import datetime
import hashlib
import os
import stripe

from accounts.models import UserProfile
from annoying.decorators import ajax_request, render_to
from blogs.views import blog_list
from django.conf import settings
from django.contrib.auth.decorators import login_required
from django.contrib.auth.models import User
from django.core.mail import send_mail
from django.db.models import Count
from django.http import HttpResponseRedirect, HttpResponseBadRequest
from django.shortcuts import render_to_response
from django.template import RequestContext
from snipts.models import Snipt
from snipts.utils import get_lexers_list
from taggit.models import Tag


@render_to('homepage.html')
def homepage(request):

    if request.blog_user:
        return blog_list(request)

    coders = []

    users_with_gravatars = User.objects.filter(
        userprofile__in=UserProfile.objects.filter(has_gravatar=True)
    ).order_by('?')

    for user in users_with_gravatars:
        public_snipts_count = Snipt.objects.filter(
            user=user, public=True).values('pk').count()

        if public_snipts_count:
            user.email_md5 = hashlib.md5(user.email.lower().encode('utf-8')) \
                .hexdigest()
            coders.append(user)

        if len(coders) == 35:
            break

    return {
        'coders': coders,
        'snipts_count': Snipt.objects.all().count(),
        'users_count': User.objects.all().count(),
    }


@ajax_request
def lexers(request):
    lexers = get_lexers_list()
    objects = []

    for l in lexers:

        try:
            filters = l[2]
        except IndexError:
            filters = []

        try:
            mimetypes = l[3]
        except IndexError:
            mimetypes = []

        objects.append({
            'name': l[0],
            'lexers': l[1],
            'filters': filters,
            'mimetypes': mimetypes
        })

    return {'objects': objects}


def login_redirect(request):
    if request.user.is_authenticated():
        return HttpResponseRedirect('/' + request.user.username + '/')
    else:
        return HttpResponseRedirect('/')


@render_to('pro.html')
def pro(request):
    return {}


@login_required
@render_to('pro-complete.html')
def pro_complete(request):

    if request.method == 'POST':

        token = request.POST['token']
        stripe.api_key = os.environ.get('STRIPE_SECRET_KEY',
                                        settings.STRIPE_SECRET_KEY)

        if 'plan' in request.GET:
            plan = request.GET['plan']
        else:
            plan = request.POST['plan']

        try:
            customer = stripe.Customer.create(card=token,
                                              plan=plan,
                                              email=request.user.email)
        except stripe.CardError as e:
            error_message = e.json_body['error']['message']
            return HttpResponseRedirect('/pro/?declined=%s' % error_message or
                                        'Your card was declined.')

        profile = request.user.profile
        profile.is_pro = True
        profile.pro_date = datetime.datetime.now()
        profile.stripe_id = customer.id
        profile.save()

        send_mail('[Snipt] New Pro signup: {}'.format(request.user.username),
                  """
                  User: https://snipt.net/{}
                  Email: {}
                  Plan: {}
                  """.format(request.user.username, request.user.email, plan),
                  'support@snipt.net',
                  ['nick@snipt.net'],
                  fail_silently=False)

        return {}

    else:
        return HttpResponseBadRequest()


def sitemap(request):

    tags = Tag.objects.filter(snipt__public=True)
    tags = tags.annotate(count=Count('taggit_taggeditem_items__id'))
    tags = tags.order_by('-count')[:1000]

    return render_to_response('sitemap.xml',
                              {'tags': tags},
                              context_instance=RequestContext(request),
                              content_type='application/xml')


@render_to('tags.html')
def tags(request):

    all_tags = Tag.objects.filter(snipt__public=True).order_by('name')
    all_tags = all_tags.annotate(count=Count('taggit_taggeditem_items__id'))

    popular_tags = Tag.objects.filter(snipt__public=True)
    popular_tags = popular_tags.annotate(
        count=Count('taggit_taggeditem_items__id'))
    popular_tags = popular_tags.order_by('-count')[:20]
    popular_tags = sorted(popular_tags, key=lambda tag: tag.name)

    return {
        'all_tags': all_tags,
        'tags': popular_tags
    }


@ajax_request
def user_api_key(request):

    if not request.user.is_authenticated():
        return HttpResponseBadRequest()

    return {
        'api_key': request.user.api_key.key
    }