from django.shortcuts import reverse, redirect, render, get_object_or_404
from django.http import HttpResponseBadRequest, HttpResponse
from django.contrib.auth.decorators import login_required
from django.contrib import auth
from django.contrib.auth import authenticate
from django.core.paginator import Paginator
from django.utils.translation import gettext_lazy as _
from django.core.exceptions import ObjectDoesNotExist
from django.db.models import Count
from .models import User, Report, Preference
from .forms import ReportForm
from mastodon.api import *
from mastodon import mastodon_request_included
from common.config import *
from common.models import MarkStatusEnum
from common.utils import PageLinksGenerator
from management.models import Announcement
from books.models import *
from movies.models import *
from music.models import *
from games.models import *
from books.forms import BookMarkStatusTranslator
from movies.forms import MovieMarkStatusTranslator
from music.forms import MusicMarkStatusTranslator
from games.forms import GameMarkStatusTranslator
from mastodon.models import MastodonApplication
from mastodon.api import verify_account
from django.conf import settings
from urllib.parse import quote
import django_rq
from .account import *
from .tasks import *
from datetime import timedelta
from django.utils import timezone
import json
from django.contrib import messages
from books.models import BookMark, BookReview
from movies.models import MovieMark, MovieReview
from games.models import GameMark, GameReview
from music.models import AlbumMark, SongMark, AlbumReview, SongReview
from collection.models import Collection  #, CollectionMark
from common.importers.goodreads import GoodreadsImporter
from common.importers.douban import DoubanImporter


# the 'login' page that user can see
def login(request):
    if request.method == 'GET':
        selected_site = request.GET.get('site', default='')

        sites = MastodonApplication.objects.all().order_by("domain_name")

        # store redirect url in the cookie
        if request.GET.get('next'):
            request.session['next_url'] = request.GET.get('next')

        return render(
            request,
            'users/login.html',
            {
                'sites': sites,
                'scope': quote(settings.MASTODON_CLIENT_SCOPE),
                'selected_site': selected_site,
                'allow_any_site': settings.MASTODON_ALLOW_ANY_SITE,
            }
        )
    else:
        return HttpResponseBadRequest()


# connect will redirect to mastodon server
def connect(request):
    if not settings.MASTODON_ALLOW_ANY_SITE:
        return redirect(reverse("users:login"))
    login_domain = request.session['swap_domain'] if request.session.get('swap_login') else request.GET.get('domain')
    if not login_domain:
        return render(request, 'common/error.html', {'msg': '未指定实例域名', 'secondary_msg': "", })
    login_domain = login_domain.strip().lower().split('//')[-1].split('/')[0].split('@')[-1]
    domain, version = get_instance_info(login_domain)
    app, error_msg = get_mastodon_application(domain)
    if app is None:
        return render(request, 'common/error.html', {'msg': error_msg, 'secondary_msg': "", })
    else:
        login_url = get_mastodon_login_url(app, login_domain, version, request)
        resp = redirect(login_url)
        resp.set_cookie('mastodon_domain', domain)
        return resp


# mastodon server redirect back to here
@mastodon_request_included
def OAuth2_login(request):
    if request.method != 'GET':
        return HttpResponseBadRequest()

    code = request.GET.get('code')
    site = request.COOKIES.get('mastodon_domain')
    try:
        token, refresh_token = obtain_token(site, request, code)
    except ObjectDoesNotExist:
        return HttpResponseBadRequest("Mastodon site not registered")
    if not token:
        return render(
            request,
            'common/error.html',
            {
                'msg': _("认证失败😫")
            }
        )

    if request.session.get('swap_login', False) and request.user.is_authenticated:  # swap login for existing user
        return swap_login(request, token, site, refresh_token)

    user = authenticate(request, token=token, site=site)
    if user:  # existing user
        user.mastodon_token = token
        user.mastodon_refresh_token = refresh_token
        user.save(update_fields=['mastodon_token', 'mastodon_refresh_token'])
        auth_login(request, user)
        if request.session.get('next_url') is not None:
            response = redirect(request.session.get('next_url'))
            del request.session['next_url']
        else:
            response = redirect(reverse('common:home'))
        return response
    else:  # newly registered user
        code, user_data = verify_account(site, token)
        if code != 200 or user_data is None:
            return render(
                request,
                'common/error.html',
                {
                    'msg': _("联邦网络访问失败😫")
                }
            )
        new_user = User(
            username=user_data['username'],
            mastodon_id=user_data['id'],
            mastodon_site=site,
            mastodon_token=token,
            mastodon_refresh_token=refresh_token,
            mastodon_account=user_data,
        )
        new_user.save()
        request.session['new_user'] = True
        auth_login(request, new_user)
        return redirect(reverse('users:register'))


@mastodon_request_included
@login_required
def logout(request):
    if request.method == 'GET':
        # revoke_token(request.user.mastodon_site, request.user.mastodon_token)
        auth_logout(request)
        return redirect(reverse("users:login"))
    else:
        return HttpResponseBadRequest()


@mastodon_request_included
@login_required
def reconnect(request):
    if request.method == 'POST':
        request.session['swap_login'] = True
        request.session['swap_domain'] = request.POST['domain']
        return connect(request)
    else:
        return HttpResponseBadRequest()


@mastodon_request_included
def register(request):
    if request.session.get('new_user'):
        del request.session['new_user']
        return render(request, 'users/register.html')
    else:
        return redirect(reverse('common:home'))


def swap_login(request, token, site, refresh_token):
    del request.session['swap_login']
    del request.session['swap_domain']
    code, data = verify_account(site, token)
    current_user = request.user
    if code == 200 and data is not None:
        username = data['username']
        if username == current_user.username and site == current_user.mastodon_site:
            messages.add_message(request, messages.ERROR, _(f'该身份 {username}@{site} 与当前账号相同。'))
        else:
            try:
                existing_user = User.objects.get(username=username, mastodon_site=site)
                messages.add_message(request, messages.ERROR, _(f'该身份 {username}@{site} 已被用于其它账号。'))
            except ObjectDoesNotExist:
                current_user.username = username
                current_user.mastodon_id = data['id']
                current_user.mastodon_site = site
                current_user.mastodon_token = token
                current_user.mastodon_refresh_token = refresh_token
                current_user.mastodon_account = data
                current_user.save(update_fields=['username', 'mastodon_id', 'mastodon_site', 'mastodon_token', 'mastodon_refresh_token', 'mastodon_account'])
                django_rq.get_queue('mastodon').enqueue(refresh_mastodon_data_task, current_user, token)
                messages.add_message(request, messages.INFO, _(f'账号身份已更新为 {username}@{site}。'))
    else:
        messages.add_message(request, messages.ERROR, _('连接联邦网络获取身份信息失败。'))
    return redirect(reverse('users:data'))


def auth_login(request, user):
    """ Decorates django ``login()``. Attach token to session."""
    auth.login(request, user)
    if user.mastodon_last_refresh < timezone.now() - timedelta(hours=1) or user.mastodon_account == {}:
        django_rq.get_queue('mastodon').enqueue(refresh_mastodon_data_task, user)


def auth_logout(request):
    """ Decorates django ``logout()``. Release token in session."""
    auth.logout(request)


@login_required
def clear_data(request):
    if request.method == 'POST':
        if request.POST.get('verification') == request.user.mastodon_username:
            BookMark.objects.filter(owner=request.user).delete()
            MovieMark.objects.filter(owner=request.user).delete()
            GameMark.objects.filter(owner=request.user).delete()
            AlbumMark.objects.filter(owner=request.user).delete()
            SongMark.objects.filter(owner=request.user).delete()
            BookReview.objects.filter(owner=request.user).delete()
            MovieReview.objects.filter(owner=request.user).delete()
            GameReview.objects.filter(owner=request.user).delete()
            AlbumReview.objects.filter(owner=request.user).delete()
            SongReview.objects.filter(owner=request.user).delete()
            # CollectionMark.objects.filter(owner=request.user).delete()
            Collection.objects.filter(owner=request.user).delete()
            request.user.first_name = request.user.username
            request.user.last_name = request.user.mastodon_site
            request.user.is_active = False
            request.user.username = 'removed_' + str(request.user.id)
            request.user.mastodon_id = 0
            request.user.mastodon_site = 'removed'
            request.user.mastodon_token = ''
            request.user.mastodon_locked = False
            request.user.mastodon_followers = []
            request.user.mastodon_following = []
            request.user.mastodon_mutes = []
            request.user.mastodon_blocks = []
            request.user.mastodon_domain_blocks = []
            request.user.mastodon_account = {}
            request.user.save()
            auth_logout(request)
            return redirect(reverse("users:login"))
        else:
            messages.add_message(request, messages.ERROR, _('验证信息不符。'))
    return redirect(reverse("users:data"))