package NET.worlds.console;

import java.awt.Canvas;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.util.StringTokenizer;

public class MultiLineLabel extends Canvas {
   private static final long serialVersionUID = -3840151921412552795L;
   public static final int LEFT = 0;
   public static final int CENTER = 1;
   public static final int RIGHT = 2;
   protected String[] lines;
   protected int num_lines;
   protected int margin_width;
   protected int margin_height;
   protected int line_height;
   protected int line_ascent;
   protected int[] line_widths;
   protected int max_width;
   protected int alignment = 0;

   protected void newLabel(String label) {
      StringTokenizer t = new StringTokenizer(label, "\n");
      this.num_lines = t.countTokens();
      this.lines = new String[this.num_lines];
      this.line_widths = new int[this.num_lines];

      for (int i = 0; i < this.num_lines; i++) {
         this.lines[i] = t.nextToken();
      }
   }

   protected void measure() {
      FontMetrics fm = this.getFontMetrics(this.getFont());
      if (fm != null) {
         this.line_height = fm.getHeight();
         this.line_ascent = fm.getAscent();
         this.max_width = 0;

         for (int i = 0; i < this.num_lines; i++) {
            this.line_widths[i] = fm.stringWidth(this.lines[i]);
            if (this.line_widths[i] > this.max_width) {
               this.max_width = this.line_widths[i];
            }
         }
      }
   }

   public MultiLineLabel(String label, int margin_width, int margin_height, int alignment) {
      this.newLabel(label);
      this.margin_width = margin_width;
      this.margin_height = margin_height;
      this.alignment = alignment;
   }

   public MultiLineLabel(String label, int margin_width, int margin_height) {
      this(label, margin_width, margin_height, 0);
   }

   public MultiLineLabel(String label, int alignment) {
      this(label, 10, 10, alignment);
   }

   public MultiLineLabel(String label) {
      this(label, 10, 10, 0);
   }

   public MultiLineLabel() {
      this("", 10, 10, 0);
   }

   public void setLabel(String label) {
      this.newLabel(label);
      this.measure();
      this.repaint();
   }

   public String getLabel() {
      if (this.lines.length == 0) {
         return "";
      } else {
         String s = this.lines[0];

         for (int i = 1; i < this.lines.length; i++) {
            s = s + "\n" + this.lines[i];
         }

         return s;
      }
   }

   @Override
   public void setFont(Font f) {
      super.setFont(f);
      this.measure();
      this.repaint();
   }

   @Override
   public void setForeground(Color c) {
      super.setForeground(c);
      this.repaint();
   }

   public void setAlignment(int a) {
      this.alignment = a;
      this.repaint();
   }

   public void setMarginWidth(int mw) {
      this.margin_width = mw;
      this.repaint();
   }

   public void setMarginHeight(int mh) {
      this.margin_height = mh;
      this.repaint();
   }

   public int getAlignment() {
      return this.alignment;
   }

   public int getMarginWidth() {
      return this.margin_width;
   }

   public int getMarginHeight() {
      return this.margin_height;
   }

   public int getLines() {
      return this.num_lines;
   }

   @Override
   public void addNotify() {
      super.addNotify();
      this.measure();
   }

   @Override
   public Dimension preferredSize() {
      return new Dimension(this.max_width + 2 * this.margin_width, this.num_lines * this.line_height + 2 * this.margin_height);
   }

   @Override
   public Dimension minimumSize() {
      return this.preferredSize();
   }

   @Override
   public void paint(Graphics g) {
      Dimension d = this.getSize();
      int y = this.line_ascent + (d.height - this.num_lines * this.line_height) / 2;

      for (int i = 0; i < this.num_lines; y += this.line_height) {
         int x;
         switch (this.alignment) {
            case 0:
               x = this.margin_width;
               break;
            case 1:
            default:
               x = (d.width - this.line_widths[i]) / 2;
               break;
            case 2:
               x = d.width - this.margin_width - this.line_widths[i];
         }

         g.drawString(this.lines[i], x, y);
         i++;
      }
   }
}