<?php

namespace App\Jobs;

use App\Models\DhlShipment;
use App\Services\DhlApiService;
use Exception;
use Illuminate\Bus\Queueable as BusQueueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;
use Illuminate\Support\Facades\Log;

/**
 * Job to cancel DHL shipments asynchronously
 * 
 * This job handles the cancellation of DHL shipments in the background,
 * preventing API timeouts and improving user experience.
 */
class CancelShipmentJob implements ShouldQueue
{
    use BusQueueable, Dispatchable, InteractsWithQueue, SerializesModels;

    /**
     * @var DhlShipment
     */
    public $dhlShipment;

    /**
     * @var array
     */
    public $options;

    /**
     * The number of times the job may be attempted.
     *
     * @var int
     */
    public $tries = 3;

    /**
     * The maximum number of seconds the job can run before timing out.
     *
     * @var int
     */
    public $timeout = 60;

    /**
     * Create a new job instance.
     *
     * @param DhlShipment $dhlShipment
     * @param array $options
     */
    public function __construct(DhlShipment $dhlShipment, array $options = [])
    {
        $this->dhlShipment = $dhlShipment;
        $this->options = $options;
        
        // Set queue name based on priority
        if (isset($options['priority']) && $options['priority'] === 'high') {
            $this->onQueue('high-priority');
        } else {
            $this->onQueue('dhl-cancellations');
        }
    }

    /**
     * Execute the job.
     */
    public function handle(): void
    {
        try {
            Log::info('[DHL Queue] Starting shipment cancellation job', [
                'shipment_id' => $this->dhlShipment->id,
                'shipment_number' => $this->dhlShipment->shipment_number,
                'attempt' => $this->attempts(),
            ]);

            $dhlService = new DhlApiService();

            // Cancel the shipment
            $success = $dhlService->cancelShipment($this->dhlShipment);

            if ($success) {
                Log::info('[DHL Queue] Shipment cancelled successfully', [
                    'shipment_id' => $this->dhlShipment->id,
                    'shipment_number' => $this->dhlShipment->shipment_number,
                ]);
            } else {
                throw new Exception('Cancellation returned false');
            }

        } catch (Exception $e) {
            Log::error('[DHL Queue] Shipment cancellation failed', [
                'shipment_id' => $this->dhlShipment->id,
                'shipment_number' => $this->dhlShipment->shipment_number,
                'error' => $e->getMessage(),
                'attempt' => $this->attempts(),
                'max_tries' => $this->tries,
            ]);

            // If this is the final attempt, mark as permanently failed
            if ($this->attempts() >= $this->tries) {
                Log::error('[DHL Queue] Shipment cancellation permanently failed', [
                    'shipment_id' => $this->dhlShipment->id,
                    'error' => $e->getMessage(),
                ]);
            }

            throw $e; // Re-throw to trigger retry mechanism
        }
    }

    /**
     * Handle a job failure.
     *
     * @param Exception $exception
     */
    public function failed(Exception $exception): void
    {
        Log::error('[DHL Queue] CancelShipmentJob permanently failed', [
            'shipment_id' => $this->dhlShipment->id,
            'shipment_number' => $this->dhlShipment->shipment_number,
            'error' => $exception->getMessage(),
            'trace' => $exception->getTraceAsString(),
        ]);

        // You could implement additional failure handling here:
        // - Send notification to admin
        // - Create manual task for staff to handle cancellation
        // - Update shipment status to indicate cancellation failed
    }

    /**
     * Determine the time at which the job should timeout.
     *
     * @return \DateTime
     */
    public function retryUntil()
    {
        return now()->addHour(); // Shorter timeout for cancellations
    }
}