// Gary Yngve
// 11/20/2005

import java.awt.*;
import java.awt.geom.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;

public class GraphUI {
	private JTextArea textBox;
	private JScrollPane scrollPane;

    private DrawingPanel dp;
    private Graphics2D gr;
    private Image img;
    private static final int TEXTHEIGHT = 100;
    private int imgWidth;
    private int imgHeight;

    // loads the campus map and creates the window
    public GraphUI() {
        Toolkit tk = Toolkit.getDefaultToolkit();
        dp = new DrawingPanel();
        img = tk.getImage("smallmap.jpg");
        MediaTracker mt = new MediaTracker(dp.getFrame());
        mt.addImage(img,0);
        try {
            mt.waitForID(0);
        } catch (InterruptedException e) {
            throw new RuntimeException(e.toString());
        }
        imgWidth = img.getWidth(null);
        imgHeight = img.getHeight(null);

        dp.fixSize(imgWidth,imgHeight+TEXTHEIGHT);
        gr = (Graphics2D) dp.getGraphics();
        drawBackground();

        // Added by Kate Deibel to make the text area more useful
        this.textBox = new JTextArea();
       	this.scrollPane =
		    new JScrollPane(this.textBox,
		                    JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
		                    JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);

		this.scrollPane.setBounds(0,imgHeight,imgWidth,TEXTHEIGHT);
		this.dp.getPanel().add(scrollPane);
		this.textBox.setLineWrap(false);
		this.textBox.setEditable(true);
		this.textBox.setMargin(new Insets(1,5,1,5));
		this.textBox.setFont(new Font(null,Font.BOLD,15));
    }

    // sleeps for the number of milliseconds requested --
    // accuracy is low for below 100 ms
    public void sleep(int milliseconds) {
        try { // nappy time
            Thread.sleep(milliseconds);
        } catch (Exception e) { // some silly checked exception
            System.out.println("Dunno what this is for.");
        }
    }

    // draws the background image (erasing whatever was on top)
    public void drawBackground() {
        gr.drawImage(img,0,0,null);
    }

    // draws a vertex given a Color and a radius (min is 1)
    public void drawVertex(Vertex vertex, Color color, int radius) {
        int x = vertex.xcoord;
        int y = vertex.ycoord;
        gr.setColor(color);
        gr.fillOval(x-radius,y-radius,2*radius,2*radius);
    }

    // draws an edge given a Color and thickness (min is 0)
    public void drawEdge(Edge edge, Color color, int thickness) {
        int x1,y1,x2,y2;
        x1 = edge.vertex1.xcoord;
        y1 = edge.vertex1.ycoord;
        x2 = edge.vertex2.xcoord;
        y2 = edge.vertex2.ycoord;
        gr.setColor(color);
        for(int i = -thickness/2; i <= (thickness+1)/2; i++)
            for(int j = -thickness/2; j <= (thickness+1)/2; j++)
                gr.drawLine(x1+i,y1+j,x2+i,y2+j);
    }

    public void drawVertexString(Vertex vertex) {
        gr.setFont(new Font(null,Font.BOLD,10));
        gr.setColor(Color.BLACK);
        gr.drawString(vertex.label,vertex.xcoord+5,vertex.ycoord-10);
    }

    public void drawEdgeString(Edge edge) {
        gr.setFont(new Font(null,Font.BOLD,10));
        gr.setColor(Color.BLACK);
        int x = (edge.vertex1.xcoord+edge.vertex2.xcoord)/2;
        int y = (edge.vertex1.ycoord+edge.vertex2.ycoord)/2;
        gr.drawString(edge.label,x+5,y-10);
    }

    // sets the textbox to empty
    public void blankTextBox() {
		this.textBox.setText("");
    }

    // writes a message on a new line of the textbox
    public void writeMessage(String s) {
		if(this.textBox.getText().length() > 0)
			this.textBox.append("\n");
		this.textBox.append(s);
		this.textBox.setCaretPosition(this.textBox.getDocument().getLength());
    }

    // a sample main to show how the drawing works
    public static void main(String[] args) {
        BuildGraph.buildGraph();
        GraphUI gui = new GraphUI();
        gui.drawBackground();
        for(Iterator i = BuildGraph.vertices.iterator(); i.hasNext(); ) {
                Vertex v = (Vertex)i.next();
                gui.drawVertex(v,Color.RED,4);
        }
        for(Iterator i = BuildGraph.edges.iterator(); i.hasNext(); ) {
                Edge e = (Edge)i.next();
                gui.drawEdge(e,Color.YELLOW,1);
        }
        Edge edge = (Edge)BuildGraph.edges.get(7);
        gui.drawEdge(edge,Color.BLUE,3);
        gui.drawEdge(edge,Color.WHITE,1);
        gui.blankTextBox();
        gui.writeMessage("Yo, yo, wazzuuuup?");
        gui.writeMessage(edge.toString()  + ", weight = " + (int)edge.weight + " : " + edge.vertex1.toString()
              + " <--> " + edge.vertex2.toString());
    }
}