import geometry.*;
import colors.*;
import draw.*;
import java.util.Random;
// shark class
class Shark {
  int y;
  int size;

  Shark(int y, int size) {
    this.y = y;
    this.size = size;
  }
  
 // returns a new shark for a givin key input
 /*
   ...this.y...    -- int
   ...keyInput...  --string
   ...this.size... --int
 */

  Shark onKeyEvent(String input){
     if (input.equals("up"))
     return new Shark(this.y - 5, this.size);
     else 
     if (input.equals("down"))
     return new Shark(this.y + 5, this.size);
     else
     return this;
  }
  
  // Draws the shark on a givin canvas
  /*
   ...this.y...    -- int
   ...canvas...    -- canvas
   ...this.size... -- int
  */

  boolean drawShark(Canvas c){
    return c.show() &&
    c.drawCircle(new Posn(50, this.y), this.size, new Black());
    }
    
   // makes the shark hungrier as the game proceeds
   /*
   ...this.y...    -- int
   ...this.size... -- int
   */
  Shark onTick(){
   if (this.size == 4)
   return new Shark(this.y, 4);
   else
   return new Shark(this.y, (this.size - 1));
   }
   // when the shark eats a fish it gets bigger
   /*
   ...this.y...    -- int
   ...this.size... -- int
   */
   Shark eatFish(){
   return new Shark(this.y, (this.size + 25));
  }
}

// Fish Class
class Fish {
  int x;
  int y;

  Fish(int x, int y) {
    this.x = x;
    this.y = y;
  }
// ticks the fish forword along the canvas
/*
  ...this.x... -int
  ...this.y... -int
*/

 Fish onTick(){
  return new Fish((this.x - 5), this.y);
}
// returns true if a fish has escaped the shark
/*
  ...this.x... -int
  ...this.y... -int
*/
boolean escaped(){
  if (this.x < 0)
  return true;
  else
  return false;
  }

// Draws a fish on the canvas
/*
  ...this.x... -int
  ...this.y... -int
  ...canvas... -canvas
*/ 
boolean DrawFish(Canvas c){
    return c.show() &&
    c.drawCircle(new Posn(this.x, this.y), 3, new Red());
    
}
// shark found fish
/*
  ...this.x...     -int
  ...this.y...     -int
  ...shark.y...    -int
  ...shark.size... -int
*/ 
boolean sharkFoundFish(Shark shark){
  return Math.sqrt(Math.pow((this.x - 50), 2) +
    Math.pow((this.y - shark.y), 2)) <= shark.size;
 
}
}

// Ocean world
class OceanWorld extends World{
  Shark shark;
  Fish fish1;
  Fish fish2;
  Fish fish3;
  Canvas oceanScene;

  OceanWorld(Shark shark, Fish fish1, Fish fish2, Fish fish3, Canvas oceanScene) {
    this.shark = shark;
    this.fish1 = fish1;
    this.fish2 = fish2;
    this.fish3 = fish3;
    this.oceanScene = oceanScene;
  }
  
  World onTick(){
   if (this.fish1.escaped())
   return new OceanWorld(this.shark, new Fish(300, 
   (new Random().nextInt() % 290)), this.fish2, this.fish3, this.oceanScene);
   else
   if (this.fish2.escaped())
   return new OceanWorld(this.shark, this.fish1, new Fish(300, 
   (new Random().nextInt() % 290)), this.fish3, this.oceanScene);
   else
   if (this.fish3.escaped())
   return new OceanWorld(this.shark, this.fish1, this.fish2, new Fish(300, 
   (new Random().nextInt() % 290)), this.oceanScene);
   else
   if (this.fish1.sharkFoundFish(this.shark))
   return new OceanWorld(this.shark.eatFish(), new Fish(300, 
   (new Random().nextInt() % 290)), this.fish2, this.fish3, this.oceanScene);
   else
   if (this.fish2.sharkFoundFish(this.shark))
   return new OceanWorld(this.shark.eatFish(), this.fish1, new Fish(300, 
   (new Random().nextInt() % 290)), this.fish3, this.oceanScene);
   else
   if (this.fish3.sharkFoundFish(this.shark))
   return new OceanWorld(this.shark.eatFish(), this.fish1, this.fish2, new Fish(300, 
   (new Random().nextInt() % 290)), this.oceanScene);
   else
   if (this.shark.size == 0)
   return this.endOfWorld("you lose");
   else
   return new OceanWorld(this.shark.onTick(), 
     this.fish1.onTick(), this.fish2.onTick(), this.fish3.onTick(), this.oceanScene);
   }
 World onKeyEvent(String input){
   return new OceanWorld(this.shark.onKeyEvent(input), 
     this.fish1, this.fish2, this.fish3, this.oceanScene);
   }
   
 boolean draw(){
   return (this.theCanvas.show()) &&
    (this.theCanvas.drawRect(new Posn(0, 0), 300, 200, new Blue())) &&
    (this.fish1.DrawFish(this.theCanvas)) &&
    (this.fish2.DrawFish(this.theCanvas)) &&
    (this.fish3.DrawFish(this.theCanvas)) &&
    (this.shark.drawShark(this.theCanvas));
 }
    
    // start the world and the timer
  boolean go() {
    return this.bigBang(300,200,.05); }
  
}




class Example{
  Example(){}
  Shark intShark = new Shark(100, 75);
  Fish  fish1   = new Fish (300, 10);
  Fish  fish2   = new Fish (300, 100);
  Fish  fish3   = new Fish (300, 140);
  Canvas canvas = new Canvas(300, 200);
  OceanWorld ocean1 = new OceanWorld(this.intShark, this.fish1, this.fish2, this.fish3, this.canvas);

  /// SHARK
 /*           
  boolean onkey = 
            (check this.intShark.onKeyEvent("down") expect new Shark(105, 10)) 
            &&
            (check this.intShark.onKeyEvent("up") expect new Shark(95, 10));
          
  boolean ontick = check this.intShark.onTick() expect new Shark(100, 9);
  
  boolean eatfish = check this.intShark.eatFish() expect new Shark(100, 14);
  
  /// FISH
  
  boolean ontick2 = check this.afish.onTick() expect new Fish(299, 50);
  
  boolean escape  = check this.afish.escaped() expect false;
  */
  /// OceanWorld

                           

  
  boolean draw = this.ocean1.draw();
    
      OceanWorld sfw = this.ocean1;
  boolean start = this.sfw.go();
      }