from django.contrib import admin
from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
from django.contrib.auth.forms import AdminUserCreationForm, UserChangeForm
from django.utils.translation import gettext_lazy as _

from .models import Key, Point, Server, User


class UserCreationForm(AdminUserCreationForm):
	class Meta(AdminUserCreationForm.Meta):
		model = User


class UserEditForm(UserChangeForm):
	class Meta(UserChangeForm.Meta):
		model = User


@admin.register(User)
class UserAdmin(BaseUserAdmin):
	form = UserEditForm
	add_form = UserCreationForm
	fieldsets = (
		(None, {'fields': ('username', 'password')}),
		(_('Personal info'), {'fields': ('first_name', 'last_name')}),
		(_('Permissions'), {'fields': ('is_active', 'is_staff', 'is_superuser', 'groups', 'user_permissions')}),
		(_('Important dates'), {'fields': ('last_login', 'date_joined')}),
	)
	list_display = ('username', 'first_name', 'last_name', 'is_staff')
	search_fields = ('username', 'first_name', 'last_name')


class ServerInline(admin.StackedInline):
	model = Server
	extra = 0
	fields = (
		'role', 'address', 'ssh_port', 'root_password', 'default_root_password', 'public_key', 'known_hosts', 'uname',
	)
	readonly_fields = fields
	can_delete = False

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


@admin.register(Point)
class PointAdmin(admin.ModelAdmin):
	list_display = ('name', 'owner', 'status', 'domain', 'created_at')
	list_filter = ('status',)
	search_fields = ('name', 'servers__address')
	readonly_fields = (
		'owner', 'name', 'status', 'error', 'health_error', 'checked_at', 'task_started_at', 'task_heartbeat',
		'created_at',
	)
	inlines = [ServerInline]


@admin.register(Server)
class ServerAdmin(admin.ModelAdmin):
	list_display = ('address', 'role', 'point', 'ssh_port', 'has_fingerprint')
	list_filter = ('role',)
	search_fields = ('address', 'point__name')
	exclude = ('private_key',)
	readonly_fields = ('point', 'role', 'public_key', 'uname')
	actions = ('reset_fingerprint',)

	@admin.display(boolean=True, description='отпечаток')
	def has_fingerprint(self, server):
		return bool(server.known_hosts)

	@admin.action(description='Сбросить отпечаток ssh (после переустановки ОС)')
	def reset_fingerprint(self, request, queryset):
		for server in queryset:
			server.reset_fingerprint()
		self.message_user(request, f'Сброшено отпечатков: {len(queryset)}')


@admin.register(Key)
class KeyAdmin(admin.ModelAdmin):
	"""Только просмотр: ключи выпускаются и отзываются через панель точки (services), иначе база и панель разойдутся.

	uuid и ссылка подписки не показываются: это доступ в сеть клиента.
	"""

	list_display = ('name', 'point', 'created_at')
	list_filter = ('point',)
	search_fields = ('name', 'point__name')
	fields = ('name', 'point', 'created_at')
	readonly_fields = fields

	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