<?php
/**
 * Copyright (C) Alibaba Cloud Computing
 * All rights reserved.
 *
 * 版权所有 （C）阿里云计算有限公司
 */
namespace Aliyun\Common\Resources;

final class ResourceManager
{

    const DEFAULT_OPTION_FILENAME = 'default.options.php';
    const DEFAULT_STRINGS_FILENAME = 'strings.php';

    private static $_instance;
    private $globalDefaultOptions;
    private $defaultOptions = array();
    private $strings = null;

    private function __construct()
    {
        $this->globalDefaultOptions = require __DIR__ . '/' . self::DEFAULT_OPTION_FILENAME;
    }

    /**
     * @return ResourceManager
     */
    public static function getInstance()
    {
        if (!(self::$_instance instanceof self)) {
            self::$_instance = new self();
        }
        return self::$_instance;
    }

    public function getDefaultOption($key, $serviceDirectory = null)
    {
        $defaultOptions = $this->getDefaultOptions($serviceDirectory);
        if (isset($defaultOptions[$key])) {
            return $defaultOptions[$key];
        }
        return null;
    }

    public function getString($string)
    {

        if ($this->strings == null) {
            $this->strings = require __DIR__ . '/' . self::DEFAULT_STRINGS_FILENAME;
        }

        if (!isset($this->strings[$string])) {
            return $string;
        }

        return $this->strings[$string];
    }

    public function getDefaultOptions($serviceDirectory = null)
    {
        $defaultOptions = $this->globalDefaultOptions;
        if ($serviceDirectory !== null) {
            if (array_key_exists($serviceDirectory, $this->defaultOptions)) {
                $defaultOptions = $this->defaultOptions[$serviceDirectory];
            } else {
                $serviceDefaultOptions = require $serviceDirectory . '/Resources/' . self::DEFAULT_OPTION_FILENAME;
                $defaultOptions = array_merge($defaultOptions, $serviceDefaultOptions);
                $this->clientDefaultOptions[$serviceDirectory] = $defaultOptions;
            }
        }
        return $defaultOptions;
    }
}
