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

//Define OLED parameters
#define screen_width 128
#define screen_height 64
#define OLED_reset -1
#define screen_address 0x3c

//Declare objects
Adafruit_SSD1306 display(screen_width, screen_height, &Wire, OLED_reset);

//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_hours[] = {1, 10};
bool alarm_triggered = {false, false};

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  if(!display.begin(SSD1306_SWITCHCAPVCC, screen_address)) { // Address 0x3D for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }

  //display.display();
  //delay(2000);
  display.clearDisplay();

  
  print_line("Welcome to the ", 20, 20, 1);
  print_line("MediBox", 45, 40, 1);
  delay(2000);
  display.clearDisplay();
}


void loop() {
  update_time_with_check_alarm();
}

void print_line(String text, int column, int row, int txt_size){
  
  display.setTextSize(txt_size);
  display.setTextColor(WHITE);
  display.setCursor(column, row);
  // Display static text
  display.println(text);
  display.display(); 
}

void print_time_now(void){
  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);
  display.clearDisplay();
}

void update_time(void){
  timeNow = millis()/1000;
  seconds = timeNow - timeLast;
  if(seconds >= 60 ){
    minutes += 1;
    timeLast = millis()/1000;
  }
  if(minutes == 60){
    hours += 1;
    minutes = 0;
  }
  if(hours == 24){
    days += 1;
    hours == 0;
  }
}

void update_time_with_check_alarm(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 == hours && alarm_minutes == minutes){
        ring_alarm();
      }
    } 
  }
}