<?php

namespace Modules\Core\Shipping\Extensions;

use Filament\Actions\Action;
use Filament\Infolists\Components\RepeatableEntry;
use Filament\Infolists\Components\TextEntry;
use Filament\Notifications\Notification;
use Filament\Schemas\Components\Section;
use Illuminate\Support\Facades\URL;
use Lunar\Admin\Support\Extending\ViewPageExtension;
use Modules\Core\Shipping\Contracts\CarrierFulfillmentInterface;
use Modules\Core\Shipping\Models\Shipment;
use Throwable;

/**
 * Adds a "Shipments" section to the order page's main column — previously
 * "Create Shipment" (Modules\Core\Shipping\Extensions\OrderViewExtension)
 * had no counterpart anywhere on the order to actually SEE what it
 * created (carrier, tracking reference, current status, whether a label's
 * been printed or the shipment cancelled). One row per Shipment record —
 * a Box Now order with several boxes shows one row per box/parcel (see
 * Modules\Core\Shipping\Carriers\BoxNow\BoxNowFulfillmentService, which
 * creates one Shipment row per parcel Box Now returns), not one row per
 * "Create Shipment" click.
 *
 * Uses the extendInfolistSchema hook (main column — alongside shipping
 * address, order lines, totals, transactions, timeline), not
 * extendInfolistAsideSchema (sidebar) — a shipment list can grow long
 * (multi-box Box Now orders, a re-dispatched order after a delivery
 * failure) and reads more naturally as a main-column section like
 * Transactions, not a compact sidebar entry.
 *
 * Each shipment renders as two inline-labelled lines (carrier + tracking
 * reference, then status + timestamp) rather than a grid of individually
 * stacked label/value blocks — Filament's own multi-column grid still
 * collapses to one column below its lg breakpoint (1024px), which is
 * exactly where the admin's main content area commonly sits with the
 * sidebar open, so a 5-6 field grid reads as a wall of repeated labels
 * there.
 *
 * "Print Label" opens Modules\Core\Shipping\Http\Controllers\
 * DownloadShipmentLabelController via a short-lived signed URL — the same
 * auth model (and Action wiring pattern) Lunar's own vendor PdfDownload
 * action uses for order PDFs. Previously the only place that called
 * CarrierFulfillmentInterface::printLabel() (Modules\Core\Shipping\
 * Filament\Pages\ManagePickupManifests) discarded the returned bytes
 * entirely — this is the first place that actually delivers a label to
 * staff.
 */
class OrderShipmentsExtension extends ViewPageExtension
{
    /**
     * Inserted right after Transactions and before Timeline — vendor
     * ManageOrder::getInfolistSchema() builds this array as
     * [shipping, orderLines, orderTotals, transactions, timeline] (see
     * Lunar\Admin\...\Concerns\DisplaysTransactions/DisplaysTimeline), so
     * splicing at index 4 lands the new section there regardless of how
     * many earlier entries any OTHER extension on this same hook has
     * already added/removed — counting from the end (timeline is always
     * last) would be equally fragile to some other extension appending
     * its own section after timeline, so this anchors on the known
     * vendor order instead.
     */
    public function extendInfolistSchema(array $schema): array
    {
        array_splice($schema, 4, 0, [$this->shipmentsSection()]);

        return $schema;
    }

    private function shipmentsSection(): Section
    {
        return Section::make('shipments')
            ->heading('Shipments')
            ->compact()
            ->collapsed(fn ($record) => $record->shipments->isEmpty())
            ->collapsible(fn ($record) => $record->shipments->isNotEmpty())
            ->schema([
                RepeatableEntry::make('shipments')
                    ->hiddenLabel()
                    ->placeholder('No shipments have been created for this order yet.')
                    ->contained(true)
                    ->schema([
                        TextEntry::make('tracking_reference')
                            ->label(fn (Shipment $record) => $this->carrierLabel($record))
                            ->inlineLabel()
                            ->copyable(),
                        TextEntry::make('status')
                            ->label('Status')
                            ->inlineLabel()
                            ->state(fn (Shipment $record) => $this->statusLabel($record))
                            ->badge()
                            ->color(fn (Shipment $record) => $this->statusColor($record))
                            ->helperText(fn (Shipment $record) => $this->helperText($record))
                            ->suffixActions([
                                Action::make('print_label')
                                    ->label('Print Label')
                                    ->icon('heroicon-o-printer')
                                    ->url(fn (Shipment $record) => URL::temporarySignedRoute(
                                        'shipments.label',
                                        now()->addMinutes(5),
                                        ['shipment' => $record->id],
                                    ), shouldOpenInNewTab: true)
                                    ->visible(fn (Shipment $record) => ! $record->cancelled_at),
                                Action::make('cancel_shipment')
                                    ->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) => $this->cancel($record))
                                    ->visible(fn (Shipment $record) => ! $record->cancelled_at),
                            ]),
                    ]),
            ]);
    }

    private function carrierLabel(Shipment $record): string
    {
        return match ($record->carrier) {
            'acs' => 'ACS',
            'box-now' => 'Box Now',
            default => (string) str($record->carrier)->title(),
        };
    }

    private function helperText(Shipment $record): string
    {
        $parts = ['Created '.$record->created_at->format('Y-m-d H:i')];

        if ($record->carrier === 'box-now' && $locker = $record->meta['locker_id'] ?? null) {
            $parts[] = 'Locker '.$locker;
        }

        return implode(' · ', $parts);
    }

    private function statusLabel(Shipment $record): string
    {
        if ($record->cancelled_at) {
            return 'Cancelled';
        }

        $latest = $record->latestShipmentInfo();

        return $latest ? (string) str($latest->status->value)->replace('_', ' ')->title() : 'Pending';
    }

    private function statusColor(Shipment $record): string
    {
        if ($record->cancelled_at) {
            return 'danger';
        }

        return match ($record->latestShipmentInfo()?->status?->value) {
            'delivered' => 'success',
            'failed', 'returned' => 'danger',
            'in_transit', 'out_for_delivery', 'collected_from_sender' => 'warning',
            default => 'gray',
        };
    }

    private function cancel(Shipment $record): void
    {
        $service = app(CarrierFulfillmentInterface::class, ['carrier' => $record->carrier]);

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

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

            return;
        }

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