#include <Arduino.h>
#include <LiquidCrystal.h>
#include "Bounce.h"

void setup();
void loop();

#define BUFFER_SIZE 64
char buf[BUFFER_SIZE];

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

// A0 = prev; A1 = pause; A2 = next
byte buttons[] = {A0, A1, A2};
#define NUMBUTTONS sizeof(buttons)
#define DEBOUNCE 10
Bounce bounce_buttons[NUMBUTTONS];

void setup() {
	byte i;
	lcd.begin(16, 2);
	Serial.begin(9600);
	Serial.setTimeout(5000);

	for (i = 0; i < NUMBUTTONS; i++) {
		pinMode(buttons[i], INPUT);
		digitalWrite(buttons[i], HIGH);
		bounce_buttons[i] = Bounce(buttons[i], DEBOUNCE);
	}

	Serial.println("ready");
}

bool button_just_pressed(int i) {
	bounce_buttons[i].update();
	return bounce_buttons[i].fallingEdge();
}

void loop() {
	if (button_just_pressed(0)) {
		Serial.println("previous");
	}

	if (button_just_pressed(1)) {
		Serial.println("pause");
	}

	if (button_just_pressed(2)) {
		Serial.println("next");
	}

	// output what we got over serial
	if (Serial.available() >= 32) {
		lcd.setCursor(0, 0);
		Serial.readBytes(buf, 32);
		for (int i = 0; i < 32; i++) {
			if (i == 16) {
				lcd.setCursor(0, 1);
			}
			lcd.write(buf[i]);
		}
	}
}