package com.gkhy.exam.system.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.gkhy.exam.common.api.CommonPage;
import com.gkhy.exam.common.constant.UserConstant;
import com.gkhy.exam.common.domain.entity.SysUser;
import com.gkhy.exam.common.enums.ApproveStatusEnum;
import com.gkhy.exam.common.enums.CodeTypeEnum;
import com.gkhy.exam.common.enums.UserTypeEnum;
import com.gkhy.exam.common.exception.ApiException;
import com.gkhy.exam.common.utils.PageUtils;
import com.gkhy.exam.common.utils.SecurityUtils;
import com.gkhy.exam.system.domain.ExCourse;
import com.gkhy.exam.system.domain.ExCoursePhase;
import com.gkhy.exam.system.mapper.ExCourseMapper;
import com.gkhy.exam.system.mapper.ExCoursePhaseMapper;
import com.gkhy.exam.system.mapper.ExPhaseStudentMapper;
import com.gkhy.exam.system.service.ExCoursePhaseService;
import com.gkhy.exam.system.utils.SequenceUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * <p>
 * 课时批次表 服务实现类
 * </p>
 *
 * @author kzy
 * @since 2024-06-05 15:07:36
 */
@Service
public class ExCoursePhaseServiceImpl extends ServiceImpl<ExCoursePhaseMapper, ExCoursePhase> implements ExCoursePhaseService {
    @Autowired
    private ExPhaseStudentMapper phaseStudentMapper;
    @Autowired
    private ExCourseMapper courseMapper;



    @Autowired
    private SequenceUtils sequenceUtils;

    @Override
    public CommonPage selectCoursePhaseList(ExCoursePhase coursePhase) {
        SysUser user= SecurityUtils.getLoginUser().getUser();
        if(!user.getUserType().equals(UserTypeEnum.SYSTEM_USER.getCode())){
            coursePhase.setCompanyId(user.getCompanyId());
        }
        PageUtils.startPage();
        List<ExCoursePhase> courseList=baseMapper.selectCoursePhaseList(coursePhase);
        return CommonPage.restPage(courseList);
    }

    @Override
    public ExCoursePhase selectCoursePhaseById(Long phaseId) {
        ExCoursePhase coursePhase= baseMapper.selectCoursePhaseById(phaseId);
        SysUser currentUser= SecurityUtils.getLoginUser().getUser();
        if(currentUser.getUserType().equals(UserTypeEnum.SYSTEM_USER.getCode())){
            return coursePhase;
        }
        if(!coursePhase.getCompanyId().equals(currentUser.getCompanyId())){
            throw new ApiException("无权限查看其它企业批次信息");
        }
        return coursePhase;
    }

    @Override
    public int insertCoursePhase(ExCoursePhase coursePhase) {
        checkUserAllowed(coursePhase);
        checkCourseStatus(coursePhase);
        if(!checkNameUnique(coursePhase)){
            throw new ApiException("批次名称已存在");
        }
        coursePhase.setCode(sequenceUtils.getNextSequence(CodeTypeEnum.COUSE_PHASE.getCode()));
        coursePhase.setCreateBy(SecurityUtils.getUsername());
        int row=baseMapper.insert(coursePhase);
        if(row<1){
            throw new ApiException("新增批次失败");
        }
        return row;
    }

    @Override
    public int updateCoursePhase(ExCoursePhase coursePhase) {
        checkUserAllowed(coursePhase);
        checkCourseStatus(coursePhase);
        if(!checkNameUnique(coursePhase)){
            throw new ApiException("批次名称已存在");
        }
        coursePhase.setCode(null);
        int row=baseMapper.updateById(coursePhase);
        if(row<1){
            throw new ApiException("更新批次失败");
        }
        return row;
    }

    public void checkUserAllowed(ExCoursePhase coursePhase) {
        SysUser currentUser= SecurityUtils.getLoginUser().getUser();
        if(currentUser.getUserType().equals(UserTypeEnum.SYSTEM_USER.getCode())){
            return;
        }
        if(currentUser.getUserType().equals(UserTypeEnum.STUDENT.getCode())){
            throw new ApiException("没有权限操作");
        }
        if(coursePhase.getCompanyId()!=null&&!currentUser.getCompanyId().equals(coursePhase.getCompanyId())){
            throw new ApiException("没有权限操作其他企业批次");
        }
        int level=coursePhase.getLevel();
        if((level==1 ||level==4) && currentUser.getUserType()>UserTypeEnum.COMPANY_USER.getCode()){
            throw new ApiException("当前账户无权限新增公司级批次");
        }
        if(level==2 && currentUser.getUserType()>UserTypeEnum.DEPART_USER.getCode()){
            throw new ApiException("当前账户无权限新增事业部级级批次");
        }
    }


    private void checkCourseStatus(ExCoursePhase coursePhase){
        Long courseId=coursePhase.getCourseId();
        ExCourse course= courseMapper.selectById(courseId);
        if(course.getStatus().equals(UserConstant.DISENABLE)){
            throw new ApiException("课程已禁用，不能分配");
        }
        if(!course.getState().equals(ApproveStatusEnum.APPROVED.getCode())){
            throw new ApiException("课程审批未通过，不能分配");
        }
    }

    @Override
    public int deleteCoursePhaseById(Long phaseId) {
        checkUserAllowed(baseMapper.selectById(phaseId));
        //查询该批次分配的学员人数
        int studentCount=phaseStudentMapper.countByPhaseId(phaseId);
        if(studentCount>0){
            throw new ApiException("该批次下已分配学员，不能删除");
        }
        int row=baseMapper.deleteByPhaseId(phaseId);
        if(row<1){
            throw new ApiException("删除批次失败");
        }
        return row;
    }


    @Override
    public boolean checkNameUnique(ExCoursePhase coursePhase) {
        Long phaseId=coursePhase.getId()==null?-1L:coursePhase.getId();
        ExCoursePhase phase= baseMapper.checkNameUnique(coursePhase.getName());
        if(phase!=null&&phase.getId().longValue()!=phaseId.longValue()){
            return UserConstant.NOT_UNIQUE;
        }
        return UserConstant.UNIQUE;
    }
}