/*
Baby Interface Device V1.0
Build a simple Button-style USB interface for infant learning development.
Build instructions for the device are available at http://matthewroy.com/bid/

Developed by: Matthew C. Roy 2011
Website: http://matthewroy.com/bid/
License: Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0) 
http://creativecommons.org/licenses/by-nc-sa/3.0/

You may share this code and modify for any non-commercial purposes.
*/
const int RGB_R=9;
const int RGB_G=14;
const int RGB_B=15;
const int PBTN=11;

int rgb_rval=255; //initial r val
int rgb_gval=255; //initial g val
int rgb_bval=255; //initial b val

int pbtn_state_cur=0; //cur value of push (for change)
int pbtn_state_prev=0; //prev value of push (for change)

long interval_off=30000; //milliseconds to wait before turning off light
long pbtn_last_press=0; //last time the btn was pressed.
long pbtn_state_timer=0; //milliseconds since push button change


void setup(){  
 pinMode(RGB_R,OUTPUT);
 pinMode(RGB_G,OUTPUT);    
 pinMode(RGB_B,OUTPUT);
 pinMode(PBTN,INPUT);  
}
void loop(){
    // set all 3 pins to the desired intensity
   pbtn_state_timer = millis();
   /*if((pbtn_state_timer-pbtn_last_press)>interval_off){
      rgb_rval=255;
      rgb_gval=255;
      rgb_bval=255; 
   }*/
   if(check_switch()){
     pbtn_last_press=millis();
     rgb_rval=random(0,255);
     rgb_gval=random(0,255);
     rgb_bval=random(0,255);
     Keyboard.set_key1(KEY_SPACE);
     Keyboard.send_now();
     Keyboard.set_key1(0);
     Keyboard.send_now();
   }
   
  analogWrite(RGB_R, rgb_gval);
  analogWrite(RGB_G, rgb_gval);
  analogWrite(RGB_B, rgb_bval);
}
boolean check_switch(){
  pbtn_state_prev=pbtn_state_cur;
  pbtn_state_cur=digitalRead(PBTN);
  if(pbtn_state_prev!=pbtn_state_cur){
    //switch happened
    return true;
  }
  else{
    return false;
  }
}