import java.io.*; import java.util.Scanner;

public class FileManager {

// Write content to a text file
public static void writeToFile(String fileName, String content) {
    try (BufferedWriter writer = new BufferedWriter(new FileWriter(fileName))) {
        writer.write(content);
        System.out.println("✅ FILE HAS BEEN WRITTEN SUCCESSFULLY.");
    } catch (IOException e) {
        System.out.println("❌ ERROR WHILE WRITING TO FILE: " + e.getMessage());
    }
}

// Read content from a text file
public static void readFromFile(String fileName) {
    try (BufferedReader reader = new BufferedReader(new FileReader(fileName))) {
        System.out.println("📄 FILE CONTENT:");
        String line;
        while ((line = reader.readLine()) != null) {
            System.out.println("  " + line);
        }
    } catch (IOException e) {
        System.out.println("❌ ERROR WHILE READING THE FILE: " + e.getMessage());
    }
}

// Append content to a text file
public static void appendToFile(String fileName, String content) {
    try (BufferedWriter writer = new BufferedWriter(new FileWriter(fileName, true))) {
        writer.newLine();
        writer.write(content);
        System.out.println("✏️ FILE HAS BEEN MODIFIED SUCCESSFULLY.");
    } catch (IOException e) {
        System.out.println("❌ ERROR WHILE MODIFYING FILE: " + e.getMessage());
    }
}

public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String fileName = "Internship_Task_2.txt";  // 🔄 UPDATED FILE NAME

    System.out.println("\n📁 SIMPLE FILE OPERATIONS IN JAVA");
    System.out.println("1. WRITE TO FILE");
    System.out.println("2. READ FROM FILE");
    System.out.println("3. APPEND TO FILE");
    System.out.print("👉 ENTER YOUR CHOICE: ");
    int choice = sc.nextInt();
    sc.nextLine(); // consume newline

    switch (choice) {
        case 1:
            System.out.print("✍️ ENTER TEXT TO WRITE: ");
            String writeText = sc.nextLine();
            writeToFile(fileName, writeText);
            break;

        case 2:
            readFromFile(fileName);
            break;

        case 3:
            System.out.print("➕ ENTER TEXT TO APPEND: ");
            String appendText = sc.nextLine();
            appendToFile(fileName, appendText);
            break;

        default:
            System.out.println("❗ INVALID CHOICE. PLEASE TRY AGAIN.");
    }

    sc.close();
}

}