package saccharine

import (
	"git.maximhutz.com/max/lambda/pkg/codec"
)

// A Codec is a [codec.Codec] that serializes Saccharine expressions.
type Codec struct{}

// Decode parses a string as Saccharine source code. Returns an error
// if it cannot.
func (c Codec) Decode(s string) (Expression, error) {
	tokens, err := scan(s)
	if err != nil {
		return nil, err
	}

	return parse(tokens)
}

// Encode turns a Saccharine expression into a string. Returns an error if it
// cannot.
func (c Codec) Encode(e Expression) (string, error) {
	return stringifyExpression(e), nil
}

var _ codec.Codec[Expression] = (*Codec)(nil)