// Copyright (C) 2022 Marius Schellenberger

package parse

import (
	"cachefs/pkg/provider"
	"cachefs/pkg/provider/mount"
	"errors"
	"fmt"
	neturl "net/url"
	"path/filepath"
)

var (
	ErrPathNotAbsolute   = errors.New("path is not absolute")
	ErrUnsupportedScheme = errors.New("unsupported scheme")
)

func FS(url string) (provider.FS, error) {
	u, err := neturl.Parse(url)
	if err != nil {
		return nil, err
	}
	if !filepath.IsAbs(u.Path) {
		return nil, ErrPathNotAbsolute
	}
	switch u.Scheme {
	case "file":
		return mount.NewFS(u.Path), nil
		//case "sftp":
		//	return sftp.FS(u.Path), nil
	}
	return nil, fmt.Errorf("%w: %s", ErrUnsupportedScheme, u.Scheme)
}