package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        //设置分页
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<Setmeal> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 新增套餐
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void insert(SetmealDTO setmealDTO) {
        //插入套餐信息
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.insert(setmeal);

        //插入套餐包含菜品的信息
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        //设置setmealId
        setmealDishes.forEach(setmealDish -> setmealDish.setSetmealId(setmeal.getId()));
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //查看套餐是否有在售状态
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.selectById(id);
            if (setmeal.getStatus().equals(StatusConstant.ENABLE)) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }

        //批量删除套餐（动态SQL）
        //删除setmeal数据
        setmealMapper.deleteBatch(ids);
        //删除setmeal_dish数据
        setmealDishMapper.deleteBySetmealIds(ids);
    }

    /**
     * 根据id查询套餐（及关联菜品）
     * @param id
     * @return
     */
    @Override
    public SetmealVO getByIdWithSetmealDishes(Long id) {
        SetmealVO setmealVO = new SetmealVO();
        //查询基本套餐信息
        Setmeal setmeal = setmealMapper.selectById(id);
        BeanUtils.copyProperties(setmeal,setmealVO);
        //查询对应菜品信息
        List<SetmealDish> setmealDishes = setmealDishMapper.selectBySetmealId(id);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }
}