from django.contrib import admin
from django.contrib.admin.models import LogEntry, DELETION
from django.utils.html import escape
from django.utils.safestring import mark_safe
from django.urls import reverse
from .models import api


@admin.register(LogEntry)
class LogEntryAdmin(admin.ModelAdmin):
    # to have a date-based drilldown navigation in the admin page
    date_hierarchy = 'action_time'

    # to filter the resultes by users, content types and action flags
    list_filter = ['user', 'content_type', 'action_flag']

    # when searching the user will be able to search in both object_repr and change_message
    search_fields = ["object_repr", "change_message"]

    list_display = [
        "action_time",
        "user",
        "content_type",
        "action_flag",
        "object_link",
    ]

    def has_add_permission(self, request):
        return False

    def has_change_permission(self, request, obj=None):
        return False

    def has_delete_permission(self, request, obj=None):
        return False

    def has_view_permission(self, request, obj=None):
        return request.user.is_staff

    def object_link(self, obj):
        if obj.action_flag == DELETION:
            link = escape(obj.object_repr)
        else:
            ct = obj.content_type
            link = '<a href="%s">%s</a>' % (
                reverse(
                    "admin:%s_%s_change" % (ct.app_label, ct.model),
                    args=[obj.object_id],
                ),
                escape(obj.object_repr),
            )
        return mark_safe(link)

    object_link.admin_order_field = "object_repr"
    object_link.short_description = "object"