// Copyright © 2017 Ethan Frey
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package cmd

import (
	"path/filepath"

	"github.com/spf13/cobra"
	"github.com/spf13/viper"
	keys "github.com/tendermint/go-crypto/keys"
	"github.com/tendermint/go-crypto/keys/cryptostore"
	"github.com/tendermint/go-crypto/keys/storage/filestorage"
	"github.com/tendermint/tmlibs/cli"
)

const KeySubdir = "keys"

var (
	manager keys.Manager
)

// RootCmd represents the base command when called without any subcommands
var RootCmd = &cobra.Command{
	Use:   "keys",
	Short: "Key manager for tendermint clients",
	Long: `Keys allows you to manage your local keystore for tendermint.

These keys may be in any format supported by go-crypto and can be
used by light-clients, full nodes, or any other application that
needs to sign with a private key.`,
}

// GetKeyManager initializes a key manager based on the configuration
func GetKeyManager() keys.Manager {
	if manager == nil {
		// store the keys directory
		rootDir := viper.GetString(cli.HomeFlag)
		keyDir := filepath.Join(rootDir, KeySubdir)
		// and construct the key manager
		manager = cryptostore.New(
			cryptostore.SecretBox,
			filestorage.New(keyDir),
		)
	}
	return manager
}