/*
This program was written to control the 
SAW 3 Digital Voice Recorder available at
All Electronics.

It is a salute to LOST - the clip will play
every 108 minutes. If you press press a button
it will record a new clip, but you really could
just mannually do that with the SAW doll's own
button if you like.

Carlyn Maw
May 2010
 */
 
const int pushButtonPin = 2;

const int playPin = 4;    
const int recordPin = 10;

const int clipLength = 5000;

int pushButtonState = 0;
int lastPushButtonState = 0;  

int recordFlag = 0;
int playFlag = 0;

//TIMING VARIABLES
long lastMillis= 0;
long currentMillis = 0;

long waitPeriod = 6480000;
long flipTime = 0;


// The setup() method runs once, when the sketch starts

void setup()   {                
  // initialize the digital pin as an output:
  pinMode(pushButtonPin, INPUT); 
  pinMode(playPin, OUTPUT);  
  pinMode(recordPin, OUTPUT);   
  
  Serial.begin(9600);
  playClip();
}

// the loop() method runs over and over again,
// as long as the Arduino has power

void loop()                     
{
  lastPushButtonState = pushButtonState;  // dumps the buttpn State from the last loop into previous holder
  pushButtonState = digitalRead(pushButtonPin); // refreshes the button state


  lastMillis = currentMillis; // dumps the time from the last loop into previous holder
  currentMillis = millis();  // refreshes time constant

    if (waitPeriod < (currentMillis- flipTime)) {
      flipTime = currentMillis;  
      playFlag = true;
    }  else {
      playFlag = false;
    }  
  
if (pushButtonState != lastPushButtonState && pushButtonState == false) {
    delay(50);  // debounce delay needed. 
    //See Examples > digital > debounce for a better way
    recordFlag ? recordFlag=false : recordFlag=true;
  } else {
    recordFlag = false;
  } 

//Play the clip if it time and you aren't supposed to be recording
if (playFlag == true && recordFlag ==false) {
  Serial.println("Press The Button!");
  //putting the flip time before keeps
  flipTime = currentMillis;
  playClip();
}

//Record the clip if it's time, play it back and then reset timer

if (recordFlag) {
   recordClip();
   playClip();
   //if you'd like to reset the clock once you've recorded a new clip
   //uncomment the line below, otherwise it will play the clip on schedule.
   //if you were recording while it was supposed to be playing, you will
   //end up shifting when the next one will play a bit.
   //flipTime = millis();
} 
  

}

//------------------------------------------------- END MAIN LOOP

void playClip() {
  digitalWrite(playPin, HIGH);   // set the LED on
  delay(clipLength);                  // wait for a second
  digitalWrite(playPin, LOW);    // set the LED off
  delay(500); 
}


void recordClip(){
  digitalWrite(recordPin, HIGH);   // set the LED on
  delay(clipLength);                  // wait for a second
  digitalWrite(recordPin, LOW);  
  delay(500);
}