TaskManager.java

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class TaskManager {
    private List<Task> tasks = new ArrayList<>();
    private Scanner scanner = new Scanner(System.in);

    public void addTask() {
        System.out.print("Enter Task Title: ");
        String title = scanner.nextLine();

        System.out.print("Enter Task Description: ");
        String description = scanner.nextLine();

        System.out.print("Enter Priority (LOW, MEDIUM, HIGH): ");
        String priority = scanner.nextLine().toUpperCase();

        System.out.print("Enter Deadline (yyyy-mm-dd): ");
        String deadline = scanner.nextLine();

        Task task = new Task(title, description, priority, deadline);
        tasks.add(task);
        System.out.println("Task added successfully!");
    }

    public void editTask() {
        System.out.print("Enter Task Title to Edit: ");
        String title = scanner.nextLine();
        Task task = findTask(title);

        if (task != null) {
            System.out.print("Enter new Title: ");
            task.setTitle(scanner.nextLine());

            System.out.print("Enter new Description: ");
            task.setDescription(scanner.nextLine());

            System.out.print("Enter new Priority (LOW, MEDIUM, HIGH): ");
            task.setPriority(scanner.nextLine().toUpperCase());

            System.out.print("Enter new Deadline (yyyy-mm-dd): ");
            task.setDeadline(scanner.nextLine());

            System.out.println("Task updated successfully!");
        } else {
            System.out.println("Task not found.");
        }
    }

    public void deleteTask() {
        System.out.print("Enter Task Title to Delete: ");
        String title = scanner.nextLine();
        Task task = findTask(title);

        if (task != null) {
            tasks.remove(task);
            System.out.println("Task deleted successfully!");
        } else {
            System.out.println("Task not found.");
        }
    }

    public void markTaskCompleted() {
        System.out.print("Enter Task Title to Mark as Completed: ");
        String title = scanner.nextLine();
        Task task = findTask(title);

        if (task != null) {
            task.setCompleted(true);
            System.out.println("Task marked as completed!");
        } else {
            System.out.println("Task not found.");
        }
    }

    public void trackTaskProgress() {
        System.out.print("Enter Task Title to Track Progress: ");
        String title = scanner.nextLine();
        Task task = findTask(title);

        if (task != null) {
            System.out.print("Enter progress increment (10, 20, etc.): ");
            int increment = scanner.nextInt();
            scanner.nextLine(); // consume newline
            task.showProgress(increment);
        } else {
            System.out.println("Task not found.");
        }
    }

    public void viewTasks() {
        if (tasks.isEmpty()) {
            System.out.println("No tasks available.");
            return;
        }

        for (Task task : tasks) {
            System.out.println(task);
            System.out.println("------------------------------");
        }
    }

    private Task findTask(String title) {
        for (Task task : tasks) {
            if (task.getTitle().equalsIgnoreCase(title)) {
                return task;
            }
        }
        return null;
    }
}