#include <SPI.h>
#include <Ucglib.h>

// Pin mapping for ESP32-2432S028 (CYD)
#define TFT_CS   15
#define TFT_DC   2
#define TFT_RST  -1   // Not connected
#define TFT_SCK  14
#define TFT_MOSI 13
#define TFT_MISO 12

// UCGLib constructor for ILI9341 SPI (hardware SPI)
Ucglib_ILI9341_18x240x320_HWSPI ucg(/*cd=*/TFT_DC, /*cs=*/TFT_CS, /*reset=*/TFT_RST);

void setup() {
  Serial.begin(115200);
  Serial.println("ESP32-2432S028 UCGLib Awesome Art");

  SPI.begin(TFT_SCK, TFT_MISO, TFT_MOSI, TFT_CS);
  ucg.begin(UCG_FONT_MODE_TRANSPARENT);
  ucg.clearScreen();
  ucg.setRotate270();   // Landscape orientation
}

// Gradient background
void gradientScene() {
  for (int x = 0; x < ucg.getWidth(); x++) {
    ucg.setColor(x % 255, (x*2) % 255, (255-x) % 255);
    ucg.drawVLine(x, 0, ucg.getHeight());
  }
  ucg.setFont(ucg_font_helvB18_tr);
  ucg.setColor(255, 255, 255);
  ucg.setPrintPos(40, 40);
  ucg.print("CINEMATIC GRADIENT");
  delay(3000);
}

// Geometric art
void geometricScene() {
  ucg.clearScreen();
  for (int i = 0; i < 10; i++) {
    ucg.setColor((i*25)%255, (i*50)%255, (i*75)%255);
    ucg.drawCircle(160, 120, i*10, UCG_DRAW_ALL);
    ucg.drawBox(40+i*10, 60+i*5, 40, 40);
  }
  ucg.setFont(ucg_font_ncenR14_tr);
  ucg.setColor(255, 255, 0);
  ucg.setPrintPos(60, 220);
  ucg.print("GEOMETRIC ART");
  delay(3000);
}

// Grid rainbow scene
void rainbowGridScene() {
  ucg.clearScreen();
  for (int x = 0; x < ucg.getWidth(); x += 20) {
    ucg.setColor((x*3)%255, (x*5)%255, (x*7)%255);
    ucg.drawVLine(x, 0, ucg.getHeight());
  }
  for (int y = 0; y < ucg.getHeight(); y += 20) {
    ucg.setColor((y*7)%255, (y*3)%255, (y*5)%255);
    ucg.drawHLine(0, y, ucg.getWidth());
  }
  ucg.setFont(ucg_font_9x15_tr);
  ucg.setColor(0, 255, 255);
  ucg.setPrintPos(100, 100);
  ucg.print("RAINBOW GRID");
  delay(3000);
}

void loop() {
  gradientScene();
  geometricScene();
  rainbowGridScene();
}