<?php
class TopClient
{
	public $appkey;

	public $secretKey;

	//public $gatewayUrl = "http://gw.api.taobao.com/router/rest";
	//tbsandbox
	public $gatewayUrl = "http://gw.api.tbsandbox.com/router/rest";

	public $format = "xml";

	/** 是否打开入参check**/
	public $checkRequest = true;

	protected $signMethod = "md5";

	protected $apiVersion = "2.0";

	protected $sdkVersion = "top-sdk-php-20130412";

	protected function generateSign($params)
	{
		ksort($params);

		$stringToBeSigned = $this->secretKey;
		foreach ($params as $k => $v)
		{
			if("@" != substr($v, 0, 1))
			{
				$stringToBeSigned .= "$k$v";
			}
		}
		unset($k, $v);
		$stringToBeSigned .= $this->secretKey;

		return strtoupper(md5($stringToBeSigned));
	}

	public function curl($url, $postFields = null)
	{
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $url);
		curl_setopt($ch, CURLOPT_FAILONERROR, false);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		//https 请求
		if(strlen($url) > 5 && strtolower(substr($url,0,5)) == "https" ) {
			curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
			curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
		}

		if (is_array($postFields) && 0 < count($postFields))
		{
			$postBodyString = "";
			$postMultipart = false;
			foreach ($postFields as $k => $v)
			{
				if("@" != substr($v, 0, 1))//判断是不是文件上传
				{
					$postBodyString .= "$k=" . urlencode($v) . "&"; 
				}
				else//文件上传用multipart/form-data，否则用www-form-urlencoded
				{
					$postMultipart = true;
				}
			}
			unset($k, $v);
			curl_setopt($ch, CURLOPT_POST, true);
			if ($postMultipart)
			{
				curl_setopt($ch, CURLOPT_POSTFIELDS, $postFields);
			}
			else
			{
				curl_setopt($ch, CURLOPT_POSTFIELDS, substr($postBodyString,0,-1));
			}
		}
		$reponse = curl_exec($ch);
		
		if (curl_errno($ch))
		{
			throw new Exception(curl_error($ch),0);
		}
		else
		{
			$httpStatusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
			if (200 !== $httpStatusCode)
			{
				throw new Exception($reponse,$httpStatusCode);
			}
		}
		curl_close($ch);
		return $reponse;
	}

	protected function logCommunicationError($apiName, $requestUrl, $errorCode, $responseTxt)
	{
		$localIp = isset($_SERVER["SERVER_ADDR"]) ? $_SERVER["SERVER_ADDR"] : "CLI";
		$logData = array(
		date("Y-m-d H:i:s"),
		$apiName,
		$this->appkey,
		$localIp,
		PHP_OS,
		$this->sdkVersion,
		$requestUrl,
		$errorCode,
		str_replace("\n","",$responseTxt)
		);
		K::M('system/logs')->log('topsdk-comm-err-' . $this->appkey . "-" . date("Y-m-d") . ".log",$logData);
	}

	public function execute($request, $session = null)
	{
		if($this->checkRequest) {
			try {
				$request->check();
			} catch (Exception $e) {
				$result['code'] = $e->getCode();
				$result['msg'] = $e->getMessage();
				return $result;
			}
		}
		//组装系统参数
		$sysParams["app_key"] = $this->appkey;
		$sysParams["v"] = $this->apiVersion;
		$sysParams["format"] = $this->format;
		$sysParams["sign_method"] = $this->signMethod;
		$sysParams["method"] = $request->getApiMethodName();
		$sysParams["timestamp"] = date("Y-m-d H:i:s");
		$sysParams["partner_id"] = $this->sdkVersion;
		if (null != $session) {
			$sysParams["session"] = $session;
		}

		//获取业务参数
		$apiParams = $request->getApiParas();
		//签名
		$sysParams["sign"] = $this->generateSign(array_merge($apiParams, $sysParams));

		//系统参数放入GET请求串
		$requestUrl = $this->gatewayUrl . "?";
		foreach ($sysParams as $sysParamKey => $sysParamValue) {
			$requestUrl .= "$sysParamKey=" . urlencode($sysParamValue) . "&";
		}
		$requestUrl = substr($requestUrl, 0, -1);

		//发起HTTP请求
		try	{
			$resp = $this->curl($requestUrl, $apiParams);
		} catch (Exception $e){ 
			$this->logCommunicationError($sysParams["method"],$requestUrl,"HTTP_ERROR_" . $e->getCode(),$e->getMessage());
			$result->code = $e->getCode();
			$result->msg = $e->getMessage();
			return $result;
		}

		//解析TOP返回结果
		$respWellFormed = false;
		if ("json" == $this->format) {
			$ret = json_decode($resp, true);
			if (null !== $ret) {
				$respWellFormed = true;
				foreach ($ret as $propKey => $propValue)	{
					$ret = $propValue;
				}
			}
		} else if("xml" == $this->format) {
			$respObject = @simplexml_load_string($resp);
			if (false !== $respObject) {
				$respWellFormed = true;
			}
		}

		//返回的HTTP文本不是标准JSON或者XML，记下错误日志
		if (false === $respWellFormed) {
			$this->logCommunicationError($sysParams["method"],$requestUrl,"HTTP_RESPONSE_NOT_WELL_FORMED",$resp);
			$result->code = 0;
			$result->msg = "HTTP_RESPONSE_NOT_WELL_FORMED";
			return $result;
		}

		//如果TOP返回了错误码，记录到业务错误日志中
		if (isset($ret['code'])) {
			K::M('system/logs')->Log('topsdk-biz-err-'.date("Y-m-d") .".log",array(date("Y-m-d H:i:s"),$resp));
		}
		return $ret;
	}

	public function exec($paramsArray)
	{
		if (!isset($paramsArray["method"])) {
			trigger_error("No api name passed");
		}
		$inflector = new LtInflector;
		$inflector->conf["separator"] = ".";
		$requestClassName = ucfirst($inflector->camelize(substr($paramsArray["method"], 7))) . "Request";
		if (!class_exists($requestClassName)) {
			trigger_error("No such api: " . $paramsArray["method"]);
		}

		$session = isset($paramsArray["session"]) ? $paramsArray["session"] : null;

		$req = new $requestClassName;
		foreach($paramsArray as $paraKey => $paraValue)	{
			$inflector->conf["separator"] = "_";
			$setterMethodName = $inflector->camelize($paraKey);
			$inflector->conf["separator"] = ".";
			$setterMethodName = "set" . $inflector->camelize($setterMethodName);
			if (method_exists($req, $setterMethodName)){
				$req->$setterMethodName($paraValue);
			}
		}
		return $this->execute($req, $session);
	}
}