/**
   Enhanced Arduino Digital Alarm Clock
*/

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

const int COLON_PIN = 13;
const int SPEAKER_PIN = A3;
const int BEEP_DURATION = 100; // Beep duration in ms

Button hourButton(A0);
Button minuteButton(A1);
Button alarmButton(A2);

AlarmTone alarmTone;
Clock clock;
SevSeg sevseg;

enum DisplayState {
  DisplayClock,
  DisplayAlarmStatus,
  DisplayAlarmTime,
  DisplayAlarmActive,
  DisplaySnooze,
};

DisplayState displayState = DisplayClock;
long lastStateChange = 0;
int snoozeDuration = 5; // Default snooze duration in minutes

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

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

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

// Beep feedback function (Simulated using alarmTone)
void beepFeedback() {
  alarmTone.play();
  delay(BEEP_DURATION);
  alarmTone.stop();
}

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

void clockState() {
  displayTime();

  if (alarmButton.read() == Button::RELEASED && clock.alarmActive()) {
    alarmButton.has_changed(); // Read alarmButton to clear its state
    changeDisplayState(DisplayAlarmActive);
    return;
  }

  if (hourButton.pressed()) {
    clock.incrementHour();
    beepFeedback(); // Provide feedback for hour increment
  }
  if (minuteButton.pressed()) {
    clock.incrementMinute();
    beepFeedback(); // Provide feedback for minute increment
  }
  if (alarmButton.pressed()) {
    clock.toggleAlarm();
    changeDisplayState(DisplayAlarmStatus);
    beepFeedback(); // Feedback for toggling the alarm
  }
}

void alarmStatusState() {
  setColon(false);
  sevseg.setChars(clock.alarmEnabled() ? " on" : " off");
  if (millisSinceStateChange() > ALARM_STATUS_DISPLAY_TIME) {
    changeDisplayState(clock.alarmEnabled() ? DisplayAlarmTime : DisplayClock);
    return;
  }
}

void alarmTimeState() {
  DateTime alarm = clock.alarmTime();
  sevseg.setNumber(alarm.hour() * 100 + alarm.minute(), -1);

  if (millisSinceStateChange() > ALARM_HOUR_DISPLAY_TIME || alarmButton.pressed()) {
    changeDisplayState(DisplayClock);
    return;
  }

  if (hourButton.pressed()) {
    clock.incrementAlarmHour();
    lastStateChange = millis();
    beepFeedback(); // Feedback for incrementing alarm hour
  }
  if (minuteButton.pressed()) {
    clock.incrementAlarmMinute();
    lastStateChange = millis();
    beepFeedback(); // Feedback for incrementing alarm minute
  }
  if (alarmButton.pressed()) {
    changeDisplayState(DisplayClock);
  }
}

void alarmState() {
  displayTime();

  if (alarmButton.read() == Button::RELEASED) {
    alarmTone.play();
  }
  if (alarmButton.pressed()) {
    alarmTone.stop();
  }
  if (alarmButton.released()) {
    alarmTone.stop();
    bool longPress = alarmButton.repeat_count() > 0;
    if (longPress) {
      clock.stopAlarm();
      changeDisplayState(DisplayClock);
    } else {
      clock.snooze(); // Use the default snooze function
      changeDisplayState(DisplaySnooze);
    }
  }
}

// New function to change snooze duration
void toggleSnoozeDuration() {
  snoozeDuration += 5;
  if (snoozeDuration > 15) {
    snoozeDuration = 5; // Reset to 5 minutes if it exceeds 15 minutes
  }
  beepFeedback(); // Feedback for changing snooze duration
}

void snoozeState() {
  sevseg.setChars("****");
  if (millisSinceStateChange() > SNOOZE_DISPLAY_TIME) {
    changeDisplayState(DisplayClock);
    return;
  }
}

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

  clock.begin();

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

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

  alarmButton.begin();
  alarmButton.set_repeat(1000, -1);

  alarmTone.begin(SPEAKER_PIN);

  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);

  // Default snooze time feedback on startup
  Serial.print("Snooze Duration: ");
  Serial.println(snoozeDuration);
}

void loop() {
  sevseg.refreshDisplay();

  // Simulate long press for snooze duration toggle
  if (alarmButton.repeat_count() > 5) {
    toggleSnoozeDuration(); // Change snooze duration if long pressed
  }

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

    case DisplayAlarmStatus:
      alarmStatusState();
      break;

    case DisplayAlarmTime:
      alarmTimeState();
      break;

    case DisplayAlarmActive:
      alarmState();
      break;

    case DisplaySnooze:
      snoozeState();
      break;
  }
}