<?php

namespace App\Filament\Resources;

use App\Filament\Resources\BackupSetResource\Pages;
use App\Filament\Resources\BackupSetResource\RelationManagers\BackupItemsRelationManager;
use App\Models\BackupSet;
use App\Models\Tenant;
use App\Services\Intune\AuditLogger;
use App\Services\Intune\BackupService;
use BackedEnum;
use Filament\Actions;
use Filament\Actions\ActionGroup;
use Filament\Forms;
use Filament\Infolists;
use Filament\Notifications\Notification;
use Filament\Resources\Resource;
use Filament\Schemas\Schema;
use Filament\Tables;
use Filament\Tables\Table;
use UnitEnum;

class BackupSetResource extends Resource
{
    protected static ?string $model = BackupSet::class;

    protected static string|BackedEnum|null $navigationIcon = 'heroicon-o-archive-box';

    protected static string|UnitEnum|null $navigationGroup = 'Backups & Restore';

    public static function form(Schema $schema): Schema
    {
        return $schema
            ->schema([
                Forms\Components\TextInput::make('name')
                    ->label('Backup name')
                    ->default(fn () => now()->format('Y-m-d H:i:s').' backup')
                    ->required(),
            ]);
    }

    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('name')->searchable(),
                Tables\Columns\TextColumn::make('status')->badge(),
                Tables\Columns\TextColumn::make('item_count')->label('Items'),
                Tables\Columns\TextColumn::make('created_by')->label('Created by'),
                Tables\Columns\TextColumn::make('completed_at')->dateTime()->since(),
                Tables\Columns\TextColumn::make('created_at')->dateTime()->since(),
            ])
            ->filters([
                Tables\Filters\TrashedFilter::make(),
            ])
            ->actions([
                Actions\ViewAction::make()
                    ->url(fn (BackupSet $record) => static::getUrl('view', ['record' => $record]))
                    ->openUrlInNewTab(false),
                ActionGroup::make([
                    Actions\Action::make('archive')
                        ->label('Archive')
                        ->color('danger')
                        ->icon('heroicon-o-archive-box-x-mark')
                        ->requiresConfirmation()
                        ->visible(fn (BackupSet $record) => ! $record->trashed())
                        ->action(function (BackupSet $record, AuditLogger $auditLogger) {
                            if ($record->restoreRuns()->withTrashed()->exists()) {
                                Notification::make()
                                    ->title('Cannot archive backup set')
                                    ->body('Backup sets used by restore runs cannot be archived.')
                                    ->danger()
                                    ->send();

                                return;
                            }

                            $record->delete();

                            if ($record->tenant) {
                                $auditLogger->log(
                                    tenant: $record->tenant,
                                    action: 'backup.deleted',
                                    resourceType: 'backup_set',
                                    resourceId: (string) $record->id,
                                    status: 'success',
                                    context: ['metadata' => ['name' => $record->name]]
                                );
                            }

                            Notification::make()
                                ->title('Backup set archived')
                                ->success()
                                ->send();
                        }),
                    Actions\Action::make('forceDelete')
                        ->label('Force delete')
                        ->color('danger')
                        ->icon('heroicon-o-trash')
                        ->requiresConfirmation()
                        ->visible(fn (BackupSet $record) => $record->trashed())
                        ->action(function (BackupSet $record, AuditLogger $auditLogger) {
                            if ($record->restoreRuns()->withTrashed()->exists()) {
                                Notification::make()
                                    ->title('Cannot force delete backup set')
                                    ->body('Backup sets referenced by restore runs cannot be removed.')
                                    ->danger()
                                    ->send();

                                return;
                            }

                            if ($record->tenant) {
                                $auditLogger->log(
                                    tenant: $record->tenant,
                                    action: 'backup.force_deleted',
                                    resourceType: 'backup_set',
                                    resourceId: (string) $record->id,
                                    status: 'success',
                                    context: ['metadata' => ['name' => $record->name]]
                                );
                            }

                            $record->items()->withTrashed()->forceDelete();
                            $record->forceDelete();

                            Notification::make()
                                ->title('Backup set permanently deleted')
                                ->success()
                                ->send();
                        }),
                ])->icon('heroicon-o-ellipsis-vertical'),
            ])
            ->bulkActions([]);
    }

    public static function infolist(Schema $schema): Schema
    {
        return $schema
            ->schema([
                Infolists\Components\TextEntry::make('name'),
                Infolists\Components\TextEntry::make('status')->badge(),
                Infolists\Components\TextEntry::make('item_count')->label('Items'),
                Infolists\Components\TextEntry::make('created_by')->label('Created by'),
                Infolists\Components\TextEntry::make('completed_at')->dateTime(),
                Infolists\Components\TextEntry::make('metadata')
                    ->label('Metadata')
                    ->formatStateUsing(fn ($state) => json_encode($state ?? [], JSON_PRETTY_PRINT))
                    ->copyable()
                    ->copyMessage('Metadata copied'),
            ]);
    }

    public static function getRelations(): array
    {
        return [
            BackupItemsRelationManager::class,
        ];
    }

    public static function getPages(): array
    {
        return [
            'index' => Pages\ListBackupSets::route('/'),
            'create' => Pages\CreateBackupSet::route('/create'),
            'view' => Pages\ViewBackupSet::route('/{record}'),
        ];
    }

    /**
     * @return array{label:?string,category:?string,restore:?string,risk:?string}|array<string,mixed>
     */
    private static function typeMeta(?string $type): array
    {
        if ($type === null) {
            return [];
        }

        return collect(config('tenantpilot.supported_policy_types', []))
            ->firstWhere('type', $type) ?? [];
    }

    /**
     * Create a backup set via the domain service instead of direct model mass-assignment.
     */
    public static function createBackupSet(array $data): BackupSet
    {
        /** @var Tenant $tenant */
        $tenant = Tenant::current();

        /** @var BackupService $service */
        $service = app(BackupService::class);

        return $service->createBackupSet(
            tenant: $tenant,
            policyIds: $data['policy_ids'] ?? [],
            name: $data['name'] ?? null,
            actorEmail: auth()->user()?->email,
            actorName: auth()->user()?->name,
        );
    }
}