// Learn about the ESP32 WiFi simulation in
// https://docs.wokwi.com/guides/esp32-wifi

#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

String domain = "CSProbot";

/* Setup IP for ESP32 */
IPAddress localip(192,168,3,20);
IPAddress gateway(192,168,3,1);
IPAddress subnet(255,255,255,0);
IPAddress IP;

LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27, 16, 2);

/* Setup SSID and Password */
const char *ssid = "ESP32";
const char *pass = "0123456789";

//----------BUTTONS----------
#define BUTTON1_pin 5
#define BUTTON2_pin 4
/* Initial state */
int button1_state = HIGH;
int button2_state = HIGH;
int button1_press = LOW;
int button2_press = LOW;

unsigned long B1DebounceTime = 0;
unsigned long B2DebounceTime = 0;
unsigned long debounceTime = 50;

void initLCD();
void displayText(int column, int row, String str);
void transWiFi();

void setup() {
  Serial.begin(115200);
  /* Declare GPIO pins for buttons */
  pinMode(BUTTON1_pin, INPUT_PULLUP);
  pinMode(BUTTON2_pin, INPUT_PULLUP);
  /* Initialize LCD screen */
  initLCD();
  /* Transmit WiFi */
  transWiFi();     
  /* Get IP address */
  IP = WiFi.softAPIP();
  Serial.println("IP:" + IP.toString());
  
  

  /* Press button 1 to see SSID and Password */
  /* Press button 2 to see IP address and domain */
  
}

void loop() {
  unsigned long currentMillis = millis();
  bool button1Read = digitalRead(BUTTON1_pin);
  bool button2Read = digitalRead(BUTTON2_pin);

  /* check button 1 */
  if (button1Read != button1_state){
    B1DebounceTime = currentMillis;
  }
  if ((currentMillis - B1DebounceTime) >= debounceTime){
    if (!(digitalRead(BUTTON1_pin))){
    lcd.clear();
    displayText(0,0,"SSID:");
    displayText(6,0,String(ssid));
    displayText(0,1,"PASS:");
    displayText(6,1,String(pass));
    delay(500);
  }
  }

  /* check button 2 */
  if (button2Read != button2_state){
    B2DebounceTime = currentMillis;
  }
  if ((currentMillis - B2DebounceTime) >= debounceTime){
    if (!(digitalRead(BUTTON2_pin))){
    lcd.clear();
    displayText(0,0,"IP:");
    displayText(4,0,IP.toString());
    displayText(0,1,"Host:");
    displayText(6,1,String(domain));
    delay(500);
  }
  }
}

void transWiFi(){
  WiFi.mode(WIFI_AP);
  WiFi.softAP(ssid, pass);
  WiFi.softAPConfig(localip, gateway, subnet);

  /*
   * *WiFi.softAP(const char *ssid, const char *pass, int channel, int ssid_hidden, int max_connection);
   * ssid: name for the access point
   * pass: password for the ssid that you want the access point to be open
   * channel: wifi channel number (1-13, in some cases, channel 12 & 13 'll not be available
   * ssid_hidden: 0 = broadcast SSID, 1 = hide SSID
   * max_connection: maximum simultaneous connected clients (1-4)
   */
  
  /* Print on serial screen */
  Serial.println("ACCESS POINT");
  Serial.println("SSID:" + String(ssid));
  Serial.println("PASS:" + String(pass));
}

//--------------------------------------------------
void initLCD(){
  lcd.init();
  lcd.clear();         // Xóa màn hình
  lcd.backlight();     // Bật đèn nền
  lcd.setCursor(0,0);  // Đưa con trỏ về vị trí hàng 0, cột 0
}

//--------------------------------------------------
void displayText(int column, int row, String str){
  lcd.setCursor(column, row);
  lcd.print(str);
}