//====================================================================
//  OLED DISPLAY
//====================================================================
//  LIBRARY INCLUDE
//--------------------------------------------------------------------
  
  // Include Libraries
  #include  <Wire.h>
  #include  <SSD1306Wire.h>

  // Display Instance
  SSD1306Wire display(0x3c, 21, 22);

//--------------------------------------------------------------------
//  OLED Initialization
//--------------------------------------------------------------------

  void oled_init() {
    display.init();
    display.flipScreenVertically();
    display.setFont(ArialMT_Plain_10);
  }

//--------------------------------------------------------------------
//  OLED Display Text
//--------------------------------------------------------------------

  void drawTextFlowDemo(String Text) {
    display.setFont(ArialMT_Plain_10);
    display.setTextAlignment(TEXT_ALIGN_LEFT);
    display.drawStringMaxWidth(0, 0, 128, Text);
  }

//--------------------------------------------------------------------
//  OLED LEFT TEXT Display
//--------------------------------------------------------------------

  void drawTextLeft() {
    display.setFont(ArialMT_Plain_10);
    display.setTextAlignment(TEXT_ALIGN_LEFT);
    display.drawString(0, 10, "Left aligned (0,10)");
  }

//--------------------------------------------------------------------
//  OLED CENTER TEXT Display
//--------------------------------------------------------------------

  void drawTextCenter(int X, int Y, int Size, String Text) {
    //display.setFont(ArialMT_Plain_10);
    
    if(Size == 1) {
      display.setFont(ArialMT_Plain_10);
    } else if(Size == 2) {
      display.setFont(ArialMT_Plain_16);
    } else if(Size == 3) {
      display.setFont(ArialMT_Plain_24);
    } else {
      display.setFont(ArialMT_Plain_10);
    }
    
    display.setTextAlignment(TEXT_ALIGN_CENTER);
    display.drawString(X, Y, Text);
  }

//--------------------------------------------------------------------
//  OLED RIGHT TEXT DISPLAY
//--------------------------------------------------------------------

  // OLED Display
  void drawTextRight() {
    display.setFont(ArialMT_Plain_10);
    display.setTextAlignment(TEXT_ALIGN_RIGHT);
    display.drawString(128, 33, "Right aligned (128,33)");
  }

//--------------------------------------------------------------------
//  OLED DRAW RECTANGLE
//--------------------------------------------------------------------
  
  void drawRectDemo() {
    // Draw a pixel at given position
    for (int i = 0; i < 10; i++) {
      display.setPixel(i, i);
      display.setPixel(10 - i, i);
    }
      display.drawRect(12, 12, 20, 20);
  
      // Fill the rectangle
      display.fillRect(14, 14, 17, 17);
  
      // Draw a line horizontally
      display.drawHorizontalLine(0, 40, 20);
  
      // Draw a line horizontally
      display.drawVerticalLine(40, 0, 20);
  }

//--------------------------------------------------------------------
//  OLED DRAW CIRCLE
//--------------------------------------------------------------------
  
  void drawCircleDemo() {
    for (int i=1; i < 8; i++) {
      display.setColor(WHITE);
      display.drawCircle(32, 32, i*3);
      if (i % 2 == 0) {
        display.setColor(BLACK);
      }
      display.fillCircle(96, 32, 32 - i* 3);
    }
  }

//--------------------------------------------------------------------
//  OLED DRAW PROGRESS BAR
//--------------------------------------------------------------------

  void drawProgressBarDemo(int Value) {
    int progress = Value;
    // draw the progress bar
    display.drawProgressBar(0, 50, 120, 10, progress);
  
    // draw the percentage as String
    display.setTextAlignment(TEXT_ALIGN_CENTER);
    display.drawString(64, 35, String(progress) + "%");
  }

//--------------------------------------------------------------------
//  OLED CLEAR DISPLAY
//--------------------------------------------------------------------

  void oled_clear() {
    display.clear();
  }

//--------------------------------------------------------------------
//  OLED SHOW NEW DATA
//--------------------------------------------------------------------

  void oled_show() {
    display.display();
  }

//--------------------------------------------------------------------
//  OLED DISPLAY KICKER WELCOME MESSAGE
//--------------------------------------------------------------------

  void kicker_logo() {
    // Starting The First Code
    oled_clear();
    drawTextCenter(128/2, 5, 3, "TAKEONE");
    drawTextCenter(128/2, 30, 1, " - T E C H N O L O G Y - ");
    drawTextCenter(128/2, 43, 2, "<< KICKER >>");
    oled_show();
  }

//--------------------------------------------------------------------
//  OLED DISPLAY BATTERY LEVEL
//--------------------------------------------------------------------

  void battery_level_display() {
    // Counting Time
    timetick = millis();

    // Taking Action Based On Time Count
    if(timetick - prevtick >= 5000) 
    {
      prevtick = timetick;
      String BV = String(BATTERY,2);
      String BC = String(CHARGE, 0);
      oled_clear();
      drawTextFlowDemo("Battery Level : " + BV + " V Charge Level : " + BC + "%");
      drawProgressBarDemo(BC.toInt());
      oled_show();
    }
  }