<?php

namespace Modules\Core\Privacy\RelationManagers;

use Filament\Actions\Action;
use Filament\Forms\Components\Checkbox;
use Filament\Infolists\Components\RepeatableEntry;
use Filament\Infolists\Components\TextEntry;
use Filament\Notifications\Notification;
use Filament\Tables\Table;
use Illuminate\Database\Eloquent\Model;
use Modules\Core\Customer\RelationManagers\UserRelationManager as CoreUserRelationManager;
use Modules\Core\Privacy\Models\DataErasureRequest;
use Modules\Core\Privacy\Services\PrivacyService;

/**
 * Extends core's own Customer -> User relation manager to add:
 *   - a "Privacy Requests" row action, since a User's erasure/export requests
 *     can't be shown as a nested relation manager two levels deep (Customer ->
 *     User -> Requests isn't a shape Filament relation managers support) — a
 *     modal listing that specific User's requests is the practical alternative.
 *   - a "Request Erasure" row action — the User-scoped panel entry point,
 *     mirroring Modules\Core\Privacy\Filament\Extensions\
 *     CustomerErasureActionsExtension on the Customer side, including the same
 *     "erase immediately" checkbox for a staff-triggered urgent request.
 * See docs/privacy.md "User-scope vs Customer-scope".
 */
class UserRelationManager extends CoreUserRelationManager
{
    public function getDefaultTable(Table $table): Table
    {
        $table = parent::getDefaultTable($table);

        return $table->recordActions([
            ...$table->getActions(),
            Action::make('privacyRequests')
                ->label('Privacy Requests')
                ->icon('heroicon-o-shield-exclamation')
                ->modalHeading(fn (Model $record) => "Privacy requests for {$record->name}")
                ->modalSubmitAction(false)
                ->modalCancelActionLabel('Close')
                ->schema(fn (Model $record) => $this->requestsInfolist($record)),
            Action::make('requestErasure')
                ->label('Request Erasure')
                ->icon('heroicon-o-shield-exclamation')
                ->color('danger')
                ->requiresConfirmation()
                ->modalDescription('Opens a cancellable grace-period erasure request for this individual — deactivates their login and detaches them from every linked Customer account once it completes. No Customer account\'s own data is affected.')
                ->schema([
                    Checkbox::make('immediate')
                        ->label('Erase immediately (skip the 30-day grace period)')
                        ->helperText('Staff-only, for a formal legal request or regulator inquiry that genuinely requires urgency — not a routine deletion. Runs synchronously, cannot be cancelled once submitted.')
                        ->default(false),
                ])
                ->action(function (Model $record, array $data) {
                    $privacyService = app(PrivacyService::class);
                    $staff = auth('staff')->user();

                    if ($data['immediate']) {
                        $privacyService->requestImmediateErasureForUser($record, $staff);

                        Notification::make()
                            ->title('User erased')
                            ->body('Erasure ran immediately — see the Erasure Requests list for the outcome.')
                            ->success()
                            ->send();

                        return;
                    }

                    $privacyService->requestErasureForUser($record, $staff);

                    Notification::make()
                        ->title('Erasure requested')
                        ->body('The grace period starts now, and this user\'s login is deactivated immediately — see the Erasure Requests list.')
                        ->success()
                        ->send();
                }),
        ]);
    }

    private function requestsInfolist(Model $record): array
    {
        return [
            TextEntry::make('erasure_heading')
                ->label('')
                ->state('Erasure Requests'),
            RepeatableEntry::make('erasureRequests')
                ->label('')
                ->state(fn () => $record->erasureRequests()->latest()->get())
                ->schema([
                    TextEntry::make('status')->formatStateUsing(fn ($state) => ucfirst($state->value)),
                    TextEntry::make('scheduled_for')->dateTime(),
                    TextEntry::make('requestedBy')->label('Requested by')->state(
                        fn (DataErasureRequest $record) => DataErasureRequest::displayNameFor($record->requestedBy)
                    ),
                ])
                ->columns(3),
            TextEntry::make('export_heading')
                ->label('')
                ->state('Export Requests'),
            RepeatableEntry::make('exportRequests')
                ->label('')
                ->state(fn () => $record->exportRequests()->latest()->get())
                ->schema([
                    TextEntry::make('status')->formatStateUsing(fn ($state) => ucfirst($state->value)),
                    TextEntry::make('created_at')->label('Requested at')->dateTime(),
                ])
                ->columns(2),
        ];
    }
}