from django.shortcuts import render

# Create your views here.
from django.http import JsonResponse
from teacher.models import Teacher
from django.views.decorators.csrf import csrf_exempt
from io import BytesIO
from django.http.multipartparser import MultiPartParser
from django.http import QueryDict
from course.models import Course, SC
from Student.models import Student
from django.db.models import Q
from django.db.models import Subquery, OuterRef
from django.core.exceptions import ObjectDoesNotExist

from EduSystemServer.utils import ResponseUtil
@csrf_exempt
def teacher_manage(request): # 教师个人信息修改
    if request.method == "POST":
        username = request.POST.get('username')
        password = request.POST.get('password')
        name = request.POST.get('name')
        sex = request.POST.get('sex')
        title = request.POST.get('title')
        education = request.POST.get('education')
        dept = request.POST.get('dept')
        if (username and password and name and sex
                and title and education and dept):
            teacher = Teacher()
            teacher.username = username
            teacher.password = password
            teacher.name = name
            teacher.sex = sex
            teacher.title = title
            teacher.education = education
            teacher.dept = dept
            teacher.save()
            response = ResponseUtil.ok(teacher.to_dict(), "老师信息插入成功")
            return JsonResponse(response)
        else:
            response = ResponseUtil.error("老师信息插入未成功，存在空值，请你仔细检测并上传")
            return JsonResponse(response)

    elif request.method == "GET":
        name = request.GET.get('name')
        sex = request.GET.get('sex')
        title = request.GET.get('title')
        education = request.GET.get('education')
        dept = request.GET.get('dept')
        # 定义空查询条件
        conditions = Q()
        if name:
            conditions &= Q(name=name)
        if sex:
            conditions &= Q(sex=sex)
        if title:
            conditions &= Q(title=title)
        if education:
            conditions &= Q(education=education)
        if dept:
            conditions &= Q(dept=dept)
        # 添加非空查询条件至基本查询集
        query = Teacher.objects.filter(conditions)
        data = query.values()  # 将 QuerySet 对象转换为字典列表
        data = list(data)  # 转换为列表以便序列化为 JSON
        print(query)
        response = ResponseUtil.ok(data, "老师信息查询成功")
        return JsonResponse(response)

    elif request.method == "DELETE":
        parser = MultiPartParser(request.META, BytesIO(request.body), request.upload_handlers, request.encoding)
        posdict = parser.parse()
        print(posdict)
        tid = int(posdict[0]['tid'])
        print(tid)
        try:
            info = Teacher.objects.filter(tid=tid).get().to_dict()
            Teacher.objects.filter(tid=tid).delete()
            response = ResponseUtil.ok(info, "老师信息删除成功")
            return JsonResponse(response)
        except:
            response = ResponseUtil.error("删除失败，未找到老师信息！")
            return JsonResponse(response)
    elif request.method == 'PUT':
        put = MultiPartParser(request.META, request, request.upload_handlers, request.encoding).parse()
        # request.PUT = put[0]
        print(put)
        tid = put[0]['tid']
        name = put[0]['name']
        sex = put[0]['sex']
        title = put[0]['title']
        education = put[0]['education']
        dept = put[0]['dept']
        if name and sex and title and education and dept:
            Teacher.objects.filter(tid=tid).update(name=name,sex=sex,title=title)
            Teacher.objects.filter(tid=tid).update(education=education,dept=dept)
            data = Teacher.objects.filter(tid=tid)[0].to_dict()
            response = ResponseUtil.ok(data, "修改老师信息成功！")
            return JsonResponse(response)
        else:
            response = ResponseUtil.error("修改信息有误！")
            return JsonResponse(response)