/*
  Unity <---> Arduino (Serial Communication)
  - Send Multiple sensor values to Unity
  Tested Unity version 2019.1.6f
  For 2019 ITP CAMP Workshop "Make your own controller in Unity"
  By Hayeon Hwang. 2019.06.13
*/

const int ledPin = LED_BUILTIN;
const int potPin = A0;  // Analog input pin that the potentiometer is attached to
const int windSensorPin = A1;  // Analog input pin that the potentiometer is attached to

int sensorValue = 0;
int lastSensorValue = 0;

int windValue = 0;
int lastWindValue = 0;

int ledState = 0;
int counter = 0; // ref - 'StateChangeDetection' example

void setup() {
  Serial.begin(9600); // ***important to match with Unity
  pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {

  // ARDUINO ---> UNITY
  sensorValue = analogRead(potPin);
  windValue = analogRead(windSensorPin);

  if (sensorValue != lastSensorValue || windValue != lastWindValue) {
    Serial.print(sensorValue);
    Serial.print(',');
    Serial.println(windValue);
    delay(20);
  }

  lastSensorValue = sensorValue;
  lastWindValue = windValue;


  // UNITY ---> ARDUINO
  readDatafromUnity();
}


void readDatafromUnity() {
  ledState = recvSerial();

  // Make a toggle switch style
  if (ledState == HIGH) {
    counter++;
  }

  if (counter % 2 == 0) {
    digitalWrite(LED_BUILTIN, LOW);
  } else {
    digitalWrite(LED_BUILTIN, HIGH);
  }

}

int recvSerial() {
  if (Serial.available()) {

    int serialData = Serial.read();
    switch (serialData) {
      case '1':
        return 1;
        break;
      case '0':
        return 0;
        break;
      default:
        return -1;
    }
  }
  delay(20);
}