package org.wamblee.crawler.impl;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.NameValuePair;
import org.dom4j.Element;
import org.wamblee.crawler.Action;
import org.wamblee.crawler.Configuration;
import org.wamblee.crawler.Crawler;
import org.wamblee.crawler.Page;
import org.wamblee.crawler.PageException;
import org.wamblee.xml.XslTransformer;

/*
 * Copyright 2005 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.
 */

/**
 * Test application which uses the crawler. 
 *
 * @author Erik Brakkee
 */
public final class App {

    /**
     * Disabled constructor.
     * 
     */
    private App() {
        // Empty
    }
    
    /**
     * Runs a test program.
     * 
     * @param aArgs
     *            Arguments. First argument is the crawler config file name and
     *            second argument is the start url.
     * @throws Exception
     *             In case of problems.
     */
    public static void main(String[] aArgs) throws Exception {
        String configFileName = aArgs[0];
        String starturl = aArgs[1];

        ConfigurationParser parser = new ConfigurationParser(new XslTransformer());
        InputStream configFile = new FileInputStream(new File(configFileName));
        Configuration config = parser.parse(configFile);

        HttpClient client = new HttpClient();
        // client.getHostConfiguration().setProxy("localhost", 3128);

        Crawler crawler = new CrawlerImpl(client, config);

        System.out.println("Retrieving: " + starturl);
        Page page = crawler.getPage(starturl, new NameValuePair[0]);
        showPage(page);
        page = page.getAction("channels-favorites").execute();
        recordInterestingShows(page);
        showPage(page);
        page = page.getAction("Nederland 1").execute();
        showPage(page);
        page = page.getAction("right-now").execute();
        showPage(page);
        page = page.getAction("Het elfde uur").execute();
        showPage(page);
    }

    /**
     * @param starturl
     * @param crawler
     */
    private static void showPage(Page aPage) {
        Action[] links = aPage.getActions();
        for (Action link : links) {
            System.out.println("Link found '" + link.getName() + "'");
        }
        Element element = aPage.getContent();
        System.out.println("Retrieved content: " + element.asXML());
    }

    private static void recordInterestingShows(Page page) throws PageException {
        Action[] channels = page.getActions();
        for (Action channel : channels) {
            examineChannel(channel.getName(), channel.execute().getAction(
                    "right-now").execute());
        }
    }

    private static void examineChannel(String aChannel, Page aPage)
            throws PageException {
        Action[] programs = aPage.getActions();
        for (Action program : programs) {
            System.out.println(aChannel + " - " + program.getName());
            if (program.getName().toLowerCase().matches(".*babe.*")) {
                Page programPage = program.execute();
                Action record = programPage.getAction("record");
                System.out.println("Recording possible: " + record != null);
            }
        }
    }

}