/*
composant :
- boutons poussoir *4
- résistance 1kOhm *4
- écran OLED board-grove-oled-sh1107
- carte arduino UNO
*/

#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <SPI.h>
#include <U8g2lib.h> //Utiliser pour dessiner sur l'écran OLED
#include <Wire.h> //Utiliser pour la commucation I2C de l'écran OLED
#include <RTClib.h> //librairie du module RTC (Real Time Clock)

//Déclaration de l'écran
U8G2_SH1107_128X128_1_HW_I2C u8g2(U8G2_R0);
//Déclaration du module RTC
RTC_DS1307 rtc;

//pins des boutons
#define pin_button_1 13
#define pin_button_2 12
#define pin_button_3 11
#define pin_button_4 10

//variables mémoire de l'état des boutons
bool mem_button_1 = LOW;
bool mem_button_2 = LOW;
bool mem_button_3 = LOW;
bool mem_button_4 = LOW;
bool in_settings = LOW; //si in_settings = 1 alors on est dans le menu paramètre sinon non


//variables des menus
byte menu = 0;
const byte menu_max = 1;
byte menu_settings = 0;
const byte menu_settings_max = 2;

//niveau de la batterie
byte battery_level = 60; //niveau de charge renvoyé par la batterie
char battery_level_1[4]; // % de batterie affiché à l'écran

//variable de l'horloge
int millisecond = 0;
byte second = 0;
byte minute = 0;
byte hour = 0;
byte day = 0;
byte month = 0;
int year = 0;
char time[9];
char date[11];


//variable de test
int test=0;


void setup()
{
  Serial.begin(9600);
  pinMode(pin_button_1,INPUT);
  pinMode(pin_button_2,INPUT);
  pinMode(pin_button_3,INPUT);
  pinMode(pin_button_4,INPUT);
  u8g2.begin();
  rtc.begin();

}

void loop()
{
  DateTime now = rtc.now();
  hour = now.hour();
  minute = now.minute();
  second = now.second();
  day = now.day();
  month = now.month();
  year = now.year();

  //incrémentation des variables de menu
  if (digitalRead(pin_button_1) != mem_button_1 && digitalRead(pin_button_1) == HIGH)
  {
    if (menu == 1 && in_settings == HIGH)
    {
      if (menu_settings < menu_settings_max)
      {
        menu_settings++;
      }
      else
      {
        menu_settings = 0;
      }
    }
    else
    {
      if (menu < menu_max)
      {
       menu++;
      }
      else 
      {
        menu = 0;
      }
    }
    
  }
  mem_button_1 = digitalRead(pin_button_1);

  //décrémentation des variables de menu
  if (digitalRead(pin_button_2) != mem_button_1 && digitalRead(pin_button_2) == HIGH)
  {
    if (menu == 1 && in_settings == HIGH)
    {
      if (menu_settings > 0)
      {
        menu_settings--;
      }
      else
      {
        menu_settings = menu_settings_max;
      }
    }
    else
    {
      if (menu > 0)
      {
        menu--;
      }
      else 
      { 
        menu = menu_max;
      }
    }
  }
  mem_button_2 = digitalRead(pin_button_2);

  //détection des actions "valider" (bouton 3) et "retour" (bouton 4)
  if (digitalRead(pin_button_4) != HIGH && digitalRead(pin_button_3) == HIGH && menu == 1)
  {
    in_settings = 1;
  }
  if (digitalRead(pin_button_3) != HIGH && digitalRead(pin_button_4) == HIGH && menu == 1)
  {
    in_settings = 0;
  }

  //affichage menu horloge (0)
  if (menu == 0)
  {
    u8g2.firstPage();
    do
    {
      u8g2.drawRFrame(0,0,128,14,3);
      u8g2.drawRFrame(0,15,128,44,3);
      u8g2.drawRFrame(0,60,128,68,3);
      u8g2.setFont(u8g2_font_logisoso28_tf);
      sprintf_P(time,PSTR("%02d:%02d"),hour,minute);
      u8g2.drawStr(22,45,time);
      u8g2.setFont(u8g2_font_bpixel_tr);
      sprintf_P(date,PSTR("%02d/%02d/%04d"),day,month,year);
      u8g2.drawStr(35,56,date);
      u8g2.drawLine(24,47,22 + (82.0/60)*second,47);
      //affichage du feedback sur l'utilisation du bras
      u8g2.drawStr(20,80,"feedback du bras");
      //dessin de la batterie
      u8g2.drawLine(120,10,124,10);
      u8g2.drawLine(120,10,120,3);
      u8g2.drawLine(124,10,124,3);
      u8g2.drawLine(123,3,123,2);
      u8g2.drawLine(121,3,121,2);
      u8g2.drawLine(122,2,122,2);
      //affichage du % de batterie
      sprintf_P(battery_level_1,PSTR("%3d"),battery_level);
      u8g2.drawStr(95,10,battery_level_1);
      u8g2.drawStr(112,10,"%");
      if (battery_level >= 10)
      {
        u8g2.drawLine(121,9,123,9);
        if (battery_level >= 25)
        {
          u8g2.drawLine(121,8,123,8);
          if (battery_level >= 45)
          {
            u8g2.drawLine(121,7,123,7);
            if (battery_level >= 60)
            {
              u8g2.drawLine(121,6,123,6);
              if (battery_level >= 70)
              {
               u8g2.drawLine(121,5,123,5);
               if (battery_level >= 80)
                {
                  u8g2.drawLine(121,4,123,4);
                  if (battery_level >= 90)
                  {
                    u8g2.drawLine(122,3,122,3);
                  }
                }
              }
            }
          }
        }
      }  
    }while(u8g2.nextPage());
    
  }

  //affichage menu 1 (paramètres)
  if (menu == 1 && in_settings == 0)
  {
    u8g2.firstPage();
    do
    {
      u8g2.setFont(u8g2_font_bpixel_tr);
      u8g2.drawStr(0,15,"menu_1");
    }while(u8g2.nextPage());
  }

  //affichage de la lise des paramètres
  if (in_settings == 1 && menu == 1)
  {
    u8g2.firstPage();
    do
    {
      u8g2.setFont(u8g2_font_bpixel_tr);
      u8g2.drawStr(0,8,"para1");
      u8g2.drawStr(0,16,"para2");
      u8g2.drawStr(0,24,"para3");
    }while(u8g2.nextPage());
  }
}