<?php

namespace App\Http\Controllers;

use App\Events\ParcelCollected;
use App\Events\ParcelDelivered;
use App\Events\ParcelFailedDelivery;
use App\Events\ParcelInTransit;
use App\Models\Order;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Log;

class CourierWebhookController extends Controller
{
    /**
     * Handle incoming courier webhooks (Shiplogic)
     * 
     * POST /api/webhooks/courier
     */
    public function handle(Request $request)
    {
        // Verify webhook signature
        if (! $this->verifyWebhookSignature($request)) {
            Log::warning('Invalid courier webhook signature');

            return response()->json(['error' => 'Invalid signature'], 401);
        }

        try {
            $payload = $request->json()->all();

            Log::info('Courier webhook received', [
                'shipment_id' => $payload['shipment_id'] ?? 'unknown',
                'status' => $payload['status'] ?? 'unknown',
            ]);

            // Find order by waybill ID
            $order = Order::where('courier_waybill_id', $payload['waybill_id'] ?? null)->first();

            if (! $order) {
                Log::warning('Order not found for courier webhook', [
                    'waybill_id' => $payload['waybill_id'] ?? 'unknown',
                ]);

                return response()->json(['error' => 'Order not found'], 404);
            }

            // Handle status updates
            match ($payload['status'] ?? null) {
                'collected' => $this->handleParcelCollected($order, $payload),
                'in_transit' => $this->handleParcelInTransit($order, $payload),
                'delivered' => $this->handleParcelDelivered($order, $payload),
                'failed_delivery' => $this->handleParcelFailedDelivery($order, $payload),
                default => Log::info('Unhandled courier status', ['status' => $payload['status'] ?? 'unknown']),
            };

            return response()->json(['success' => true]);
        } catch (\Exception $e) {
            Log::error('Error processing courier webhook', ['error' => $e->getMessage()]);

            return response()->json(['error' => 'Processing failed'], 500);
        }
    }

    /**
     * Handle parcel collected status
     */
    private function handleParcelCollected(Order $order, array $payload): void
    {
        $order->update([
            'courier_status' => 'collected',
            'status' => 'in_transit',
        ]);

        ParcelCollected::dispatch($order, $order->courier_waybill_id);

        Log::info('Parcel collected', ['order_id' => $order->id]);
    }

    /**
     * Handle parcel in transit status
     */
    private function handleParcelInTransit(Order $order, array $payload): void
    {
        $order->update([
            'courier_status' => 'in_transit',
        ]);

        ParcelInTransit::dispatch($order, $order->courier_waybill_id);

        Log::info('Parcel in transit', ['order_id' => $order->id]);
    }

    /**
     * Handle parcel delivered status
     */
    private function handleParcelDelivered(Order $order, array $payload): void
    {
        $order->update([
            'courier_status' => 'delivered',
            'delivered_at' => now(),
            'status' => 'completed',
        ]);

        ParcelDelivered::dispatch($order, $order->courier_waybill_id);

        Log::info('Parcel delivered', ['order_id' => $order->id]);
    }

    /**
     * Handle parcel failed delivery status
     */
    private function handleParcelFailedDelivery(Order $order, array $payload): void
    {
        $reason = $payload['failure_reason'] ?? 'Unknown reason';

        $order->update([
            'courier_status' => 'failed',
            'delivery_failure_reason' => $reason,
        ]);

        ParcelFailedDelivery::dispatch($order, $order->courier_waybill_id, $reason);

        Log::info('Parcel delivery failed', [
            'order_id' => $order->id,
            'reason' => $reason,
        ]);
    }

    /**
     * Verify webhook signature (placeholder)
     */
    private function verifyWebhookSignature(Request $request): bool
    {
        // TODO: Implement Shiplogic HMAC verification
        // Compare signature with hash of request body using COURIER_WEBHOOK_SECRET
        // For now, accept all
        return true;
    }
}