<?php

namespace App\Console\Commands;

use Acme\Dhl\Models\DhlShipment;
use App\Mail\MailDhlTracking;
use App\Services\DhlTrackingService;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Mail;

class DhlUpdateTracking extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'dhl:update-tracking
                            {--days=14 : Sendungen der letzten X Tage aktualisieren}
                            {--send-emails : Automatisch E-Mails bei Transit-Status senden}
                            {--dry-run : Nur simulieren, keine Änderungen}
                            {--test-email= : Test-E-Mail an angegebene Adresse senden}
                            {--order= : Nur für bestimmte Bestellung (Order-ID)}';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Aktualisiert Tracking-Status für alle aktiven DHL Sendungen und sendet automatisch E-Mails bei Transit-Status';

    /**
     * Execute the console command.
     */
    public function handle(): int
    {
        $days = (int) $this->option('days');
        $sendEmails = $this->option('send-emails');
        $dryRun = $this->option('dry-run');
        $testEmail = $this->option('test-email');
        $orderId = $this->option('order');

        $this->info('DHL Tracking Update gestartet');
        $this->info("Optionen: --days={$days}, --send-emails=" . ($sendEmails ? 'ja' : 'nein') . ', --dry-run=' . ($dryRun ? 'ja' : 'nein'));
        if ($testEmail) {
            $this->info("Test-Modus: E-Mails werden an {$testEmail} gesendet");
        }
        if ($orderId) {
            $this->info("Filter: Nur Order-ID {$orderId}");
        }
        $this->newLine();

        // Hole alle aktiven Sendungen der letzten X Tage
        $query = DhlShipment::active()
            ->where('created_at', '>=', now()->subDays($days))
            ->whereNotNull('dhl_shipment_no');

        // Filter nach Order-ID wenn angegeben
        if ($orderId) {
            $query->where('order_id', $orderId);
        }

        $shipments = $query->orderBy('created_at', 'desc')->get();

        $total = $shipments->count();
        $this->info("Gefundene aktive Sendungen: {$total}");

        if ($total === 0) {
            $this->info('Keine Sendungen zum Aktualisieren gefunden.');

            return self::SUCCESS;
        }

        $bar = $this->output->createProgressBar($total);
        $bar->start();

        $trackingService = new DhlTrackingService;
        $stats = [
            'updated' => 0,
            'failed' => 0,
            'emails_sent' => 0,
            'skipped' => 0,
        ];

        foreach ($shipments as $shipment) {
            try {
                $oldStatus = $shipment->status;

                if (! $dryRun) {
                    // Tracking aktualisieren
                    $result = $trackingService->updateTracking($shipment, ['auto_retrack' => false]);

                    if ($result['success']) {
                        $shipment->refresh();
                        $stats['updated']++;

                        // Prüfen ob E-Mail gesendet werden soll
                        if ($sendEmails && $this->shouldSendEmail($shipment, $oldStatus)) {
                            $this->sendTrackingEmail($shipment, $testEmail);
                            $stats['emails_sent']++;
                        }
                    } else {
                        $stats['failed']++;
                        Log::warning('[DHL Cron] Tracking update failed', [
                            'shipment_id' => $shipment->id,
                            'message' => $result['message'] ?? 'Unknown error',
                        ]);
                    }
                } else {
                    $stats['skipped']++;
                }
            } catch (\Exception $e) {
                $stats['failed']++;
                Log::error('[DHL Cron] Exception during tracking update', [
                    'shipment_id' => $shipment->id,
                    'error' => $e->getMessage(),
                ]);
            }

            $bar->advance();
        }

        $bar->finish();
        $this->newLine(2);

        // Zusammenfassung
        $this->info('Zusammenfassung:');
        $this->table(
            ['Metrik', 'Anzahl'],
            [
                ['Gesamt', $total],
                ['Aktualisiert', $stats['updated']],
                ['Fehlgeschlagen', $stats['failed']],
                ['E-Mails gesendet', $stats['emails_sent']],
                ['Übersprungen (Dry-Run)', $stats['skipped']],
            ]
        );

        Log::info('[DHL Cron] Tracking update completed', $stats);

        return self::SUCCESS;
    }

    /**
     * Prüft ob eine E-Mail gesendet werden soll
     */
    private function shouldSendEmail(DhlShipment $shipment, string $oldStatus): bool
    {
        // E-Mail nur senden wenn:
        // 1. Status ist jetzt "in_transit"
        // 2. Vorheriger Status war NICHT "in_transit" (also Status hat sich geändert)
        // 3. Noch keine E-Mail gesendet wurde
        return $shipment->status === 'in_transit'
            && $oldStatus !== 'in_transit'
            && ! $shipment->wasTrackingEmailSent()
            && $shipment->canSendTrackingEmail();
    }

    /**
     * Sendet die Tracking-E-Mail (mit Unterstützung für mehrere Sendungen pro Bestellung)
     */
    private function sendTrackingEmail(DhlShipment $shipment, ?string $testEmail = null): void
    {
        try {
            $order = $shipment->shoppingOrder;

            // Determine recipient email: test email > shipment email > shopping user email
            $recipientEmail = null;
            if ($testEmail) {
                $recipientEmail = $testEmail;
            } elseif (! empty($shipment->email)) {
                $recipientEmail = $shipment->email;
            } elseif ($order->shopping_user && ! empty($order->shopping_user->email)) {
                $recipientEmail = $order->shopping_user->email;
            }

            if (! $recipientEmail) {
                Log::warning('[DHL Cron] Cannot send email - no recipient', [
                    'shipment_id' => $shipment->id,
                ]);

                return;
            }

            // Sammle alle Sendungen für diese Bestellung, die noch keine E-Mail erhalten haben
            $allShipments = DhlShipment::where('order_id', $order->id)
                ->where('status', 'in_transit')
                ->whereNotNull('dhl_shipment_no')
                ->whereNull('tracking_email_sent_at')
                ->get();

            // Wenn keine Sendungen gefunden, nutze nur die aktuelle
            if ($allShipments->isEmpty()) {
                $allShipments = collect([$shipment]);
            }

            // Sende E-Mail mit allen Sendungen
            Mail::to($recipientEmail)->send(new MailDhlTracking($allShipments, $order));

            // Markiere alle Sendungen als versendet
            foreach ($allShipments as $s) {
                $s->markTrackingEmailSent('auto');
            }

            Log::info('[DHL Cron] Tracking email sent automatically', [
                'shipment_ids' => $allShipments->pluck('id')->toArray(),
                'shipments_count' => $allShipments->count(),
                'dhl_shipment_nos' => $allShipments->pluck('dhl_shipment_no')->toArray(),
                'email' => $recipientEmail,
                'is_test' => ! is_null($testEmail),
            ]);

            if ($allShipments->count() > 1) {
                $this->line("  -> E-Mail mit {$allShipments->count()} Sendungen gesendet an: {$recipientEmail}");
            } else {
                $this->line("  -> E-Mail gesendet an: {$recipientEmail}");
            }
        } catch (\Exception $e) {
            Log::error('[DHL Cron] Failed to send tracking email', [
                'shipment_id' => $shipment->id,
                'error' => $e->getMessage(),
            ]);
        }
    }
}