/*
 * Copyright 2006 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.wamblee.crawler.kiss.servlet;

import java.io.IOException;
import java.io.OutputStream;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.wamblee.crawler.kiss.main.Report;
import org.wamblee.crawler.kiss.notification.Notifier;
import org.wamblee.crawler.kiss.scheduling.CrawlerScheduler;
import org.wamblee.crawler.kiss.scheduling.CrawlerStatus;
import org.wamblee.general.BeanKernel;

/**
 * 
 */
public class CrawlerServlet extends HttpServlet {

    /*
     * (non-Javadoc)
     * 
     * @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest,
     *      javax.servlet.http.HttpServletResponse)
     */
    @Override
    protected void doPost(HttpServletRequest aRequest,
            HttpServletResponse aResponse) throws ServletException, IOException {

        CrawlerScheduler scheduler = BeanKernel.getBeanFactory().find(
                CrawlerScheduler.class);
        CrawlerStatus status = BeanKernel.getBeanFactory().find(
                CrawlerStatus.class);

        try {
            if (aRequest.getParameter("details") != null) {
                Report report = status.getLastReport();
                if (report != null) {
                    Notifier notifier = BeanKernel.getBeanFactory().find(Notifier.class);
                    aResponse.setContentType("text/html");
                    OutputStream os = aResponse.getOutputStream();
                    os.write(notifier.asHtml(report.asXml()).getBytes());
                    return;
                }
            }
            if (aRequest.getParameter("runnow") != null) {
                status.setMustExecute(true);
                scheduler.scheduleNow();
                aResponse.sendRedirect("");
                return;
            }
            aRequest.setAttribute("running", scheduler.isCrawlerRunning());
            aRequest.setAttribute("lastExecuted", status.getLastExecuted());
            aRequest.setAttribute("lastResult", status.getLastResult());
            aRequest.setAttribute("lastException", status.getLastException());
            aRequest.setAttribute("lastReport", status.getLastReport());
            String msg = "";
            Throwable e = status.getLastException();
            while (e != null) {
                msg = msg + e.getClass().getName() + ": " + e.getMessage()
                        + "<br/>";
                e = e.getCause();
            }
            aRequest.setAttribute("lastMessage", msg);
        } catch (Exception e) {
            throw new ServletException("Error getting status", e);
        }
        aRequest.getRequestDispatcher("WEB-INF/overview.jsp").forward(aRequest,
                aResponse);
    }

    /*
     * (non-Javadoc)
     * 
     * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest,
     *      javax.servlet.http.HttpServletResponse)
     */
    @Override
    protected void doGet(HttpServletRequest aRequest,
            HttpServletResponse aResponse) throws ServletException, IOException {
        doPost(aRequest, aResponse);
    }
}