// Copyright (C) 2016 Luke Shumaker <lukeshu@sbcglobal.net>
//
// 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 sd_login

type Session string

type SessionState int

const (
	SessionOnline SessionState = iota
	SessionActive
	SessionClosing
)

func GetSessions() ([]Session, error) {
	strs, err := get_files_in_directory("/run/systemd/sessions/")
	if err != nil {
		return nil, err
	}
	sessions := make([]Session, len(strs))
	for i := range strs {
		sessions[i] = Session(strs[i])
	}
	return sessions, nil
}

func (sess Session) IsActive() bool {
	state, err := sess.GetState()
	return err == nil && state == SessionActive
}
func (sess Session) IsRemote() bool
func (sess Session) GetState() (SessionState, error)
func (sess Session) GetUser() (User, error)
func (sess Session) GetSeat() (Seat, error)

// PAM
func (sess Session) GetService() (string, error)

// tty, x11, wayland, mir, unspecified
func (sess Session) GetType() (string, error)

// user, greeter, lock-screen
func (sess Session) GetClass() (string, error)

// GNOME, KDE, systemd-console
func (sess Session) GetDesktop() (string, error)

// X11 DISPLAY
func (sess Session) GetDisplay() (string, error)
func (sess Session) GetRemoteHost() (string, error)

// PAM
func (sess Session) GetRemoteUser() (string, error)
func (sess Session) GetTTY() (string, error)
func (sess Session) GetVT() (uint, error)