package com.qxgmat.service.inline;

import com.github.pagehelper.Page;
import com.nuliji.tools.AbstractService;
import com.nuliji.tools.exception.ParameterException;
import com.nuliji.tools.exception.SystemException;
import com.nuliji.tools.mybatis.Example;
import com.qxgmat.data.dao.ExerciseStructMapper;
import com.qxgmat.data.dao.entity.ExaminationStruct;
import com.qxgmat.data.dao.entity.ExerciseStruct;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.util.*;
import java.util.stream.Collectors;

@Service
public class ExerciseStructService extends AbstractService {
    private static final Logger logger = LoggerFactory.getLogger(ExerciseStructService.class);

    @Resource
    private ExerciseStructMapper exerciseStructMapper;

    @Cacheable(value = "exercise_struct/main")
    public List<ExerciseStruct> main(){
        List<ExerciseStruct> list = all();
        return list.stream()
                .filter((ExerciseStruct b) -> b.getLevel()<=2)
                .collect(Collectors.toList());
    }

    @Cacheable(value = "exercise_struct/children", key="#id+ '_' +#children")
    public List<ExerciseStruct> children(Integer id, Integer children){
        List<ExerciseStruct> list = all();
        List<Integer> ids = new ArrayList<>();

        return list.stream()
                .filter((ExerciseStruct b) -> {
                    if (b.getParentId().equals(id)){
                        if (children>0) ids.add(b.getId());
                        return true;
                    }else if(ids.contains(b.getParentId())){
                        if(children>0) ids.add(b.getId());
                        return true;
                    }
                    return false;
                } )
                .collect(Collectors.toList());
    }

    @Cacheable(value = "exercise_struct/parent", key="#id")
    public List<ExerciseStruct> parent(Integer id){
        List<ExerciseStruct> list = all();
        Collections.reverse(list);
        List<Integer> ids = new ArrayList<>();

        list = list.stream()
                .filter((ExerciseStruct b) -> {
                    if (b.getId().equals(id)){
                        ids.add(b.getParentId());
                        return true;
                    }else if(ids.contains(b.getId())){
                        ids.add(b.getParentId());
                        return true;
                    }
                    return false;
                } )
                .collect(Collectors.toList());
        Collections.reverse(list);
        return list;
    }

    @Cacheable(value = "exercise_struct/all")
    public List<ExerciseStruct> all(){
        Example example = new Example(ExerciseStruct.class);
        example.setOrderByClause("level asc, id asc");
        return select(exerciseStructMapper);
    }

    @CacheEvict(value={"exercise_struct/children", "exercise_struct/parent", "exercise_struct/main", "exercise_struct/all"}, allEntries=true)
    public ExerciseStruct add(ExerciseStruct struct){
        if(struct.getParentId() > 0){
            ExerciseStruct parent = get(struct.getParentId());
            struct.setLevel(parent.getLevel()+1);
            struct.setExtend(parent.getExtend());
        }else{
            struct.setLevel(1);
        }
        int result = insert(exerciseStructMapper, struct);
        struct = one(exerciseStructMapper, struct.getId());
        if(struct == null){
            throw new SystemException("添加失败");
        }
        return struct;
    }

    @CacheEvict(value={"exercise_struct/children", "exercise_struct/paper", "exercise_struct/main", "exercise_struct/all"}, allEntries=true)
    public ExerciseStruct edit(ExerciseStruct struct){
        ExerciseStruct in = one(exerciseStructMapper, struct.getId());
        if(in == null){
            throw new ParameterException("层级不存在");
        }
        if (struct.getParentId() > 0){
            ExerciseStruct parent = get(struct.getParentId());
            struct.setLevel(parent.getLevel()+1);
            struct.setExtend(parent.getExtend());
        }else{
            struct.setLevel(1);
        }
        int result = update(exerciseStructMapper, struct);
        return struct;
    }

    @CacheEvict(value={"exercise_struct/children", "exercise_struct/paper", "exercise_struct/main", "exercise_struct/all"}, allEntries=true)
    public boolean delete(Number id){
        ExerciseStruct in = one(exerciseStructMapper, id);
        if(in == null){
            throw new ParameterException("层级不存在");
        }
        int result = delete(exerciseStructMapper, id);
        return result > 0;
    }

    public ExerciseStruct get(Number id){
        ExerciseStruct in = one(exerciseStructMapper, id);

        if(in == null){
            throw new ParameterException("层级不存在");
        }
        return in;
    }

    public Page<ExerciseStruct> select(int page, int pageSize){
        return select(exerciseStructMapper, page, pageSize);
    }

    public Page<ExerciseStruct> select(Integer[] ids){
        return page(()->select(exerciseStructMapper, ids), 1, ids.length);
    }

    public List<ExerciseStruct> select(Collection ids){
        return select(exerciseStructMapper, ids);
    }

}