package main

import (
	"os"
	"path/filepath"
	"strings"

	"github.com/rfjakob/gocryptfs/internal/configfile"
	"github.com/rfjakob/gocryptfs/internal/nametransform"
	"github.com/rfjakob/gocryptfs/internal/readpassword"
	"github.com/rfjakob/gocryptfs/internal/tlog"
)

// initDir initializes an empty directory for use as a gocryptfs cipherdir.
func initDir(args *argContainer) {
	err := checkDirEmpty(args.cipherdir)
	if err != nil {
		tlog.Fatal.Printf("Invalid cipherdir: %v", err)
		os.Exit(ERREXIT_INIT)
	}

	// Create gocryptfs.conf
	if args.extpass == "" {
		tlog.Info.Printf("Choose a password for protecting your files.")
	} else {
		tlog.Info.Printf("Using password provided via -extpass.")
	}
	password := readpassword.Twice(args.extpass)
	creator := tlog.ProgramName + " " + GitVersion
	err = configfile.CreateConfFile(args.config, password, args.plaintextnames, args.scryptn, creator)
	if err != nil {
		tlog.Fatal.Println(err)
		os.Exit(ERREXIT_INIT)
	}

	if !args.plaintextnames {
		// Create gocryptfs.diriv in the root dir
		err = nametransform.WriteDirIV(args.cipherdir)
		if err != nil {
			tlog.Fatal.Println(err)
			os.Exit(ERREXIT_INIT)
		}
	}

	tlog.Info.Printf(tlog.ColorGreen + "The filesystem has been created successfully." + tlog.ColorReset)
	wd, _ := os.Getwd()
	friendlyPath, _ := filepath.Rel(wd, args.cipherdir)
	if strings.HasPrefix(friendlyPath, "../") {
		// A relative path that starts with "../" is pretty unfriendly, just
		// keep the absolute path.
		friendlyPath = args.cipherdir
	}
	tlog.Info.Printf(tlog.ColorGrey+"You can now mount it using: %s %s MOUNTPOINT"+tlog.ColorReset,
		tlog.ProgramName, friendlyPath)
	os.Exit(0)
}