#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT  64
#define OLED_RESET -1
#define SCREEN_ADDRESS 0x3c

#define BUZZER 5
#define LED_1 15
#define PB_CANCEL 34

Adafruit_SSD1306 display(SCREEN_WIDTH,SCREEN_HEIGHT,&Wire,OLED_RESET);

// Globle variable 
int days = 0;
int hours = 0;
int minutes = 0;
int seconds = 0;

unsigned long timeNow = 0;
unsigned long timeLast = 0;

bool alarm_enabled = true;
int n_alarms = 2;
int alarm_hours[]={0,1};
int alarm_minutes[]={0,10};
bool alarm_triggered[] ={false,false};

int n_notes = 8;
int C = 262;
int D = 294;
int E = 330;
int F = 349;
int G = 392;
int A = 440;
int B = 494;
int C_H = 523;
int notes[] = {C,D,E,F,G,A,B,C_H};



void setup() {
  // put your setup code here, to run once:
  pinMode(BUZZER, OUTPUT);
  pinMode(LED_1, OUTPUT);
  pinMode(PB_CANCEL, INPUT);
  
  Serial.begin(9600);
  if (! display.begin(SSD1306_SWITCHCAPVCC,SCREEN_ADDRESS)){
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }

  display.display();
  delay(2000);

  display.clearDisplay();

  print_line("Welcome to Medibox!",10,20,2);
  delay(500);
  display.clearDisplay();
}

void loop() {
 update_time_with_cheak_alram(); 

}

void print_line(String text,int column,int row ,int text_size){
  display.setTextSize(text_size);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(column,row);
  display.println(text);

  display.display();
}
  
void print_time_now(void){
  display.clearDisplay();
  print_line(String(days),0,0,2);
  print_line(":",20,0,2);
  print_line(String(hours),30,0,2);
  print_line(":",50,0,2);
  print_line(String(minutes),60,0,2);
  print_line(":",80,0,2);
  print_line(String(seconds),90,0,2);
  
}

void update_time(){
  timeNow = millis()/1000;
  seconds = timeNow - timeLast;

  if (seconds >= 60){
    minutes += 1;//minutes = minutes + 1
    timeLast = 60;
  }
  if (minutes ==60 ){
    hours += 1;
    minutes = 0;
  }
  if (hours == 24){
    days += 1;
    hours = 0;
  }

}

void ring_alarm(){
  display.clearDisplay();
  print_line("MEDICINE TIME!",0,0,2);

  digitalWrite(LED_1, HIGH);

  bool break_happened = false;

  //Ring the Buzzer
  while(digitalRead(PB_CANCEL) == HIGH){
    for(int i=0; i<n_notes; i++){
      if (digitalRead(PB_CANCEL) == LOW){
        delay(200);
        break_happened = true;
        break;
      }
      tone(BUZZER,notes[i]);
      delay(500);
      noTone(BUZZER);
      delay(2);
    }
   }
  
  digitalWrite(LED_1, LOW);
  display.clearDisplay();

}

void update_time_with_cheak_alram(void){
  update_time();
  print_time_now();

  if (alarm_enabled == true){
    for (int i=0;i<n_alarms;i++){
      if(alarm_triggered[i]==false && alarm_hours[i] == hours && alarm_minutes[i] == minutes){
        ring_alarm();
        alarm_triggered[i] = true 
      }
    }
  }
}