package util

import (
	"io"
	"io/fs"
	"log"
	"os"
	"strings"

	"gopkg.in/yaml.v2"
)

func DefaultAssets() (fs.FS, error) {
	rootFS, err := os.OpenRoot("assets")
	if err != nil {
		return nil, err
	}
	return rootFS.FS(), nil
}

func ReadBytes(assetFS fs.FS, name string) ([]byte, error) {
	f, err := assetFS.Open(name)
	if err != nil {
		return nil, err
	}
	defer f.Close()
	return io.ReadAll(f)
}

func ReadString(assetFS fs.FS, name string) (string, error) {
	b, err := ReadBytes(assetFS, name)
	if err != nil {
		return "", err
	}
	return strings.TrimSpace(string(b)), nil
}

func ReadYAML(assetFS fs.FS, name string, out any) error {
	log.Printf("ASSET: Read YAML %s", name)
	f, err := assetFS.Open(name)
	if err != nil {
		return err
	}
	defer f.Close()
	return yaml.NewDecoder(f).Decode(out)
}