<?php

declare(strict_types=1);

namespace Modules\RestaurantDelivery\Observers;

use Illuminate\Support\Facades\Log;
use Modules\RestaurantDelivery\Enums\DeliveryStatus;
use Modules\RestaurantDelivery\Models\Delivery;
use Modules\RestaurantDelivery\Services\Tracking\LiveTrackingService;

class DeliveryObserver
{
    public function __construct(
        protected LiveTrackingService $trackingService
    ) {}

    /**
     * Handle the Delivery "created" event.
     */
    public function created(Delivery $delivery): void
    {
        Log::info('Delivery created', [
            'delivery_id' => $delivery->id,
            'tracking_code' => $delivery->tracking_code,
        ]);
    }

    /**
     * Handle the Delivery "updated" event.
     */
    public function updated(Delivery $delivery): void
    {
        // Check if status changed
        if ($delivery->isDirty('status')) {
            $this->handleStatusChange($delivery);
        }

        // Check if rider changed
        if ($delivery->isDirty('rider_id')) {
            $this->handleRiderChange($delivery);
        }
    }

    /**
     * Handle status change.
     */
    protected function handleStatusChange(Delivery $delivery): void
    {
        $originalStatus = $delivery->getOriginal('status');

        Log::info('Delivery status changed', [
            'delivery_id' => $delivery->id,
            'from' => $originalStatus,
            'to' => $delivery->status->value,
        ]);

        // Handle specific status transitions
        if ($delivery->status === DeliveryStatus::DELIVERED) {
            $this->handleDeliveryCompleted($delivery);
        }

        if ($delivery->status === DeliveryStatus::CANCELLED) {
            $this->handleDeliveryCancelled($delivery);
        }
    }

    /**
     * Handle rider change.
     */
    protected function handleRiderChange(Delivery $delivery): void
    {
        $originalRiderId = $delivery->getOriginal('rider_id');
        $newRiderId = $delivery->rider_id;

        Log::info('Delivery rider changed', [
            'delivery_id' => $delivery->id,
            'from_rider' => $originalRiderId,
            'to_rider' => $newRiderId,
        ]);

        // Reinitialize tracking with new rider
        if ($newRiderId) {
            $this->trackingService->initializeDeliveryTracking($delivery);
        }
    }

    /**
     * Handle delivery completed.
     */
    protected function handleDeliveryCompleted(Delivery $delivery): void
    {
        // End tracking
        $this->trackingService->endDeliveryTracking($delivery);

        Log::info('Delivery completed', [
            'delivery_id' => $delivery->id,
            'rider_id' => $delivery->rider_id,
            'duration_minutes' => $delivery->getActualDuration(),
        ]);
    }

    /**
     * Handle delivery cancelled.
     */
    protected function handleDeliveryCancelled(Delivery $delivery): void
    {
        // End tracking
        $this->trackingService->endDeliveryTracking($delivery);

        Log::info('Delivery cancelled', [
            'delivery_id' => $delivery->id,
            'cancelled_by' => $delivery->cancelled_by,
            'reason' => $delivery->cancellation_reason,
        ]);
    }

    /**
     * Handle the Delivery "deleted" event.
     */
    public function deleted(Delivery $delivery): void
    {
        // End tracking if still active
        if ($delivery->isActive()) {
            $this->trackingService->endDeliveryTracking($delivery);
        }

        Log::info('Delivery deleted', [
            'delivery_id' => $delivery->id,
        ]);
    }
}