from django.shortcuts import render, redirect, get_object_or_404
from django.contrib import messages
from rest_framework import status
from rest_framework.decorators import api_view
from rest_framework.response import Response
from .models import Student
from .serializers import StudentSerializer


@api_view(['GET'])
def student_list(request):
    students = Student.objects.all()
    serializer = StudentSerializer(students, many=True)
    return Response(serializer.data)


@api_view(['POST'])
def student_create(request):
    serializer = StudentSerializer(data=request.data)
    if serializer.is_valid():
        serializer.save()
        return Response(serializer.data, status=status.HTTP_201_CREATED)
    return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)


@api_view(['GET', 'PUT', 'PATCH'])
def student_detail(request, pk):
    try:
        student = Student.objects.get(pk=pk)
    except Student.DoesNotExist:
        return Response({'error': 'Student not found'}, status=status.HTTP_404_NOT_FOUND)

    if request.method == 'GET':
        serializer = StudentSerializer(student)
        return Response(serializer.data)

    elif request.method in ['PUT', 'PATCH']:
        serializer = StudentSerializer(student, data=request.data, partial=(request.method == 'PATCH'))
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)


@api_view(['DELETE'])
def student_delete(request, pk):
    try:
        student = Student.objects.get(pk=pk)
    except Student.DoesNotExist:
        return Response({'error': 'Student not found'}, status=status.HTTP_404_NOT_FOUND)

    student.delete()
    return Response(status=status.HTTP_204_NO_CONTENT)


def student_list_ui(request):
    students = Student.objects.all()
    return render(request, 'students/student_list.html', {'students': students})


def student_create_ui(request):
    if request.method == 'POST':
        name = request.POST.get('name')
        email = request.POST.get('email')
        age = request.POST.get('age')
        course = request.POST.get('course')
        try:
            Student.objects.create(name=name, email=email, age=int(age), course=course)
            messages.success(request, 'Student added successfully.')
            return redirect('students:student-list-ui')
        except Exception as e:
            messages.error(request, f'Error: {e}')
    return render(request, 'students/student_form.html', {'title': 'Add Student'})


def student_update_ui(request, pk):
    student = get_object_or_404(Student, pk=pk)
    if request.method == 'POST':
        student.name = request.POST.get('name')
        student.email = request.POST.get('email')
        student.age = int(request.POST.get('age'))
        student.course = request.POST.get('course')
        try:
            student.save()
            messages.success(request, 'Student updated successfully.')
            return redirect('students:student-list-ui')
        except Exception as e:
            messages.error(request, f'Error: {e}')
    return render(request, 'students/student_form.html', {'title': 'Edit Student', 'student': student})


def student_delete_ui(request, pk):
    student = get_object_or_404(Student, pk=pk)
    if request.method == 'POST':
        student.delete()
        messages.success(request, 'Student deleted successfully.')
        return redirect('students:student-list-ui')
    return render(request, 'students/student_confirm_delete.html', {'student': student})