<?php
$request = file_get_contents('php://input');
$payload = json_decode($request, true) ?: $_POST ?: [];

zinipay_log('Incoming Webhook', $payload);

$settings = function_exists('getPaymentGateway') ? getPaymentGateway('zinipay') : [];
$invoiceId = $payload['metadata']['invoiceId'] ?? $_REQUEST['invoiceId'] ?? null;
$transactionId = $payload['transactionId'] ?? $payload['val_id'] ?? null;
$amount = $payload['amount'] ?? 0;

if ($invoiceId) {
    $recorded = false;
    if (function_exists('addPayment')) {
        @addPayment($invoiceId, $transactionId ?? uniqid('zinipay_'), $amount, 0, 'zinipay');
        $recorded = true;
    } elseif (function_exists('invoicePaymentAdd')) {
        @invoicePaymentAdd($invoiceId, $transactionId ?? uniqid('zinipay_'), $amount, 0, 'zinipay');
        $recorded = true;
    }
    if ($recorded) zinipay_log('Payment Recorded via Webhook', ['invoice'=>$invoiceId,'transaction'=>$transactionId,'amount'=>$amount]);
}

http_response_code(200);
echo 'OK';
exit;

function zinipay_log($title, $data = []) {
    $logDir = realpath(__DIR__ . '/../../storage/logs') ?: (__DIR__ . '/../../storage/logs');
    if (!is_dir($logDir)) @mkdir($logDir, 0777, true);
    $logFile = $logDir . '/gateway_zinipay.log';
    $time = date("Y-m-d H:i:s");
    $entry = "[$time] $title\n" . print_r($data,true) . "\n-------------------\n";
    @file_put_contents($logFile, $entry, FILE_APPEND | LOCK_EX);
}