package cfg

import (
	"os"
	"path/filepath"

	"github.com/go-errors/errors"
	"github.com/ilyakaznacheev/cleanenv"

	"gensokyo.cafe/xmnt/util"
)

type CfgDef struct {
	CredentialStore []string `yaml:"credential_store" env-default:"$HOME/.vault2/data_encryption"`
}

func (c *CfgDef) expand() {
	for i, path := range c.CredentialStore {
		c.CredentialStore[i] = os.ExpandEnv(path)
	}
}

var Cfg *CfgDef

func LoadAuto() error {
	loc, err := os.UserConfigDir()
	if err != nil {
		return errors.WrapPrefix(err, "cannot obtain user config dir", 0)
	}
	path := filepath.Join(loc, "xmnt", "xmnt.yml")

	loadFromFile, err := util.FileExists(path)
	if err != nil {
		return errors.WrapPrefix(err, "cannot read config file", 0)
	}

	cfg := &CfgDef{}
	if loadFromFile {
		if err = cleanenv.ReadConfig(path, cfg); err != nil {
			return errors.WrapPrefix(err, "cannot read config file", 0)
		}
	} else {
		if err = cleanenv.ReadEnv(cfg); err != nil {
			return errors.WrapPrefix(err, "cannot read config from env", 0)
		}
	}

	cfg.expand()
	Cfg = cfg
	return nil
}