//TODO
//- Start Screen
//- Level Editor (click with mouse spawns or deletes tiles)
//  - Hotkey to slide the window right and left
//- 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 movement = new PVector(0,0);
PVector direction = new PVector(0,0);
PVector pos = new PVector(220, 50);
int playerRadius = 25;

float actualPos;


void setup() {
  size(800,800);
  frameRate(60);
  smooth(4);

}

void draw() {

  // rectMode(CENTER);
  // rect(50, 50, 100, 50);
  // textAlign(CENTER);
  // fill(0);
  // text("test", 50, 50);
  // noFill();


  menu();
  // play();
  helper();
}

boolean ismenu;
void menu() {
  rectWithText(width/2, height/2, 100, 50, "test", 40);
}


void rectWithText(float rectX, float rectY, float rectWidth, float rectHeight, String rectText, float ts) {
  // rect
  rectMode(CENTER);
  rect(rectX, rectY, rectWidth, rectHeight);

  // text
  textSize(ts);
  textAlign(CENTER,CENTER);
  fill(0);
  text(rectText, rectX, rectY);

  // stop painting
  noFill();

}

void mouseClicked() {
}

// 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);

  baseline();
  collisionTest();
  cooldown();
  jumpToJumpheight();

  generate_tiles();

  helper();
}

// This is basically the Level file:
// It consists out of an array, that spawns tiles
// It is also checked in collisionTest()
int[] tiles_x = { 300, 50, 600 };
int[] tiles_y = { 500, 50, 600 };

void generate_tiles() {
  for (int i = 0; i < tiles_x.length; i++ ) {
    rect(tiles_x[i], tiles_y[i], 50, 50);
  }
}
// TODO Collision erweitern wie in https://happycoding.io/tutorials/processing/collision-detection
void collisionTest() {
  // Collision with baseline
  if ( pos.y > baseline_y - playerRadius ) {
    pos.set(pos.x, baseline_y - playerRadius);
  }
  // Collision with all the tiles top site
  for (int i = 0; i < tiles_x.length; i++) {
    if ((pos.x > tiles_x[i]-25 && pos.x < tiles_x[i]+25) && pos.y < tiles_y[i] - playerRadius) {
      pos.set(pos.x, tiles_y[i] - playerRadius);
    }
  }
}

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


// ##### Movement related
//
// all there is to jumping
void jumpToJumpheight() {
  // control gravitation
  pos.set(pos.x, pos.y + gravitation);
  // turn gravity of if we are jumping
  if (actualPos < jumpheight) {
    gravitation = 0;
  } else {
    gravitation = 9.81;
  }

  if (actualPos < jumpheight) {
    pos.y = pos.y - speed;
    jumpcooldown = 40;
  } else {
    jumpheight = 0;
  }
}

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

// actions for moving
void keyPressed() {
  if (key == CODED)
  {
    if (keyCode == LEFT)
    {
        direction.x = -1;
        pos.x = pos.x + direction.x * speed;
    }
    else if (keyCode == RIGHT)
    {
      //if (directionX<0) {
      direction.x = +1;
      pos.x = pos.x + direction.x * speed;
      //}
    }
    if (keyCode == UP)
    {
      //if (directionY<0) {
      jumpspeed =+ 25;
    //}
    }
    // else if (keyCode == DOWN)
    // {
    //   //if (directionY<0) {
    //   direction.y = +1;
    //   pos.y = pos.y + direction.y * speed;
    //   //}
    // }
  }
}

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

}