package chess;

import java.util.StringTokenizer;
import java.util.Vector;
/*
 * EntryLine.java
 *
 * Created on February 10, 2007, 5:07 PM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

/**
 *
 * @author Stanislav Hromek
 */
public class EntryLine {
    
    /** Creates a new instance of EntryLine */
    public EntryLine() {
    }
    
    protected static Move processLine(String line) {
        // divide line by space (can be changed in future)
//        Vector piecesOfLine = new Vector();
//        StringTokenizer st = new StringTokenizer(line, " .", true);
//        while (st.hasMoreTokens()) {
//            String token = st.nextToken();
//            piecesOfLine.add(token);
//        }
        String[] piecesOfLine = line.split(" ");
        // make from pieses parts of move (can be also two or st. different in future)
        for (int i = 0; i < piecesOfLine.length; i++) {
            System.out.println("piecesOfLine = "+piecesOfLine[i]);
        }
        
        if(piecesOfLine.length == 3) {
            String[] first = piecesOfLine[0].split("\\.");
//            for (int i = 0; i < first.length; i++) {
//                System.out.println("first["+i+"]="+first[i]);
//            }
            if(first.length > 1){
                // can this ever happen ?, todo
                Game.errorMessage = "Problem by parsing move number: " + piecesOfLine[0];
                return null;
            } else{
                // parse first string to number
                // todo, validate number of the move
                int moveNumber = (int)Float.parseFloat(piecesOfLine[0]);
                // todo, validate white move (in the sence of correctness of wtiring, not possibility of the move)
                String whiteMove = piecesOfLine[1];
                // todo, tha same for black
                String blackMove = piecesOfLine[2];
                // return move
                return new Move(moveNumber, whiteMove, blackMove);
            }
        } else if(piecesOfLine.length == 2) {
            // parse first string to number
            // todo, validate number of the move
            int moveNumber;
            String[] first = piecesOfLine[0].split("\\.");  // \\. as we want dot and not regexp
            for (int i = 0; i < first.length; i++) {
                System.out.println("first = " + first[i]);
            }
            if(first.length > 1){
                try {
                    moveNumber = (int)Float.parseFloat(first[0]);
                } catch (NumberFormatException e) {
                    Game.errorMessage = "Problem by parsing move number: " + first[0];
                    return null;
                }
                String whiteMove = first[1];
                
                String blackMove = piecesOfLine[1];
                return new Move(moveNumber, whiteMove, blackMove);
            } else{
                try {
                    moveNumber = (int)Float.parseFloat(piecesOfLine[0]);
                } catch (NumberFormatException e) {
                    Game.errorMessage = "Problem by parsing move number: " + piecesOfLine[0];
                    return null;
                }
                
                // todo, validate white move (in the sence of correctness of wtiring, not possibility of the move)
                String whiteMove = piecesOfLine[1];
                // todo, tha same for black
//            String blackMove = piecesOfLine[2];
                // return move
                return new Move(moveNumber, whiteMove, null);
            }
        } else {
            Game.errorMessage = "Now only three strings divided by space are allowed. "+line;
            // do we have an error ?
            return null;
        }
        
    }
    
}