/*
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/*
    Copyright 2010 Jamie Walters <jagw@jagw.co.uk>
    based on code by  Joe Robinson <joe@lc8n.com>
*/


import java.net.URL;
import java.net.URLConnection;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;

public class blasearch {

	public static void main(String[] args) throws IOException
	{
		String query = "";

        String version = "v1.5.1";

		/* Build query from query or arguments, depending on whether
		   arguments were given. */
		if (args.length == 0) {
			try {
				BufferedReader br =
					new BufferedReader(new InputStreamReader(System.in));
				query = br.readLine();
			} catch (Exception e) {
				System.err.println("Error:" + e.getMessage());
				System.exit(1);
			}
		} else {
			for (int i = 0; i < args.length; i++) {
				query += args[i];
			}
		}
        if (query.equals("-v") || query.equals("--version")) {
            System.out.println(version);
            System.exit(0);
        }
        if (query.equals("-h") || query.equals("--help")) {
            System.out.println("Usage: !search [-n pageNumber] search query | Examples: !search bla : Returns first 2 search results for 'bla'. | !search bla -n 2 : Searches for the second two results for 'bla'");
            System.exit(0);
        }
        String[] qParts = query.split(" ");
        int offset = 0;
        int start = 0;
        query = "";
        for (int i = 0; i < qParts.length; i++) {
            if (qParts[i].equals("-n") && i < qParts.length-1) {
                try {
                if(Integer.parseInt(qParts[i+1]) > 0) {
                    offset = Integer.parseInt(qParts[i+1])-1;
                    start = (offset / 2)*4;
                    offset = (offset %2)*2;
                    i++;
                } else {
                    start = 0;
                    offset = 0;
                    i++;
                }
                } catch (NumberFormatException e) {
                    start = 0;
                    offset = 0;
                }
            } else {
                query += qParts[i]+"+";
            }
        }
		// Change all ' ' to '+'
		query = query.replaceAll(" ", "+");
		String[] parts = null;
		//URL which provides XML response
		URL url = new URL("http://ajax.googleapis.com/ajax/services/search/web?v=1.0&q="+ query+"&start="+start);

		URLConnection urlc = url.openConnection();

		BufferedReader br = new BufferedReader(new InputStreamReader(urlc.getInputStream()));
		String line;
		String[] lines;
		ArrayList<String> results = new ArrayList<String>();
		ArrayList urls = new ArrayList();
		String result = "";
		String tempString = "";
		//Read every line
		while ((line = br.readLine()) != null)
		{
			// Splits the google output by the commas
			lines = line.split(",");

			for(int i=0; i<lines.length; i++){
				// Get the useful information (the urls!)
				if(lines[i].startsWith("\"unescapedUrl\"")){
					tempString = lines[i];
					// Blat the non-url information
					tempString = tempString.substring(16, tempString.length()-1);
                    String[] searchParts = tempString.split("\\\\u");
                    String searchResult = searchParts[0];
                    if (searchParts.length > 1) {
                    for (int j = 1; j < searchParts.length; j++) {
                        int hexVal = Integer.parseInt(searchParts[j].substring(0,4),16);
                        searchResult += (char)hexVal;
                        searchResult += searchParts[j].substring(4);
                    }
                    }
                    results.add(searchResult);
				}
			}

		}
		// Print results
		if(results.size() > 0){
			for(int i=(offset); i<(offset+2); i++){
				if (i != 0) {
					System.out.print(" | ");
				}
				int count = i + 1;
				System.out.print("Result " + (count+start) + ": " + results.get(i));
			}
		} else {
			System.out.print("Error: no results.\n");
			System.exit(1);
		}
		System.out.print("\n");
	}

}