#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include "U8glib.h"


#define OLED_RESET -1 
const int buttonPin1 = 2;    
int buttonState1 = 0;
const int buttonPin2 = 3;    
int buttonState2 = 0;
int hours = 9;
int minutes = 30;
int seconds = 0;
char *number1[12]={"6","5","4","3","2","1","12","11","10","9","8","7"};
const int SCREEN_WIDTH = 128;
const int SCREEN_HEIGHT = 64;
float radius = min(SCREEN_HEIGHT, SCREEN_WIDTH)/2-1;

const int X_CENTER = SCREEN_WIDTH / 2;
const int Y_CENTER = SCREEN_HEIGHT / 2;

int x1, y1, x2, y2;
double angle;


U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE|U8G_I2C_OPT_DEV_0);  // I2C / TWI 
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

void draw(void) {
  //u8g.drawCircle(X_CENTER, Y_CENTER, radius);
  u8g.drawCircle(X_CENTER, Y_CENTER, 1);
  //draw minute's ticks (60 lines)
  for(int j=1; j<=60; j++){
    angle = j*6;
    angle = angle * 0.0174533;

    x1 = X_CENTER + (sin(angle) * radius);
    y1 = Y_CENTER + (cos(angle) * radius);
    x2 = X_CENTER + (sin(angle) * (radius));
    y2 = Y_CENTER + (cos(angle) * (radius));
    u8g.drawLine(x1,y1,x2,y2);
    
  }
  //draw hour's ticks (12 lines)
  for(int j=0; j<12; j++){
    angle = j*30;
    angle = angle * 0.0174533;

    x1 = X_CENTER + (sin(angle) * radius);
    y1 = Y_CENTER + (cos(angle) * radius);
    x2 = X_CENTER + (sin(angle) * (radius - 4));
    y2 = Y_CENTER + (cos(angle) * (radius - 4));
    u8g.drawLine(x1,y1,x2,y2);
    //draw hour digits(12 lines)
    x2 = X_CENTER + (sin(angle) * (radius - 8));
    y2 = Y_CENTER + (cos(angle) * (radius - 8));
    u8g.setFont(u8g_font_chikita);
    char buffer[3];
sprintf(buffer, "%s", number1[j]);
u8g.drawStr(x2 - 2, y2 + 3, buffer);

    angle = seconds*6;
    angle = angle * 0.0174533;
    x2 = X_CENTER + (sin(angle) * (radius - 1));
    y2 = Y_CENTER - (cos(angle) * (radius - 1));
    u8g.drawLine(X_CENTER,Y_CENTER,x2,y2);

    angle = minutes*6;
    angle = angle * 0.0174533;
    x2 = X_CENTER + (sin(angle) * (radius - 10));
    y2 = Y_CENTER - (cos(angle) * (radius - 10));
    u8g.drawLine(X_CENTER,Y_CENTER,x2,y2);

    angle = hours*30 + ((minutes / 12) * 6);
    angle = angle * 0.0174533;
    x2 = X_CENTER + (sin(angle) * (radius / 2));
    y2 = Y_CENTER - (cos(angle) * (radius / 2));
    u8g.drawLine(X_CENTER,Y_CENTER,x2,y2);


  }
}

void setup() {
  // by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3C for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }
  display.display(); // Display startup message
  delay(2000);
  display.clearDisplay(); // Clear the buffer
  pinMode(buttonPin1, INPUT);
  pinMode(buttonPin2, INPUT);
  
}



void loop() {
  
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
   buttonState1 = digitalRead(buttonPin1);
 buttonState2 = digitalRead(buttonPin2);
  
  // rebuild the picture after some delay
  delay(500);
   

  if (buttonState1 == LOW) {
    seconds +=1;
  if(seconds==60){ seconds=seconds-60; minutes +=1;}
  if(minutes==60){ minutes=0; hours +=1;}
  if(hours==24){hours=1;}
    u8g.firstPage();  
  do {
    draw();
  } while( u8g.nextPage() ); 
   
  //delay(800);
 
  } else if (buttonState1 == HIGH){
 display.setCursor(0, 0);
  display.print("medicine1 at ");
  display.println("7am");
  display.setCursor(0,25);
display.print("medicine2 at ");
display.print("1pm");
display.setCursor(0,50);
display.print("medicine3 at ");
display.println("9pm");
  display.display(); // Show the text
delay(500); }  

 else if (buttonState2 == LOW) 
 {  // Check if the new button is pressed
seconds +=1;
  if(seconds==60){ seconds=seconds-60; minutes +=1;}
  if(minutes==60){ minutes=0; hours +=1;}
  if(hours==24){hours=1;}
    u8g.firstPage();  
  do {
    draw();
  } while( u8g.nextPage() ); 
      
  }else if (buttonState2 == HIGH){

 display.setCursor(0, 0);
    display.print("date1");
    display.display(); // Show the text
    delay(500);


  }
 
  

 


 
}