const (
	Stopped         = State(windows.SERVICE_STOPPED)
	StartPending    = State(windows.SERVICE_START_PENDING)
	StopPending     = State(windows.SERVICE_STOP_PENDING)
	Running         = State(windows.SERVICE_RUNNING)
	ContinuePending = State(windows.SERVICE_CONTINUE_PENDING)
	PausePending    = State(windows.SERVICE_PAUSE_PENDING)
	Paused          = State(windows.SERVICE_PAUSED)
)

const (
	Stop                  = Cmd(windows.SERVICE_CONTROL_STOP)
	Pause                 = Cmd(windows.SERVICE_CONTROL_PAUSE)
	Continue              = Cmd(windows.SERVICE_CONTROL_CONTINUE)
	Interrogate           = Cmd(windows.SERVICE_CONTROL_INTERROGATE)
	Shutdown              = Cmd(windows.SERVICE_CONTROL_SHUTDOWN)
	ParamChange           = Cmd(windows.SERVICE_CONTROL_PARAMCHANGE)
	NetBindAdd            = Cmd(windows.SERVICE_CONTROL_NETBINDADD)
	NetBindRemove         = Cmd(windows.SERVICE_CONTROL_NETBINDREMOVE)
	NetBindEnable         = Cmd(windows.SERVICE_CONTROL_NETBINDENABLE)
	NetBindDisable        = Cmd(windows.SERVICE_CONTROL_NETBINDDISABLE)
	DeviceEvent           = Cmd(windows.SERVICE_CONTROL_DEVICEEVENT)
	HardwareProfileChange = Cmd(windows.SERVICE_CONTROL_HARDWAREPROFILECHANGE)
	PowerEvent            = Cmd(windows.SERVICE_CONTROL_POWEREVENT)
	SessionChange         = Cmd(windows.SERVICE_CONTROL_SESSIONCHANGE)
	PreShutdown           = Cmd(windows.SERVICE_CONTROL_PRESHUTDOWN)
)

const (
	AcceptStop                  = Accepted(windows.SERVICE_ACCEPT_STOP)
	AcceptShutdown              = Accepted(windows.SERVICE_ACCEPT_SHUTDOWN)
	AcceptPauseAndContinue      = Accepted(windows.SERVICE_ACCEPT_PAUSE_CONTINUE)
	AcceptParamChange           = Accepted(windows.SERVICE_ACCEPT_PARAMCHANGE)
	AcceptNetBindChange         = Accepted(windows.SERVICE_ACCEPT_NETBINDCHANGE)
	AcceptHardwareProfileChange = Accepted(windows.SERVICE_ACCEPT_HARDWAREPROFILECHANGE)
	AcceptPowerEvent            = Accepted(windows.SERVICE_ACCEPT_POWEREVENT)
	AcceptSessionChange         = Accepted(windows.SERVICE_ACCEPT_SESSIONCHANGE)
	AcceptPreShutdown           = Accepted(windows.SERVICE_ACCEPT_PRESHUTDOWN)
)

const (
	StartReasonDemand           = StartReason(windows.SERVICE_START_REASON_DEMAND)
	StartReasonAuto             = StartReason(windows.SERVICE_START_REASON_AUTO)
	StartReasonTrigger          = StartReason(windows.SERVICE_START_REASON_TRIGGER)
	StartReasonRestartOnFailure = StartReason(windows.SERVICE_START_REASON_RESTART_ON_FAILURE)
	StartReasonDelayedAuto      = StartReason(windows.SERVICE_START_REASON_DELAYEDAUTO)
)

type Accepted uint32

type ChangeRequest struct {
	Cmd           Cmd
	EventType     uint32
	EventData     uintptr
	CurrentStatus Status
	Context       uintptr
}

type Cmd uint32

type Handler interface {
	// Execute will be called by the package code at the start of
	// the service, and the service will exit once Execute completes.
	// Inside Execute you must read service change requests from r and
	// act accordingly. You must keep service control manager up to date
	// about state of your service by writing into s as required.
	// args contains service name followed by argument strings passed
	// to the service.
	// You can provide service exit code in exitCode return parameter,
	// with 0 being "no error". You can also indicate if exit code,
	// if any, is service specific or not by using svcSpecificEC
	// parameter.
	Execute(args []string, r <-chan ChangeRequest, s chan<- Status) (svcSpecificEC bool, exitCode uint32)
}

type StartReason uint32

type State uint32

type Status struct {
	State                   State
	Accepts                 Accepted
	CheckPoint              uint32 // used to report progress during a lengthy operation
	WaitHint                uint32 // estimated time required for a pending operation, in milliseconds
	ProcessId               uint32 // if the service is running, the process identifier of it, and otherwise zero
	Win32ExitCode           uint32 // set if the service has exited with a win32 exit code
	ServiceSpecificExitCode uint32 // set if the service has exited with a service-specific exit code
}