#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

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

// create an OLED display object connected to I2C
Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);


#define BUTTON 13 // PullUP Button
#define SCBUTTON 12 // Second PullUP Button

#include <WiFi.h> // Wifi librairie
#include <HTTPClient.h> // Http Librairie to request GET


// Data to connect on WIFI
const char* ssid = "Wokwi-GUEST";
const char* password = ""; // Empty for WokWi

void setup() {
  Serial.begin(9600);

  // initialize OLED display with I2C address 0x3C
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("failed to start SSD1306 OLED"));
    while (1);
  }

  // Set pinMode for button
  pinMode(BUTTON, INPUT_PULLUP);

  // Set pinMode for second button
  pinMode(SCBUTTON, INPUT_PULLUP);

  // Connect to wifi
  WiFi.mode(WIFI_STA); //Optional
  WiFi.begin(ssid, password);

  // Wait for WiFi
  while(WiFi.status() != WL_CONNECTED){
      Serial.print(".");
      delay(100);
  }

  // Show wifi status
  Serial.println("\nConnected to the WiFi network");
  Serial.print("Local ESP32 IP: ");
  Serial.println(WiFi.localIP());
}

void showOled(String value){
  oled.clearDisplay(); // clear display

  oled.setTextSize(1);         // set text size
  oled.setTextColor(WHITE);    // set text color
  oled.setCursor(0, 2);       // set position to display (x,y)
  oled.println(value); // set text
  oled.display();  
  
}


// Function to send request and return value
String sendRequest(String range){

    // URL to request
    String serverName = "https://guardia-dice.glitch.me/" + range;

    // Get HTTP Client
    HTTPClient http;

    // Begin GET Request with a rand (6 or 20)
    http.begin(serverName.c_str());

    // Get status code of the request
    int httpResponseCode = http.GET();

    // Check url respons
    if(httpResponseCode>0){

      // Get result
      String result = http.getString();

      // Return data if ok
      if(result == "Critical error"){
        // Recurcive method
        return sendRequest(range);

      }else{
        return result;
      }

    }else{

      // Recurcive method
      return sendRequest(range);
    }
}

void loop() {

  // Delay to handle system
  delay(10);

  // Detect when we click on the button
  if(digitalRead(BUTTON) == 0){

    // Send request
    Serial.print("Rolling a 6 sided dice....... ");
    String result = sendRequest("6");

    // Show result
    Serial.println("You got a " + result +" !");
    showOled("You rolled: "+result+" ! ");

    // Delay to avoid spam or second request
    delay(1000);
  }else if(digitalRead(SCBUTTON) == 0){

    // Send request
    Serial.print("Rolling a 20 sided dice....... ");
    String result = sendRequest("20");

    // Show result
    Serial.println("You got a " + result +" !");
    showOled("You rolled: "+result+" ! ");

    // Delay to avoid spam or second request
    delay(1000);
  }
}