//
// WinService.h
//
// Library: Util
// Package: Windows
// Module:  WinService
//
// Definition of the WinService class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef Util_WinService_INCLUDED
#define Util_WinService_INCLUDED


#include "Poco/Util/Util.h"
#include "Poco/UnWindows.h"
#include <vector>


#define POCO_LPQUERY_SERVICE_CONFIG LPQUERY_SERVICE_CONFIGW
#define POCO_LPSERVICE_FAILURE_ACTION LPSERVICE_FAILURE_ACTIONSW


namespace Poco {
namespace Util {


class Util_API WinService
	/// This class provides an object-oriented interface to
	/// the Windows Service Control Manager for registering,
	/// unregistering, configuring, starting and stopping
	/// services.
	///
	/// This class is only available on Windows platforms.
{
public:
	enum Startup
	{
		SVC_AUTO_START,
		SVC_MANUAL_START,
		SVC_DISABLED
	};

	enum FailureActionType
	{
		SVC_NONE,
		SVC_REBOOT,
		SVC_RESTART,
		SVC_RUN_COMMAND
	};

	struct FailureAction
	{
		FailureActionType type;
		int delay;
	};

	using FailureActionVector = std::vector<FailureAction>;
	using FailureActionTypeVector = std::vector<FailureActionType>;

	WinService(const std::string& name);
		/// Creates the WinService, using the given service name.

	WinService(SC_HANDLE scmHandle, const std::string& name);
		/// Creates the WinService, using the given connection to
		/// a Windows Service Manager and the given service name.
		///
		/// The class will close the given scmHandle on destruction

	~WinService();
		/// Destroys the WinService.

	const std::string& name() const;
		/// Returns the service name.

	std::string displayName() const;
		/// Returns the service's display name.

	std::string path() const;
		/// Returns the path to the service executable.
		///
		/// Throws a NotFoundException if the service has not been registered.

	void registerService(const std::string& path, const std::string& displayName);
		/// Creates a Windows service with the executable specified by path
		/// and the given displayName.
		///
		/// Throws a ExistsException if the service has already been registered.

	void registerService(const std::string& path);
		/// Creates a Windows service with the executable specified by path
		/// and the given displayName. The service name is used as display name.
		///
		/// Throws a ExistsException if the service has already been registered.

	void unregisterService();
		/// Deletes the Windows service.
		///
		/// Throws a NotFoundException if the service has not been registered.

	bool isRegistered() const;
		/// Returns true if the service has been registered with the Service Control Manager.

	bool isRunning() const;
		/// Returns true if the service is currently running.

	bool isStopped() const;
		/// Returns true if the service is currently stopped.

	void start();
		/// Starts the service.
		/// Does nothing if the service is already running.
		///
		/// Throws a NotFoundException if the service has not been registered.

	void stop();
		/// Stops the service.
		/// Does nothing if the service is not running.
		///
		/// Throws a NotFoundException if the service has not been registered.

	void setStartup(Startup startup);
		/// Sets the startup mode for the service.

	Startup getStartup() const;
		/// Returns the startup mode for the service.

	void setFailureActions(FailureActionVector failureActions, const std::string& command = "", const std::string& rebootMessage = "");
		/// Sets the Failure Actions for the service.
		/// If one of the Actions is SVC_RUN_COMMAND the command Parameter is added.
		/// If one of the Actions is SVC_REBOOT the Reboot Message is set.

	FailureActionTypeVector getFailureActions() const;
		/// Returns the Failure Actions for the service.

	void setDescription(const std::string& description);
		/// Sets the service description in the registry.

	std::string getDescription() const;
		/// Returns the service description from the registry.

	static const int STARTUP_TIMEOUT;

protected:
	static const std::string REGISTRY_KEY;
	static const std::string REGISTRY_DESCRIPTION;

private:
	void open() const;
	bool tryOpen() const;
	void close() const;
	POCO_LPQUERY_SERVICE_CONFIG config() const;

	WinService();
	WinService(const WinService&);
	WinService& operator = (const WinService&);

	std::string       _name;
	SC_HANDLE         _scmHandle;
	mutable SC_HANDLE _svcHandle;
};


} } // namespace Poco::Util


#endif // Util_WinService_INCLUDED