import os
from json import JSONEncoder

import requests
from django.contrib import messages
from django.contrib.auth import authenticate, login
from django.contrib.auth.decorators import login_required
from django.contrib.auth.mixins import LoginRequiredMixin
from django.http import HttpRequest, HttpResponseRedirect
from django.shortcuts import render
from django.urls import reverse
from django.views import View

from cms.forms import ArticleForm, UserForm
from cms.models import Article


class ArticleView(LoginRequiredMixin, View):
    def _promote_to_telegram(self, article: Article):
        bot_token = os.getenv('TELEGRAM_BOT_TOKEN')
        channel_id = os.getenv('TELEGRAM_CHAT_ID')

        long_text = f'{article.body}\n{article.link}'

        send_message_url = f'https://api.telegram.org/bot{bot_token}/sendMessage?chat_id={channel_id}&text={long_text}'

        response = requests.get(send_message_url)
        result = response.json()
        if result['ok']:
            print('Мы послали сообщение, ура!')
        else:
            print('Похоже, нас послали доделывать приложение :-(')

    def _promote_to_vk(self, article: Article):
        import vk_api
        vk_login = os.getenv('VK_LOGIN')
        vk_password = os.getenv('VK_PASSWORD')
        vk_owner_id = os.getenv('VK_OWNER_ID')

        session = vk_api.VkApi(login=vk_login,
                               password=vk_password)
        session.auth()
        api = session.get_api()

        api.wall.post(owner_id=vk_owner_id,
                      message=article.body,
                      attachments=article.link)

    def _promote_to_ok(self, article: Article):
        import ok_api

        ok_access_token = os.getenv('OK_ACCESS_TOKEN')
        ok_application_key = os.getenv('OK_APPLICATION_KEY')
        ok_application_secret_key = os.getenv('OK_APPLICATION_SECRET_KEY')

        session = ok_api.OkApi(access_token=ok_access_token,
                               application_key=ok_application_key,
                               application_secret_key=ok_application_secret_key)
        attachments = {
            'media': [
                {
                    'type': 'text',
                    'text': article.body,
                },
                {
                    'type': 'link',
                    'url': article.link,
                },
            ]
        }
        encoded_attachments = JSONEncoder().encode(attachments)
        session.mediatopic.post(type='GROUP_THEME',
                                gid='70000001426867',
                                attachment=encoded_attachments)

    def post(self, request: HttpRequest):
        post_data = request.POST
        article = Article.objects.create(body=post_data['body'],
                                         link=post_data['link'])
        self._promote_to_telegram(article)
        self._promote_to_ok(article)
        self._promote_to_vk(article)
        return render(request, template_name='articles/created.html')


@login_required
def new_article(request):
    article_form = ArticleForm()
    article_context = {
        'new_article_form': article_form
    }
    return render(request,
                  template_name='articles/new.html',
                  context=article_context)


class AuthenticationView(View):
    def get(self, request, *args, **kwargs):
        user_form = UserForm()
        auth_context = {
            'user_form': user_form,
        }
        return render(request,
                      'user/sign_in.html',
                      context=auth_context)

    def post(self, request, *args, **kwargs):
        username = request.POST['username']
        password = request.POST['password']
        authenticated_user = authenticate(username=username,
                                          password=password)
        if authenticated_user is None:
            messages.add_message(request,
                                 messages.ERROR,
                                 'Неправильное имя пользователя и/или пароль')
            return HttpResponseRedirect(reverse('authenticate'))
        else:
            messages.add_message(request,
                                 messages.SUCCESS,
                                 'Поздравляю, вы вошли успешно')
            login(request,
                  user=authenticated_user)
            return HttpResponseRedirect(reverse('new-article'))