using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using AutoMapper;
using Demo.Net.DTOs;
using Demo.Net.IService;
using Deom.Net.Model;
using Deom.Net.Utils;
using Deom.Net.Utils.ClassroomUtils;
using Microsoft.AspNetCore.Mvc;

namespace NET.ProWebAPI.Controllers
{
 [ApiController]
 [Route("api/[controller]/[action]")]
 public class ClassroomController : ControllerBase
 {
 private readonly IClassroomService _classroomService;
 private readonly IMapper _mapper;


 //IMapper参数代表用于对象映射的工具。
 public ClassroomController(IClassroomService classroomService, IMapper mapper)
 {
 _classroomService = classroomService;
 _mapper = mapper;
 }

 // 查询所有教室,可以不用传参数,直接查询全部前端拿来渲染下拉框,只需要渲染id和classroomName
 [HttpGet]
 public async Task<ActionResult<ApiTotalReturns>> GetClassroomInfo(int page, int pageNum)
 {
 var res = await _classroomService.GetAllInfo();
 if (res.Count > 0 && res != null)
 {
 var resClassroomDTO = _mapper.Map<List<ClassroomDTO>>(res);

 //获取总条数
 int total = resClassroomDTO.Count;
 //计算分页
 int skip = (page - 1) * pageNum;
 //分页
 var pageResClassroomDTO = resClassroomDTO.Skip(skip).Take(pageNum).ToList();
 //返回分页数据,页码,总条数,每页条数
 return ApiReturnsHelper.Succeed(resClassroomDTO, page, pageNum, total);
 }
 return ApiReturnsHelper.FailedPag("查不到");
 }

 //添加教室
 [HttpPost]
 public async Task<ActionResult<ApiReturns>> CreateClassroom(NewClassroom newClassroom)
 {
 //检查该教室是否已经存在
 var isExist = await _classroomService.GetInfoByName(c => c.ClassroomName == newClassroom.ClassroomName);
 if (isExist != null)
 {
 return ApiReturnsHelper.Failed("该教室已存在");
 }
 else
 {
 //创建新的教室对象
 var createClassroom = new Classroom()
 {
 ClassroomName = newClassroom.ClassroomName,
 };
 // 保存新创建的教室到数据库
 var result = await _classroomService.AddInfo(createClassroom);
 if (result)
 {
 return ApiReturnsHelper.Succeed(result);
 }
 else
 {
 return ApiReturnsHelper.Failed("教室添加失败");
 }

 }

 }

 // 删除教室
 [HttpDelete("{classroomId}")]
 public async Task<ActionResult<ApiReturns>> DeleteClassroom(Guid classroomId)
 {
 var classroom = await _classroomService.GetInfoById(classroomId);
 if (classroom == null)
 {
 return ApiReturnsHelper.Failed("教室不存在");
 }

 // 检查教室是否有关联的课程
 if (classroom.Lessons != null && classroom.Lessons.Count > 0)
 {
 return ApiReturnsHelper.Failed("无法删除有关联课程的教室");
 }

 // 标记教室为已删除
 classroom.IsDeleted = true;
 var result = await _classroomService.DeleteInfo(classroom);
 if (result)
 {
 return ApiReturnsHelper.Succeed(result);
 }
 else
 {
 return ApiReturnsHelper.Failed("教室删除失败");
 }
 }



 }
}