package daemon

import (
	"errors"
	"fmt"
	"io/fs"
	"os"
	"path/filepath"

	"isle/bootstrap"
)

func loadHostBootstrap(stateDirPath string) (bootstrap.Bootstrap, error) {
	path := bootstrap.StateDirPath(stateDirPath)

	hostBootstrap, err := bootstrap.FromFile(path)
	if errors.Is(err, fs.ErrNotExist) {
		return bootstrap.Bootstrap{}, fmt.Errorf(
			"%q not found, has the daemon ever been run?",
			stateDirPath,
		)

	} else if err != nil {
		return bootstrap.Bootstrap{}, fmt.Errorf("loading %q: %w", stateDirPath, err)
	}

	return hostBootstrap, nil
}

func writeBootstrapToStateDir(
	stateDirPath string, hostBootstrap bootstrap.Bootstrap,
) error {
	var (
		path    = bootstrap.StateDirPath(stateDirPath)
		dirPath = filepath.Dir(path)
	)

	if err := os.MkdirAll(dirPath, 0700); err != nil {
		return fmt.Errorf("creating directory %q: %w", dirPath, err)
	}

	f, err := os.Create(path)
	if err != nil {
		return fmt.Errorf("creating file %q: %w", path, err)
	}

	defer f.Close()

	return hostBootstrap.WriteTo(f)
}