package textfmt

import "strings"

func timesn(s string, n int) string {
	if n < 0 {
		return ""
	}

	ss := make([]string, n+1)
	return strings.Join(ss, s)
}

func numDigits(n int) int {
	if n == 0 {
		return 1
	}

	var d int
	for n > 0 {
		d++
		n /= 10
	}

	return d
}

func maxLength(names []string) int {
	var m int
	for _, n := range names {
		if len([]rune(n)) > m {
			m = len([]rune(n))
		}
	}

	return m
}

func padRight(s string, n int) string {
	if len([]rune(s)) >= n {
		return s
	}

	n -= len([]rune(s))
	return s + timesn("\u00a0", n)
}

func itemToParagraph(list Entry, itemText Txt, prefix ...string) Entry {
	p := Entry{
		typ:         paragraph,
		wrapWidth:   list.wrapWidth,
		indent:      list.indent,
		indentFirst: list.indentFirst,
	}

	if len(prefix) == 0 {
		p.text = itemText
		return p
	}

	var prefixLength int
	for _, p := range prefix {
		prefixLength += len([]rune(p)) + 1
	}

	var prefixText []Txt
	for _, p := range prefix {
		prefixText = append(prefixText, Text(p))
	}

	p.indent += prefixLength
	p.indentFirst -= prefixLength
	p.text.cat = append(prefixText, itemText)
	return p
}