<?php
namespace common\helpers;

use Yii;
use yii\httpclient\Client;
use yii\redis\Connection;
use backend\models\Config;
class RateHelper
{
    const RATE_URL = 'http://web.juhe.cn:8080/finance/exchange/rmbquot?key=05806e7b15ebbab91c1babceed3b468a';
    const RATE_CACHE_KEY = 'usdRate';

    /**
     * 获取入金 出金汇率
     * @param bool $refresh
     * @return mixed
     */
    public static function getRate($refresh = false)
    {
        
        $cache  = \Yii::$app->redis;
        $lastCode = $cache->get('exchangeRate');
        $time = $cache->get('exchangeRate_time');
        $exchangeRate = new RateHelper();
        if (!empty($lastCode) && ($exchangeRate->microtime_float() - $time <= 86400000)) {
                // 从缓存中获取我们的汇率
                $usdRate['exchangeRate'] = $lastCode;

        }else{

            // 从新获取汇率    
            $exchangeRate = new RateHelper();
            $exchangeNum = $exchangeRate->exchangeRate();
            if(isset($exchangeNum)){
                $usdRate['exchangeRate'] =  round(6.84/$exchangeNum,2);
                $config = Config::findOne(1);
                $config['exchangerate'] = $usdRate['exchangeRate']; 
                $config->setAttributes($config, false);
    
                //更新数据库中的数据,并且更新数据库数据的 缓存
                if ($config->save()) {
                    $cache = \Yii::$app->cache;
                    $cache->set('config', Config::findOne(1));
                }
    
                //更新redis
                $cache  = \Yii::$app->redis; 
                $cache->set('exchangeRate', round(6.84/$exchangeNum,2));
                $cache->set('exchangeRate_time', $exchangeRate->microtime_float());
            }else{

                $config = Config::findOne(1);
                $usdRate['exchangeRate'] =  $config['exchangerate'];

            }
           
        }
		$usdRate['sellRate'] = 6.84;
        $usdRate['buyRate'] = 6.54;
        
		/*						
        $usdRate = Yii::$app->getCache()->get(self::RATE_CACHE_KEY);
        if ($usdRate == false || $refresh == true) {
            $client = new Client();
            $success = false;
            for ($i = 0; $i < 2; $i++) {
                $response = $client->get(self::RATE_URL, [], ['Referer' => 'web.juhe.cn'])->send();
                if ($response->getIsOk()) {
                    $json = $response->getContent();
                    $jsonArr = @json_decode($json, true);
                    if ($jsonArr['error_code'] == 0 && !empty($jsonArr['result'][0])) {
                        foreach ((array)$jsonArr['result'][0] as $dataKey => $dataRow) {
                            if ($dataRow['name'] == '美元') {
//                                $usdRate['buyRate'] = number_format(round($dataRow['fBuyPri'] / 100, 3), 3, '.', '');
                                $usdRate['sellRate'] = number_format(round($dataRow['fSellPri'] / 100, 3), 3, '.', '');
                                $usdRate['buyRate'] = number_format($usdRate['sellRate'] - 0.11, 3, '.', ''); // 出金汇率=入金汇率-0.11
                                Yii::$app->getCache()->set(self::RATE_CACHE_KEY, $usdRate, 3600);
                                $success = true;
                                break;
                            }
                        }
                    }
                }
                if ($success == true) {
                    break;
                }
                usleep(50000); // sleep 50ms
            }
        }
		*/
        return $usdRate;
    }

    //获取港币和人民币之间的汇率
    public  function exchangeRate(){

        $WebServiceURL = "http://www.unionpayintl.com/cardholderServ/serviceCenter/rate/search";

        $headers = array("Content-Type: application/x-www-form-urlencoded; charset=utf-8");
        $day = date("w");
        $today = array('2','3','4','5','6');
        if(in_array($day,$today)){
            $time = date("Y-m-d",strtotime("-1 day"));
        }else if($day==1){
            $time = date("Y-m-d",strtotime("-3 day"));
        }else if($day==0){
            $time = date("Y-m-d",strtotime("-2 day"));
        }
		$parameters = array('curDate' => $time,'baseCurrency'=>'CNY','transactionCurrency'=>'HKD');
		$temp = $parameters;
		foreach ($temp as $key => $value) {
			if ($value == NULL) {
				unset($temp[$key]);
			}
		}
		$postData = $this->buildParametersString($temp, '&');
        
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $WebServiceURL);
		curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
		curl_setopt($ch, CURLOPT_POST, 1);
		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
		curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,0);
		curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
		$responseText = curl_exec($ch);
        $result = json_decode($responseText,true);
        return $result['exchangeRate'];
    }
    
    function buildParametersString($parameters, $jointer='') {
		ksort($parameters);
		$temp = array();
		foreach ($parameters as $key => $value) {
			array_push($temp, $key.'='.$value);
		}
		return implode($jointer, $temp);   
    }
    
    /**
     * 获取毫秒级时间戳
     */
    public  function microtime_float()
    {
        list($t1, $t2) = explode(' ', microtime());
        return number_format(((floatval($t1) + floatval($t2)) * 1000), 0, '', '');
    }


    /**
     * @return null|Connection
     */
    protected static function getRedis()
    {
        return Yii::$app->get('redis');
    }
}