#include <DHT.h>

// Define pins
#define DHTPIN 27       
#define DHTTYPE DHT22     
DHT dht(DHTPIN, DHTTYPE);

#define RED_PIN 26       
#define GREEN_PIN 13    
#define BLUE_PIN  14  

#define BUZZER_PIN 12      
#define SWITCH_PIN_LEFT 19     
#define SWITCH_PIN_RIGHT 18     

volatile int leftSwitched = 1;

volatile unsigned long lastRightSwitchTime = millis();
volatile unsigned long currentRightTime;

volatile unsigned long lastLeftSwitchTime = millis();
volatile unsigned long currentLeftTime;

volatile int switched = 0;

float humidity = 0.0;
float temperature = 0.0;

void IRAM_ATTR rightSwitchInterrupt() {
  switched = 1;
}

void IRAM_ATTR leftSwitchInterrupt() {
  switched = 2;
}

void setup() {
  Serial.begin(115200);
  dht.begin();

  
  pinMode(RED_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);
  pinMode(BLUE_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(SWITCH_PIN_LEFT, INPUT);
  pinMode(SWITCH_PIN_RIGHT, INPUT);

  attachInterrupt(digitalPinToInterrupt(SWITCH_PIN_LEFT), leftSwitchInterrupt, FALLING);
  attachInterrupt(digitalPinToInterrupt(SWITCH_PIN_RIGHT), rightSwitchInterrupt, FALLING);

  Serial.println("Hello");
}

void loop() {
  if (switched == 2) {
    Serial.println("left switched");
    switched = 0;
    setRGBColour(255,0,0);
    delay(2000);
    
  }

  else if (switched==1) {
    Serial.println("right switched");
    switched = 0;
    setRGBColour(0,255,255);
    delay(2000);
  }
  
  else if (switched == 0){
    humidity = dht.readHumidity();
    temperature = dht.readTemperature();
    if (isnan(temperature) && isnan(humidity)) {
      Serial.print("Failed to read from dht sensor.");
    return;
    }
    Serial.print("Temperature: "); Serial.print(temperature); Serial.print(" °C, ");
    Serial.print("Humidity: "); Serial.print(humidity); Serial.println(" %");

    updateRGBColour(humidity);
    checkBuzzerAlert(humidity);

    delay(2000);  
  }
}

// Function to set RGB LED color based on humidity
void updateRGBColour(float humidity) {
  if (humidity >= 30 && humidity < 40) {
    setRGBColour(255, 255, 255);  // White
  } else if (humidity >= 40 && humidity < 50) {
    setRGBColour(0, 0, 255);  // Blue
  } else if (humidity >= 50 && humidity < 60) {
    setRGBColour(0, 255, 0);  // Green
  } else if (humidity >= 60 && humidity < 70) {
    setRGBColour(255, 255, 0);  // Yellow
  } else if (humidity >= 70 && humidity < 80) {
    setRGBColour(255, 165, 0);  // Orange
  } else if (humidity >= 80 && humidity < 90) {
    setRGBColour(255, 0, 0);  // Red
  } else if (humidity >= 90) {
    setRGBColour(128, 0, 128);  // Purple
  }
}

void checkBuzzerAlert(float humidity) {
  if (humidity > 80) {
    tone(BUZZER_PIN, 500,500);  
    delay(500);
  }
}

void setRGBColour(int red, int green, int blue) {
  analogWrite(RED_PIN, 255 - red);
  analogWrite(GREEN_PIN, 255 - green);
  analogWrite(BLUE_PIN, 255 - blue);
}