#include <GxEPD2_BW.h> // Include the library for e-paper display
#include <U8g2_for_Adafruit_GFX.h> // Include the library for fonts and graphics

#define MAX_DISPLAY_BUFFER_SIZE 800 // Define the maximum display buffer size
#define MAX_HEIGHT(EPD) (EPD::HEIGHT <= MAX_DISPLAY_BUFFER_SIZE / (EPD::WIDTH / 8) ? EPD::HEIGHT : MAX_DISPLAY_BUFFER_SIZE / (EPD::WIDTH / 8)) // Define the maximum height

GxEPD2_BW<GxEPD2_290, MAX_HEIGHT(GxEPD2_290)> display(GxEPD2_290(/*CS=*/ 10, /*DC=*/ 9, /*RST=*/ 8, /*BUSY=*/ 7)); // Create a display object with pin connections

U8G2_FOR_ADAFRUIT_GFX u8g2Fonts; // Create a font object

void setup() {
  Serial.begin(9600); // Start serial communication
  display.init(); // Initialize the display
  u8g2Fonts.begin(display); // Connect the font object to the display object
  u8g2Fonts.setFontMode(1); // Use transparent mode for the fonts
  u8g2Fonts.setFontDirection(0); // Set the font direction to horizontal
  u8g2Fonts.setForegroundColor(GxEPD_BLACK); // Set the font color to black
  u8g2Fonts.setBackgroundColor(GxEPD_WHITE); // Set the background color to 
}

void loop() {
  //display.setFullWindow(); // Set the full window mode
  //display.firstPage(); // Start the first page
  //do {
  //  drawText(); // Draw the text on the display
  //}
  //while (display.nextPage()); // Update the display until all pages are done
  //delay(10000); // Wait for 10 seconds
  
  u8g2Fonts.setFont(u8g2_font_helvB18_tf); // Set the font to Helvetica Bold 18
  u8g2Fonts.setCursor(0, 30); // Set the cursor to the top left corner
  u8g2Fonts.println("asdf");
  Serial.println("asdf");
}

void drawText() {
  u8g2Fonts.setFont(u8g2_font_helvB18_tf); // Set the font to Helvetica Bold 18
  u8g2Fonts.setCursor(0, 30); // Set the cursor to the top left corner
  u8g2Fonts.println("Hello, world!"); // Print "Hello, world!" on the first line
  u8g2Fonts.setFont(u8g2_font_helvB12_tf); // Set the font to Helvetica Bold 12
  u8g2Fonts.setCursor(0, 60); // Set the cursor to the second line
  u8g2Fonts.println("This is an e-paper display"); // Print "This is an e-paper display" on the second line
  u8g2Fonts.setCursor(0, 90); // Set the cursor to the third line
  u8g2Fonts.println("It can show black and white images"); // Print "It can show black and white images" on the third line
  u8g2Fonts.setCursor(0, 120); // Set the cursor to the fourth line
  u8g2Fonts.println("It has low power consumption"); // Print "It has low power consumption" on the fourth line
  u8g2Fonts.setCursor(0, 150); // Set the cursor to the fifth line
  u8g2Fonts.println("It can retain the image even without power"); // Print "It can retain the image even without power" on the fifth line
}