<?php
/**
 * 达达接口请求客户端
 */
$dada = Yii::getAlias("@vendor/dada/");

require_once $dada . 'client/dadaResponse.php';
require_once $dada . 'config/constant.php';

class DadaRequestClient
{
	
	/**
	 * http request timeout;
	 */
	private $httpTimeout = 5;
	
	/**
	 * 配置项
	 */
	private $config;
	
	/**
	 * 接口类
	 */
	private $api;
	
	/**
	 * 构造函数
	 */
	public function __construct($config, $api)
	{
		$this->config = $config;
		$this->api = $api;
	}
	
	/**
	 * 请求调用api
	 * @return bool
	 */
	public function makeRequest()
	{
		$reqParams = $this->bulidRequestParams();
		$resp = $this->getHttpRequestWithPost(json_encode($reqParams));
		return $this->parseResponseData($resp);
	}
	
	/**
	 * 构造请求数据
	 * data:业务参数，json字符串
	 */
	public function bulidRequestParams()
	{
		$config = $this->getConfig();
		$api = $this->getApi();
		
		$requestParams = array();
		$requestParams['app_key'] = $config->getAppKey();
		$requestParams['body'] = $api->getBusinessParams();
		$requestParams['format'] = $config->getFormat();
		$requestParams['v'] = $config->getV();
		$requestParams['source_id'] = $config->getSourceId();
		$requestParams['timestamp'] = time();
		$requestParams['signature'] = $this->_sign($requestParams);
		return $requestParams;
	}
	
	/**
	 * 签名生成signature
	 */
	public function _sign($data)
	{
		
		$config = $this->getConfig();
		
		//1.升序排序
		ksort($data);
		
		//2.字符串拼接
		$args = "";
		foreach ($data as $key => $value) {
			$args .= $key . $value;
		}
		$args = $config->app_secret . $args . $config->app_secret;
		//3.MD5签名,转为大写
		$sign = strtoupper(md5($args));
		
		return $sign;
	}
	
	
	/**
	 * 发送请求,POST
	 * @param $url 指定URL完整路径地址
	 * @param $data 请求的数据
	 */
	public function getHttpRequestWithPost($data)
	{
		
		$config = $this->config;
		$api = $this->api;
		$url = $config->getHost() . $api->getUrl();
		
		// json
		$headers = array(
			'Content-Type: application/json',
		);
		$curl = curl_init($url);
		curl_setopt($curl, CURLOPT_URL, $url);
		curl_setopt($curl, CURLOPT_HEADER, false);
		curl_setopt($curl, CURLOPT_POST, true);
		curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
		curl_setopt($curl, CURLOPT_TIMEOUT, 3);
		curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
		$resp = curl_exec($curl);
		var_dump(curl_error($curl));//如果在执行curl的过程中出现异常，可以打开此开关查看异常内容。
		$info = curl_getinfo($curl);
		curl_close($curl);
		if (isset($info['http_code']) && $info['http_code'] == 200) {
			return $resp;
		}
		return '';
	}
	
	/**
	 * 解析响应数据
	 * @param $arr返回的数据
	 * 响应数据格式：{"status":"success","result":{},"code":0,"msg":"成功"}
	 */
	public function parseResponseData($arr)
	{
		$resp = new DadaResponse();
		if (empty($arr)) {
			$resp->setStatus(DadaConstant::FAIL);
			$resp->setMsg(DadaConstant::FAIL_MSG);
			$resp->setCode(DadaConstant::FAIL_CODE);
		} else {
			$data = json_decode($arr, true);
			$resp->setStatus($data['status']);
			$resp->setMsg($data['msg']);
			$resp->setCode($data['code']);
			$result = isset($data['result']) ? $data['result'] : '';
			$resp->setResult($result);
		}
		return $resp;
	}
	
	public function getConfig()
	{
		return $this->config;
	}
	
	public function getApi()
	{
		return $this->api;
	}
}