package cmd

import (
	"bytes"
	"fmt"
	"log"
	"os"

	"gitea.nehmer.net/torben/dyndns/service"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
	"golang.org/x/crypto/bcrypt"
	"golang.org/x/crypto/ssh/terminal"
)

var cmdHashPassword = &cobra.Command{
	Use:   "hash-password",
	Short: "Hashes a password for usage in user config files",
	Long: `Creates a salted hash using bcrypt for use in userconfig files, so that we don't
have to store a plaintext password.`,
	Run: func(cmd *cobra.Command, args []string) {
		log.Printf("Configuration in use: %v", viper.AllSettings())
		service.LoadConfig()

		fmt.Println("Enter password:")
		password, err := terminal.ReadPassword(int(os.Stdin.Fd()))
		if err != nil {
			log.Fatalf("failed to read password: %v", err)
		}
		fmt.Println("Enter password again:")
		passwordCheck, err := terminal.ReadPassword(int(os.Stdin.Fd()))
		if err != nil {
			log.Fatalf("failed to read password: %v", err)
		}
		if !bytes.Equal(password, passwordCheck) {
			log.Fatalln("the passwords do not match.")
		}

		hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
		if err != nil {
			log.Fatalf("failed to create password hash: %v", err)
		}
		fmt.Printf("Hashed password: %s\n", hash)
	},
}

func init() {
	rootCmd.AddCommand(cmdHashPassword)
}