<?php

namespace App\Filament\Resources\BackupSetResource\RelationManagers;

use App\Filament\Resources\PolicyResource;
use App\Models\BackupItem;
use App\Models\Policy;
use App\Models\Tenant;
use App\Services\Intune\AuditLogger;
use App\Services\Intune\BackupService;
use Filament\Actions;
use Filament\Forms;
use Filament\Notifications\Notification;
use Filament\Resources\RelationManagers\RelationManager;
use Filament\Tables;
use Filament\Tables\Table;
use Illuminate\Database\Eloquent\Builder;

class BackupItemsRelationManager extends RelationManager
{
    protected static string $relationship = 'items';

    public function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('policy.display_name')
                    ->label('Policy')
                    ->sortable()
                    ->searchable(),
                Tables\Columns\TextColumn::make('policy_type')
                    ->label('Type')
                    ->badge()
                    ->formatStateUsing(fn (?string $state) => static::typeMeta($state)['label'] ?? $state),
                Tables\Columns\TextColumn::make('restore_mode')
                    ->label('Restore')
                    ->badge()
                    ->state(fn (BackupItem $record) => static::typeMeta($record->policy_type)['restore'] ?? 'enabled')
                    ->color(fn (?string $state) => $state === 'preview-only' ? 'warning' : 'success'),
                Tables\Columns\TextColumn::make('risk')
                    ->label('Risk')
                    ->badge()
                    ->state(fn (BackupItem $record) => static::typeMeta($record->policy_type)['risk'] ?? 'n/a')
                    ->color(fn (?string $state) => str_contains((string) $state, 'high') ? 'danger' : 'gray'),
                Tables\Columns\TextColumn::make('policy_identifier')
                    ->label('Policy ID')
                    ->copyable(),
                Tables\Columns\TextColumn::make('platform')->badge(),
                Tables\Columns\TextColumn::make('captured_at')->dateTime(),
                Tables\Columns\TextColumn::make('created_at')->since(),
            ])
            ->filters([])
            ->headerActions([
                Actions\Action::make('addPolicies')
                    ->label('Policies hinzufügen')
                    ->icon('heroicon-o-plus')
                    ->form([
                        Forms\Components\Select::make('policy_ids')
                            ->label('Policies')
                            ->multiple()
                            ->required()
                            ->searchable()
                            ->options(function (RelationManager $livewire) {
                                $backupSet = $livewire->getOwnerRecord();
                                $tenantId = $backupSet?->tenant_id ?? Tenant::current()->getKey();

                                $existing = $backupSet
                                    ? $backupSet->items()->pluck('policy_id')->filter()->all()
                                    : [];

                                return Policy::query()
                                    ->where('tenant_id', $tenantId)
                                    ->when($existing, fn (Builder $query) => $query->whereNotIn('id', $existing))
                                    ->orderBy('display_name')
                                    ->pluck('display_name', 'id');
                            }),
                    ])
                    ->action(function (array $data, BackupService $service) {
                        if (empty($data['policy_ids'])) {
                            Notification::make()
                                ->title('No policies selected')
                                ->warning()
                                ->send();

                            return;
                        }

                        $backupSet = $this->getOwnerRecord();
                        $tenant = $backupSet?->tenant ?? Tenant::current();

                        $service->addPoliciesToSet(
                            tenant: $tenant,
                            backupSet: $backupSet,
                            policyIds: $data['policy_ids'],
                            actorEmail: auth()->user()?->email,
                            actorName: auth()->user()?->name,
                        );

                        Notification::make()
                            ->title('Policies added to backup')
                            ->success()
                            ->send();
                    }),
            ])
            ->actions([
                Actions\ViewAction::make()
                    ->label('View policy')
                    ->url(fn ($record) => $record->policy_id ? PolicyResource::getUrl('view', ['record' => $record->policy_id]) : null)
                    ->hidden(fn ($record) => ! $record->policy_id)
                    ->openUrlInNewTab(true),
                Actions\Action::make('remove')
                    ->label('Remove')
                    ->color('danger')
                    ->icon('heroicon-o-x-mark')
                    ->requiresConfirmation()
                    ->action(function (BackupItem $record, AuditLogger $auditLogger) {
                        $record->delete();

                        if ($record->backupSet) {
                            $record->backupSet->update([
                                'item_count' => $record->backupSet->items()->count(),
                            ]);
                        }

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

                        Notification::make()
                            ->title('Policy removed from backup')
                            ->success()
                            ->send();
                    }),
            ])
            ->bulkActions([]);
    }

    /**
     * @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) ?? [];
    }
}