package com.xinquan.course.service.impl;

import com.alibaba.nacos.common.utils.StringUtils;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.xinquan.common.core.utils.page.CollUtils;
import com.xinquan.common.core.utils.page.PageDTO;
import com.xinquan.course.api.domain.Course;
import com.xinquan.course.api.domain.CourseChapter;
import com.xinquan.course.domain.CourseLearningRecord;
import com.xinquan.course.domain.vo.ClientCourseVO;
import com.xinquan.course.mapper.CourseMapper;
import com.xinquan.course.service.CourseService;

import java.util.List;
import java.util.Objects;
import org.springframework.stereotype.Service;

/**
 * <p>
 * 线上课程表 服务实现类
 * </p>
 *
 * @author mitao
 * @since 2024-08-21
 */
@Service
public class CourseServiceImpl extends ServiceImpl<CourseMapper, Course> implements CourseService {

    /**
     * 获取课程列表-分页
     *
     * @param courseTitle 课程标题
     * @param cateId      分类id
     * @param pageCurr    分页参数，当前页码
     * @param pageSize    分页参数，每页数量
     * @return 课程分页列表
     */
    @Override
    public PageDTO<ClientCourseVO> getCoursePageList(String courseTitle, Long cateId,
            Integer pageCurr, Integer pageSize) {
        LambdaQueryWrapper<Course> courseLambdaQueryWrapper = new LambdaQueryWrapper<>();
        if (org.springframework.util.StringUtils.hasLength(courseTitle)){
            courseLambdaQueryWrapper.like(Course::getCourseTitle, courseTitle);
        }
        if (cateId!=null && cateId.equals(1853706016887824386L)){
            courseLambdaQueryWrapper.eq(Course::getCourseType,2);
        }else if (cateId!=null){
            courseLambdaQueryWrapper.eq(Course::getCateId, cateId);
        }
        if (cateId==null){
            courseLambdaQueryWrapper.eq(Course::getRecommend,1);
        }
        courseLambdaQueryWrapper.eq(Course::getListingStatus,1);
        courseLambdaQueryWrapper.orderByDesc(Course::getSortNum);
        Page<Course> page = this.page(new Page<>(pageCurr, pageSize),courseLambdaQueryWrapper);
        if (CollUtils.isEmpty(page.getRecords())) {
            return PageDTO.empty(page);
        }

        return PageDTO.of(page, ClientCourseVO.class);
    }
}