// Define pins for sensors and outputs
const int heartRatePin = A0;       // Heart rate sensor analog input
const int tempPin = A1;            // Temperature sensor analog input
const int ledRed = 9;              // RGB LED Red pin
const int ledGreen = 10;           // RGB LED Green pin
const int ledBlue = 11;            // RGB LED Blue pin
const int buzzerPin = 12;          // Buzzer pin

// Threshold values for detecting "stress" state
const int heartRateThreshold = 600; // Adjust based on calibration
const float tempThreshold = 33.0;   // Example threshold in Celsius

void setup() {
    // Set up serial communication
    Serial.begin(9600);

    // Set LED and buzzer pins as outputs
    pinMode(ledRed, OUTPUT);
    pinMode(ledGreen, OUTPUT);
    pinMode(ledBlue, OUTPUT);
    pinMode(buzzerPin, OUTPUT);

    // Welcome message
    Serial.println("Emotional State Detector Initialized");
}

void loop() {
    // Read sensor values
    int heartRateValue = analogRead(heartRatePin);
    int tempValue = analogRead(tempPin);

    // Convert temperature sensor reading (assuming LM35 sensor)
    float temperature = (tempValue * 5.0 * 100) / 1024; // LM35 outputs 10mV per °C

    // Output readings for debugging
    Serial.print("Heart Rate Value: ");
    Serial.println(heartRateValue);
    Serial.print("Temperature (°C): ");
    Serial.println(temperature);

    // Determine emotional state based on sensor values
    if (heartRateValue > heartRateThreshold && temperature > tempThreshold) {
        // Stressed state
        showStressedState();
        Serial.println("State: Stressed");
    } else {
        // Calm state
        showCalmState();
        Serial.println("State: Calm");
    }

    // Wait for a second before next reading
    delay(1000);
}

void showStressedState() {
    // Turn on red LED and sound the buzzer for stressed state
    digitalWrite(ledRed, HIGH);
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledBlue, LOW);
    tone(buzzerPin, 1000); // 1000 Hz tone for buzzer
}

void showCalmState() {
    // Turn on green LED and turn off buzzer for calm state
    digitalWrite(ledRed, LOW);
    digitalWrite(ledGreen, HIGH);
    digitalWrite(ledBlue, LOW);
    noTone(buzzerPin); // Stop buzzer
}