package devices

import "sync"

// CommandIDManager manages the global command ID counter for 4O3A devices
// All 4O3A devices share the same command ID sequence
type CommandIDManager struct {
	mu      sync.Mutex
	counter int
}

var globalCommandID = &CommandIDManager{
	counter: 0,
}

// GetNextID returns the next command ID and increments the counter
func (m *CommandIDManager) GetNextID() int {
	m.mu.Lock()
	defer m.mu.Unlock()

	m.counter++
	return m.counter
}

// Reset resets the counter to 0 (useful for testing or restart)
func (m *CommandIDManager) Reset() {
	m.mu.Lock()
	defer m.mu.Unlock()
	m.counter = 0
}

// GetGlobalCommandID returns the global command ID manager
func GetGlobalCommandID() *CommandIDManager {
	return globalCommandID
}