import json

from django.http import JsonResponse
from oauth2_provider.decorators import protected_resource

from users.forms import SocialNetworksForm, UserForm
from users.models import User, SocialNetworks


def user_view(request, user_id=None):
    if user_id is None:
        return JsonResponse({'status': 400, 'error': 'No se entrego un user_id'}, status=400)

    user = User.objects.filter(pk=user_id)
    if user.count() != 1:
        return JsonResponse({'status': 404, 'error': f'No existe un usuario con id {user_id}'}, status=404)
    user = user[0]

    if request.method == 'GET':
        return _get_user(request, user)
    if request.method == 'PUT':
        return _put_user(request, user)


def _get_user(request, user):
    encoded_user = {
        'id': user.id,
        'username': user.username,
        'email': user.email,
    }

    return JsonResponse(encoded_user)


@protected_resource()
def _put_user(request, user):
    if request.user.id != user.id and not request.user.is_admin:
        return JsonResponse({'status': 403,
                             'error': 'El usuario no tiene permiso para hacer esta acción'},
                            status=403)

    request_data = json.loads(request.body.decode('utf8'))
    form = UserForm(request_data, instance=user)

    if not form.is_valid():
        return JsonResponse({'status': 400, 'error': form.errors.as_json()}, status=400)

    form.save()

    return JsonResponse({'status': 200}, status=200)


def social_networks_view(request, user_id=None):
    if user_id is None:
        return JsonResponse({'status': 400, 'error': 'No se entrego un user_id'}, status=400)

    social_networks = SocialNetworks.objects.filter(user_id=user_id)
    if social_networks.count() != 1:
        return JsonResponse({'status': 404, 'error': f'No existe redes sociales de un usuario con id {user_id}'},
                            status=404)

    social_networks = social_networks[0]

    if request.method == 'GET':
        return _get_social_networks(request, social_networks)
    if request.method == 'PUT':
        return _update_social_networks(request, social_networks)


def _get_social_networks(request, social_networks):
    encoded_social_networks = {
        'twitter': social_networks.twitter,
        'facebook': social_networks.facebook,
        'instagram': social_networks.instagram,
        'youtube': social_networks.youtube,
        'twitch': social_networks.twitch
    }

    return JsonResponse(encoded_social_networks)


@protected_resource()
def _update_social_networks(request, social_networks):
    if request.user.id != social_networks.user_id and not request.user.is_admin:
        return JsonResponse({'status': 403,
                             'error': 'El usuario no tiene permiso para hacer esta acción'},
                            status=403)

    request_data = json.loads(request.body.decode('utf8'))
    form = SocialNetworksForm(request_data, instance=social_networks)

    if not form.is_valid():
        return JsonResponse({'status': 400, 'error': form.errors.as_json()}, status=400)

    form.save()
    return JsonResponse({'status': 200}, status=200)