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

// WiFi credentials
const char* ssid     = "Airtel_arvi_6035";
const char* password = "air26289";

// SPI pin setup for ILI9341
#define TFT_CS    15
#define TFT_DC     2
#define TFT_RST    4
#define TFT_CLK   18
#define TFT_MOSI  23
#define TFT_MISO  19

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

// Rainbow palette
#define RAINBOW_COUNT 7
uint16_t rainbowColors[RAINBOW_COUNT] = {
  tft.color565(255, 0, 0),      // Red
  tft.color565(255, 127, 0),    // Orange
  tft.color565(255, 255, 0),    // Yellow
  tft.color565(0, 255, 0),      // Green
  tft.color565(0, 0, 255),      // Blue
  tft.color565(75, 0, 130),     // Indigo
  tft.color565(148, 0, 211)     // Violet
};

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi");

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nConnected!");
  configTime(19800, 0, "pool.ntp.org");  // India Standard Time

  tft.begin();
  tft.setRotation(1);
}

void loop() {
  drawRainbow();      // Show background rainbow
  displayTime();      // Show current time
  delay(1000);
}

void drawRainbow() {
  int barHeight = tft.height() / RAINBOW_COUNT;
  for (int i = 0; i < RAINBOW_COUNT; i++) {
    tft.fillRect(0, i * barHeight, tft.width(), barHeight, rainbowColors[i]);
  }
}

void displayTime() {
  struct tm timeinfo;
  if (!getLocalTime(&timeinfo)) {
    Serial.println("Time not available");
    return;
  }

  char timeStr[16];
  strftime(timeStr, sizeof(timeStr), "%H:%M:%S", &timeinfo);

  tft.setTextColor(ILI9341_WHITE);
  tft.setTextSize(3);
  tft.setCursor(40, 120);
  tft.print(timeStr);
}