from django.shortcuts import render
# Create your views here.
from django.http import JsonResponse
from EduSystemServer.utils import ResponseUtil
from .models import Student
from django.views.decorators.csrf import csrf_exempt
from django.http import QueryDict
from io import BytesIO
from django.http.multipartparser import MultiPartParser
import json


@csrf_exempt
def studnets(request):
    if request.method == "POST":
        try:
            request_data = json.loads(request.body)
            print(request_data)
            student = Student.objects.filter(sid=request_data.get("sid")).first()
            student.username = request_data.get("username")
            student.password = request_data.get("password")
            student.name = request_data.get("name")
            student.sex = request_data.get("sex")
            student.grade = request_data.get("grade")
            student.class_name = request_data.get("class_name")
            student.major = request_data.get("major")
            student.save()
            response = ResponseUtil.ok(student.to_dict(), "添加成功！")
            return JsonResponse(response)
        except Exception as E:
            return JsonResponse(ResponseUtil.error(E))
    elif request.method == "GET":
        sid = request.GET.get('sid')
        name = request.GET.get('name')
        sex = request.GET.get('sex')
        grade = request.GET.get('grade')
        class_name = request.GET.get('class_name')
        major = request.GET.get('major')
        data = []
        if sid:
            filtered = Student.objects.filter(sid=sid)
            for student in filtered:
                data.append(student.to_dict())
        elif name:
            filtered = Student.objects.filter(name=name)
            for student in filtered:
                data.append(student.to_dict())
        elif sex:
            filtered = Student.objects.filter(sex=sex)
            for student in filtered:
                data.append(student.to_dict())
        elif grade:
            filtered = Student.objects.filter(grade=grade)
            for student in filtered:
                data.append(student.to_dict())
        elif class_name:
            filtered = Student.objects.filter(class_name=class_name)
            for student in filtered:
                data.append(student.to_dict())
        elif major:
            filtered = Student.objects.filter(major=major)
            for student in filtered:
                data.append(student.to_dict())
        else:
            all_objects = Student.objects.all()
            for studnet in all_objects:
                data.append(studnet.to_dict())
        response = ResponseUtil.ok(data, "查询成功！")
        return JsonResponse(response)
    elif request.method == "DELETE":
        parser = MultiPartParser(request.META, BytesIO(request.body), request.upload_handlers, request.encoding)
        post_dict = parser.parse()
        sid = post_dict[0]['sid']
        try:
            info = Student.objects.filter(sid=sid).get().to_dict()
            Student.objects.filter(sid=sid).delete()
            response = ResponseUtil.ok(info, "删除成功！")
            return JsonResponse(response)
        except:
            return JsonResponse(ResponseUtil.error("删除失败，未找到学生信息！"))
    elif request.method == "PUT":
        put = MultiPartParser(request.META, request, request.upload_handlers, request.encoding).parse()
        sid = put[0]['sid']
        username = put[0]['username']
        name = put[0]['name']
        sex = put[0]['sex']
        grade = put[0]['grade']
        class_name = put[0]['class_name']
        major = put[0]['major']
        try:
            Student.objects.filter(sid=sid).update(username=username, name=name, sex=sex, grade=grade,
                                                   class_name=class_name,
                                                   major=major)
        except:
            Student.objects.create(sid=sid, username=username, name=name, sex=sex, grade=grade,
                                   class_name=class_name,
                                   major=major)
        data = Student.objects.filter(sid=sid)[0].to_dict()
        return JsonResponse(ResponseUtil.ok(data, "修改成功！"))


def get_select_course_by_id(request):

    pass