<?if(!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die();
// ALLOW_UPLOAD = 'A'll files | 'I'mages | 'F'iles with selected extensions | 'N'one
// ALLOW_UPLOAD_EXT = comma-separated list of allowed file extensions (ALLOW_UPLOAD='F')

use Bitrix\Main\Error;
use Bitrix\Main\ErrorCollection;
use Bitrix\Main\Event;

include_once(__DIR__."/file.php");

class MFIComponent extends \CBitrixComponent
{
	/** @var ErrorCollection */
	protected $errorCollection;
	/** @var string  */
	protected $componentId = '';
	/** @var MFIController */
	protected $controller;

	public function __construct($component = null)
	{
		parent::__construct($component);
		$this->errorCollection = new ErrorCollection();
		$this->componentId = $this->isAjaxRequest()? randString(7) : $this->randString();
		$this->controller = new MFIController;
	}

	/**
	 * @return bool|string
	 */
	public function executeComponent()
	{
		try
		{
			$this->prepareParams();
			$this->controller->
				setModuleId($this->arParams["MODULE_ID"])->
				setForceMd5($this->arParams["FORCE_MD5"])->
				generateCid($this->arParams["CONTROL_ID"]);

			if ($this->arParams['ALLOW_UPLOAD'])
				$this->controller->initUploader(array(
					"allowUpload" => $this->arParams["ALLOW_UPLOAD"],
					"allowUploadExt" => $this->arParams["ALLOW_UPLOAD_EXT"],
					"uploadMaxFilesize" => $this->arParams['MAX_FILE_SIZE']
				));
			$this->controller->checkRequest($this->arParams["CONTROL_UNIQUE_ID"]);

			$this->arParams["URL_TO_UPLOAD"] = $this->controller->getUrlUpload();
			$this->arParams["CONTROL_UID"] = $this->arResult["CONTROL_UID"] = $this->controller->getCid();
			$this->arParams["CONTROL_SIGN"] = $this->controller->getSignature(
				array(
					"moduleId" => $this->arParams["MODULE_ID"],
					"forceMd5" => $this->arParams["FORCE_MD5"],
					"allowUpload" => $this->arParams["ALLOW_UPLOAD"],
					"allowUploadExt" => $this->arParams["ALLOW_UPLOAD_EXT"],
					"uploadMaxFilesize" => $this->arParams['MAX_FILE_SIZE']
				)
			);

			$value = $this->arParams['INPUT_VALUE'] ?? '';
			if (is_array($value) && implode(",", $value) <> '')
			{
				$dbRes = CFile::GetList(array(), array("@ID" => implode(",", $value)));
				while ($file = $dbRes->GetNext())
				{
					$this->controller->registerFile($file['ID']);
					$file['URL'] = $this->controller->getUrlDownload($file['ID']);
					$file['URL_DELETE'] = $this->controller->getUrlDelete($file['ID']);
					$file['FILE_SIZE_FORMATTED'] = CFile::FormatSize($file['FILE_SIZE']);
					$file["SRC"] = CFile::GetFileSRC($file);
					$this->arResult['FILES'][$file['ID']] = $file;
				}
			}

			$event = new Event('main', 'main.file.input', [$this->arResult, $this->arParams]);
			$event->send();

			$this->includeComponentTemplate();
			return $this->arParams['CONTROL_UNIQUE_ID'];
		}
		catch(\Exception $e)
		{
			$this->errorCollection->add(array(new Error($e->getMessage())));
			if($this->isAjaxRequest())
			{
				$this->controller->sendErrorResponse($this->errorCollection);
			}
			else
			{
				$exceptionHandling = \Bitrix\Main\Config\Configuration::getValue("exception_handling");
				if ($exceptionHandling["debug"])
				{
					throw $e;
				}
			}
		}
		return false;
	}

	/**
	 * Returns whether this is an AJAX (XMLHttpRequest) request.
	 * @return boolean
	 */
	protected function isAjaxRequest()
	{
		return $this->request->isAjaxRequest();
	}

	protected function prepareParams()
	{
		$arParams = &$this->arParams;
		$arResult = &$this->arResult;
		$arParams['MAX_FILE_SIZE'] = isset($arParams['MAX_FILE_SIZE']) ? intval($arParams['MAX_FILE_SIZE']) : 0;
		$arParams['MODULE_ID'] = isset($arParams['MODULE_ID']) && IsModuleInstalled($arParams['MODULE_ID']) ? $arParams['MODULE_ID'] : "main";
		$arParams['FORCE_MD5'] = isset($arParams['FORCE_MD5']) && $arParams['FORCE_MD5'] === true;
		$arParams['CONTROL_ID'] = isset($arParams['CONTROL_ID']) && preg_match('/^[a-zA-Z0-9_\\-]+$/', $arParams['CONTROL_ID']) ? $arParams['CONTROL_ID'] : '';

		$hasControlUniqueId = (
			isset($arParams['CONTROL_UNIQUE_ID'])
			&& preg_match('/^[a-zA-Z0-9_\\-]+$/', $arParams['CONTROL_UNIQUE_ID'])
		);
		$arParams['CONTROL_UNIQUE_ID'] = (
			$hasControlUniqueId
				? $arParams['CONTROL_UNIQUE_ID']
				: $arParams['CONTROL_ID']
		);

// ALLOW_UPLOAD = 'A'll files | 'I'mages | 'F'iles with selected extensions | 'N'one
// ALLOW_UPLOAD_EXT = comma-separated list of allowed file extensions (ALLOW_UPLOAD='F')

		$arParams['ALLOW_UPLOAD'] = $arParams['ALLOW_UPLOAD'] ?? null;
		$arParams['ALLOW_UPLOAD_EXT'] = $arParams['ALLOW_UPLOAD_EXT'] ?? '';
		if ($arParams['ALLOW_UPLOAD'] == 'N' || $arParams['ALLOW_UPLOAD'] === false)
		{
			$arParams['ALLOW_UPLOAD'] = 'N';
		}
		elseif (
			$arParams['ALLOW_UPLOAD'] != 'I' &&
			(
				$arParams['ALLOW_UPLOAD'] != 'F' || $arParams['ALLOW_UPLOAD_EXT'] == ''
			)
		)
		{
			$arParams['ALLOW_UPLOAD'] = 'A';
		}

		if (isset($arParams['INPUT_NAME']) && str_ends_with($arParams['INPUT_NAME'], '[]'))
		{
			$arParams['INPUT_NAME'] = substr($arParams['INPUT_NAME'], 0, -2);
		}
		if (isset($arParams['INPUT_NAME_UNSAVED']) && str_ends_with($arParams['INPUT_NAME_UNSAVED'], '[]'))
		{
			$arParams['INPUT_NAME_UNSAVED'] = mb_substr($arParams['INPUT_NAME_UNSAVED'], 0, -2);
		}
		if (!is_array($arParams['INPUT_VALUE']) && intval($arParams['INPUT_VALUE']) > 0)
		{
			$arParams['INPUT_VALUE'] = [$arParams['INPUT_VALUE']];
		}

		$isEmptyControlId = empty($arParams['CONTROL_ID']);
		$controlId = ($isEmptyControlId ? 'mfi' . $arParams['INPUT_NAME'] :  $arParams['CONTROL_ID']);
		$arResult['CONTROL_ID'] = $controlId;
		$arParams['CONTROL_ID'] = $controlId;

		$isEmptyUniQueControlId = empty($arParams['CONTROL_UNIQUE_ID']);
		$controlUniqueId = $isEmptyUniQueControlId ? $arParams['CONTROL_ID'] : $arParams['CONTROL_UNIQUE_ID'];
		$arResult['CONTROL_UNIQUE_ID'] = $controlUniqueId;
		$arParams['CONTROL_UNIQUE_ID'] = $controlUniqueId;

		$arParams['INPUT_NAME'] = trim($arParams['INPUT_NAME'] ?? '');
		if (!preg_match('/^[a-zA-Z0-9_]+$/', $arParams['INPUT_NAME']))
		{
			throw new \Bitrix\Main\ArgumentException(GetMessage('MFI_ERR_NO_INPUT_NAME'));
		}

		$arParams['MULTIPLE'] = isset($arParams['MULTIPLE']) && $arParams['MULTIPLE'] == 'N' ? 'N' : 'Y';
		$arResult['FILES'] = [];
	}
}