package org.wamblee.crawler.impl;

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

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

/*
 * 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.
 */

/**
 * Entry point for the crawler.
 */
public class App {

    private static final String LOG_FILE = "crawler.log";

    public static void main(String[] args) throws Exception {
        String configFileName = args[0];
        String starturl = args[1];
 
        FileOutputStream fos = new FileOutputStream(new File(LOG_FILE));
        PrintStream os = new PrintStream(fos);

        try {
            ConfigurationParser parser = new ConfigurationParser(os);
            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);
            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);
        } finally {
            os.flush();
            os.close();
            System.out.println("Output written on '" + LOG_FILE + "'");
        }
    }

    /**
     * @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) { 
        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) { 
        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);
            }
        }
    }

}