//Cat chases mouse bombs drop from pipe

//GLOBALS//
int score = 0; //Score increases by 10 w/ each rat eaten
int eaten = 0;        //Number of rats eaten
int hits = 0;         //Number of bombs hitting cat
int countdown = 0;    //Countdown for cat eating rat

float xCat = 100, yCat = 200;    //Position of the cat
float xRat = 50, yRat = 50;      //Position of the mouse ("rat")
float xBomb = width / 2;
float yBomb = 0;
//Blimp & bomb are halfway across the screen
//Velocity of bomb(down)--ups with accel of gravity
float vBomb = 0;
//float frameRate=30.0;
//Accel of gravity is 9.81 m/s
float gravity = 9.81 / frameRate;

boolean hitCat = false;
boolean nearCat = false;


void setup ( ) {  
  //Big screen initialize
  size ( 640, 888 );
  rectMode ( CENTER );
  ellipseMode ( CENTER );
  //frameRate = 1;
}

void draw ( ) {
  //Move cat, mouse, bomb; check hits; draw everything
  background ( 127, 255, 127 );           //A grassy field
  fill ( 255, 0, 255 );
  
  updateScore ( score );

  //Blimp and bomb
  updateBomb ( );
 
  //Cat
  updateCat ( );

  //Rat
  updateRat ( mouseX, mouseY );        //Rat follows mouse
}
boolean isOver ( float x1, float y1, float x2, float y2, float margin ) {
  //Return true if 1 is over 2
  return ( abs ( x1 - x2 ) < margin ) && ( abs ( y1 - y2 ) < margin );
/*  
  boolean result;
  result = ( abs ( x1 - x2 ) < margin ) && ( abs ( y1 - y2 ) < margin ) );
  return result;

  if ( abs ( x1 - x2 ) < margin && abs ( y1 - y2 ) < margin ) {
      return true;        //True if within this margin
  }
  else {
    return false;
  }
*/
}
void keyPressed ( ){
  yBomb = 1;      //Bomb starts dropping when y>0
  vBomb = 0;
}
//MOVINDG & DRAWING  METHODS
void updateScore ( int n ) {
    text ( "Press any key to drop bomb", 400, 10);
    fill ( 0 );
    if ( score < 0 ) fill ( 255, 0, 0 );
    //Display the score if > 10
    if ( score ! = 0 ) text ( "SCORE:" + score, 400, 30 );
}
void updateBomb ( ) {        //Handle the blimp and bomb
  xBomb = width / 2;
 //First draw blimp and accelerate the bomb
  drawBlimp ( xBomb, yBomb ); //Draw blimp (contains the bomb)
  moveBomb ( );             //Accelerate the bomb
  drawBomb ( xBomb, yBomb ); //Draw bomb unless it's offscreen
  //--  drawBomb ( 100, 100 );//debugging:  dislay static bomb
}
void drawBlimp ( float x, float y ) {
  fill ( 0, 255, 255 );
  rect ( xBomb, 20, 100, 40 );
}
void moveBomb ( ) {
  //Make the bomb fall Let 1o pixels=10m
  if ( yBomb < height ) {   //Accel bomb unless it's offscreen
    vBomb = vBomb + gravity;
    yBomb = yBomb + vBomb;
  }
}
void drawBomb ( float x, float y ) {
  if ( y < height ) {        //Draw bomb unless it's offscreen
  fill ( 0, 127, 127 );
  rect ( x, y, 30, 65 );
  fill ( 255 );
  text ( "B\nO\nM\nB", x, y - 20 );
  fill ( 0 );
  text ( "" + key, x, y + 45 );
  fill ( 255 );
  if ( y < height ) text ( vBomb, 400, 60 );
  }
}
void updateCat ( ) {        //Handle the cat
  if ( hitCat ) {   //Cat was by bomb so move it offscreen
    xCat = -20; yCat = -20;   //Move cat offscreen
    score -= 20;           //Cat loses 20 points
    hits++;
  }
  moveCat ( );                      //Chase the rat
  //Check if bomb near/hit cat
  nearCat = isOver ( xBomb, yBomb, xCat, yCat, 150 );
  //Check if cat hit
  hitCat = isOver ( xBomb, yBomb, xCat, yCat, 75 );
  drawCat ( xCat, yCat );                   //Draw cat
}
void moveCat ( ) {
  //Cat chases mouse
  float xFar = xRat - xCat;
  float yFar = yRat - yCat;
  //Close the distance by half
  xCat = xCat + xFar / 60;
  yCat = yCat + yFar / 60;
}
void drawCat ( float x, float y ) {
  //Check if bomb is over the cat--if so,change cat color
  if ( hitCat ) { //BOMB HIT CAT! Make cat blue (this frame)
    fill ( 0, 0, 255 );
  }
  else if( nearCat ) { //BOMB is near so cat is scared
    fill ( 255, 255, 0); //Make scared cat yellow+harmless
  }
  else {
    //Cat = darker w/ hit but lighter w/ eat
    int darker = 10 * hits;
    int lighter = 10 * eaten;
    fill ( 200 + lighter, 100 - darker, 100 - darker );
  }
  //draw a cat at x,y
  noStroke ( );
  rect ( x, y, 80 - hits, 40 - hits );
  rect ( x + 40, y - 20, 30, 20 );
  triangle ( x + 25, y - 30, x + 30, y - 40, x + 35, y - 30 );  
  triangle ( x + 30, y - 30, x + 35, y - 40, x + 40, y - 30 );  
  fill ( 0 );
  text ( "CAT \n #" + hits, x - 20, y );
}
void updateRat ( float x, float y ) {
  xRat = x; yRat = y;                    //Move rat to new x,y
  if ( mousePressed ) xRat += 50; //Rat jumps to right on click
  //Check if rat is eaten else draw it
  //Use a mouse radius of 50
  if ( ! near Cat && isOver ( xCat, yCat, xRat, yRat, 50 ) ) {
    eatRat ( );
    //Cat eats rat so start countdown
    if ( countdown <= 0 ) countdown = 20;
    countdown--;
    if ( countdown == 0 ) {          //Countdown finished
        xCat = -20; yCat = -20;            //Move cat off-screen
        score += 10;
        eaten++;
    }
    fill ( 0, 127, 0 );
    drawRat ( xRat - 10 + countdown, yRat - 10 + countdown );//Draw rat
  }
  else {
    fill ( 0, 255, 0 );
    drawRat ( xRat, yRat );      //Draw rat
  }  
}
void drawRat ( float x, float y ) {
  //Mouse gets smaller + lighter aft eat
  int smaller = ( 2 * eaten ) %10;
  if ( countdown > 0 ) smaller = -2 * countdown;
  rect ( x - 20, y - 20, 60 - smaller, 30 - smaller / 2 );
  rect ( x - 60, y - 30, 20, 5 );
  fill ( 255, 0, 0 );
  text ( "RAT \n #" + eaten, x - 40, y - 20 );
}
void eatRat ( ) {          //Rat was eat so update scores etc
    background ( 127, 127, 127, 200 );   //Flash background
    text ( "CAT CAUGHT RAT", mouseX + 10, mouseY - 40 );
}