type Options struct {
	// Default is nested.
	OutputStyle OutputStyle

	// Precision of floating point math.
	Precision int

	// File paths to use to resolve imports.
	IncludePaths []string

	// ImportResolver can be used to supply a custom import resolver, both to redirect
	// to another URL or to return the body.
	ImportResolver func(url string, prev string) (newURL string, body string, resolved bool)

	// Used to indicate "old style" SASS for the input stream.
	SassSyntax bool

	SourceMapOptions SourceMapOptions
}

type OutputStyle int

const (
	NestedStyle OutputStyle = iota
	ExpandedStyle
	CompactStyle
	CompressedStyle
)

type Result struct {
	CSS string

	// If source maps are configured.
	SourceMapFilename string
	SourceMapContent  string
}

type SourceMapOptions struct {
	Filename       string
	Root           string
	InputPath      string
	OutputPath     string
	Contents       bool
	OmitURL        bool
	EnableEmbedded bool
}

type Transpiler interface {
	Execute(src string) (Result, error)
}