# Third party imports
from rest_framework import status
from rest_framework.permissions import AllowAny
from rest_framework.response import Response
from rest_framework.views import APIView
from zxcvbn import zxcvbn

## Module imports
from plane.app.serializers import (
    ChangePasswordSerializer,
    UserSerializer,
)
from plane.authentication.utils.login import user_login
from plane.db.models import User
from plane.authentication.adapter.error import (
    AuthenticationException,
    AUTHENTICATION_ERROR_CODES,
)
from django.middleware.csrf import get_token


class CSRFTokenEndpoint(APIView):

    permission_classes = [
        AllowAny,
    ]

    def get(self, request):
        # Generate a CSRF token
        csrf_token = get_token(request)
        # Return the CSRF token in a JSON response
        return Response(
            {"csrf_token": str(csrf_token)}, status=status.HTTP_200_OK
        )


class ChangePasswordEndpoint(APIView):
    def post(self, request):
        serializer = ChangePasswordSerializer(data=request.data)
        user = User.objects.get(pk=request.user.id)
        if serializer.is_valid():
            if not user.check_password(serializer.data.get("old_password")):
                exc = AuthenticationException(
                    error_code=AUTHENTICATION_ERROR_CODES[
                        "INCORRECT_OLD_PASSWORD"
                    ],
                    error_message="INCORRECT_OLD_PASSWORD",
                    payload={"error": "Old password is not correct"},
                )
                return Response(
                    exc.get_error_dict(),
                    status=status.HTTP_400_BAD_REQUEST,
                )

            # check the password score
            results = zxcvbn(serializer.data.get("new_password"))
            if results["score"] < 3:
                exc = AuthenticationException(
                    error_code=AUTHENTICATION_ERROR_CODES[
                        "INVALID_NEW_PASSWORD"
                    ],
                    error_message="INVALID_NEW_PASSWORD",
                )
                return Response(
                    exc.get_error_dict(),
                    status=status.HTTP_400_BAD_REQUEST,
                )

            # set_password also hashes the password that the user will get
            user.set_password(serializer.data.get("new_password"))
            user.is_password_autoset = False
            user.save()
            user_login(user=user, request=request)
            return Response(
                {"message": "Password updated successfully"},
                status=status.HTTP_200_OK,
            )
        exc = AuthenticationException(
            error_code=AUTHENTICATION_ERROR_CODES["INVALID_PASSWORD"],
            error_message="INVALID_PASSWORD",
        )
        return Response(
            exc.get_error_dict(),
            status=status.HTTP_400_BAD_REQUEST,
        )


class SetUserPasswordEndpoint(APIView):
    def post(self, request):
        user = User.objects.get(pk=request.user.id)
        password = request.data.get("password", False)

        # If the user password is not autoset then return error
        if not user.is_password_autoset:
            exc = AuthenticationException(
                error_code=AUTHENTICATION_ERROR_CODES["PASSWORD_ALREADY_SET"],
                error_message="PASSWORD_ALREADY_SET",
                payload={
                    "error": "Your password is already set please change your password from profile"
                },
            )
            return Response(
                exc.get_error_dict(),
                status=status.HTTP_400_BAD_REQUEST,
            )

        # Check password validation
        if not password:
            exc = AuthenticationException(
                error_code=AUTHENTICATION_ERROR_CODES["INVALID_PASSWORD"],
                error_message="INVALID_PASSWORD",
            )
            return Response(
                exc.get_error_dict(),
                status=status.HTTP_400_BAD_REQUEST,
            )

        results = zxcvbn(password)
        if results["score"] < 3:
            exc = AuthenticationException(
                error_code=AUTHENTICATION_ERROR_CODES["INVALID_PASSWORD"],
                error_message="INVALID_PASSWORD",
            )
            return Response(
                exc.get_error_dict(),
                status=status.HTTP_400_BAD_REQUEST,
            )

        # Set the user password
        user.set_password(password)
        user.is_password_autoset = False
        user.save()
        # Login the user as the session is invalidated
        user_login(user=user, request=request)
        # Return the user
        serializer = UserSerializer(user)
        return Response(serializer.data, status=status.HTTP_200_OK)