package txflow

import "sync"

type Position struct {
	X, Y, Z float64
	World   string
}

type World interface {
	Name() string
	Exec(func(Tx))
}

type Tx interface {
	World() World
}

type Entity interface {
	Teleport(Position)
}

type Handle interface {
	Entity(tx Tx) (Entity, bool)
	ExecWorld(func(tx Tx, e Entity))
}

type WorldResolver interface {
	Resolve(name string) (World, error)
}

type SafeBox[T any] struct {
	mu sync.RWMutex
	v  T
}

func (s *SafeBox[T]) Set(v T) {
	s.mu.Lock()
	s.v = v
	s.mu.Unlock()
}

func (s *SafeBox[T]) Get() T {
	s.mu.RLock()
	v := s.v
	s.mu.RUnlock()
	return v
}