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.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.Setmeal_dishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
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.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private Setmeal_dishMapper setmeal_dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    public void addDish(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        Long dishId=dish.getId();
        List<DishFlavor> flavorList=dishDTO.getFlavors();
        for(DishFlavor flavor:flavorList){
            flavor.setDishId(dishId);
        }
        dishFlavorMapper.insertBatch(flavorList);
    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        List<DishVO> dishVOList=dishMapper.list(dishPageQueryDTO);
        Page<DishVO> p= (Page<DishVO>) dishVOList;
        PageResult pageResult=new PageResult(p.getTotal(),p.getResult());
        return pageResult;
    }

    @Override
    @Transactional
    public void deleteBatch(Long[] ids) {
        for(Long id:ids){
            Dish dish=dishMapper.queryById(id);
            if(dish.getStatus()== StatusConstant.ENABLE)
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            else{
                List<Long> setmealids=setmeal_dishMapper.queryByDishId(id);
                if(setmealids!=null && setmealids.size() > 0)
                    throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
                else {
                    dishMapper.deleteById(id);
                    dishFlavorMapper.deleteByDishId(id);
                }
            }
        }
    }

    @Override
    public DishVO queryByIdWithFlavor(Long id) {
        Dish dish=dishMapper.queryById(id);
        DishVO dishVO=new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        List<DishFlavor> dishFlavors=dishFlavorMapper.queryByDishId(id);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    public void update(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        dishFlavorMapper.deleteByDishId(dishDTO.getId());   //先删再添加口味，不要在原来的上面修改！原来可能2种口味，现在3种，也无法修改！
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish=new Dish();
        dish.setId(id);
        dish.setStatus(status);
        if(status==StatusConstant.DISABLE){              //如果菜品停售，正在起售的套餐也要停售
            List<Long> setmealids=setmeal_dishMapper.queryByDishId(id);
            for(Long setmealid:setmealids){
                Setmeal setmeal=setmealMapper.getById(setmealid);
                if(StatusConstant.ENABLE == setmeal.getStatus()){            //若菜品停售，则套餐起售失败！
                    setmeal.setStatus(StatusConstant.DISABLE);
                    setmealMapper.update(setmeal);
                }
            }
        }
        dishMapper.update(dish);
    }

    @Override
    public List<Dish> list(Dish dish) {
        List<Dish> dishList=dishMapper.listByType(dish);
        return dishList;
    }

    @Override
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.listByType(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.queryByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

}