char foo; //wtf some kind of black magic that makes Serial a thing

/*
  Mimics your timing pattern with flashing light, up to MaxPushes button pushes
  
*/ 

// set pin numbers:
const int buttonPin = 3;     // the number of the pushbutton pin
const int ledPin =  7;      // the number of the LED pin
const int GAP_TIME = 4000;   // gap of how long you have to do nothing before it mimics you, set to 4 seconds
const int MAX_PUSHES = 20;  // maximum number of button pushes the mimicer will track 

// variables will change:
int buttonState;         // variable for reading the pushbutton status
boolean turnedOn;  //tracker variable to tell when button was just turned on or off
boolean neverTurnedOn; //tracks ONLY the very first button push to start the official clock
boolean recordFlag; //flag for determining whether we are in record or playback mode

int startTime;
int currTime;
int elapsedTime;



//these arrays will store the amount of time the button was on or off so they can be recreated.

int onTimeLengths[MAX_PUSHES];
int offTimeLengths[MAX_PUSHES];

// indices for tracking on and offTimes
// (yeah, I know we could use just one but thats a little confusing)

int onTimeIndex;
int offTimeIndex;


void setup() {
  
  // variables will change:
  buttonState = 0;         // variable for reading the pushbutton status
  turnedOn = false;  //tracker variable to tell when button was just turned on or off
  neverTurnedOn = true; //tracks ONLY the very first button push to start the official clock
  recordFlag = true; //flag for determining whether we are in record or playback mode

  startTime = 0;
  currTime = 0;
  elapsedTime = 0;


  onTimeIndex = 0;
  offTimeIndex = 0;
  
  //initialize all values in timing arrays to 0
  for (int i = 0; i < MAX_PUSHES; i++)
  {
  onTimeLengths[i] = 0;
  offTimeLengths[i] = 0;
  }
  
  // initialize the LED pin as an output:
  pinMode(ledPin, OUTPUT);      
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT);
  digitalWrite(buttonPin, HIGH);       // turn on pullup resistors
  
}

void loop(){
  
  while (recordFlag)
  {
    record();
  }
  
  playback();
  
  setup();
  digitalWrite(buttonPin, LOW);
        
}


// this function records the pattern of on's and off's into two arrays to be played back later
void record(){
    
  buttonState = digitalRead(buttonPin);
    
  if (buttonState == LOW) // means button was pressed
    {
      
      // if button was just pushed, start clock
      if (!turnedOn)
      {
        
        if (neverTurnedOn) //if this is the very first button push, dont track offTime
        {
          neverTurnedOn = false;
        } else //track offTime for all other button pushes
        {
          //measure how long button was off for
          currTime = millis();
          elapsedTime = currTime - startTime;
          
          //store elapsed off time and increment index
          offTimeLengths[offTimeIndex] = elapsedTime;
          offTimeIndex++;
          
        }
        
        //start the clock and reset tracker variable
        startTime = millis();
        turnedOn = true;
        
       //turn LED on while button pressed
       digitalWrite(ledPin, HIGH);
      }
      
      ; //stay the same while button is being held down
      
    } else { // button is not pushed
    
      //this code checks to see if button has been off long enough to go to playback
      currTime = millis();
      elapsedTime = currTime - startTime;
      if (elapsedTime > GAP_TIME)
      {
        
        //turn recordFlag off and go to playback
        recordFlag = false;
        return;
      }
      
      if (turnedOn) //means button was just turned off
      {
        
      // measure how long button was on for
      currTime = millis();
      elapsedTime = currTime - startTime;
      
       //store elapsed off time and increment index
       onTimeLengths[onTimeIndex] = elapsedTime;
       onTimeIndex++;
    
       //reset flag for next button push
       turnedOn = false;
      
       // turn LED off:
       digitalWrite(ledPin, LOW); 
      }
      
      ; // do nothing if still unpushed
      
    }
}


void playback()
{
  //temporary indices to walk through arrays
  int tempOnInd = 0;
  int tempOffInd = 0;
  
  while (tempOffInd <= offTimeIndex)
  {
    digitalWrite(ledPin, HIGH); //turn LED on
    
    delay(onTimeLengths[tempOnInd]); // wait for OnTime ms
    
    digitalWrite(ledPin, LOW); //turn LED off
    
    delay(offTimeLengths[tempOffInd]); // wait for OffTime ms
    
    tempOnInd++;
    tempOffInd++;
  }
  

}