main.go

package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

type Task struct {
	name   string
	points int
}

func main() {
	reader := bufio.NewReader(os.Stdin)
	tasks := []Task{}

	for {
		displayMenu()
		choice := readInput(reader, "Select option")

		switch choice {
		case "1":
			tasks = addTask(reader, tasks)
		case "2":
			displayTasks(tasks)
		case "3":
			total := calculateTotalPoints(tasks)
			displayTotalPoints(total)
		case "4":
			tasks = removeTask(reader, tasks)
		case "5":
			fmt.Println("Exiting program")
			return
		default:
			fmt.Println("Invalid option")
		}
	}
}
func displayMenu() {

	fmt.Println("\n1. Add Task")
	fmt.Println("2. View Tasks")
	fmt.Println("3. View Total Points")
	fmt.Println("4. Remove Task")
	fmt.Println("5. Exit")

	separator()
}

func separator() {
	fmt.Println("\n-----------------------------------\n\n")
}

func readInput(reader *bufio.Reader, prompt string) string {
	fmt.Print(prompt + ": ")
	input, _ := reader.ReadString('\n')
	return strings.TrimSpace(input)
}

func addTask(reader *bufio.Reader, tasks []Task) []Task {
	name := readInput(reader, "Enter task name")
	pointsInput := readInput(reader, "Enter task points")

	points, err := strconv.Atoi(pointsInput)
	if err != nil {
		fmt.Println("Points must be a number")
		return tasks
	}

	newTask := Task{name: name, points: points}
	tasks = append(tasks, newTask)

	fmt.Println("Task added")
	return tasks
}

func displayTasks(tasks []Task) {
	if len(tasks) == 0 {
		fmt.Println("No tasks available")
		return
	}

	for index, task := range tasks {
		fmt.Printf("%d. %s (%d points)\n", index+1, task.name, task.points)
	}
}

func calculateTotalPoints(tasks []Task) int {
	total := 0

	for _, task := range tasks {
		total += task.points
	}

	return total
}

func displayTotalPoints(total int) {
	fmt.Println("Total Points:", total)
}

func removeTask(reader *bufio.Reader, tasks []Task) []Task {
	if len(tasks) == 0 {
		fmt.Println("No tasks to remove")
		return tasks
	}

	displayTasks(tasks)
	indexInput := readInput(reader, "Enter task number to remove")

	index, err := strconv.Atoi(indexInput)
	if err != nil || index < 1 || index > len(tasks) {
		fmt.Println("Invalid selection")
		return tasks
	}

	tasks = append(tasks[:index-1], tasks[index:]...)
	fmt.Println("Task removed")

	return tasks
}