/***********************************************
 *  CS2510 Fall 2011 
 *  Lecture #7.2
 *  Java World: Rockets
 ***********************************************/

import tester.*;
import image.*;
import world.*;

abstract class BaseRocket extends World {
    // Image of the rocket
    Image rocket = new FromFile("rocket.png");
    // Image of rocket flames
    Image flames = new FromFile("flame.png");
}

class TakeOff extends BaseRocket {
    int h;
    
    /**
     * Template
     * 
     * Fields
     *   this.h - int
     *   
     * Methods
     * 
     *   this.onDraw - Scene
     *   this.onTick - TakeOff
     */
    
    TakeOff(int h) {
        this.h = h;
    }
    
    // Redraws the world according to the rocket position
    public Scene onDraw() {
        return new EmptyScene(200,500).placeImage(rocket,100,500-h);
    }
    
    // Creates a new world to move the rocket
    public TakeOff onTick() {
        return new TakeOff(h+5);
    }
}

class LandRocket extends BaseRocket {
    int h;
    
    LandRocket(int h) {
        this.h = h;
    }
    
    public Scene onDraw() {
        return new EmptyScene(200,500).placeImage(rocket,100,500-h);
    }
    
    public LandRocket onTick() {
        if (h > 50) {
            return new LandRocket(h-5);
        } else {
            return new LandRocket(h);
        }
    }
}

class TakeOffAndLandRocket extends BaseRocket {
    int h;
    boolean landing;
    
    /**
     * Template
     * 
     * Fields
     *   this.h     - int
     *   this.landing - boolean
     *   
     * Methods
     *   this.onDraw           - Scene
     *   this.onTick           - TakeOffAndLandRocket
     *   this.addFlames(Scene) - Scene
     */
    
    TakeOffAndLandRocket(int h, boolean landing) {
        this.h = h;
        this.landing = landing;
    }
    
    // Draws the scene of the state of the rocket with flames
    public Scene onDraw() {
        return addFlames(new EmptyScene(200,500).placeImage(rocket,100,500-h));
    }
    
    Scene addFlames(Scene s) {
        if (landing) {
            return s;
        } else {
            return s.placeImage(flames, 100,550-this.h);
        }
    }
    
    public TakeOffAndLandRocket onTick() {
        if (landing) {
            if (h > 50) {
                return new TakeOffAndLandRocket(h-5,landing);
            } else {
                return new TakeOffAndLandRocket(h,false);
            }
        } else {
            if (h > 400) {
                return new TakeOffAndLandRocket(h+5,true);
            } else {
                return new TakeOffAndLandRocket(h+5,landing);
            }
        }
    }
}

class Balloon extends World {
    int x;
    int y;
    
    /**
     * Template
     * 
     * Fields
     * this.x - int
     * this.y - int
     * 
     * Methods
     * this.onDraw  - Scene
     * this.onTick  - Balloon
     * this.onMouse - Balloon
     */
    Balloon(int x, int y) {
        this.x = x;
        this.y = y;
    }
    
    // Draw the balloon into the empty scene
    public Scene onDraw() {
        return new EmptyScene(400,400).placeImage(new Circle(20,"solid","red"), x, y);
    }
    
    // Floats the balloon up on tick
    public Balloon onTick() {
        return new Balloon(this.x,this.y-2);
    }
    
    // Creates a new balloon when you click the mouse
    public Balloon onMouse(int mx, int my, String me) {
        if(me.equals("button-down")) {
            return new Balloon(mx,my);
        } else {
            return this;
        }
    }
}




class RocketExamples {
    BaseRocket toff = new TakeOff(50);
    //World endtoff = toff.bigBang();
    
    // Creates a landing rocket starting at 450
    BaseRocket land = new LandRocket(450);
    // World endland = land.bigBang();
    BaseRocket toffland = new TakeOffAndLandRocket(50,false);
    //World endtoffland = toffland.bigBang();
    
    Balloon bl = new Balloon(200,350);
    World blworld = bl.bigBang();
}