#include <FiniteStateMachine.h>
#include <Button.h>
#include <LED.h>

const byte NUMBER_OF_STATES = 4; //how many states are we cycling through?

//initialize states
State On = State(ledOn);
State Off = State(ledOff); 
State FadeIn = State(ledFadeIn);
State FadeOut = State(ledFadeOut); 

FSM ledStateMachine = FSM(On);     //initialize state machine, start in state: On
//initialize the button (wire between pin 12 and ground)
Button button = Button(12,BUTTON_PULLUP); 
LED led = LED(11);                 //initialize the LED
byte buttonPresses = 0;            //counter variable, hols number of button presses

void setup() { /*nothing to setup*/
}

//poor example, but then again; it's just an example
void loop()
{
  if (button.uniquePress())
  {
    //increment buttonPresses and constrain it to [ 0, 1, 2, 3 ]
    buttonPresses = ++buttonPresses % NUMBER_OF_STATES; 
    switch (buttonPresses)
    {
    case 0: 
      ledStateMachine.transitionTo(On); 
      break;
    case 1: 
      ledStateMachine.transitionTo(Off); 
      break;
    case 2: 
      ledStateMachine.transitionTo(FadeIn); 
      break;
    case 3: 
      ledStateMachine.transitionTo(FadeOut); 
      break;
    }
  }
  ledStateMachine.update();
}

void ledOn() { 
  led.on();
}
void ledOff() { 
  led.off();
}
void ledFadeIn() { 
  led.fadeIn(500);
}
void ledFadeOut() { 
  led.fadeOut(500);
}