# 模块说明：评论模型的后台管理配置，提供启用/禁用评论的批量操作，
# 并在列表中展示到用户与文章的跳转链接。
from django.contrib import admin
from django.urls import reverse
from django.utils.html import format_html
from django.utils.translation import gettext_lazy as _


def disable_commentstatus(modeladmin, request, queryset):
    # 批量关闭选中评论的显示状态
    queryset.update(is_enable=False)


def enable_commentstatus(modeladmin, request, queryset):
    # 批量开启选中评论的显示状态
    queryset.update(is_enable=True)


disable_commentstatus.short_description = _('Disable comments')
enable_commentstatus.short_description = _('Enable comments')


class CommentAdmin(admin.ModelAdmin):
    list_per_page = 20
    list_display = (
        'id',
        'body',
        'link_to_userinfo',
        'link_to_article',
        'is_enable',
        'creation_time')
    list_display_links = ('id', 'body', 'is_enable')
    list_filter = ('is_enable',)
    exclude = ('creation_time', 'last_modify_time')
    actions = [disable_commentstatus, enable_commentstatus]

    def link_to_userinfo(self, obj):
        # 在后台列表中展示评论作者的链接，跳转到对应用户修改页
        info = (obj.author._meta.app_label, obj.author._meta.model_name)
        link = reverse('admin:%s_%s_change' % info, args=(obj.author.id,))
        return format_html(
            u'<a href="%s">%s</a>' %
            (link, obj.author.nickname if obj.author.nickname else obj.author.email))

    def link_to_article(self, obj):
        # 在后台列表中展示评论所属文章的链接，跳转到对应文章修改页
        info = (obj.article._meta.app_label, obj.article._meta.model_name)
        link = reverse('admin:%s_%s_change' % info, args=(obj.article.id,))
        return format_html(
            u'<a href="%s">%s</a>' % (link, obj.article.title))

    link_to_userinfo.short_description = _('User')
    link_to_article.short_description = _('Article')