#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"
#include "Taskfun.h"
#include <MusicBuzzer.h>

// For the Adafruit shield, these are the default.
#define TFT_DC 9   // UNO+NANO= 9, ESP=2
#define TFT_CS 10  // UNO+NANO=10, ESP=15

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

#define WIDTH 320
#define HEIGHT 240

#define BUZZER_PIN 3

struct STAR {
  float x;
  float y;
  float size;
  float distance;
};

struct STAR stars[50];
const int starslen = sizeof(stars)/sizeof(stars[0]);

void generateStar(STAR& star) {
  star.x = random(WIDTH);
  star.y = random(HEIGHT);
  star.size = random(5) / 10.0;
  star.distance = random(100);
}

void generateStars() {
  for(auto i = 0; i < starslen; ++i) {
    generateStar(stars[i]);
  }
}

void updateStar(STAR& star, float zoom) {
  star.distance -= zoom;
  if (star.distance < 0.1) {
    generateStar(star);
  } else {
    star.x += zoom / star.distance * (star.x < WIDTH / 2) ? -1 : 1;
    star.y += zoom / star.distance * (star.y < HEIGHT / 2) ? -1 : 1;
    star.size = star.size + zoom / star.distance;
  }

}

void drawStar(STAR& star, int16_t color) {
  tft.fillCircle(star.x, star.y, star.size / 2, color);
}

void starZoom(float zoom) {
  while(1) {   
    for(auto i = 0; i < starslen; ++i) {
      auto& star = stars[i];
      drawStar(star, 0);
      updateStar(star, 1.2);
      drawStar(star, 0xFFFF);
    }
    yield();
  };
}

void starwarsSong(int) {
  while(1) {
    music.pinkpanther();
  }
}

void setup() {
  tft.begin();
  tft.setRotation(1);

  music.init(BUZZER_PIN);
  
  generateStars();
  
  setupTasks();
  runTask(starwarsSong, 0, 640, 0);
  runTask(starZoom, 1.2f, 640, 2);
}

void loop() {
  yield();
}