package com.binrui.shop.pay.alipay.util;

import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.commons.httpclient.NameValuePair;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;
import com.binrui.shop.pay.alipay.config.AlipayConfig;
import com.binrui.shop.pay.alipay.sign.MD5;
import com.binrui.shop.pay.alipay.sign.RSA;
import com.binrui.shop.pay.alipay.util.http.HttpProtocolHandler;
import com.binrui.shop.pay.alipay.util.http.HttpRequest;
import com.binrui.shop.pay.alipay.util.http.HttpResponse;
import com.binrui.shop.pay.alipay.util.http.HttpResultType;

/**
 *类名:AlipaySubmit
 *功能:支付宝各接口请求提交类
 *详细:构造支付宝各接口表单HTML文本,获取远程HTTP数据
 *版本:3.3
 *日期:2012-08-13
 *说明:
 *以下代码只是为了方便商户测试而提供的样例代码,商户可以根据自己网站的需要,按照技术文档编写,并非一定要使用该代码。
 *该代码仅供学习和研究支付宝接口使用,只是提供一个参考。
 */
public class AlipaySubmit {
    
    /**
     * 支付宝提供给商户的服务接入网关URL(新)
     */
    private static final String ALIPAY_GATEWAY_NEW = "https://mapi.alipay.com/gateway.do?";
	
    /**
     * 生成签名结果
     * @param sPara 要签名的数组
     * @return 签名结果字符串
     */
	public static String buildRequestMysign(Map<String, String> sPara) {
    	String prestr = AlipayCore.createLinkString(sPara); //把数组所有元素,按照“参数=参数值”的模式用“&”字符拼接成字符串
        String mysign = "";
        if(AlipayConfig.sign_type.equals("RSA") ){
        	mysign = RSA.sign(prestr, AlipayConfig.private_key, AlipayConfig.input_charset);
        }
        if(AlipayConfig.sign_type.equals("MD5") ) {
        	mysign = MD5.sign(prestr, AlipayConfig.key, AlipayConfig.input_charset);
        }
        return mysign;
    }
	
    /**
     * 生成要请求给支付宝的参数数组
     * @param sParaTemp 请求前的参数数组
     * @return 要请求的参数数组
     */
    private static Map<String, String> buildRequestPara(Map<String, String> sParaTemp) {
        //除去数组中的空值和签名参数
        Map<String, String> sPara = AlipayCore.paraFilter(sParaTemp);
        //生成签名结果
        String mysign = buildRequestMysign(sPara);

        //签名结果与签名方式加入请求提交参数组中
        sPara.put("sign", mysign);
        sPara.put("sign_type", AlipayConfig.sign_type);

        return sPara;
    }

    /**
     * 建立请求,以表单HTML形式构造(默认)
     * @param sParaTemp 请求参数数组
     * @param strMethod 提交方式。两个值可选:post、get
     * @param strButtonName 确认按钮显示文字
     * @return 提交表单HTML文本
     */
    public static String buildRequest(Map<String, String> sParaTemp, String strMethod, String strButtonName) {
        //待请求参数数组
        Map<String, String> sPara = buildRequestPara(sParaTemp);
        List<String> keys = new ArrayList<String>(sPara.keySet());

        StringBuffer sbHtml = new StringBuffer();

        sbHtml.append("<form id=\"alipaysubmit\" name=\"alipaysubmit\" action=\"" + ALIPAY_GATEWAY_NEW
                      + "_input_charset=" + AlipayConfig.input_charset + "\" method=\"" + strMethod
                      + "\">");

        for (int i = 0; i < keys.size(); i++) {
            String name = (String) keys.get(i);
            String value = (String) sPara.get(name);

            sbHtml.append("<input type=\"hidden\" name=\"" + name + "\" value=\"" + value + "\"/>");
        }

        //submit按钮控件请不要含有name属性
        sbHtml.append("<input type=\"submit\" value=\"" + strButtonName + "\" style=\"display:none;\"></form>");
        sbHtml.append("<script>document.forms['alipaysubmit'].submit();</script>");

        return sbHtml.toString();
    }
    
    /**
     * 建立请求,以表单HTML形式构造,带文件上传功能
     * @param sParaTemp 请求参数数组
     * @param strMethod 提交方式。两个值可选:post、get
     * @param strButtonName 确认按钮显示文字
     * @param strParaFileName 文件上传的参数名
     * @return 提交表单HTML文本
     */
    public static String buildRequest(Map<String, String> sParaTemp, String strMethod, String strButtonName, String strParaFileName) {
        //待请求参数数组
        Map<String, String> sPara = buildRequestPara(sParaTemp);
        List<String> keys = new ArrayList<String>(sPara.keySet());

        StringBuffer sbHtml = new StringBuffer();

        sbHtml.append("<form id=\"alipaysubmit\" name=\"alipaysubmit\"  enctype=\"multipart/form-data\" action=\"" + ALIPAY_GATEWAY_NEW
                      + "_input_charset=" + AlipayConfig.input_charset + "\" method=\"" + strMethod
                      + "\">");

        for (int i = 0; i < keys.size(); i++) {
            String name = (String) keys.get(i);
            String value = (String) sPara.get(name);

            sbHtml.append("<input type=\"hidden\" name=\"" + name + "\" value=\"" + value + "\"/>");
        }
        
        sbHtml.append("<input type=\"file\" name=\"" + strParaFileName + "\" />");

        //submit按钮控件请不要含有name属性
        sbHtml.append("<input type=\"submit\" value=\"" + strButtonName + "\" style=\"display:none;\"></form>");

        return sbHtml.toString();
    }
    
    /**
     * 建立请求,以模拟远程HTTP的POST请求方式构造并获取支付宝的处理结果
     * 如果接口中没有上传文件参数,那么strParaFileName与strFilePath设置为空值
     * 如:buildRequest("", "",sParaTemp)
     * @param strParaFileName 文件类型的参数名
     * @param strFilePath 文件路径
     * @param sParaTemp 请求参数数组
     * @return 支付宝处理结果
     * @throws Exception
     */
    public static String buildRequest(String strParaFileName, String strFilePath,Map<String, String> sParaTemp) throws Exception {
        //待请求参数数组
        Map<String, String> sPara = buildRequestPara(sParaTemp);

        HttpProtocolHandler httpProtocolHandler = HttpProtocolHandler.getInstance();

        HttpRequest request = new HttpRequest(HttpResultType.BYTES);
        //设置编码集
        request.setCharset(AlipayConfig.input_charset);

        request.setParameters(generatNameValuePair(sPara));
        request.setUrl(ALIPAY_GATEWAY_NEW+"_input_charset="+AlipayConfig.input_charset);

        HttpResponse response = httpProtocolHandler.execute(request,strParaFileName,strFilePath);
        if (response == null) {
            return null;
        }
        
        String strResult = response.getStringResult();

        return strResult;
    }

    /**
     * MAP类型数组转换成NameValuePair类型
     * @param properties  MAP类型数组
     * @return NameValuePair类型数组
     */
    private static NameValuePair[] generatNameValuePair(Map<String, String> properties) {
        NameValuePair[] nameValuePair = new NameValuePair[properties.size()];
        int i = 0;
        for (Map.Entry<String, String> entry : properties.entrySet()) {
            nameValuePair[i++] = new NameValuePair(entry.getKey(), entry.getValue());
        }

        return nameValuePair;
    }
    
    /**
     * 用于防钓鱼,调用接口query_timestamp来获取时间戳的处理函数
     * 注意:远程解析XML出错,与服务器是否支持SSL等配置有关
     * @return 时间戳字符串
     * @throws IOException
     * @throws DocumentException
     * @throws MalformedURLException
     */
	@SuppressWarnings("unchecked")
	public static String query_timestamp() throws MalformedURLException,
                                                        DocumentException, IOException {
        //构造访问query_timestamp接口的URL串
        String strUrl = ALIPAY_GATEWAY_NEW + "service=query_timestamp&partner=" + AlipayConfig.partner + "&_input_charset" +AlipayConfig.input_charset;
        StringBuffer result = new StringBuffer();
        SAXReader reader = new SAXReader();
        Document doc = reader.read(new URL(strUrl).openStream());
        List<Node> nodeList = doc.selectNodes("//alipay/*");
        for (Node node : nodeList) {
            // 截取部分不需要解析的信息
            if (node.getName().equals("is_success") && node.getText().equals("T")) {
                // 判断是否有成功标示
                List<Node> nodeList1 = doc.selectNodes("//response/timestamp/*");
                for (Node node1 : nodeList1) {
                    result.append(node1.getText());
                }
            }
        }
        return result.toString();
    }
}