from django.shortcuts import render, redirect
from account.models import MyUser
from album.models import AlbumInfo
from django.core.paginator import Paginator
from django.core.paginator import PageNotAnInteger
from django.core.paginator import EmptyPage
from .models import ArticleInfo, ArticleTag, Comment
from django.db.models import F
from django.urls import reverse


def article(request, id, page):
    album = AlbumInfo.objects.filter(user_id=id)
    tag = ArticleTag.objects.filter(user_id=id)
    user = MyUser.objects.filter(id=id).first()
    if not user:
        return redirect(reverse('register'))
    ats = ArticleInfo.objects.filter(author_id=id).order_by('-created')
    paginator = Paginator(ats, 10)
    try:
        pageInfo = paginator.page(page)
    except PageNotAnInteger:
        # 如果参数page 的数据类型不是整型，就返回第一页数据
        pageInfo = paginator.page(1)
    except EmptyPage:
        # 若用户访问的页数大于实际页数，则返回最后一页的数据
        pageInfo = paginator.page(paginator.num_pages)
    return render(request, 'article.html', locals())


def detail(request, id, aId):
    album = AlbumInfo.objects.filter(user_id=id)
    tag = ArticleTag.objects.filter(user_id=id)
    user = MyUser.objects.filter(id=id).first()
    if request.method == 'GET':
        ats = ArticleInfo.objects.filter(id=aId).first()
        atags = ArticleInfo.objects.get(id=aId).article_tag.all()
        cms = Comment.objects.filter(article_id=aId).order_by('-created')
        # 添加阅读量
        if not request.session.get('reading' + str(id) + str(aId), ''):
            reading = ArticleInfo.objects.filter(id=aId)
            reading.update(reading=F('reading') + 1)
            request.session['reading' + str(id) + str(aId)] = True
        return render(request, 'detail.html', locals())
    else:
        commentator = request.POST.get('name')
        email = request.POST.get('email')
        content = request.POST.get('content')
        value = {'commentator': commentator,
                 'content': content, 'article_id': aId}
        Comment.objects.create(**value)
        kwargs = {'id': id, 'aId': aId}
        return redirect(reverse('detail', kwargs=kwargs))