package lsproto

import (
	"cmp"
)

// Implements a cmp.Compare like function for two Position
// ComparePositions(pos, other) == cmp.Compare(pos, other)
func ComparePositions(pos, other Position) int {
	if lineComp := cmp.Compare(pos.Line, other.Line); lineComp != 0 {
		return lineComp
	}
	return cmp.Compare(pos.Character, other.Character)
}

// Implements a cmp.Compare like function for two Range
// CompareRanges(lsRange, other) == cmp.Compare(lsRange, other)
//
//	Range.Start is compared before Range.End
func CompareRanges(lsRange, other Range) int {
	if startComp := ComparePositions(lsRange.Start, other.Start); startComp != 0 {
		return startComp
	}
	return ComparePositions(lsRange.End, other.End)
}

// AsString returns the plain text of a StringOrMarkupContent, reading the
// MarkupContent value when the message is not a plain string.
func (m StringOrMarkupContent) AsString() string {
	if m.String != nil {
		return *m.String
	}
	if m.MarkupContent != nil {
		return m.MarkupContent.Value
	}
	return ""
}