import java.awt.Color;
import java.awt.Font;
import java.io.*;

public class Labyrinth {

	public static ResultLabyrinth readLabyrinth(String filename) {
		FileInputStream fin = null;
		InputStreamReader iin = null;
		LineNumberReader lnr = null;
		ResultLabyrinth result = new ResultLabyrinth();
		
		try {

			if (Basis.FileExists(filename)) {
				fin = new FileInputStream(filename);
				iin = new InputStreamReader(fin);
				lnr = new LineNumberReader(iin); // oder BufferedReader br = new BufferedReader(ir);
				// x / y
				String line = lnr.readLine();
				Integer[] numbers = Basis.convert2Numbers(line);
				if (numbers == null) {
					Basis.Message("Fehlerhafte Anzahl des Labyrinths", "Fehler");
					return null;
				}
				int maxy = numbers[0];
				int maxx = numbers[1];
				result.maxy = maxy;
				result.maxx = maxx;
				
				result.buttons = new MyJButton[maxy][maxx];
				for (int i = 0; i < maxy; i++) {
					for (int j = 0; j < maxx; j++) {
						MyJButton bn = new MyJButton(Integer.toString(i) + "/" + Integer.toString(j));
						bn.setFont(new Font("Arial", Font.BOLD, 16));
						bn.setBackground(Color.WHITE);
						bn.setStatus(Status.FREI);
						result.buttons[i][j] = bn;
					}
				}				
				
				// ----------------------------------------------
				line = lnr.readLine();
				numbers = Basis.convert2Numbers(line);
				if (numbers == null) {
					Basis.Message("Fehlerhafte Anzahl der Startzelle", "Fehler");
					return null;
				}
				int starty = numbers[0];
				int startx = numbers[1];
				result.buttons[starty][startx].setStatus(Status.START);
				result.buttons[starty][starty].setBackground( new Color(255,127,127));
				result.startx = startx;
				result.starty = starty;
				
				// ----------------------------------------------
				line = lnr.readLine();
				numbers = Basis.convert2Numbers(line);
				if (numbers == null) {
					Basis.Message("Fehlerhafte Anzahl der Zielzelle", "Fehler");
					return null;
				}
				int ziely = numbers[0];
				int zielx = numbers[1];
				result.buttons[ziely][zielx].setStatus(Status.ZIEL);
				result.buttons[ziely][zielx].setBackground( Color.GREEN );
				result.zielx = zielx;
				result.ziely = ziely;

				
				while (true) {
					line = lnr.readLine();
					numbers = Basis.convert2Numbers(line);
					if (numbers == null) {
						Basis.Message("Fehlerhafte Anzahl der Zielzelle", "Fehler");
						return null;
					}
					if (numbers[0]>=0 && numbers[1]>=0) {
						result.buttons[numbers[0]][numbers[1]].setStatus(Status.WAND);
						result.buttons[numbers[0]][numbers[1]].setBackground( new Color(200,200,200));
					}
					else {
						break;
					}
					
				} // while 
				
				

			} else {
				Basis.Message("Die Datei existiert nicht\n" + filename, "Hinweis");
			}
		} catch (FileNotFoundException e1) {
			System.err.println("Datei war nicht vorhanden!");
		} catch (IOException ee) {
			System.err.println("IOException: " + ee);
		} finally {
			try {
				if (lnr != null)
					lnr.close();
				if (iin != null)
					iin.close();
				if (fin != null)
					fin.close();
			} catch (IOException ee) {
				System.err.println("IOException: " + ee);
			}
		}

		return result;
	}

}