// Practice Exercise

// Creating a circuit that warns when pressure is applied. When the button is pressed, the led turns on, and when pressure is applied above 600, the led begins to blink.

int photoCellPin = A0;  // Pin for the photo cell
int buttonPin = D4;     // Pin for the pushbutton
int ledPin = D1;        // Pin for the LED

// Variable to hold the light reading
int photoCellReading = 0;

// Variable to track the LED state
bool ledOn = false;

// Variable to track the button press state
bool buttonPressed = false;

void setup()
{
  // Set up pins for input/output
  pinMode(photoCellPin, INPUT);
  pinMode(buttonPin, INPUT_PULLUP); // Use internal pull-up resistor
  pinMode(ledPin, OUTPUT);
  
  // Create a cloud variable of type integer called 'light' mapped to photoCellReading
  Particle.variable("light", &photoCellReading, INT);
}

void loop()
{
  // Read the photo cell value (0-4095)
  photoCellReading = analogRead(photoCellPin);

  // Check the pushbutton state
  if (digitalRead(buttonPin) == LOW && !buttonPressed) { // Button pressed
    ledOn = !ledOn;       // Toggle the LED state
    buttonPressed = true; // Prevent multiple toggles
  } 
  else if (digitalRead(buttonPin) == HIGH) { // Button released
    buttonPressed = false; // Reset button press tracking
  }

  // Control the LED
  if (ledOn) {
    if (photoCellReading > 600) {
      // Blink the LED
      digitalWrite(ledPin, HIGH);
      delay(100);
      digitalWrite(ledPin, LOW);
      delay(100);
    } 
    else {
      // Turn the LED on steadily
      digitalWrite(ledPin, HIGH);
    }
  } 
  else {
    // Turn the LED off
    digitalWrite(ledPin, LOW);
  }
}