<?php

namespace Modules\Core\Shipping\Filament\Resources;

use Filament\Actions\Action;
use Filament\Actions\BulkAction;
use Filament\Notifications\Notification;
use Filament\Resources\Resource;
use Filament\Tables\Columns\TextColumn;
use Filament\Tables\Table;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\URL;
use Modules\Core\Shipping\Contracts\CarrierFulfillmentInterface;
use Modules\Core\Shipping\Contracts\SupportsBatchLabels;
use Modules\Core\Shipping\Contracts\SupportsManifestBatching;
use Modules\Core\Shipping\Filament\Resources\ShipmentResource\Pages\ListShipments;
use Modules\Core\Shipping\Models\Shipment;
use Throwable;

/**
 * Replaces the standalone Modules\Core\Shipping\Filament\Pages\
 * ManagePickupManifests page — a bare Page has no access to Filament's
 * resource-level pill-tab UI (Filament\Resources\Concerns\HasTabs is
 * scoped to ListRecords), so carrier-by-carrier separation
 * (ListShipments::getTabs()) needed a real Resource to attach to.
 *
 * Shows only shipments created through a carrier's API that are NOT yet on
 * an issued manifest — see Modules\Core\Shipping\Filament\Resources\
 * ManifestResource for shipments that already are. Manual carriers, manual
 * vouchers and carrier-reported (synced) vouchers have no label to print
 * or manifest to join, so they never show here.
 *
 * Print opens the label through the same signed URL as the order page; for
 * carriers that issue the voucher on print (ELTA), that first open is what
 * gives the shipment its voucher number.
 */
class ShipmentResource extends Resource
{
    protected static ?string $model = Shipment::class;

    protected static string | \BackedEnum | null $navigationIcon = 'heroicon-o-truck';

    protected static string | \UnitEnum | null $navigationGroup = 'Sales';

    protected static ?string $navigationLabel = 'Pending Vouchers';

    protected static ?string $modelLabel = 'Shipment';

    protected static ?int $navigationSort = 100;

    public static function getEloquentQuery(): Builder
    {
        return parent::getEloquentQuery()
            ->where('source', Shipment::SOURCE_CREATED)
            ->whereNotNull('order_id')
            ->whereNull('manifest_id')
            ->whereNull('cancelled_at');
    }

    public static function table(Table $table): Table
    {
        return $table
            ->defaultSort('created_at', 'desc')
            ->columns([
                TextColumn::make('carrier')
                    ->badge()
                    ->formatStateUsing(fn (Shipment $record) => $record->carrierLabel()),
                TextColumn::make('tracking_reference')
                    ->label('Tracking #')
                    ->placeholder('Not issued yet')
                    ->copyable(),
                TextColumn::make('order.reference')->label('Order'),
                TextColumn::make('created_at')->label('Created')->dateTime(),
                TextColumn::make('label_printed_at')->label('Printed')->dateTime()->placeholder('Not printed'),
            ])
            ->recordActions([
                Action::make('print')
                    ->label('Print')
                    ->icon('heroicon-o-printer')
                    ->url(fn (Shipment $record) => self::labelUrl($record), shouldOpenInNewTab: true),
                Action::make('cancel')
                    ->label('Cancel')
                    ->icon('heroicon-o-x-circle')
                    ->color('danger')
                    ->requiresConfirmation()
                    ->modalDescription('Cancels this shipment with the carrier. This cannot be undone.')
                    ->action(fn (Shipment $record) => self::cancelShipment($record)),
            ])
            ->toolbarActions([
                BulkAction::make('print_selected')
                    ->label('Print selected')
                    ->icon('heroicon-o-printer')
                    ->deselectRecordsAfterCompletion()
                    ->action(fn (Collection $records, $livewire) => self::printSelected($records, $livewire)),
                BulkAction::make('issue_manifest')
                    ->label('Issue Manifest')
                    ->icon('heroicon-o-check-circle')
                    ->visible(fn ($livewire) => filled($livewire->activeTab ?? null)
                        && self::fulfillmentService($livewire->activeTab) instanceof SupportsManifestBatching)
                    ->action(fn (Collection $records) => self::issueManifest($records)),
            ]);
    }

    public static function labelUrl(Shipment $shipment): string
    {
        return URL::temporarySignedRoute('shipments.label', now()->addMinutes(5), ['shipment' => $shipment->id]);
    }

    /**
     * One combined PDF for carriers that support it (opened in a new tab,
     * with a link in the notification in case the browser blocks the
     * pop-up); anything else has to be printed row by row.
     */
    public static function printSelected(Collection $shipments, $livewire): void
    {
        $carriers = $shipments->pluck('carrier')->unique();

        if ($carriers->count() !== 1) {
            Notification::make()
                ->title('Select shipments of a single carrier to print them together.')
                ->warning()
                ->send();

            return;
        }

        $shipment = $shipments->first();

        if (! self::fulfillmentService($shipment->carrier) instanceof SupportsBatchLabels) {
            Notification::make()
                ->title("{$shipment->carrierLabel()} labels can't be combined — print them individually.")
                ->warning()
                ->send();

            return;
        }

        $url = URL::temporarySignedRoute('shipments.labels', now()->addMinutes(5), [
            'ids' => $shipments->pluck('id')->sort()->implode(','),
        ]);

        $livewire->js('window.open('.json_encode($url).', "_blank")');

        Notification::make()
            ->title('Printing '.$shipments->count().' labels.')
            ->success()
            ->actions([
                Action::make('open')->label('Open PDF')->url($url, shouldOpenInNewTab: true),
            ])
            ->send();
    }

    public static function cancelShipment(Shipment $shipment): void
    {
        if ($shipment->cancelsLocallyOnly()) {
            $shipment->update(['cancelled_at' => now()]);

            Notification::make()
                ->title('Shipment marked as cancelled. Void the voucher with the courier as well.')
                ->success()
                ->send();

            return;
        }

        $service = self::fulfillmentService($shipment->carrier);

        try {
            if (! $service) {
                throw new \RuntimeException("No fulfillment integration configured for {$shipment->carrierLabel()}.");
            }

            $service->cancelShipment($shipment);
        } catch (Throwable $e) {
            report($e);

            Notification::make()
                ->title('Failed to cancel shipment: '.$e->getMessage())
                ->danger()
                ->send();

            return;
        }

        Notification::make()
            ->title('Shipment cancelled.')
            ->success()
            ->send();
    }

    public static function issueManifest(Collection $shipments): void
    {
        $shipments->groupBy('carrier')->each(function (Collection $group, string $carrier) {
            $service = self::fulfillmentService($carrier);

            if (! $service instanceof SupportsManifestBatching) {
                return;
            }

            try {
                $result = $service->issueManifest($group);
            } catch (Throwable $e) {
                report($e);

                Notification::make()
                    ->title("Failed to issue manifest for {$carrier}: {$e->getMessage()}")
                    ->danger()
                    ->send();

                return;
            }

            if (! $result->success) {
                Notification::make()
                    ->title("Manifest blocked for {$carrier}: {$result->reason}")
                    ->danger()
                    ->send();

                return;
            }

            Notification::make()
                ->title("Manifest issued for {$carrier}: {$result->reference}")
                ->success()
                ->send();
        });
    }

    public static function fulfillmentService(string $carrier): ?CarrierFulfillmentInterface
    {
        return app(CarrierFulfillmentInterface::class, ['carrier' => $carrier]);
    }

    public static function getPages(): array
    {
        return [
            'index' => ListShipments::route('/'),
        ];
    }
}