#include <WiFi.h>
#include <LiquidCrystal.h>
#include <NTPClient.h>
#include <WiFiUdp.h>
#include <TimeLib.h>
#include <HTTPClient.h>

// Pin definitions
#define LCD_RS  23
#define LCD_EN  19
#define LCD_D4  18
#define LCD_D5  5
#define LCD_D6  4
#define LCD_D7  0

// Time zone offset (example: UTC-5 for EST)
#define TIME_OFFSET 0

// LCD setup (2 rows, 40 characters wide)
LiquidCrystal lcd(LCD_RS, LCD_EN, LCD_D4, LCD_D5, LCD_D6, LCD_D7);

// WiFi credentials
const char* ssid = "yourSSID";
const char* password = "yourPASSWORD";

// NTP client setup
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", TIME_OFFSET * 3600, 86400000); // Update every 24 hours

// Text URL to fetch for row 2
const String textFileURL = "http://ben.lostgeek.net/fclock.txt";

// Variables for fetched text
String currentText = "";

void setup() {
  // Start serial for debugging
  Serial.begin(115200);
  
  // Initialize LCD
  lcd.begin(40, 2); // 40 characters, 2 rows
  lcd.clear();
  
  // Connect to WiFi
  connectToWiFi();
  
  // Start NTP client to get the time
  timeClient.begin();
  
  // Set time based on NTP sync
  timeClient.update();
  setTime(timeClient.getEpochTime());
  
  // Set up LCD display (row 1: date, row 2: text)
  displayDateAndTime();
  fetchText();
  displayText();
}

void loop() {
  // Update time every second
  updateTime();
  
  // Every 5 minutes, fetch the new text
  static unsigned long lastFetchTime = 0;
  if (millis() - lastFetchTime >= 300000) { // 5 minutes
    fetchText();
    displayText();
    lastFetchTime = millis();
  }
  
  delay(1000); // Delay 1 second to update time
}

void connectToWiFi() {
  Serial.println("Connecting to WiFi...");
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Attempting to connect...");
  }
  
  // Get IP address after successful connection
  String ipAddress = WiFi.localIP().toString();
  
  // Display the connection status for 2 seconds
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Connected to");
  lcd.setCursor(0, 1);
  lcd.print(ssid);
  lcd.setCursor(0, 2);
  lcd.print("IP: " + ipAddress);
  delay(2000);  // Show the message for 2 seconds
  
  Serial.println("Connected to WiFi!");
}

void updateTime() {
  timeClient.update();
  setTime(timeClient.getEpochTime());  // Update internal time
  displayDateAndTime();
}

void displayDateAndTime() {
  // Get date and time information
  String formattedDate = getFormattedDate();
  
  // Pad time with leading zeros if needed
  String formattedTime = String(hour() < 10 ? "0" : "") + String(hour()) + ":" + 
                         String(minute() < 10 ? "0" : "") + String(minute()) + ":" + 
                         String(second() < 10 ? "0" : "") + String(second()) + " " + 
                         (hour() >= 12 ? "PM" : "AM");
  
  // Clear row 1 and display formatted date
  lcd.setCursor(0, 0);
  lcd.print("                    ");  // Clear row 1 (40 chars)
  lcd.setCursor(0, 0);
  lcd.print(formattedDate);
  
  // Display time at position 38
  lcd.setCursor(28, 0);
  lcd.print(formattedTime);  // Display time starting from position 38
}

String getFormattedDate() {
  int dayOfWeek = weekday();
  String dayNames[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
  String dayName = dayNames[dayOfWeek - 1];

  int dayOfMonth = day();
  String suffix = getDaySuffix(dayOfMonth);

  String monthNames[] = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
  String monthName = monthNames[month() - 1];

  return dayName + ", " + monthName + " " + String(dayOfMonth) + suffix + "   ";
}

String getDaySuffix(int day) {
  if (day >= 11 && day <= 13) return "th";
  switch (day % 10) {
    case 1: return "st";
    case 2: return "nd";
    case 3: return "rd";
    default: return "th";
  }
}

void fetchText() {
  HTTPClient http;
  http.begin(textFileURL);
  int httpCode = http.GET();

  if (httpCode == HTTP_CODE_OK) {
    currentText = http.getString();
    if (currentText.length() > 40) {
      currentText = currentText.substring(0, 40);  // Truncate if longer than 40 characters
    }
  } else {
    currentText = "Error fetching text";  // Default text in case of error
  }
  http.end();
}

void displayText() {
  // Clear row 2 and display fetched text
  lcd.setCursor(0, 1);
  lcd.print("                    ");  // Clear row 2 (40 chars)
  lcd.setCursor(0, 1);
  lcd.print(currentText);  // Display fetched text
}