/*
 * Project Kansha
 * Description: A device to show gratitude over long distances.
 * Author: Woo Kim, Anna Lawn, Olivia Roy, Corey Williams
 * Date: 2/13/2018
 */

long lastPublishedAt = 0; // This value will store the last time we published an event
int publishAfter = 10000; // this is the time delay before we should publish a new event

//Assign global variables.
int redPin = D1;
int greenPin = D2;
int bluePin = D3;
int redValue = 255;
int greenValue = 255;
int blueValue = 255;

int capPin = D4;
int servoPin = A4;
int capReading = 0;
Servo servo;
bool shouldGesture = false;


 void setup() {

   Serial.begin(9600);
   //Particle.function("servoControl", servoControl);

   Particle.subscribe(  "diot/2018/paired/kansha" , handleSharedEvent ); //Subscribe to event for Kansha project.
   servo.attach(servoPin); //Attach servo motor.
   servo.write(2); //Move servo to starting position.
   //Assign output pins.
   pinMode (redPin, OUTPUT);
   pinMode (greenPin, OUTPUT);
   pinMode (bluePin, OUTPUT);
   //Assign input pins.
   pinMode (capPin, INPUT);
   setRGBColor(0,0,0); //Turn RGB LED on to start.
 }

 void loop() {
   capReading = digitalRead(capPin); //Read if cap touch sensor is activated.

   if (capReading == HIGH) { //Publish event when cap touch sensor is activated.

     publishMyEvent();
   }

   if(shouldGesture == true ){
     kanshaGesture(); //Do this if paired photon publishes event.
     shouldGesture = false;
   }
   delay(100);
 }
 //Function for publishing event without spamming.
 void publishMyEvent() {

   if( lastPublishedAt + publishAfter < millis() ) {

       String eventName = "diot/2018/paired/kansha" + System.deviceID();
       Particle.publish( eventName );
       lastPublishedAt = millis();
   }
 }
 //Create a function to act when an event is published by paired photon, and not by this photon.
 void handleSharedEvent(const char *event, const char *data)
 {
     String eventName = String( event ); // Convert to a string object.
     String deviceID = System.deviceID();
     if( eventName.indexOf( deviceID ) != -1 ){ //Don't do anything if the event was published by this device.
       shouldGesture = true;
       return;
     }
     kanshaGesture();
     Serial.println("here");
 }

//Set RGB color.
void setRGBColor( int r, int g, int b ){

  redValue = r;
  greenValue = g;
  blueValue = b;
  analogWrite(redPin, 255 - redValue);
  analogWrite(greenPin, 255 - greenValue);
  analogWrite(bluePin, 255 - blueValue);
}
//Create a function to turn on lights and move servo motor for Kansha gesture.
void kanshaGesture() {

  setRGBColor(255,255,255);
  delay(2000);
  servo.write(52);
  delay(5000);
  servo.write(2);
  delay(2000);
  setRGBColor(0,0,0);
}