package main

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

// https://golangr.com/range
// TODO: Create something similar to the array exercise but cleaner and better

var notas []float64
var choice int8
var numToAdd float64
var notaSumada float64

func clear() {
	fmt.Print("\033[H\033[2J")
}

func main() {
	start()
}

func start() {
	clear()
	msg()
	choices()
}

func msg() {
	println("[1] Add grade to vector")
	println("[2] View grades")
	println("[3] Get grade average")
	println("[4] Get min / max grade")
	println("[5] Reset grades")
	println("[6] Exit")
}

func choices() {
	for {
		fmt.Printf("Choice: ")
		fmt.Scan(&choice)
		switch choice {
		case 1:
			addVec()
		case 2:
			viewGrades()
		case 3:
			average()
		case 4:
		case 5:
			resetGrades()
		case 6:
			fmt.Println("Have a nice day")
			os.Exit(0)
		default:
			msg()
			fmt.Println("Another one")
		}
	}
}

func total(num float64) {

}

func average() {
	clear()
	msg()

	for _, elem := range notas {
		notaSumada = notaSumada + elem
	}

	notaMedia := notaSumada / float64(len(notas))
	fmt.Printf("\n-----------------------------------------------")
	fmt.Printf("\nAll your grades combine to %v\n", notaSumada)
	fmt.Printf("Your average grade is %v\n", notaMedia)
	fmt.Printf("-----------------------------------------------\n\n")

	notaSumada = 0
	notaMedia = 0
}

func minmax() {

}

func resetGrades() {
	clear()
	msg()
	fmt.Printf("\n-----------------------------------------------")
	fmt.Printf("\nYour grades have been reset!\n")
	fmt.Printf("-----------------------------------------------\n\n")
	notas = nil
}

func addVec() {
	clear()
	fmt.Println("Add a number to your vector")
	fmt.Printf("Number: ")
	fmt.Scanln(&numToAdd)

	// TODO: get error handling going after initial functionality is done
	// if len(numToAdd) == 0 {
	//
	// } else {
	//
	// }

	notas = append(notas, numToAdd)
	clear()
	msg()
	fmt.Printf("\n-----------------------------------------------")
	fmt.Printf("\nYou have added the number %v\n", numToAdd)
	fmt.Printf("-----------------------------------------------\n\n")

	numToAdd = 0
}

func viewGrades() {
	clear()
	msg()
	fmt.Printf("\n-----------------------------------------------\n")
	fmt.Printf("These are your grades:")
	fmt.Printf("\n-----------------------------------------------\n")
	for _, elem := range notas {
		fmt.Println(elem)
	}
	fmt.Printf("-----------------------------------------------\n\n")
}