package cache

import (
	"os"
	"path/filepath"

	"go.alanpearce.eu/homestead/internal/file"
)

var home string
var Root *os.Root

func init() {
	var err error
	home, err = os.UserCacheDir()
	if err != nil {
		panic("could not determine user cache directory: " + err.Error())
	}

	dir := filepath.Join(home, "homestead")

	if !file.Exists(dir) {
		err = os.MkdirAll(dir, 0o750)
		if err != nil {
			panic("could not create cache sub-directory: " + err.Error())
		}
	}

	Root, err = os.OpenRoot(dir)
	if err != nil {
		panic("could not open cache sub-directory: " + err.Error())
	}
}

func JoinPath(path string) string {
	return filepath.Join(Root.Name(), path)
}