package com.ssm.test;

import com.ssm.entity.Course;
import com.ssm.mapper.CourseMapper;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.InputStream;

public class TestCourse {
    public static void main(String[] args) {
        try {
            // 创建SqlSessionFactory
            SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(Resources.getResourceAsStream("config.xml"));
            SqlSession sqlSession = sqlSessionFactory.openSession(true);
            System.out.println("✅ MyBatis 连接成功！");

            // 获取CourseMapper
            CourseMapper courseMapper = sqlSession.getMapper(CourseMapper.class);

            // 测试添加课程 - "一二二信息"
            System.out.println("\n=== 添加课程：一二二信息 ===");
            Course newCourse = new Course();
            newCourse.setCourseName("一二二信息");
            newCourse.setCredit(3);
            newCourse.setTeacher("张老师");
            
            courseMapper.addCourse(newCourse);
            System.out.println("添加成功：" + newCourse);

            // 查询验证
            System.out.println("\n=== 查询刚添加的课程 ===");
            Course addedCourse = courseMapper.getCourseById(newCourse.getCourseId());
            if (addedCourse != null) {
                System.out.println("查询结果：" + addedCourse);
            } else {
                System.out.println("未找到该课程");
            }

            // 测试修改课程信息
            System.out.println("\n=== 修改课程信息 ===");
            addedCourse.setCourseName("一二二信息（已修改）");
            addedCourse.setCredit(4);
            addedCourse.setTeacher("李老师");
            
            courseMapper.updateCourse(addedCourse);
            System.out.println("修改成功：" + addedCourse);

            // 查询验证修改结果
            System.out.println("\n=== 查询修改后的课程 ===");
            Course updatedCourse = courseMapper.getCourseById(addedCourse.getCourseId());
            if (updatedCourse != null) {
                System.out.println("查询结果：" + updatedCourse);
            } else {
                System.out.println("未找到该课程");
            }

            // 测试通过指定id删除课程信息
            System.out.println("\n=== 通过指定id删除课程信息 ===");
            Integer deleteCourseId = addedCourse.getCourseId();
            System.out.println("即将删除课程ID：" + deleteCourseId);
            
            courseMapper.deleteCourseById(deleteCourseId);
            System.out.println("删除成功！");

            // 查询验证删除结果
            System.out.println("\n=== 查询删除后的课程（应该为空） ===");
            Course deletedCourse = courseMapper.getCourseById(deleteCourseId);
            if (deletedCourse == null) {
                System.out.println("课程已成功删除，查询结果为空");
            } else {
                System.out.println("查询结果：" + deletedCourse);
            }

            sqlSession.close();
            System.out.println("\n✅ 课程CRUD测试完成！");

        } catch (Exception e) {
            System.err.println("❌ 测试失败：");
            e.printStackTrace();
        }
    }
}