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

#define SCREENWIDTH 128 //OLED display width in pixels
#define SCRRENHEIGHT 64 //OLED display height in pixels
#define OLEDRESET -1 //Reset pin 
#define SCRRENADDRESS 0x3C /// < see data sheet for address

#define BUZZER 5
#define LED_1 15

Adafruit_SSD1306 display(SCREENWIDTH,SCRRENHEIGHT, &Wire,  OLEDRESET );

//global variables
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[] = {1,10};
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);

  Serial.begin(9600);
  if(!display.begin(SSD1306_SWITCHCAPVCC, SCRRENADDRESS )){
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }
  // show initial display buffer contents on the screen
  // the library initializes this with an Adafruit splash scrren.
  display.display();
  delay(500);

  //clear the buffer
  display.clearDisplay();

  print_line("welcome medibox",10,20,2);
  display.clearDisplay();
}

void loop() {
  // put your main code here, to run repeatedly:
  //delay(10); // this speeds up the simulation
  update_time_with_check_alarm();
  
}
void print_line(String text, int column, int row, int text_size){
  display.setTextColor(SSD1306_WHITE);
  display.setTextSize(text_size);
  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; //milisec convert to sec
  seconds= timeNow - timeLast;

  if (seconds >= 60){
    minutes += 1;
    timeLast += 60;
  }

  if(minutes == 60){
    minutes = 0;
    hours += 1;
  }

  if (hours == 24){
    hours = 0;
    days += 1;
  }
  //enable the alarms again
 /* for (int i =0; i<n_alarms; i++){
    alarm_triggered[i] = false;
  }*/
}

void ring_alarm(){
  display.clearDisplay();
  print_line("MEDICINE TIME",0,0,2) ;
   digitalWrite(LED_1, HIGH);

   //ring the buzzer
   for(int i=0; i< n_notes;i++){
     tone(BUZZER,notes[i]);
    delay(500);
    noTone(BUZZER);
    delay(2); 
   }
    digitalWrite(LED_1, LOW);
    display.clearDisplay();
  }








void update_time_with_check_alarm(void){
  display.clearDisplay();
  update_time();
  print_time_now();

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

}