<?php

namespace App\Services;

use App\Models\Payment;
use App\Models\Webhook;
use App\Services\Pagarme\PagarmePaymentService;
use Illuminate\Support\Facades\Log;

class WebhookService
{
    private const PAYMENT_EVENTS = [
        'order.paid',
        'order.payment_failed',
        'order.canceled',
        'order.created',
        'order.closed',
        'order.updated',
        'charge.created',
        'charge.paid',
        'charge.payment_failed',
        'charge.refunded',
        'charge.pending',
        'charge.processing',
        'charge.underpaid',
        'charge.overpaid',
        'charge.partial_canceled',
        'charge.chargedback',
        'charge.updated',
    ];

    public function __construct(
        private readonly PagarmePaymentService $pagarmePaymentService,
        private readonly PaymentService $paymentService,
    ) {}

    public function handlePagarme(array $payload): ?Payment
    {
        $event   = $payload['type'] ?? null;
        $data    = $payload['data'] ?? [];
        $data    = is_array($data) ? $data : [];
        $webhook = $this->recordWebhook($payload, $event, $data);

        Log::channel('pagarme')->info('Pagar.me webhook received', [
            'hook_id' => $payload['id'] ?? null,
            'event'   => $event,
        ]);

        if (! in_array($event, self::PAYMENT_EVENTS, true)) {
            $webhook->update([
                'status'       => 'ignored',
                'processed_at' => now(),
            ]);

            return null;
        }

        $orderResponse = $this->normalizeOrderResponse($event, $data);
        $payment       = $this->findPayment($orderResponse);

        if (! $payment) {
            $webhook->update([
                'status'       => 'payment_not_found',
                'processed_at' => now(),
            ]);

            Log::channel('pagarme')->warning('Payment not found for Pagar.me webhook', [
                'hook_id'        => $payload['id'] ?? null,
                'event'          => $event,
                'order_id'       => $orderResponse['id'] ?? null,
                'charge_id'      => $orderResponse['charges'][0]['id'] ?? null,
                'transaction_id' => $orderResponse['charges'][0]['last_transaction']['id'] ?? null,
                'metadata'       => $orderResponse['metadata'] ?? [],
            ]);

            return null;
        }

        try {
            $payment = $this->pagarmePaymentService->applyGatewayResponseToPayment($payment, $orderResponse);

            $this->paymentService->syncScheduleStatusAfterPayment($payment->schedule, $payment);

            $webhook->update([
                'payment_id'   => $payment->id,
                'status'       => 'processed',
                'processed_at' => now(),
            ]);

            return $payment;
        } catch (\Throwable $e) {
            $webhook->update([
                'payment_id'    => $payment->id,
                'status'        => 'failed',
                'processed_at'  => now(),
                'error_message' => $e->getMessage(),
            ]);

            throw $e;
        }
    }

    private function recordWebhook(array $payload, ?string $event, array $data): Webhook
    {
        $references = $this->extractReferences($event, $data);
        $hookId     = $payload['id'] ?? null;

        $attributes = [
            'hook_id'        => $hookId,
            'provider'       => 'pagarme',
            'event'          => $event,
            'account_id'     => $payload['account']['id'] ?? null,
            'order_id'       => $references['order_id'],
            'charge_id'      => $references['charge_id'],
            'transaction_id' => $references['transaction_id'],
            'status'         => 'received',
            'payload'        => $payload,
            'received_at'    => now(),
            'processed_at'   => null,
            'error_message'  => null,
        ];

        if (empty($hookId)) {
            return Webhook::create($attributes);
        }

        $webhook = Webhook::firstOrNew([
            'provider' => 'pagarme',
            'hook_id'  => $hookId,
        ]);

        $webhook->fill([
            ...$attributes,
            'attempts_count' => $webhook->exists ? $webhook->attempts_count + 1 : 1,
        ])->save();

        return $webhook;
    }

    private function extractReferences(?string $event, array $data): array
    {
        if (str_starts_with((string) $event, 'order.')) {
            $charge = $data['charges'][0] ?? [];

            return [
                'order_id'       => $data['id'] ?? null,
                'charge_id'      => $charge['id'] ?? null,
                'transaction_id' => $charge['last_transaction']['id'] ?? null,
            ];
        }

        if (str_starts_with((string) $event, 'charge.')) {
            return [
                'order_id'       => $data['order']['id'] ?? $data['order_id'] ?? null,
                'charge_id'      => $data['id'] ?? null,
                'transaction_id' => $data['last_transaction']['id'] ?? null,
            ];
        }

        return [
            'order_id'       => null,
            'charge_id'      => null,
            'transaction_id' => null,
        ];
    }

    private function normalizeOrderResponse(?string $event, array $data): array
    {
        if (str_starts_with((string) $event, 'order.')) {
            return $data;
        }

        return [
            'id'       => $data['order']['id'] ?? $data['order_id'] ?? null,
            'metadata' => $data['metadata'] ?? $data['order']['metadata'] ?? [],
            'charges'  => [$data],
        ];
    }

    private function findPayment(array $orderResponse): ?Payment
    {
        $charge        = $orderResponse['charges'][0] ?? [];
        $transaction   = $charge['last_transaction'] ?? [];
        $metadata      = $orderResponse['metadata'] ?? $charge['metadata'] ?? [];
        $metadataId    = filter_var($metadata['payment_id'] ?? null, FILTER_VALIDATE_INT) ?: null;
        $chargeId      = $charge['id'] ?? null;
        $transactionId = $transaction['id'] ?? null;
        $orderId       = $orderResponse['id'] ?? null;
        $references    = array_filter([$metadataId, $chargeId, $transactionId, $orderId]);

        if (empty($references)) {
            return null;
        }

        return Payment::query()
            ->where('gateway_provider', 'pagarme')
            ->where(function ($query) use ($metadataId, $chargeId, $transactionId, $orderId) {
                $query
                    ->when($metadataId, fn ($query) => $query->orWhere('id', $metadataId))
                    ->when($chargeId, fn ($query) => $query->orWhere('gateway_entity_reference', $chargeId))
                    ->when($transactionId, fn ($query) => $query->orWhere('gateway_operation_reference', $transactionId))
                    ->when($orderId, fn ($query) => $query->orWhere(function ($query) use ($orderId) {
                        $query->where('gateway_entity_label', 'order')
                            ->where('gateway_entity_reference', $orderId);
                    }));
            })
            ->latest('id')
            ->first();
    }
}