package user

import (
	"errors"
	"fmt"
	"log"
	"strings"

	"github.com/spf13/cobra"
	"github.com/spf13/viper"
	ldap "gopkg.in/ldap.v2"
)

var (
	flagUserAttributes []string
)

func init() {
	// define user delete subcommand flags
	userEditCmd.Flags().StringP("base_ou", "o", "", "LDAP OU where your user entries are stored")
	userEditCmd.Flags().StringP("uid_attribute", "a", "uid", "LDAP DN attribute for users")
	userEditCmd.Flags().StringVarP(&flagUserUsername, "username", "u", "", "Username of user to delete")
	userEditCmd.Flags().StringSliceVarP(&flagUserAttributes, "attributes", "m", []string{}, "Comma-separated or multi-flagged list of attributes to change (format: attr=value)")
	// bind config file values to user delete flags
	viper.BindPFlag("user.base_ou", userEditCmd.Flags().Lookup("base_ou"))
	viper.BindPFlag("user.uid_attr", userEditCmd.Flags().Lookup("uid_attribute"))
}

// define user edit subcommand
var userEditCmd = &cobra.Command{
	Use:   "edit",
	Short: "Edit an LDAP user in the directory",
	Long:  `Edit an LDAP user resource in the directory.`,
	Run: func(cmd *cobra.Command, args []string) {
		// check if any attributes were given
		if len(flagUserAttributes) < 1 {
			log.Fatal(errors.New("You didn't supply any user attributes"))
		}

		// create new LDAP connection
		l, err := ldap.Dial("tcp", fmt.Sprintf("%s:%d", viper.GetString("host"), viper.GetInt("port")))
		if err != nil {
			log.Fatal(err)
		}
		defer l.Close()

		// bind as the admin user
		err = l.Bind(viper.GetString("bind_dn"), viper.GetString("bind_pw"))
		if err != nil {
			log.Fatal(err)
		}

		// set up user DN
		userDn := fmt.Sprintf("%s=%s,%s", viper.GetString("user.uid_attr"), flagUserUsername, viper.GetString("user.base_ou"))

		// create a new edit request object
		modifyRequest := ldap.NewModifyRequest(userDn)
		// loop through list of attribute changes
		for _, attrModify := range flagUserAttributes {
			attr := strings.Split(attrModify, "=")
			modifyRequest.Replace(attr[0], []string{attr[1]})
		}

		// perform the modify operation
		err = l.Modify(modifyRequest)
		if err != nil {
			log.Fatal(err)
		}
	},
}