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

// Pin connections for ESP32-C3 → ILI9341
#define TFT_CS   5   // Chip Select
#define TFT_DC   2   // Data/Command
#define TFT_RST  4   // Reset 4(or -1 if tied to EN pin)

// SPI pins (hardware SPI on ESP32-C3)
#define TFT_MOSI 7   // GPIO7
#define TFT_SCLK 6   // GPIO6
#define TFT_MISO 10  // optional, not always needed

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

void setup() {
  Serial.begin(115200);
  tft.begin();
  tft.setRotation(1);   // Landscape orientation
  tft.fillScreen(ILI9341_BLACK);

  Serial.println("ESP32-C3 + ILI9341 Graphics Test");
}

void loop() {
  // Test 1: Fill color sweep
  for (int c = 0; c < 256; c += 5) {
    uint16_t color = tft.color565(c, 255 - c, (c * 2) % 255);
    tft.fillScreen(color);
    delay(50);
  }

  // Test 2: Line burst
  tft.fillScreen(ILI9341_BLACK);
  for (int i = 0; i < tft.width(); i += 10) {
    tft.drawLine(tft.width()/2, tft.height()/2, i, 0, ILI9341_RED);
    tft.drawLine(tft.width()/2, tft.height()/2, i, tft.height(), ILI9341_GREEN);
  }

  // Test 3: Rectangles
  for (int i = 0; i < 20; i++) {
    int x = random(tft.width());
    int y = random(tft.height());
    int w = random(20, 80);
    int h = random(20, 80);
    uint16_t color = tft.color565(random(255), random(255), random(255));
    tft.fillRect(x, y, w, h, color);
    delay(100);
  }

  // Test 4: Circles
  for (int i = 0; i < 20; i++) {
    int x = random(tft.width());
    int y = random(tft.height());
    int r = random(10, 40);
    uint16_t color = tft.color565(random(255), random(255), random(255));
    tft.fillCircle(x, y, r, color);
    delay(100);
  }

  // Test 5: Text
  tft.fillScreen(ILI9341_BLACK);
  tft.setTextColor(ILI9341_YELLOW);
  tft.setTextSize(2);
  tft.setCursor(20, 40);
  tft.println("ESP32-C3 + ILI9341");
  tft.setTextSize(3);
  tft.setCursor(20, 80);
  tft.println("Graphics Demo");
  delay(2000);
}