//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;

int[][] loadJson(String jsonfile) {
  JSONArray values = loadJSONArray(jsonfile);
  // println(values.size());

  int[][] arrayfromjson = new int[values.size()][values.size()];
  for (int i = 0; i < values.size(); i++) {

    JSONArray jsontoarray = values.getJSONArray(i);

    int x = jsontoarray.getInt(0);
    int y = jsontoarray.getInt(1);
    int rectwidth = jsontoarray.getInt(2);
    int rectheight = jsontoarray.getInt(3);

    // arrayfromjson_x[i] = x;
    arrayfromjson[i][0] = x;
    arrayfromjson[i][1] = y;
    arrayfromjson[i][2] = rectwidth;
    arrayfromjson[i][3] = rectheight;
  }
  return arrayfromjson;
}


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();

}


// 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();
}

// 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, 50};
int[] tiles_y = { 500, 50, 600, 200 };

// 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);
  }

}