// =====================================================
// ESP32-C3 + ILI9341 TFT Mega Demo
// 12 Static Scenes + 3 Animated Scenes
// =====================================================

#define USER_SETUP_ID 0x9341
#define ILI9341_DRIVER

// Pin Mapping (ESP32-C3 Mini)
#define TFT_MISO 12
#define TFT_MOSI 13
#define TFT_SCLK 14
#define TFT_CS   10
#define TFT_DC    9
#define TFT_RST   8

#define SPI_FREQUENCY       40000000
#define SPI_READ_FREQUENCY  20000000
#define SPI_TOUCH_FREQUENCY 2500000

#include <TFT_eSPI.h>
#include <SPI.h>

TFT_eSPI tft = TFT_eSPI();

// --------------------
// Animated Ball Vars
// --------------------
int ballX = 40, ballY = 40;
int ballDX = 3, ballDY = 2;
int ballRadius = 10;

// --------------------
// Static Scenes
// --------------------
void sceneLines() {
  tft.fillScreen(TFT_BLACK);
  for (int i = 0; i < tft.width(); i += 10) {
    tft.drawLine(i, 0, i, tft.height(), TFT_RED);
  }
}

void sceneRectangles() {
  tft.fillScreen(TFT_BLACK);
  for (int i = 0; i < 100; i += 10) {
    tft.drawRect(40, 40, i, i, TFT_GREEN);
  }
}

void sceneCircles() {
  tft.fillScreen(TFT_BLACK);
  for (int r = 10; r < 100; r += 10) {
    tft.fillCircle(120, 160, r, TFT_BLUE);
  }
}

void sceneTriangles() {
  tft.fillScreen(TFT_BLACK);
  tft.fillTriangle(40, 200, 120, 40, 200, 200, TFT_MAGENTA);
}

void sceneText() {
  tft.fillScreen(TFT_BLACK);
  tft.setTextColor(TFT_WHITE, TFT_BLACK);
  tft.drawString("ESP32-C3 + ILI9341", 20, 100, 4);
}

void sceneRainbow() {
  for (int y = 0; y < tft.height(); y++) {
    uint16_t color = tft.color565(y * 2, 255 - y, y);
    tft.drawFastHLine(0, y, tft.width(), color);
  }
}

void sceneCheckerboard() {
  tft.fillScreen(TFT_BLACK);
  for (int y = 0; y < tft.height(); y += 20) {
    for (int x = 0; x < tft.width(); x += 20) {
      if ((x + y) % 40 == 0) {
        tft.fillRect(x, y, 20, 20, TFT_YELLOW);
      } else {
        tft.fillRect(x, y, 20, 20, TFT_CYAN);
      }
    }
  }
}

void sceneArcs() {
  tft.fillScreen(TFT_BLACK);
  tft.drawCircle(120, 160, 60, TFT_WHITE);
  tft.drawLine(120, 160, 180, 160, TFT_RED);
  tft.drawLine(120, 160, 120, 100, TFT_GREEN);
}

void scenePolygon() {
  tft.fillScreen(TFT_BLACK);
  tft.fillTriangle(60, 60, 180, 60, 120, 180, TFT_ORANGE);
}

void sceneFonts() {
  tft.fillScreen(TFT_BLACK);
  tft.setTextColor(TFT_WHITE, TFT_BLACK);
  tft.drawString("Font2 Demo", 10, 40, 2);
  tft.drawString("Font4 Demo", 10, 80, 4);
  tft.drawString("Font6 Demo", 10, 120, 6);
}

void sceneSprite() {
  tft.fillScreen(TFT_BLACK);
  tft.fillCircle(100, 100, 30, TFT_PINK);
  tft.fillRect(140, 140, 40, 40, TFT_GREEN);
}

void sceneBranding() {
  tft.fillScreen(TFT_BLACK);
  tft.setTextColor(TFT_YELLOW, TFT_BLACK);
  tft.drawString("AI Centre Nandurbar", 40, 120, 4);
}

// --------------------
// Animated Scenes
// --------------------
void sceneBouncingBall() {
  tft.fillScreen(TFT_BLACK);
  for (int i = 0; i < 200; i++) {
    tft.fillCircle(ballX, ballY, ballRadius, TFT_RED);
    delay(20);
    tft.fillCircle(ballX, ballY, ballRadius, TFT_BLACK); // erase

    ballX += ballDX;
    ballY += ballDY;

    if (ballX - ballRadius < 0 || ballX + ballRadius > tft.width()) ballDX = -ballDX;
    if (ballY - ballRadius < 0 || ballY + ballRadius > tft.height()) ballDY = -ballDY;
  }
}

void sceneScrollingText() {
  tft.fillScreen(TFT_BLACK);
  for (int x = tft.width(); x > -200; x -= 5) {
    tft.fillScreen(TFT_BLACK);
    tft.setTextColor(TFT_GREEN, TFT_BLACK);
    tft.drawString("Welcome to ESP32-C3 Demo!", x, 100, 4);
    delay(30);
  }
}

void sceneColorFade() {
  for (int i = 0; i < 255; i += 5) {
    uint16_t color = tft.color565(i, 255 - i, i / 2);
    tft.fillScreen(color);
    delay(50);
  }
}

// --------------------
// Setup & Loop
// --------------------
void setup() {
  tft.init();
  tft.setRotation(1);
  tft.fillScreen(TFT_BLACK);
}

void loop() {
  // Static gallery
  sceneLines(); delay(1000);
  sceneRectangles(); delay(1000);
  sceneCircles(); delay(1000);
  sceneTriangles(); delay(1000);
  sceneText(); delay(1000);
  sceneRainbow(); delay(1000);
  sceneCheckerboard(); delay(1000);
  sceneArcs(); delay(1000);
  scenePolygon(); delay(1000);
  sceneFonts(); delay(1000);
  sceneSprite(); delay(1000);
  sceneBranding(); delay(1000);

  // Animated gallery
  sceneBouncingBall();
  sceneScrollingText();
  sceneColorFade();
}