package main

import (
	"fmt"
	"os"
	"time"
	//"log"
)

var notas []float64
var num float64
var choice int

func main() {
	fmt.Print("\033[H\033[2J")
	fmt.Printf("Welcome to the vector playground\n\n")

	msg()
	options()
}

func options() {
	for {
		fmt.Scanln(&choice)

		switch choice {
		case 1:
			addVec()
		case 2:
			showResults()
		case 3:
			fmt.Println("Have a nice day!")
			os.Exit(0)
		default:
			fmt.Print("\033[H\033[2J")
			fmt.Printf("[-] ERROR: invalid input\n\n")
			fmt.Printf("[1] Add to vector\n")
			fmt.Printf("[2] View results\n")
			fmt.Printf("[3] Exit\n")
			fmt.Printf("\nPlease, select your choice: ")
		}
	}

}

func msg() {
	fmt.Print("\033[H\033[2J")
	fmt.Printf("[1] Add to vector\n")
	fmt.Printf("[2] View results\n")
	fmt.Printf("[3] Exit\n")

	fmt.Printf("\nPlease, select your choice: ")

}

func addVec() {
	fmt.Print("\033[H\033[2J")
	fmt.Printf("Which number would you like to add to the vector?\nNumber: ")
	fmt.Scanln(&num)
	if num >= 0.001 && num <= 10 {

	} else {
		msg()
		fmt.Println("\nERROR: Invalid number")
		return
	}
	notas = append(notas, num)
	//time.Sleep(2 * time.Second)
	fmt.Printf("You have added the number %v!", num)
	time.Sleep(2 * time.Second)
	msg()
}

func showResults() {
	fmt.Printf("These are your current grades: \n")
	fmt.Print(notas)
	time.Sleep(2 * time.Second)
	msg()
}