#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SH110X.h>
#include <OneButton.h>
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
 
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SH1107 display = Adafruit_SH1107(64, 128, &Wire);
int x = 0;
int blink = LOW;
int waterValue = 0;
//KNOP DECLARATIES
OneButton PLUS(0, true, true);
OneButton MIN(13, true, true);
OneButton ENTER(12, true, true);
OneButton RESET(14, true, true);
 
 
 
 
void setup() {
  Serial.begin(9600);
 
 
  //INPUT DECLARATIE VOOR KNOPPEN
  PLUS.attachClick(Plus);
  MIN.attachClick(Min);
  ENTER.attachClick(EnterShort);
  ENTER.attachLongPressStart(EnterLong);
  RESET.attachClick(Reset);
 display.begin(0x3C, true); // Address 0x3C default

  display.clearDisplay(); // wis het display
  display.setTextSize(3); // Draw 2X-scale text
  display.setTextColor(SH110X_WHITE);
  display.setCursor(0, 0);
  display.println("Medi");
  display.display();
 
}
 
 
void loop() {
 
  PLUS.tick();
  MIN.tick();
  ENTER.tick();
  RESET.tick();
  delay(10);
 
  if (blink == HIGH) {
    x++;
    if (x == 50) {
      display.clearDisplay();
      display.setTextSize(3); // Draw 2X-scale text
      display.setTextColor(SH110X_WHITE);
      display.setCursor(10, 0);
      display.println(waterValue);
      display.display();      // Show initial text
 
    }
    if (x == 100) {
      display.clearDisplay();
      display.display();
      x = 0;
    }
  }
 
}
 
 
 
void Plus() {
  if (blink == HIGH) {
    waterValue = waterValue + 50;
    x = 47;
  }
}
 
 
void Min() {
  if (blink == HIGH) {
    if (waterValue >= 50) {
      waterValue = waterValue - 50;
      x = 47;
    }
    else {
      waterValue = 0;
      x = 47;
    }
  }
}
 
void EnterShort() {
 
  if (blink == HIGH) {
    blink = LOW;
 
  }
 
  display.clearDisplay();
  display.setTextSize(3); // Draw 2X-scale text
  display.setTextColor(SH110X_WHITE);
  display.setCursor(10, 0);
  display.println(waterValue);
  display.display();      // Show initial text
  delay(2000);
  display.clearDisplay();
  display.display();
 
 
}
 
void EnterLong() { //lang drukken op enter om water value aan te passen
  x = 47;
  blink = HIGH;
 
}
 
void Reset() {
  display.clearDisplay();
  display.setTextSize(3);
  display.setTextColor(SH110X_WHITE);
  display.setCursor(10, 0);
  display.println("RESET");
  display.display();      // Show initial text
  delay(1000);
  display.clearDisplay();
  display.display();
 
  waterValue = 0;
 
  display.setCursor(10, 0);
  display.println(waterValue);
  display.println("ml");
  display.display();      // Show initial text
  delay(1000);
  display.clearDisplay();
  display.display();
}