from django.core.mail import send_mail
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
from rest_framework.exceptions import ValidationError
from flashcards.serializers import *


class UserDetail(APIView):
    def patch(self, request, format=None):
        """
            Updates a user's password after they enter a valid old password.
            TODO: email verification
        """

        if 'old_password' not in request.data:
            raise ValidationError('Old password is required')
        if 'new_password' not in request.data:
            raise ValidationError('New password is required')
        if not request.data['new_password']:
            raise ValidationError('Password cannot be blank')

        currentuser = request.user

        if not currentuser.check_password(request.data['old_password']):
            raise ValidationError('Invalid old password')

        send_mail("Please verify your Flashy account",
                  body % currentuser.confirmation_key,
                  "noreply@flashy.cards",
                  [currentuser.email])

        currentuser.confirm_email( currentuser.confirmation_key )

        if currentuser.isconfirmed
            currentuser.set_password(request.data['new_password'])
            currentuser.save()

        return Response(status=status.HTTP_204_NO_CONTENT)

    def get(self, request, format=None):
        serializer = UserSerializer(request.user)
        return Response(serializer.data)

    def post(self, request, format=None):
        if 'email' not in request.data:
            raise ValidationError('Email is required')
        if 'password' not in request.data:
            raise ValidationError('Password is required')

        email = request.data['email']
        user = User.objects.create_user(email)

        body = '''
            Visit the following link to confirm your email address:
            http://flashy.cards/app/verify_email/%s

            If you did not register for Flashy, no action is required.
        '''

        send_mail("Please verify your Flashy account",
                  body % user.confirmation_key,
                  "noreply@flashy.cards",
                  [user.email])

        return Response(UserSerializer(User).data)