<?php

require_once('./inc/header.inc.php');
require_once(BX_DIRECTORY_PATH_INC . "profiles.inc.php");
require_once(BX_DIRECTORY_PATH_INC . "design.inc.php");

define('BX_API', true);

header('Content-Type: application/json');

if (!getParam('sys_api_enable')) {
    header('HTTP/1.0 403 Forbidden');
    echo json_encode(['status' => 403, 'error' => _t("_Access denied")]);
    exit;
}

$sOriginHeader = isset($_SERVER['HTTP_ORIGIN']) ? $_SERVER['HTTP_ORIGIN'] : false;
$sAuthHeader = isset($_SERVER['HTTP_AUTHORIZATION']) ? $_SERVER['HTTP_AUTHORIZATION'] : false;

if (getParam('sys_api_access_by_origin') && $sOriginHeader) {

    if (parse_url($sOriginHeader, PHP_URL_HOST) != parse_url(BX_DOL_URL_ROOT, PHP_URL_HOST)) {

        if (!BxDolApiQuery::getInstance()->getOrigin($sOriginHeader)) {
            header('HTTP/1.0 403 Forbidden');
            echo json_encode(['status' => 403, 'error' => _t("_Access denied")]);
            exit;
        }

        header('Access-Control-Allow-Origin: ' . $sOriginHeader);
        
        if ('OPTIONS' == $_SERVER['REQUEST_METHOD']) {
            header('Access-Control-Allow-Methods: POST, GET');
            header('Access-Control-Allow-Headers: Accept-Encoding, Authorization, Cache-Control, Connection, Host, Origin, Pragma, Referer, User-Agent, X-Custom-Header, X-Requested-With');                    
            exit;
        }
    }
}
elseif ($sAuthHeader && getParam('sys_api_access_by_key')) {
    if (!BxDolApiQuery::getInstance()->getKey($sAuthHeader)) {
        header('HTTP/1.0 403 Forbidden');
        echo json_encode(['status' => 403, 'error' => _t("_Access denied")]);
        exit;
    }
}
else {
    header('HTTP/1.0 403 Forbidden');
    echo json_encode(['status' => 403, 'error' => _t("_Access denied")]);
    exit;
}

$aRequest = isset($_GET['r']) ? explode('/', $_GET['r']) : [];

$a = ['sModule', 'sMethod', 'sClass'];
foreach ($aRequest as $i => $v)
    if (isset($a[$i]) && preg_match('/^[A-Za-z0-9_-]+$/', $v))
        ${$a[$i]} = $v;

if (!isset($sClass))
    $sClass = 'Module';

foreach ($a as $v) {
    if (!isset($$v)) {
        header('HTTP/1.0 404 Not Found');
        header('Status: 404 Not Found');
        echo json_encode(['status' => 404, 'error' => _t("_sys_request_page_not_found_cpt")]);
        exit;
    }
}

if (!BxDolRequest::serviceExists($sModule, $sMethod, $sClass)) {
    header('HTTP/1.0 404 Not Found');
    header('Status: 404 Not Found');
    echo json_encode(['status' => 404, 'error' => _t("_sys_request_page_not_found_cpt")]);
    exit;
}

if (!($aParams = bx_get('params')))
    $aParams = array();
elseif (is_string($aParams) && preg_match('/^\[.*\]$/', $aParams))
    $aParams = @json_decode($aParams);

if (!is_array($aParams))
    $aParams = array($aParams);

$mixedRet = BxDolService::call($sModule, $sMethod, $aParams, $sClass);

if (is_array($mixedRet) && isset($mixedRet['error'])) { 
    header('HTTP/1.0 500 Internal Server Error');
    header('Status: 500 Internal Server Error');
    $a = [
        'status' => 500, 
        'error' => isset($mixedRet['desc']) ? $mixedRet['desc'] : $mixedRet['error']
    ];
    if (isset($mixedRet['code']))
        $a['code'] = $mixedRet['code'];
    echo json_encode($a);
    exit;
}

echo json_encode([
    'status' => 200,
    'module' => $sModule,
    'method' => $sMethod,
    'params' => $aParams,
    'data' => $mixedRet,
]);