<?php

namespace App\Services\PayPal;

use App\Models\EventPackageAddon;
use App\Services\Addons\EventAddonPurchaseService;
use Illuminate\Support\Arr;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Log;

class PayPalAddonWebhookService
{
    public function __construct(private readonly EventAddonPurchaseService $addons) {}

    /**
     * @param  array<string, mixed>  $event
     */
    public function handle(array $event): bool
    {
        $eventType = $event['event_type'] ?? null;
        $resource = $event['resource'] ?? null;

        if (! is_string($eventType) || ! is_array($resource)) {
            return false;
        }

        $normalized = strtoupper($eventType);

        if (! in_array($normalized, [
            'PAYMENT.CAPTURE.COMPLETED',
            'PAYMENT.CAPTURE.PENDING',
            'PAYMENT.CAPTURE.DENIED',
            'PAYMENT.CAPTURE.REFUNDED',
            'CHECKOUT.ORDER.COMPLETED',
            'CHECKOUT.ORDER.VOIDED',
        ], true)) {
            return false;
        }

        $orderId = $this->resolveOrderId($normalized, $resource);

        if (! $orderId) {
            return false;
        }

        $addon = EventPackageAddon::query()
            ->where('checkout_id', $orderId)
            ->first();

        if (! $addon) {
            return false;
        }

        $lock = Cache::lock('addon:webhook:paypal:'.$orderId, 30);

        if (! $lock->get()) {
            Log::info('[PayPalAddonWebhook] lock busy', [
                'order_id' => $orderId,
                'addon_id' => $addon->id,
            ]);

            return true;
        }

        try {
            if ($addon->status === 'completed' && $normalized === 'PAYMENT.CAPTURE.COMPLETED') {
                return true;
            }

            if (in_array($normalized, ['PAYMENT.CAPTURE.COMPLETED', 'CHECKOUT.ORDER.COMPLETED'], true)) {
                $captureId = $this->resolveCaptureId($resource, $normalized);
                $totals = $this->resolveTotals($resource);

                $this->addons->complete(
                    $addon,
                    $resource,
                    $captureId,
                    $orderId,
                    $totals['total'] ?? null,
                    $totals['currency'] ?? null,
                    [
                        'paypal_order_id' => $orderId,
                        'paypal_capture_id' => $captureId,
                        'paypal_status' => $resource['status'] ?? null,
                        'paypal_totals' => $totals ?: null,
                        'paypal_captured_at' => now()->toIso8601String(),
                    ],
                );

                return true;
            }

            if (in_array($normalized, ['PAYMENT.CAPTURE.DENIED', 'PAYMENT.CAPTURE.REFUNDED', 'CHECKOUT.ORDER.VOIDED'], true)) {
                $reason = match ($normalized) {
                    'PAYMENT.CAPTURE.DENIED' => 'paypal_capture_denied',
                    'PAYMENT.CAPTURE.REFUNDED' => 'paypal_refunded',
                    'CHECKOUT.ORDER.VOIDED' => 'paypal_voided',
                    default => 'paypal_failed',
                };

                $this->addons->fail($addon, $reason, $resource);

                return true;
            }

            return false;
        } finally {
            $lock->release();
        }
    }

    /**
     * @param  array<string, mixed>  $resource
     */
    protected function resolveOrderId(string $eventType, array $resource): ?string
    {
        if (str_starts_with($eventType, 'PAYMENT.CAPTURE.')) {
            $relatedOrderId = Arr::get($resource, 'supplementary_data.related_ids.order_id');

            return is_string($relatedOrderId) && $relatedOrderId !== '' ? $relatedOrderId : null;
        }

        $orderId = $resource['id'] ?? null;

        return is_string($orderId) && $orderId !== '' ? $orderId : null;
    }

    /**
     * @param  array<string, mixed>  $resource
     */
    protected function resolveCaptureId(array $resource, string $eventType): ?string
    {
        if (str_starts_with($eventType, 'PAYMENT.CAPTURE.')) {
            $captureId = $resource['id'] ?? null;

            return is_string($captureId) && $captureId !== '' ? $captureId : null;
        }

        $captureId = Arr::get($resource, 'purchase_units.0.payments.captures.0.id');

        return is_string($captureId) && $captureId !== '' ? $captureId : null;
    }

    /**
     * @param  array<string, mixed>  $resource
     * @return array{currency?: string, total?: float}
     */
    protected function resolveTotals(array $resource): array
    {
        $amount = Arr::get($resource, 'amount')
            ?? Arr::get($resource, 'purchase_units.0.payments.captures.0.amount')
            ?? Arr::get($resource, 'purchase_units.0.amount');

        if (! is_array($amount)) {
            return [];
        }

        $currency = Arr::get($amount, 'currency_code');
        $total = Arr::get($amount, 'value');

        return array_filter([
            'currency' => is_string($currency) ? strtoupper($currency) : null,
            'total' => is_numeric($total) ? (float) $total : null,
        ], static fn ($value) => $value !== null);
    }
}