package main

import (
	"sync/atomic"
	"time"

	p9 "github.com/Harvey-OS/ninep/protocol"

	"git.samanthony.xyz/buth/back/auth"
)

type Session struct {
	auth.SessId
	auth.Uname
	qid   p9.QID
	timer *time.Timer
	dead  *atomic.Bool
}

func NewSession(id auth.SessId, uname auth.Uname) *Session {
	dead := new(atomic.Bool)
	timer := time.AfterFunc(auth.SessTimeout, func() { dead.Store(true) })
	return &Session{
		id,
		uname,
		p9.QID{Path: NextQidPath()},
		timer,
		dead,
	}
}

// Close expires the session immediately.
func (s *Session) Close() {
	s.timer.Stop()
	s.dead.Store(true)
}

// IsActive returns true if the session has not yet expired.
func (s *Session) IsActive() bool {
	return !s.dead.Load()
}

// Extend resets the session's timer or returns false if it has
// already expired.
func (s *Session) Extend() bool {
	if s.timer.Stop() {
		s.timer.Reset(auth.SessTimeout)
		return true
	}
	// already expired
	return false
}

func (s *Session) Qid() (p9.QID, error) { return s.qid, nil }

func (s *Session) Open(mode p9.Mode) error {
	if mode != p9.OREAD {
		return ErrPerm
	}
	return nil
}