<?php

class TopClient {
    public $appkey;
    public $secretKey;
    public $gatewayUrl = "http://gw.api.taobao.com/router/rest";
    public $format     = "xml";
    public $connectTimeout;
    public $readTimeout;
    /** 是否打开入参check**/
    public    $checkRequest = true;
    protected $signMethod   = "md5";
    protected $apiVersion   = "2.0";
    protected $sdkVersion   = "top-sdk-php-20151012";

    public function __construct($appkey = "", $secretKey = "") {
        $this->appkey = $appkey;
        $this->secretKey = $secretKey;
    }

    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($ch, CURLOPT_RETURNTRANSFER, true);
        if ($this->readTimeout) {
            curl_setopt($ch, CURLOPT_TIMEOUT, $this->readTimeout);
        }
        if ($this->connectTimeout) {
            curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $this->connectTimeout);
        }
        curl_setopt($ch, CURLOPT_USERAGENT, "top-sdk-php");
        //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;
                    if (class_exists('\CURLFile')) {
                        $postFields[$k] = new \CURLFile(substr($v, 1));
                    }
                }
            }
            unset($k, $v);
            curl_setopt($ch, CURLOPT_POST, true);
            if ($postMultipart) {
                if (class_exists('\CURLFile')) {
                    curl_setopt($ch, CURLOPT_SAFE_UPLOAD, true);
                } else {
                    if (defined('CURLOPT_SAFE_UPLOAD')) {
                        curl_setopt($ch, CURLOPT_SAFE_UPLOAD, false);
                    }
                }
                curl_setopt($ch, CURLOPT_POSTFIELDS, $postFields);
            } else {
                $header = array("content-type: application/x-www-form-urlencoded; charset=UTF-8");
                curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
                curl_setopt($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";
        $logger = new TopLogger;
        $logger->conf["log_file"] = rtrim(TOP_SDK_WORK_DIR, '\\/').'/'."logs/top_comm_err_".$this->appkey."_".date(
                "Y-m-d"
            ).".log";
        $logger->conf["separator"] = "^_^";
        $logData = array(
            date("Y-m-d H:i:s"),
            $apiName,
            $this->appkey,
            $localIp,
            PHP_OS,
            $this->sdkVersion,
            $requestUrl,
            $errorCode,
            str_replace("\n", "", $responseTxt)
        );
        $logger->log($logData);
    }

    public function execute($request, $session = null, $bestUrl = null) {
        $result = new ResultSet();
        if ($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");
        if (null != $session) {
            $sysParams["session"] = $session;
        }
        //获取业务参数
        $apiParams = $request->getApiParas();
        //系统参数放入GET请求串
        if ($bestUrl) {
            $requestUrl = $bestUrl."?";
            $sysParams["partner_id"] = $this->getClusterTag();
        } else {
            $requestUrl = $this->gatewayUrl."?";
            $sysParams["partner_id"] = $this->sdkVersion;
        }
        //签名
        $sysParams["sign"] = $this->generateSign(array_merge($apiParams, $sysParams));
        foreach ($sysParams as $sysParamKey => $sysParamValue) {
            // if(strcmp($sysParamKey,"timestamp") != 0)
            $requestUrl .= "$sysParamKey=".urlencode($sysParamValue)."&";
        }
        // $requestUrl .= "timestamp=" . urlencode($sysParams["timestamp"]) . "&";
        $requestUrl = substr($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) {
            $respObject = json_decode($resp);
            if (null !== $respObject) {
                $respWellFormed = true;
                foreach ($respObject as $propKey => $propValue) {
                    $respObject = $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 $result;
        }
        //如果TOP返回了错误码，记录到业务错误日志中
        if (isset($respObject->code)) {
            $logger = new TopLogger;
            $logger->conf["log_file"] = rtrim(TOP_SDK_WORK_DIR, '\\/').'/'."logs/top_biz_err_".$this->appkey."_".date(
                    "Y-m-d"
                ).".log";
            $logger->log(
                array(
                    date("Y-m-d H:i:s"),
                    $resp
                )
            );
        }
        return $respObject;
    }

    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);
    }

    private function getClusterTag() {
        return substr($this->sdkVersion, 0, 11)."-cluster".substr($this->sdkVersion, 11);
    }
}