import json

from django.shortcuts import render
from django.shortcuts import redirect
from django.conf import settings
import django.contrib.auth
from django.contrib.auth import get_user_model

from ..item.utils import render_to_json
from ..utils import default_context

from brake.decorators import ratelimit

User = get_user_model()


@ratelimit(method="POST", block=True, rate="5/m")
def register(request):
    response = {}
    if request.method == "POST":
        data = json.loads(request.body)
        if User.objects.filter(username__iexact=data['username']).exists():
            response['error'] = 'username not allowed'
        elif User.objects.filter(email__iexact=data['email']).exists():
            response['error'] = 'username not allowed'
        elif not data['password']:
            response['error'] = 'password too simple'
        if not response:
            user = User(username=data['username'], email=data['email'].lower())
            user.set_password(data['password'])
            user.is_active = True
            user.save()
            user = django.contrib.auth.authenticate(username=data['username'], password=data['password'])
            django.contrib.auth.login(request, user)
            response['user'] = user.username
        return render_to_json(response)
    else:
        context = default_context(request)
        return render(request, 'register.html', context)


@ratelimit(method="POST", block=True, rate="5/m")
def login(request):
    context = default_context(request)
    response = {}
    request_type = 'json'
    if request.method == "POST":
        if "username" in request.POST and "password" in request.POST:
            data = request.POST
            request_type = 'html'
        else:
            data = json.loads(request.body)
        user = django.contrib.auth.authenticate(username=data['username'], password=data['password'])
        if user is not None and user.is_active:
            django.contrib.auth.login(request, user)
            response['user'] = user.username
            if request_type == 'html':
                return redirect('/')
        else:
            response['error'] = 'login failed'
            if request_type == 'html':
                context['error'] = response['error']
                return render(request, 'login.html', context)
        return render_to_json(response)
    else:
        if request.user.is_authenticated:
            return redirect('/')
        return render(request, 'login.html', context)


def logout(request):
    if request.user.is_authenticated:
        django.contrib.auth.logout(request)
    if request.method == "POST":
        data = json.loads(request.body)
        return render_to_json({})
    return redirect('/')