from django.shortcuts import render,render_to_response,render,get_object_or_404
from django.core.paginator import Paginator
from .models import Blog,BlogType
from django.conf import settings
from django.db.models import Count
from django.contrib.contenttypes.models import ContentType
from read_statistics.utils import read_statistics_once_read
from comment.models import Comment
from comment.forms import CommentForm

def get_blog_list_common_data(request,blog_all_list):
    paginator = Paginator(blog_all_list,settings.EACH_PAGE_BLOGS_NUMBER)
    page_num = request.GET.get('page', 1)  # 获取页码参数
    page_of_blogs = paginator.get_page(page_num)

    # 获取当前页码前后两页的页码范围
    current_page_num = page_of_blogs.number
    page_range = list(range(max(current_page_num-2,1),min(current_page_num+3,paginator.num_pages+1)))

    #加上省略页码判断
    if page_range[0] -1>=2:
        page_range.insert(0,'...')
    if paginator.num_pages-page_range[-1]>=2:
        page_range.append('...')

    #加上首页和尾页
    if page_range[0]!=1:
        page_range.insert(0,1)
    if page_range[-1]!=paginator.num_pages:
        page_range.append(paginator.num_pages)

    blog_dates = Blog.objects.dates('create_time','month',order='DESC')
    blog_dates_dict = {}
    for blog_date in blog_dates:
        blog_count = Blog.objects.filter(create_time__year=blog_date.year,create_time__month=blog_date.month).count()
        blog_dates_dict[blog_date] = blog_count

    context = {}
    context['blogs'] = page_of_blogs.object_list
    context['page_of_blogs'] = page_of_blogs
    context['page_range'] = page_range
    context['blog_types']=BlogType.objects.annotate(blog_count=Count('blog'))
    context['blog_dates']=blog_dates_dict
    return context

def blog_list(request):
    blog_all_list = Blog.objects.all()
    context = get_blog_list_common_data(request,blog_all_list)
    return render(request,'blog/blog_list.html',context)

def blogs_with_type(request,blog_type_pk):
    blog_type = get_object_or_404(BlogType,pk=blog_type_pk)
    blog_all_list = Blog.objects.filter(blog_type=blog_type)
    context = get_blog_list_common_data(request,blog_all_list)
    context['blog_type'] = blog_type
    return render(request,'blog/blogs_with_type.html', context)


def blogs_with_date(request,year,month):
    blog_all_list = Blog.objects.filter(create_time__year=year,create_time__month=month)
    context = get_blog_list_common_data(request, blog_all_list)
    context['blogs_with_date'] = '%s年%s月' %(year,month)
    return render(request,'blog/blogs_with_date.html', context)

def blog_detail(request,blog_pk):
    blog = get_object_or_404(Blog, pk=blog_pk)
    read_cookie_key = read_statistics_once_read(request,blog)
    blog_content_type = ContentType.objects.get_for_model(blog)
    comments = Comment.objects.filter(content_type=blog_content_type,object_id=blog.pk)

    context = {}
    context['blog'] = blog
    context['previous_blog'] = Blog.objects.filter(create_time__gt=blog.create_time).last()
    context['next_blog'] = Blog.objects.filter(create_time__lt=blog.create_time).first()
    context['comments']=comments
    context['comments_form'] = CommentForm(initial={'content_type':blog_content_type.model,'object_id':blog_pk})
    response = render(request,'blog/blog_detail.html', context)
    response.set_cookie(read_cookie_key,'true')#阅读cookie标记
    return response

# Create your views here.
