/* 
  To test, you need the Wokwi IoT Gateway, as explained here:

  https://docs.wokwi.com/guides/esp32-wifi#the-private-gateway

  Then start the simulation, and open http://localhost:9080
  in another browser tab.

  Note that the IoT Gateway requires a Wokwi Club subscription.
  To purchase a Wokwi Club subscription, go to https://wokwi.com/club
*/

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
// Font
#include <Fonts/FreeMonoBold12pt7b.h>


// #include <Arduino.h>
#ifdef ESP32
  // #include "../libraries/WiFi"
  #include <WiFi.h>
  // #include "../libraries/AsyncTCP"
  #include <AsyncTCP.h>
#elif defined(ESP8266)
  // #include "../libraries/ESP8266WiFi"
  #include <ESP8266WiFi.h>
  // #include "../libraries/ESPAsyncTCP"
  #include <ESPAsyncTCP.h>
#endif
// #include "../libraries/ESPAsyncWebServer"
// #include <ESPAsyncWebServer.h>
// #include "index.h"


/* =========================

  You can choose any font you want from:

  FreeMono12pt7b.h		            FreeSansBoldOblique12pt7b.h
  FreeMono18pt7b.h		            FreeSansBoldOblique18pt7b.h
  FreeMono24pt7b.h		            FreeSansBoldOblique24pt7b.h
  FreeMono9pt7b.h			            FreeSansBoldOblique9pt7b.h
  FreeMonoBold12pt7b.h		        FreeSansOblique12pt7b.h
  FreeMonoBold18pt7b.h		        FreeSansOblique18pt7b.h
  FreeMonoBold24pt7b.h		        FreeSansOblique24pt7b.h
  FreeMonoBold9pt7b.h		          FreeSansOblique9pt7b.h
  FreeMonoBoldOblique12pt7b.h	    FreeSerif12pt7b.h
  FreeMonoBoldOblique18pt7b.h	    FreeSerif18pt7b.h
  FreeMonoBoldOblique24pt7b.h	    FreeSerif24pt7b.h
  FreeMonoBoldOblique9pt7b.h	    FreeSerif9pt7b.h
  FreeMonoOblique12pt7b.h		      FreeSerifBold12pt7b.h
  FreeMonoOblique18pt7b.h		      FreeSerifBold18pt7b.h
  FreeMonoOblique24pt7b.h		      FreeSerifBold24pt7b.h
  FreeMonoOblique9pt7b.h		      FreeSerifBold9pt7b.h
  FreeSans12pt7b.h		            FreeSerifBoldItalic12pt7b.h
  FreeSans18pt7b.h		            FreeSerifBoldItalic18pt7b.h
  FreeSans24pt7b.h		            FreeSerifBoldItalic24pt7b.h
  FreeSans9pt7b.h			            FreeSerifBoldItalic9pt7b.h
  FreeSansBold12pt7b.h		        FreeSerifItalic12pt7b.h
  FreeSansBold18pt7b.h		        FreeSerifItalic18pt7b.h
  FreeSansBold24pt7b.h		        FreeSerifItalic24pt7b.h
  FreeSansBold9pt7b.h		          FreeSerifItalic9pt7b.h

============================ */

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

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)

// Setup own Router AP connection
const char* ssid = "********";
const char* password = "********";

// Adafruit Object
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

// Web Server
// Initializate the server
AsyncWebServer server(80);

int second = 0;
char ssecond[5];
int minute = 0;
char sminute[5];

char all[10];


void setup() {
  Serial.begin(115200);

  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }
  delay(2000);

  display.setFont(&FreeMonoBold12pt7b);
  display.clearDisplay();

  display.setTextSize(1);
  display.setTextColor(WHITE);
  
  // Display text
  textCenter("00:00");
}


void loop() {
  second++;
  if(second > 60){
    second = 0;
    minute ++;
  }

  // Convert 123 to string [buf]
  itoa(second, ssecond, 10);
  itoa(minute, sminute, 10);

  strcat( all, minute );
  strcat( all, second );

  textCenter(all);
  delay(100);
}


/* ===========================
  Center the text
============================= */
void textCenter(String text) {
  int16_t x1;
  int16_t y1;
  uint16_t width;
  uint16_t height;

  display.getTextBounds(text, 0, 0, &x1, &y1, &width, &height);

  // display on horizontal and vertical center
  display.clearDisplay(); // clear display
  display.setCursor((SCREEN_WIDTH - width) / 2, (SCREEN_HEIGHT - height) / 2);
  display.println(text); // text to display
  display.display();
}