//TODO
//- Start Screen
//- Level Editor (click with mouse spawns or deletes tiles)
//  - Hotkey to slide the window right and left
//  - Find a way to make menus
//- Movement berechnen mit move = gravitation - speed
//  - Jump als Zahl, die langsam kleiner wird

// jumping related
float speed = 20;
float gravitation = 9.81;
float jumpheight;
float jumpcooldown = 12;

// for moving x-axis (mostly depracted)
// But dont delete yet!!
PVector direction = new PVector(0,0);
PVector pos = new PVector(220, 50);
int playerRadius = 25;

float actualPos;

PVector tilesize = new PVector(50, 50);

int[][] level;



// The actual game
void play() {
  // calculate actual position on ground
  actualPos = height - pos.y;

  background(255);

  // player
  rectMode(CENTER);
  rect(pos.x, pos.y, playerRadius, playerRadius);

  moveTiles();
  baseline();
  // jumpToJumpheight();
  newJump();
  collisionTest();

  generate_tiles();

  helper();
  // moveTiles();
}


// TODO Collision erweitern wie in https://happycoding.io/tutorials/processing/collision-detection
void collisionTest() {
  // Collision with baseline
  if ( pos.y > baseline_y - playerRadius/2 ) {
    pos.set(pos.x, baseline_y - playerRadius/2);
  }

  // Collision with all the tiles bottom site
  for (int i = 0; i < level.length; i++) {
    boolean xSideEdges = pos.x > level[i][0] - tilesize.x/2 && pos.x < level[i][0] + tilesize.x/2;
    boolean ySideEdges = pos.y < level[i][1] + tilesize.y/2 && pos.y > level[i][1] - tilesize.y/2;

    // Bottom
    if ( (xSideEdges) && (ySideEdges)) {
      pos.set(pos.x, level[i][1] + tilesize.y/2);
    }
    // Top
    if ( (xSideEdges) && (pos.y < level[i][1] + tilesize.y/2 && pos.y > level[i][1] - tilesize.y/2 - playerRadius)) {
      pos.set(pos.x, level[i][1] - tilesize.y/2 - 15);
    }
  }
}

void moveTiles() {
  for (int i = 0; i < level.length; i++) {
    level[i][0] = level[i][0] - 3;
  }
}

int baseline_y = 700;
void baseline() {
  line(0, baseline_y, width, baseline_y);
}

float movement;
float jumpspeed;
void newJump() {
  movement = gravitation - jumpspeed;
  pos.set(pos.x, pos.y + movement);
  if (jumpspeed > 0) {
    jumpspeed--;
  }
}


// Neat helper function, that gives us coordinates of point while clicking
void helper() {
  if (mousePressed == true){
    println(mouseX, mouseY);
  }

}