#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Fonts/FreeSansBold18pt7b.h>

#define OLED_SDA 4
#define OLED_SCL 15 
#define OLED_RST 16

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RST);

//wifi icon size: 20W*15H px
const unsigned char wifi_icon [] PROGMEM = {
0x07, 0xc0, 0x1f, 0xf0, 0x7c, 0x7c, 0x70, 0x1c, 
0xc0, 0x06, 0xc3, 0x86, 0x0f, 0xe0, 0x1c, 0x70,
0x18, 0x30, 0x00, 0x00, 0x03, 0x80, 0x03, 0x80
};
void setup() {
  Serial.begin(115200);
  pinMode(LED_BUILTIN, OUTPUT);

  //reset OLED display via software
  pinMode(OLED_RST, OUTPUT);
  digitalWrite(OLED_RST, LOW);
  delay(20);
  digitalWrite(OLED_RST, HIGH);

  //initialize OLED
  Wire.begin(OLED_SDA, OLED_SCL);
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3c, false, false)) { // Address 0x3C for 128x32
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
  
  display.clearDisplay();

  display.setTextColor(WHITE);
  display.setTextSize(1);
  display.setCursor(0,0);
  display.print("WIFI");
  display.setCursor(0,10);
  display.print("PWR");

  display.drawRect(40, 9, display.width()-40, 10, WHITE);
  display.fillRect(40, 9, 50 , 10, WHITE);
  display.setCursor(0,20);
  display.print("Button");
  display.drawCircle(48,24, 4, WHITE);
  display.drawCircle(60,24, 4, WHITE);

  display.drawBitmap(113, 50, wifi_icon, 15, 12, 1);

  display.display();
  
  Serial.println("LoRa Sender Test");

  delay(2000);
digitalWrite(LED_BUILTIN, LOW);
}

void loop() {
  
  display.fillCircle(48,24, 3, WHITE);
  display.fillCircle(60,24, 3, INVERSE);

  Serial.println("ON");
 display.display();
  delay(2000);
  display.fillCircle(48,24, 3, INVERSE);
  display.fillCircle(60,24, 3, WHITE );
  
  Serial.println("OFF");
 display.display();
  delay(2000);
  
}


void drawBatteryIndicator(int percentage) {
 // Draw battery outline
 display.drawRect(110, 0, 18, 10, WHITE);

 // Calculate the width of the battery indicator based on the percentage
 int batteryWidth = map(percentage, 0, 100, 0, 16);

 // Draw filled battery indicator
 display.fillRect(112, 2, batteryWidth, 6, WHITE);
}