package toolcall

import "strings"

func normalizeDSMLToolCallMarkup(text string) (string, bool) {
	if text == "" {
		return "", true
	}
	hasAliasLikeMarkup, _ := ContainsToolMarkupSyntaxOutsideIgnored(text)
	if !hasAliasLikeMarkup {
		return text, true
	}
	return rewriteDSMLToolMarkupOutsideIgnored(text), true
}

func rewriteDSMLToolMarkupOutsideIgnored(text string) string {
	if text == "" {
		return ""
	}
	lower := strings.ToLower(text)
	var b strings.Builder
	b.Grow(len(text))
	for i := 0; i < len(text); {
		next, advanced, blocked := skipXMLIgnoredSection(text, lower, i)
		if blocked {
			b.WriteString(text[i:])
			break
		}
		if advanced {
			b.WriteString(text[i:next])
			i = next
			continue
		}
		tag, ok := scanToolMarkupTagAt(text, i)
		if !ok {
			b.WriteByte(text[i])
			i++
			continue
		}
		if tag.DSMLLike {
			b.WriteByte('<')
			if tag.Closing {
				b.WriteByte('/')
			}
			b.WriteString(tag.Name)
			b.WriteString(text[tag.NameEnd : tag.End+1])
			if text[tag.End] != '>' {
				b.WriteByte('>')
			}
			i = tag.End + 1
			continue
		}
		b.WriteString(text[tag.Start : tag.End+1])
		i = tag.End + 1
	}
	return b.String()
}