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package org.apache.geronimo.samples.jaxws.rest;

import java.io.*;
import javax.servlet.ServletException;
import javax.servlet.http.*;
import javax.xml.parsers.*;
import javax.xml.xpath.*;
import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.methods.*;
import org.w3c.dom.*;
import org.xml.sax.SAXException;

public class ConverterHandler extends javax.servlet.http.HttpServlet implements
		javax.servlet.Servlet {
	static final long serialVersionUID = 1L;

	public ConverterHandler() {
		super();
	}

	protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {

		PrintWriter out = response.getWriter();
		String query = request.getParameter("query");
		if (query != null && query.length() > 0) {
			out.println("<center>");
			out.println("<br><br><br>");
			String requestquery = "http://localhost:8080/jaxws-rest-converter/converter?amount="
					+ query;
			HttpClient client = new HttpClient();
			GetMethod method = new GetMethod(requestquery);
			int statusCode = client.executeMethod(method);
			if (statusCode != HttpStatus.SC_OK) {
				System.err.println("Method failed: " + method.getStatusLine());
			}
			InputStream rstream = null;
			rstream = method.getResponseBodyAsStream();
			Document queryresponse = null;
			try {
				queryresponse = DocumentBuilderFactory.newInstance()
						.newDocumentBuilder().parse(rstream);
			} catch (SAXException e) {
				e.printStackTrace();
			} catch (ParserConfigurationException e) {
				e.printStackTrace();
			}

			XPathFactory factory = XPathFactory.newInstance();
			XPath xPath = factory.newXPath();
			NodeList nodes = null;
			try {
				nodes = (NodeList) xPath.evaluate("/return", queryresponse,
						XPathConstants.NODESET);
			} catch (XPathExpressionException e) {
				e.printStackTrace();
			}
			int nodeCount = nodes.getLength();
			for (int i = 0; i < nodeCount; i++) {
				// Get each xpath expression as a string
				String rupees = null;
				String euros = null;
				try {
					rupees = (String) xPath.evaluate("dollarToRupeesResponse",
							nodes.item(i), XPathConstants.STRING);
					euros = (String) xPath.evaluate("rupeesToEurosResponse",
							nodes.item(i), XPathConstants.STRING);

				} catch (XPathExpressionException e) {
					e.printStackTrace();
				}
				out.println(query + " Dollars equals to " + rupees + " Rupees");
				out.println("<br>");
				out.println(rupees + " Rupees equals to " + euros + " Euros");
			}
			out.println("</center>");
		}

	}

	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		// Has to be Completed
	}
}