package topdata

import "strings"

func normalizePreservedSectionBodies(content string) string {
	var out strings.Builder
	offset := 0
	for {
		startRel := strings.Index(content[offset:], manualStartMarkerPrefix)
		if startRel < 0 {
			out.WriteString(content[offset:])
			break
		}
		start := offset + startRel
		startEndRel := strings.Index(content[start:], "-->")
		if startEndRel < 0 {
			out.WriteString(content[offset:])
			break
		}
		startMarker := content[start : start+startEndRel+len("-->")]
		id := markerID(startMarker)
		if id == "" {
			out.WriteString(content[offset : start+len(startMarker)])
			offset = start + len(startMarker)
			continue
		}
		endPrefix := manualEndMarkerPrefix + " id=\"" + id + "\""
		endRel := strings.Index(content[start+len(startMarker):], endPrefix)
		if endRel < 0 {
			out.WriteString(content[offset:])
			break
		}
		end := start + len(startMarker) + endRel
		endEndRel := strings.Index(content[end:], "-->")
		if endEndRel < 0 {
			out.WriteString(content[offset:])
			break
		}
		endMarker := content[end : end+endEndRel+len("-->")]
		out.WriteString(content[offset:start])
		out.WriteString(startMarker)
		out.WriteString("\n<!-- preserved-section-body -->\n")
		out.WriteString(endMarker)
		offset = end + len(endMarker)
	}
	return out.String()
}

func defaultWikiManualSections() []wikiManualSection {
	return []wikiManualSection{
		{ID: "user_top", Alias: "UserTopSection", Heading: "", InitialHTML: "<p></p>"},
		{ID: "notes", Alias: "UserBottomSection", Heading: "Notes", InitialHTML: "<h2>Notes</h2><p></p>"},
		{ID: "see_also", Heading: "See Also", InitialHTML: "<h2>See Also</h2><p></p>"},
	}
}