#include <SPI.h>
#include <TFT_eSPI.h>
#include <SD.h>
#include <DHT.h>
#include <Adafruit_NeoPixel.h>
#include <XPT2046_Touchscreen.h>

// Pin definitions
#define TFT_LED        32
#define SD_CS          15
#define LDR_PIN        34
#define GAS_PIN        36
#define DHT_PIN        27
#define DHT_TYPE       DHT22
#define ENCODER_A      33
#define ENCODER_B      25
#define ENCODER_SW     26
#define NEOPIXEL_PIN   5
#define NUM_PIXELS     8
#define BUZZER_PIN     13
#define TOUCH_CS       14  // assuming default in Wokwi part

TFT_eSPI tft = TFT_eSPI();
DHT dht(DHT_PIN, DHT_TYPE);
Adafruit_NeoPixel strip(NUM_PIXELS, NEOPIXEL_PIN, NEO_GRB + NEO_KHZ800);
XPT2046_Touchscreen touch(TOUCH_CS);

int relayState = LOW;
unsigned long lastLog = 0;

void setup(){
  Serial.begin(115200);
  tft.init(); tft.setRotation(1);
  pinMode(TFT_LED, OUTPUT); analogWrite(TFT_LED, 255);

  if (!SD.begin(SD_CS)){
    Serial.println("SD card failed!");
  } else Serial.println("SD card ready");

  dht.begin();

  pinMode(ENCODER_A, INPUT_PULLUP);
  pinMode(ENCODER_B, INPUT_PULLUP);
  pinMode(ENCODER_SW, INPUT_PULLUP);

  strip.begin(); strip.show();

  pinMode(BUZZER_PIN, OUTPUT); digitalWrite(BUZZER_PIN, LOW);
}

void loop(){
  float temp = dht.readTemperature(), hum = dht.readHumidity();
  int light = analogRead(LDR_PIN), gas = analogRead(GAS_PIN);

  int b = map(light, 0, 4095, 255, 10);
  analogWrite(TFT_LED, b);

  if (millis() - lastLog > 5000){
    File log = SD.open("/log.txt", FILE_APPEND);
    if (log){
      log.printf("%lu,%.1f,%.1f,%d,%d\n", millis(), temp, hum, light, gas);
      log.close();
    }
    lastLog = millis();
  }

  tft.fillScreen(TFT_BLACK);
  tft.setTextSize(2);
  tft.setTextColor(TFT_YELLOW, TFT_BLACK);
  tft.setCursor(10, 20);
  tft.println("Temp: " + String(temp,1) + "C");
  tft.println("Hum : " + String(hum,1) + "%");
  tft.println("Lght: " + String(light));
  tft.println("Gas : " + String(gas));
  tft.println("Bright: " + b);

  if (digitalRead(ENCODER_SW)==LOW){
    relayState = !relayState;
    tone(BUZZER_PIN, 1000, 100);
    for (int i=0;i<strip.numPixels();i++){
      strip.setPixelColor(i, relayState ? strip.Color(0,255,0) : strip.Color(255,0,0));
    }
    strip.show();
    delay(300);
  }

  if (touch.touched()){
    TS_Point p = touch.getPoint();
    tft.setCursor(10, 140);
    tft.setTextColor(TFT_CYAN);
    tft.print("Touch at ");
    tft.print(p.x); tft.print(","); tft.print(p.y);
  }

  delay(1000);
}