sysDictB.getStatus() == 0L){
            sysDictB.setSortOn(999);
        }
        this.getBaseMapper().updateById(sysDictB);
        resort(sysDictB);
    }

    /**
     * 检查字典编码和名称是否存在
     * @param sysDictB 字典信息
     */
    public void checkExistCodeAndName(SysDictB sysDictB) {
        if (sysDictB.getPid() != 0L) {
            return;
        }
        boolean exist = this.getBaseMapper().checkExistCodeAndName(sysDictB);
        if (exist) {
            throw new IllegalArgumentException("顶层字典编码或名称已存在");
        }
    }

    /**
     * 检查字典是否存在
     * @param sysDictB 字典信息
     */
    public void checkExistById(SysDictB sysDictB) {
        QueryWrapper<SysDictB> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq(SysDictB.COL_ID, sysDictB.getId());
        boolean exists = this.exists(queryWrapper);
        if (!exists) {
            throw new IllegalArgumentException("字典不存在");
        }
    }

    /**
     * 重新给字典排序
     * @param sysDictB
     */
    private void resort(SysDictB sysDictB){
        Long pid = sysDictB.getPid();
        QueryWrapper<SysDictB> queryWrapper2 = new QueryWrapper<>();
        queryWrapper2.eq(SysDictB.COL_PID, pid);
        super.updateOrder(queryWrapper2, SysDictB::getSortOn, SysDictB::setSortOn, sysDictB, SysDictB::getId, t -> t.setTm(new Date()));
    }


}