#include "WiFi.h"
#include <LiquidCrystal_I2C.h>
#include <time.h>

/*ID-ing the LCD*/
LiquidCrystal_I2C LCD=LiquidCrystal_I2C(0x27,16,4);
/*Wifi SSID/Pass*/
String password;
String ssid;
/*Setup the NTP connection*/
const char* ntpServer = "pool.ntp.org";
const long gwtOffset_sec = 10800;
const int daylightOffset_sec = 0;
void printLocalTime(){
  struct tm timeinfo;
  if(!getLocalTime(&timeinfo)){
    Serial.println("Failed to obtain time");
    return;
  }
  Serial.println(&timeinfo, "%A, %B %d %Y %H:%M:%S");
  LCD.setCursor(0,0);
  LCD.print(&timeinfo, "%A");
  LCD.setCursor(0,1);
  LCD.print(&timeinfo, "%B %d %Y");
  LCD.setCursor(0,2);
  LCD.print(&timeinfo, "%H:%M:%S");
}
void wifiScan(){
  if (WiFi.status() == WL_CONNECTED) {
    return;
  }
  LCD.print("scan start");
  for (int i = 0 ; i < 6 ; i++ ){
    delay(100);
    LCD.print(".");
  }
  Serial.println("scan start");
  // WiFi.scanNetworks will return the number of networks found
  int n = WiFi.scanNetworks();
  delay(100);
  LCD.clear();
  LCD.print("scan done");
  Serial.println("scan done");
  delay(1000);
  LCD.clear();

  if (n == 0) {
      LCD.print("no networks found");
      Serial.println("no networks found");
  } else {
    Serial.print(n);
    LCD.print(n);
    LCD.print(" networks found");
    Serial.println(" networks found");
    delay(1000);
    LCD.clear();
    for (int i = 0; i < n; ++i) {
      // Print SSID and RSSI for each network found
      Serial.print(i + 1);
      Serial.print(": ");
      Serial.print(WiFi.SSID(i));
      Serial.print(" (");
      Serial.print(WiFi.RSSI(i));
      Serial.print(")");
      Serial.println((WiFi.encryptionType(i) == WIFI_AUTH_OPEN)?" ":"*");

      delay(10);
    }
  }
  Serial.println("\nWhat Network would you like to join?");
  int i = 0;
  int menuChoice;
  String respond;
  while(respond != "next"){

    LCD.print("Select WIFI:");
    LCD.setCursor(0,1);
    LCD.print(i + 1);
    LCD.print(": ");
    LCD.print(WiFi.SSID(i));
    LCD.setCursor(0,2);
    LCD.print(i + 2);
    LCD.print(": ");
    LCD.print(WiFi.SSID(i + 1));
    LCD.setCursor(14,3);
    LCD.print("Next >");

    while (Serial.available() == 0) {
  }

    String respond = Serial.readString();
    respond.trim();
    Serial.println(respond);
 
    if (respond == "next") {
      i = i + 2;
      if(i >= n){
        i = 0;
      }
      LCD.clear();
    }
    else {
      menuChoice = respond.toInt();
      LCD.clear();
      break;
    }
  }
  
  ssid = WiFi.SSID(menuChoice - 1);

  Serial.println(ssid);


  if(WiFi.encryptionType(menuChoice - 1) == 0){
    password = "";
  }
  else {
    LCD.print("Enter Password For");
    LCD.setCursor(0,1);
    LCD.print(ssid);
    LCD.print(":");
    Serial.println("Please enter your password: ");

     while(Serial.available() == 0){
  }
    password = Serial.readString();
  }
  

  WiFi.begin(ssid,password);
  LCD.clear();
  LCD.print("Connecting to ");
  LCD.setCursor(0,1);
  LCD.print(ssid);
  Serial.print("Connecting to WiFi");
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }
  LCD.clear();
  LCD.print("Connected!!");
  delay(1000);
  LCD.clear();
  Serial.println("\nConnected to WiFi");


  // Wait a bit before scanning again
  delay(5000);
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  // Set WiFi to station mode and disconnect from an AP if it was previously connected
  LCD.init();
  LCD.backlight();
  WiFi.mode(WIFI_STA);
  WiFi.disconnect();
  wifiScan();
  configTime(gwtOffset_sec ,daylightOffset_sec ,ntpServer );
  printLocalTime();
  delay(100);
  Serial.println("Setup done");
}

void loop() {
 printLocalTime();
}