#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#include <SPI.h>

#define TFT_CS    10
#define TFT_RST   9
#define TFT_DC    8
#define TFT_WIDTH  320
#define TFT_HEIGHT 240

Adafruit_ILI9341 tft(TFT_CS, TFT_DC, TFT_RST);

class TFTArtShow {
private:
  Adafruit_ILI9341& display;

public:
  TFTArtShow(Adafruit_ILI9341& tft) : display(tft) {}

  void begin() {
    display.begin();
    display.setRotation(3);
    display.fillScreen(ILI9341_BLACK);
  }

  void run() {
    drawRainbowBackground();
    drawShapes();
    drawAttractiveDesign();
  }

  void drawShapes() {
    drawCircle();
    drawTriangle();
    drawRectangle();
    drawPolygon(5, 100, ILI9341_YELLOW); // Pentagon
    drawPolygon(6, 100, ILI9341_CYAN);   // Hexagon
    drawStar();
    drawEllipse();
    drawPolygon(8, 100, ILI9341_PURPLE); // Octagon
  }

  void drawCircle() {
    int x = TFT_WIDTH / 2, y = TFT_HEIGHT / 2;
    for (int r = 100; r > 0; r -= 10) {
      display.fillScreen(ILI9341_BLACK);
      drawRainbowBackground();
      display.drawCircle(x, y, r, ILI9341_RED);
      delay(500);
    }
  }

  void drawTriangle() {
    int x = TFT_WIDTH / 2, y = TFT_HEIGHT / 2;
    for (int size = 100; size > 0; size -= 10) {
      display.fillScreen(ILI9341_BLACK);
      drawRainbowBackground();
      int h = size / 2;
      display.drawTriangle(x, y - h, x - h, y + h, x + h, y + h, ILI9341_GREEN);
      delay(500);
    }
  }

  void drawRectangle() {
    int x = TFT_WIDTH / 2, y = TFT_HEIGHT / 2;
    for (int s = 100; s > 0; s -= 10) {
      display.fillScreen(ILI9341_BLACK);
      drawRainbowBackground();
      display.drawRect(x - s/2, y - s/2, s, s, ILI9341_BLUE);
      delay(500);
    }
  }

  void drawStar() {
    int x = TFT_WIDTH / 2, y = TFT_HEIGHT / 2;
    for (int s = 100; s > 0; s -= 10) {
      display.fillScreen(ILI9341_BLACK);
      drawRainbowBackground();
      int r = s / 2;
      for (int i = 0; i < 5; i++) {
        float a1 = i * 72 * PI / 180;
        float a2 = (i * 72 + 144) * PI / 180;
        display.drawLine(
          x + r * cos(a1), y - r * sin(a1),
          x + r * cos(a2), y - r * sin(a2),
          ILI9341_MAGENTA
        );
      }
      delay(500);
    }
  }

  void drawEllipse() {
    int x = TFT_WIDTH / 2, y = TFT_HEIGHT / 2;
    for (int s = 100; s > 0; s -= 10) {
      display.fillScreen(ILI9341_BLACK);
      drawRainbowBackground();
      int a = s / 2, b = s / 4;
      for (int d = 0; d < 360; d++) {
        float rad = d * PI / 180;
        int px = x + a * cos(rad);
        int py = y + b * sin(rad);
        display.drawPixel(px, py, ILI9341_ORANGE);
      }
      delay(500);
    }
  }

  void drawPolygon(int sides, int size, uint16_t color) {
    int x = TFT_WIDTH / 2, y = TFT_HEIGHT / 2;
    float angleStep = 2 * PI / sides;
    int prevX = x + size * cos(0);
    int prevY = y - size * sin(0);
    for (int i = 1; i <= sides; i++) {
      float angle = i * angleStep;
      int newX = x + size * cos(angle);
      int newY = y - size * sin(angle);
      display.drawLine(prevX, prevY, newX, newY, color);
      prevX = newX; prevY = newY;
    }
    delay(500);
  }

  void drawAttractiveDesign() {
    for (int i = 0; i < 35; i++) {
      uint16_t c = display.color565(random(255), random(255), random(255));
      display.drawCircle(TFT_WIDTH/2, TFT_HEIGHT/2, 100, c);
      delay(100);
      display.fillScreen(ILI9341_BLACK);
      drawRainbowBackground();
    }

    display.setCursor(TFT_WIDTH / 2 - 60, TFT_HEIGHT - 25);
    display.setTextColor(ILI9341_WHITE);
    display.setTextSize(2);
    display.print("अरविंद द्वारे"); // “By Arvind” in Marathi
  }

  void drawRainbowBackground() {
    for (int x = 0; x < TFT_WIDTH; x++) {
      float hue = (float)x / TFT_WIDTH;
      uint16_t color = HSVtoRGB(hue, 1.0, 1.0);
      display.drawLine(x, 0, x, TFT_HEIGHT, color);
    }
  }

  uint16_t HSVtoRGB(float h, float s, float v) {
    int i = int(h * 6);
    float f = h * 6 - i;
    float p = v * (1 - s);
    float q = v * (1 - f * s);
    float t = v * (1 - (1 - f) * s);
    float r, g, b;
    switch (i % 6) {
      case 0: r = v, g = t, b = p; break;
      case 1: r = q, g = v, b = p; break;
      case 2: r = p, g = v, b = t; break;
      case 3: r = p, g = q, b = v; break;
      case 4: r = t, g = p, b = v; break;
      case 5: r = v, g = p, b = q; break;
    }
    return display.color565(r * 255, g * 255, b * 255);
  }
};

TFTArtShow artShow(tft);

void setup() {
  artShow.begin();
}

void loop() {
  artShow.run();
}