from django.shortcuts import  get_object_or_404,render
from django.core.paginator import Paginator
from .models import Blog, BlogType
from  django.conf import  settings
from django.db.models import Count
from read_statistics.utils import read_statistics_once_read


def get_blog_list_common_data(request,blogs_all_list):
    paginator = Paginator(blogs_all_list, settings.PER_PAGES)  # 每10进行分页
    page_num = request.GET.get('page', 1)  # 获取url的页码参数（GET请求）
    page_of_blogs = paginator.get_page(page_num)
    current_page_num = page_of_blogs.number
    # page_range=[current_page_num-2,current_page_num-1,current_page_num,current_page_num+1,current_page_num+2]
    page_range = list(range(max(1, current_page_num - 2), min(current_page_num + 3, paginator.num_pages + 1)))
    if page_range[0] - 1 >= 2:
        page_range.insert(0, '...')
    if paginator.num_pages - page_range[-1] >= 2:
        page_range.append('...')
    if page_range[0] != 1:
        page_range.insert(0, 1)
    if page_range[-1] != paginator.num_pages:
        page_range.append(paginator.num_pages)
    #获取博客分类的对应博客数量
    blog_dates=Blog.objects.dates('created_time', 'month', order="DESC")
    blog_dates_dict={}
    for blog_date in blog_dates:
        blog_count=Blog.objects.filter(created_time__year=blog_date.year,
                                       created_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):
    blogs_all_list = Blog.objects.all()
    context=get_blog_list_common_data(request,blogs_all_list)
    return render(request,'blog_list.html', context)

def blog_detail(request, blog_pk):
    context = {}
    blog= get_object_or_404(Blog, pk=blog_pk)
    read_cookie_key=read_statistics_once_read(request,blog)
    context['next_blog']=Blog.objects.filter(created_time__lt=blog.created_time).first()
    context['previous_blog']=Blog.objects.filter(created_time__gt=blog.created_time).last()
    context['blog']=blog

    response=render(request,'blog_detail.html', context)
    response.set_cookie(read_cookie_key,'true')    #阅读cookie标记
    return response
def blogs_with_type(request, blog_type_pk):

    blog_type = get_object_or_404(BlogType, pk=blog_type_pk)
    #context['blogs'] = Blog.objects.filter(blog_type=blog_type)
    #context['blog_types'] = BlogType.objects.all()

    blogs_all_list = Blog.objects.filter(blog_type=blog_type)

    context = get_blog_list_common_data(request,blogs_all_list)
    context['blog_type'] = blog_type


    return render(request,'blogs_with_type.html', context)

def blogs_with_date(request,year,month):

    blogs_all_list = Blog.objects.filter(created_time__year=year,created_time__month=month)

    context = get_blog_list_common_data(request,blogs_all_list)

    context['blog_with_date']='%s年%s月'%(year,month)
    return render(request,'blog_with_date.html', context)

