<?php
require_once 'main_account.php';

// Log the callback for debugging
file_put_contents('mpesa_callback.log', date('Y-m-d H:i:s') . " - " . file_get_contents('php://input') . "\n", FILE_APPEND);

$callbackData = json_decode(file_get_contents('php://input'), true);

if (isset($callbackData['Body']['stkCallback'])) {
    $stkCallback = $callbackData['Body']['stkCallback'];
    $checkoutRequestID = $stkCallback['CheckoutRequestID'];
    $resultCode = $stkCallback['ResultCode'];
    $resultDesc = $stkCallback['ResultDesc'];
    
    $mainAccount = new MainAccount();
    
    if ($resultCode == 0) {
        // Payment successful
        $callbackMetadata = $stkCallback['CallbackMetadata']['Item'];
        $amount = $callbackMetadata[0]['Value'];
        $mpesaReceipt = $callbackMetadata[1]['Value'];
        $phoneNumber = $callbackMetadata[4]['Value'];
        
        $mainAccount->updateTransactionStatus($checkoutRequestID, 'completed', $mpesaReceipt);
        
        // Log success
        error_log("Payment successful: $checkoutRequestID - $mpesaReceipt");
    } else {
        // Payment failed
        $mainAccount->updateTransactionStatus($checkoutRequestID, 'failed');
        
        // Log failure
        error_log("Payment failed: $checkoutRequestID - $resultDesc");
    }
    
    http_response_code(200);
    echo json_encode(['ResultCode' => 0, 'ResultDesc' => 'Accepted']);
} else {
    http_response_code(400);
    echo json_encode(['ResultCode' => 1, 'ResultDesc' => 'Invalid callback']);
}
?>