#include "Adafruit_TLC5947.h"

int pins[] = {
    A0,
    A1,
    A2,
    A3,
    A4,
    A5,
    2,
    3,
    7,
    8,
    9,
    10,
    11,
    12,
};
bool states[] = { false, false, false, false, false, false, false, false, false, false, false, false, false, false };
#define numButtons 14

#define NUM_TLC5974 2
#define data 4
#define clock 5
#define latch 6

Adafruit_TLC5947 tlc = Adafruit_TLC5947(NUM_TLC5974, clock, data, latch);

void setup()
{
    Serial.begin(115200);
    tlc.begin();

    for (int i = 0; i < numButtons; i++) {
        pinMode(pins[i], INPUT_PULLUP);
    }
}

unsigned long elapsedTime = 0;

#define loopDelayTime 100

void loop()
{
    unsigned long currentTime = millis();
    if (currentTime - elapsedTime >= loopDelayTime) {
        elapsedTime = currentTime;
        checkButtons();
    }
}

void checkButtons()
{
    for (int i = 0; i < numButtons; i++) {
        bool* currentValue = &states[i];
        bool newValue = !digitalRead(pins[i]);
        if (*currentValue != newValue) {
            *currentValue = newValue;
            sendUpdate(i, newValue);
        }
    }
};

void sendUpdate(int buttonId, bool state)
{
    Serial.print(buttonId);
    Serial.println(state);
};

const int BUFFER_SIZE = 42;
char buf[BUFFER_SIZE];

void handleUpdate()
{
    for (int i = 0; i < BUFFER_SIZE; i += 3) {
        tlc.setLED(i, buf[i], buf[i + 1], buf[i + 2]);
        tlc.write();
    }
}

void serialEvent()
{
    while (Serial.available()) {
        int outputId = Serial.read();
        Serial.readBytesUntil('\n', buf, BUFFER_SIZE);
        Serial.print(F("Arduino-Update Output: "));
        Serial.println(outputId);
        handleUpdate();
    }
}