//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
//
//  Make Colission better:
//  - https://happycoding.io/tutorials/processing/collision-detection

// 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;

int tilesmoved = 0;
int tilespeed = 3;

// 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(tilespeed);
  baseRect();
  newJump();
  collisionTest();
  generate_tiles();

  helper();
  menuButton();

  fill(0);
  text(tilesmoved, 700, 50);
  tilesmoved = tilesmoved + tilespeed;
  fill(255);
}


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

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

// This is an absolute mess

// TODO Collision erweitern wie in https://happycoding.io/tutorials/processing/collision-detection
void collisionTest() {
  // Collision with baseline
  if ( pos.y > 0.875*height - playerRadius/2 ) {
    pos.set(pos.x, 0.875*height - 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);
    }
  }
}