var ErrShutdown = errors.New("connection is shut down")

type Args struct {
	// The input source.
	Source string

	// The URL of the Source.
	// Leave empty if it's unknown.
	// Must include a scheme, e.g. 'file:///myproject/main.scss'
	// See https://en.wikipedia.org/wiki/File_URI_scheme
	//
	// Note: There is an open issue for this value when combined with custom
	// importers, see https://github.com/sass/dart-sass-embedded/issues/24
	URL string

	// Defaults is SCSS.
	SourceSyntax SourceSyntax

	// Default is EXPANDED.
	OutputStyle OutputStyle

	// If enabled, a sourcemap will be generated and returned in Result.
	EnableSourceMap bool

	// Custom resolver to use to resolve imports.
	// If set, this will be the first in the resolver chain.
	ImportResolver ImportResolver

	// Additional file paths to uses to resolve imports.
	IncludePaths []string
	// contains filtered or unexported fields
}

type ImportResolver interface {
	CanonicalizeURL(url string) (string, error)
	Load(canonicalizedURL string) (string, error)
}

type Options struct {
	// The path to the Dart Sass wrapper binary, an absolute filename
	// if not in $PATH.
	// If this is not set, we will try 'dart-sass-embedded'
	// (or 'dart-sass-embedded.bat' on Windows) in the OS $PATH.
	// There may be several ways to install this, one would be to
	// download it from here: https://github.com/sass/dart-sass-embedded/releases
	DartSassEmbeddedFilename string

	// Timeout is the duration allowed for dart sass to transpile.
	// This was added for the beta6 version of Dart Sass Protocol,
	// as running this code against the beta5 binary would hang
	// on Execute.
	Timeout time.Duration
}

type OutputStyle string

const (
	// Expanded (default) output.
	// Note that LibSASS and Ruby SASS have more output styles, and their
	// default is NESTED.
	OutputStyleExpanded OutputStyle = "EXPANDED"

	// Compressed/minified output.
	OutputStyleCompressed OutputStyle = "COMPRESSED"
)

type Result struct {
	CSS       string
	SourceMap string
}

type SassError struct {
	Message string `json:"message"`
	Span    struct {
		Text  string `json:"text"`
		Start struct {
			Offset int `json:"offset"`
			Column int `json:"column"`
		} `json:"start"`
		End struct {
			Offset int `json:"offset"`
			Column int `json:"column"`
		} `json:"end"`
		Url     string `json:"url"`
		Context string `json:"context"`
	} `json:"span"`
}

type SourceSyntax string

const (
	// SCSS style source syntax (default).
	SourceSyntaxSCSS SourceSyntax = "SCSS"

	// Indented or SASS style source syntax.
	SourceSyntaxSASS SourceSyntax = "INDENTED"

	// Regular CSS source syntax.
	SourceSyntaxCSS SourceSyntax = "CSS"
)

type Transpiler struct {
	// contains filtered or unexported fields
}