#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"

#define TFT_DC    4
#define TFT_CS    5
#define TFT_MOSI  6
#define TFT_CLK   7
#define TFT_CTRL 45
#define TFT_RST  48

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_MOSI, TFT_CLK, TFT_RST);

const char* message = "I AM ARVIND FROM INDIA 947020336035";
int msgIndex = 0;
unsigned long previousMillis = 0;
const long interval = 100;  // 🔁 Faster typing
bool ranFractal = false;

void setup() {
  Serial.begin(115200);
  pinMode(TFT_CTRL, OUTPUT);
  digitalWrite(TFT_CTRL, HIGH);

  tft.begin();
  const uint8_t mode = 0x48;
  tft.sendCommand(ILI9341_MADCTL, &mode, 1);

  tft.fillScreen(ILI9341_BLACK);
  tft.setCursor(88, 40);
  tft.setTextColor(ILI9341_RED);
  tft.setTextSize(3);
  tft.println("ESP32-S3");

  tft.setCursor(60, 80);
  tft.setTextColor(ILI9341_CYAN);
  tft.setTextSize(2);
  tft.println("MANDELBROT ART");
  delay(1000);
}

void loop() {
  if (!ranFractal) {
    renderMandelbrot();
    ranFractal = true;
    delay(2000);
    tft.fillScreen(ILI9341_BLACK);
    tft.setCursor(36, 106);
  }

  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;

    if (message[msgIndex] == '\n') {
      tft.setCursor(36, tft.getCursorY() + 20);
    } else {
      tft.print(message[msgIndex]);
    }

    if (message[msgIndex] != '\0') {
      msgIndex++;
    } else {
      tft.fillRect(36, 106, 220, 60, ILI9341_BLACK);
      tft.setCursor(36, 106);
      msgIndex = 0;
    }
  }
}

void renderMandelbrot() {
  int w = tft.width();
  int h = tft.height();
  int maxIter = 15;

  for (int py = 0; py < h; py += 2) {
    for (int px = 0; px < w; px += 2) {
      float x0 = (px - w / 2.0) * 3.5 / w;
      float y0 = (py - h / 2.0) * 2.0 / h;
      float x = 0.0;
      float y = 0.0;
      int iteration = 0;

      while (x * x + y * y <= 4 && iteration < maxIter) {
        float xtemp = x * x - y * y + x0;
        y = 2 * x * y + y0;
        x = xtemp;
        iteration++;
      }

      uint16_t color = (iteration == maxIter)
        ? ILI9341_BLACK
        : tft.color565(iteration * 16, 255 - iteration * 8, iteration * 6);

      tft.fillRect(px, py, 2, 2, color);
    }
  }
}