#include <Arduino.h>
#include <TM1637Display.h>
 
// Module connection pins (Digital Pins) for Display TM1637
#define CLK 3
#define DIO 2

TM1637Display display(CLK, DIO);

int next_Hatch = 1;

int hour1 = 13;   //Alarm 1 hour
int minute1 = 00; // Alarm 1 minute
int time1 = 0;     // Variable that shows time in display

int hour2 = 18;   // Alarm 2 hour
int minute2 = 00; // Alarm 2 minute
int time2 = 0;     // Variable that shows time in display

int alarmChosen = 1;  // Variable for choosing which alarm to edit

int buttonMinute = 9;   // Button for changing minute
int buttonHour = 8;     // Button for changing hour
int slidePin = 10;      // SlideSwitch for waking up arduino
int almchooserPin = 12;  // Button for changing which alarm to edit

int minuteState = 0;    //  State of the minute button (if it's pressed or not)
int hourState = 0;      //  State of the hour button  (if it's pressed or not)
int slideState = 0;     //  State of slideswitch button  (if it's active or not)
int almchooserState =0;  //  State of alarm chooser button (if it's pressed or not) 

int awake = 0;              // variable for if loop. Millis() start time and end time
unsigned long time_start;   // Time when program's starting to run
unsigned long time_elapsed; // Elapsed time form start to end of program
int time_limit = 3000;      // Time limit for judging if it's an alarm wakeup or if it's a switch wakeup. Written in miliseconds.

// Create an array that sets individual segments per digit to display the word "A1"
const uint8_t A_one[] = {
  SEG_A | SEG_B | SEG_C | SEG_E | SEG_F | SEG_G,   // A
  SEG_B | SEG_C                                    // 1
};

// Create an array that sets individual segments per digit to display the word "A2"
const uint8_t A_two[] = {
  SEG_A | SEG_B | SEG_C | SEG_E | SEG_F | SEG_G,   // A
  SEG_A | SEG_B | SEG_G | SEG_E | SEG_D            // 2
};

const uint8_t H_one[] = {
  SEG_B | SEG_C | SEG_E | SEG_F | SEG_G,           // H
  SEG_B | SEG_C                                    // 1
};

const uint8_t H_two[] = {
  SEG_B | SEG_C | SEG_E | SEG_F | SEG_G,           // H
  SEG_A | SEG_B | SEG_G | SEG_E | SEG_D            // 2
};

const uint8_t H_three[] = {
  SEG_B | SEG_C | SEG_E | SEG_F | SEG_G,           // H
  SEG_A | SEG_B | SEG_C | SEG_D | SEG_G            // 3
};

const uint8_t H_four[] = {
  SEG_B | SEG_C | SEG_E | SEG_F | SEG_G,           // H
  SEG_B | SEG_C | SEG_F | SEG_G                    // 4
};



void setup() {
// Setting up all buttons and switches
pinMode(buttonMinute, INPUT);
pinMode(buttonHour, INPUT);
pinMode(slidePin, INPUT_PULLUP);
pinMode(almchooserPin, INPUT);
display.setBrightness(1);       // Setting brightness of TM1637 diplay

Serial.begin(9600);
}

void loop() {
// Setting up buttons and switches for state observation
minuteState = digitalRead(buttonMinute);
hourState = digitalRead(buttonHour);
slideState = digitalRead(slidePin);
almchooserState = digitalRead(almchooserPin);

if(slideState == HIGH){

  // Starting timer for keeping track if it's a alarm wakeup or if it's switch wakeup
  if(awake == 0){
    time_start = millis();
    
    // Display which hatch that's opening
    if(next_Hatch == 1){
          display.setSegments(H_one,2,2);
      }else if(next_Hatch == 2){
        display.setSegments(H_two,2,2);
      }
      delay(1000);
      display.clear();

    awake = 1;
  }

  // Alarm button switch code
  if(almchooserState == HIGH && minuteState == LOW && hourState == LOW){
    switch(alarmChosen){
    case 1:
      alarmChosen = 2;
      display.clear();
      display.setSegments(A_two,2,2);
      delay(1000);
      break;
    case 2:
      alarmChosen = 1;
      display.clear();
      display.setSegments(A_one,2,2);
      delay(1000);
      break;
    }
  }
  
  // Set new time alarm 1
  if(alarmChosen == 1 && almchooserState == LOW){
    if(minuteState == HIGH && hourState == LOW && minute1 < 60){
      minute1++;
      delay(300);
    }
    if(minute1 >= 60){
      minute1 = 0;
    }
    if(hourState == HIGH && minuteState == LOW && hour1 < 24){
      hour1++;
      delay(300);
    }
    if(hour1 >= 24){
      hour1 = 0;
    }

    time1 = hour1*100+minute1;
    display.showNumberDecEx(time1);

  }
  // Set new time alarm 2
  if (alarmChosen == 2 && almchooserState == LOW){
    if(minuteState == HIGH && hourState == LOW && minute2 < 60){
        minute2++;
        delay(300);
      }
      if(minute2 >= 60){
        minute2 = 0;
      }
      if(hourState == HIGH && minuteState == LOW && hour2 < 24){
        hour2++;
        delay(300);
      }
      if(hour2 >= 24){
        hour2 = 0;
      }

      time2 = hour2*100+minute2;
      display.showNumberDecEx(time2);
    }
  }else{
    display.clear();

    // Checking how long the arduino has been running
    // for later to evaluate if it's a alarm wakeup or switch wakeup
    if(awake == 1){
      time_elapsed = millis() - time_start;
      awake = 0;
      Serial.println("Elapsed time:");
      Serial.println(time_elapsed); // prints time since program started
    
    // Evaluation if it's an alarm or switch wakeup
    // This determines if hatches should open or not
     if(time_elapsed > time_limit){
      Serial.println("It's a switch wakeup. Don't open hatches");
      // enterSleep();
      }else{
        Serial.println("It's an alarm wakeup. Open hatch!");
        // Run OpenDoor();
        // enterSleep();
      }
    }

  }
}