import objectdraw.*;
import java.awt.*;

public class Frogger extends WindowController {

	// Constants defining the sizes of the background components.
	private static final double HIGHWAY_LENGTH = 700;
	private static final double LANE_WIDTH = 100;
	private static final int NUM_LANES = 4;
	private static final double HIGHWAY_WIDTH = LANE_WIDTH * NUM_LANES;
	private static final double LINE_WIDTH = LANE_WIDTH / 10;
	
	// Constants defining the locations of the background components
	private static final double HIGHWAY_LEFT = 50;
	private static final double HIGHWAY_RIGHT = HIGHWAY_LEFT + HIGHWAY_LENGTH;
	private static final double HIGHWAY_TOP = 100;
	private static final double HIGHWAY_BOTTOM = HIGHWAY_TOP + HIGHWAY_WIDTH;
	
	// Constants describing the lines on the highway
	private static final double LINE_SPACING = LINE_WIDTH / 2;
	private static final double DASH_LENGTH = LANE_WIDTH / 3;
	private static final double DASH_SPACING = DASH_LENGTH / 2;

	// This method current just draws the highway.  You will have to add instructions to create
	// the frog and the Lane ActiveObjects.
	public void begin() {
		// Draw the background
		FilledRect highway = new FilledRect (HIGHWAY_LEFT, HIGHWAY_TOP, HIGHWAY_LENGTH, HIGHWAY_WIDTH, canvas);
		
		// Draw the lane dividers
		int whichLine = 1;
		while (whichLine < NUM_LANES) {
		  if (whichLine == NUM_LANES / 2) {
			  // The middle line is a no passing line
			  drawNoPassingLine (HIGHWAY_TOP + (whichLine * LANE_WIDTH) - 
			                                            (LINE_SPACING / 2 + LINE_WIDTH));
		  } else {
		      drawPassingLine (HIGHWAY_TOP + (whichLine * LANE_WIDTH) - (LINE_WIDTH / 2));
		  } // end if
		  whichLine = whichLine + 1;
		} // end while
		
		// ADD YOUR CODE TO CREATE THE FROG AND THE LANES
				
	} // end begin
	
	// Draws a pair of solid yellow lines to represent a no passing divider between lanes
	// Parameter:  y - the top of the top line
	// 
	// YOU SHOULD NOT NEED TO MODIFY THIS METHOD
	//
    public void drawNoPassingLine (double y) {
   		// Draw the solid dividing lines
		FilledRect topLine = new FilledRect (HIGHWAY_LEFT, y, HIGHWAY_LENGTH, LINE_WIDTH, canvas);
		topLine.setColor (Color.yellow);

		FilledRect bottomLine = new FilledRect (HIGHWAY_LEFT, y + LINE_WIDTH + LINE_SPACING, 
												HIGHWAY_LENGTH, LINE_WIDTH, canvas);
		bottomLine.setColor (Color.yellow);
   } // end drawNoPassingLine

	// Draws a dashed white line to represent a passing line dividing two lanes of traffic
	// Parameters:  y - the top of the line.
	// 
	// YOU SHOULD NOT NEED TO MODIFY THIS METHOD
	//
	public void drawPassingLine (double y) {
	   double x = HIGHWAY_LEFT;
	   FilledRect dash;
	   
	   while (x < HIGHWAY_RIGHT) {
	   		// Draw the next dash.
	   		dash = new FilledRect (x, y, DASH_LENGTH, LINE_WIDTH, canvas);
	   		dash.setColor (Color.white);
	   		x = x + DASH_LENGTH + DASH_SPACING;
	   } // end while
	   
	} // end drawPassingLine
	
	// Note: Use onMousePress rather than onMouseClick to decide when to move the frog
	public void onMousePress(Location point) {
	
	} // end onMousePress
		   
} // end Frogger class