<?php

namespace App\Services;

use Illuminate\Support\Facades\Log;
use Stripe\Exception\ApiErrorException;
use Stripe\StripeClient;

/**
 * Centralised Stripe refund & payment-method management.
 *
 * Every action is logged. Every response is a simple array so callers
 * can show user-friendly notifications without catching exceptions.
 */
class StripeRefundService
{
    private StripeClient $stripe;

    public function __construct()
    {
        $this->stripe = new StripeClient(config('paisa.gateways.stripe.secret_key'));
    }

    // ── Refund a PaymentIntent (full or partial) ────────────────

    public function refundPaymentIntent(string $paymentIntentId, ?int $amountInPence = null, string $reason = ''): array
    {
        try {
            $params = [
                'payment_intent' => $paymentIntentId,
                'reason' => 'requested_by_customer',
            ];

            if ($amountInPence !== null && $amountInPence > 0) {
                $params['amount'] = $amountInPence;
            }

            $refund = $this->stripe->refunds->create($params);

            Log::info('Stripe refund created', [
                'refund_id'      => $refund->id,
                'payment_intent' => $paymentIntentId,
                'amount'         => $refund->amount,
                'status'         => $refund->status,
                'reason'         => $reason,
            ]);

            return [
                'success'   => true,
                'refund_id' => $refund->id,
                'amount'    => $refund->amount,
                'status'    => $refund->status,
            ];
        } catch (ApiErrorException $e) {
            Log::error('Stripe refund failed', [
                'payment_intent' => $paymentIntentId,
                'error'          => $e->getMessage(),
                'reason'         => $reason,
            ]);

            return ['success' => false, 'error' => $e->getMessage()];
        }
    }

    // ── Detach payment method from a SetupIntent ────────────────
    // This is how we "cancel" recurring: remove the card so no
    // future charges can be made.

    public function detachPaymentMethod(string $setupIntentId): array
    {
        try {
            $si = $this->stripe->setupIntents->retrieve($setupIntentId);

            if (! $si->payment_method) {
                return ['success' => true, 'message' => 'No payment method attached'];
            }

            $pmId = is_string($si->payment_method)
                ? $si->payment_method
                : $si->payment_method->id;

            $this->stripe->paymentMethods->detach($pmId);

            Log::info('Stripe payment method detached', [
                'setup_intent'   => $setupIntentId,
                'payment_method' => $pmId,
            ]);

            return [
                'success'        => true,
                'message'        => "Payment method {$pmId} detached",
                'payment_method' => $pmId,
            ];
        } catch (ApiErrorException $e) {
            Log::error('Failed to detach payment method', [
                'setup_intent' => $setupIntentId,
                'error'        => $e->getMessage(),
            ]);

            return ['success' => false, 'error' => $e->getMessage()];
        }
    }

    // ── Retrieve PaymentIntent details for display ──────────────

    public function getPaymentDetails(string $paymentIntentId): ?array
    {
        try {
            $pi = $this->stripe->paymentIntents->retrieve($paymentIntentId, [
                'expand' => ['latest_charge'],
            ]);

            $charge = $pi->latest_charge;

            return [
                'id'              => $pi->id,
                'status'          => $pi->status,
                'amount'          => $pi->amount,
                'currency'        => strtoupper($pi->currency),
                'created'         => date('d M Y H:i', $pi->created),
                'refunded'        => $charge?->refunded ?? false,
                'amount_refunded' => $charge?->amount_refunded ?? 0,
                'card_brand'      => $charge?->payment_method_details?->card?->brand ?? null,
                'card_last4'      => $charge?->payment_method_details?->card?->last4 ?? null,
            ];
        } catch (ApiErrorException $e) {
            return null;
        }
    }

    // ── Retrieve SetupIntent details for display ────────────────

    public function getSetupIntentDetails(string $setupIntentId): ?array
    {
        try {
            $si = $this->stripe->setupIntents->retrieve($setupIntentId, [
                'expand' => ['payment_method'],
            ]);

            $pm = $si->payment_method;

            return [
                'id'                => $si->id,
                'status'            => $si->status,
                'created'           => date('d M Y H:i', $si->created),
                'payment_method_id' => is_string($pm) ? $pm : ($pm?->id ?? null),
                'card_brand'        => is_object($pm) ? ($pm->card?->brand ?? null) : null,
                'card_last4'        => is_object($pm) ? ($pm->card?->last4 ?? null) : null,
                'card_exp_month'    => is_object($pm) ? ($pm->card?->exp_month ?? null) : null,
                'card_exp_year'     => is_object($pm) ? ($pm->card?->exp_year ?? null) : null,
                'customer_id'       => $si->customer,
            ];
        } catch (ApiErrorException $e) {
            return null;
        }
    }
}