package main

import (
	"fmt"
	"github.com/dariubs/percent"
	"strings"
)

var alphabet = []rune{
	'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
	'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
}

func letterCount(inputText string) {
	count := make([]int, len(alphabet))
	frequency := make([]float64, len(alphabet))
	totalCount := 0
	for index, letter := range alphabet {
		count[index] = strings.Count(inputText, string(letter))
		count[index] += strings.Count(inputText, string(letter+32))
		totalCount += count[index]
	}
	for index := range alphabet {
		frequency[index] = percent.PercentOf(count[index], totalCount)
	}
	for index, letter := range alphabet {
		fmt.Printf("The letter %c (%c) occurs %d times in the text and the frequency in percent is %0.2f\n", letter, letter+32, count[index], frequency[index])
	}
}

func main() {
	letterCount("This is a test to check for something.Zz")
}