/**
   Arduino Digital Clock (12-hour format)

   Copyright (C) 2020, Uri Shaked.
   Released under the MIT License.

*/

#include <SevSeg.h>
#include "Button.h"
#include "Clock.h"
#include "config.h"

const int COLON_PIN = 13;

Button hourButton(A0);
Button minuteButton(A1);

Clock clock;
SevSeg sevseg;

enum DisplayState {
  DisplayClock,
};

DisplayState displayState = DisplayClock;
long lastStateChange = 0;

void changeDisplayState(DisplayState newValue) {
  displayState = newValue;
  lastStateChange = millis();
}

long millisSinceStateChange() {
  return millis() - lastStateChange;
}

void setColon(bool value) {
  digitalWrite(COLON_PIN, value ? LOW : HIGH);
}

void displayTime() {
  DateTime now = clock.now();
  bool blinkState = now.second() % 2 == 0;
  int hour = now.hour();
  if (hour > 12) {
    hour -= 12;
  }
  if (hour == 0) {
    hour = 12;
  }
  sevseg.setNumber(hour * 100 + now.minute());
  setColon(blinkState);
}

void clockState() {
  displayTime();

  if (hourButton.pressed()) {
    clock.incrementHour();
  }
  if (minuteButton.pressed()) {
    clock.incrementMinute();
  }
}

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

  clock.begin();

  hourButton.begin();
  hourButton.set_repeat(500, 200);

  minuteButton.begin();
  minuteButton.set_repeat(500, 200);

  pinMode(COLON_PIN, OUTPUT);

  byte digits = 4;
  byte digitPins[] = {2, 3, 4, 5};
  byte segmentPins[] = {6, 7, 8, 9, 10, 11, 12};
  bool resistorsOnSegments = false;
  bool updateWithDelays = false;
  bool leadingZeros = true;
  bool disableDecPoint = true;
  sevseg.begin(DISPLAY_TYPE, digits, digitPins, segmentPins, resistorsOnSegments,
               updateWithDelays, leadingZeros, disableDecPoint);
  sevseg.setBrightness(90);
}

void loop() {
  sevseg.refreshDisplay();

  switch (displayState) {
    case DisplayClock:
      clockState();
      break;
  }
}