package utils

import (
	"os"
)

// Repeats a rune given amount of times and returns the result as a string
func RepeatRune(r rune, times int) (result string) {
	for i := 0; i < times; i++ {
		result += string(r)
	}
	return
}

// Replaces a character inside a string with a given rune at index
//
// Thanks https://stackoverflow.com/a/24894202/12036073
func ReplaceAtIndex(in string, r rune, i int) string {
	out := []rune(in)
	out[i] = r
	return string(out)
}

func TwoDByteArrayToStringArray(in [][]byte) (result []string) {
	for _, v := range in {
		result = append(result, string(v))
	}
	return
}

func AppendToFile(path string, value string) {
	allChatsFile, _ := os.OpenFile(path, os.O_APPEND|os.O_WRONLY, 0644)
	allChatsFile.WriteString(value)
	allChatsFile.Close()
}

func TotalPages(maxSize int, messageAmount int) int {
	return messageAmount / maxSize
}

func Paginate(page int, maxSize int, messages ...string) []string {
	return messages[len(messages)-maxSize*page : len(messages)-maxSize*(page-1)]
}