/**

 * FreeRDP: A Remote Desktop Protocol Implementation

 * FreeRDP Windows Server

 *

 * Copyright 2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>

 * Copyright 2012 Corey Clayton <can.of.tuna@gmail.com>

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <winpr/tchar.h>

#include <winpr/windows.h>

#include <winpr/winsock.h>

#include <freerdp/freerdp.h>

#include <freerdp/listener.h>

#include <freerdp/constants.h>

#include <freerdp/channels/wtsvc.h>

#include <freerdp/channels/channels.h>

#include <freerdp/build-config.h>

#include "wf_peer.h"

#include "wf_settings.h"

#include "wf_info.h"

#include "wf_interface.h"

#define TAG SERVER_TAG("windows")

#define SERVER_KEY "Software\\"FREERDP_VENDOR_STRING"\\" \

		FREERDP_PRODUCT_STRING"\\Server"

cbCallback cbEvent;

int get_screen_info(int id, _TCHAR* name, int* width, int* height, int* bpp)

{

	DISPLAY_DEVICE dd;

	memset(&dd, 0, sizeof(DISPLAY_DEVICE));

	dd.cb = sizeof(DISPLAY_DEVICE);

	if (EnumDisplayDevices(NULL, id, &dd, 0) != 0)

	{

		HDC dc;

		if (name != NULL)

			_stprintf(name, _T("%s (%s)"), dd.DeviceName, dd.DeviceString);

		dc = CreateDC(dd.DeviceName, NULL, NULL, NULL);

		*width = GetDeviceCaps(dc, HORZRES);

		*height = GetDeviceCaps(dc, VERTRES);

		*bpp = GetDeviceCaps(dc, BITSPIXEL);

		//ReleaseDC(NULL, dc);

		DeleteDC(dc);

	}

	else

	{

		return 0;

	}

	return 1;

}

void set_screen_id(int id)

{

	wfInfo* wfi;

	wfi = wf_info_get_instance();

	if (!wfi)

		return;

	wfi->screenID = id;

	return;

}

static DWORD WINAPI wf_server_main_loop(LPVOID lpParam)

{

	int i, fds;

	int rcount;

	int max_fds;

	void* rfds[32];

	fd_set rfds_set;

	freerdp_listener* instance;

	wfInfo* wfi;

	wfi = wf_info_get_instance();

	if (!wfi)

	{

		WLog_ERR(TAG, "Failed to get instance");

		return -1;

	}

	wfi->force_all_disconnect = FALSE;

	ZeroMemory(rfds, sizeof(rfds));

	instance = (freerdp_listener*) lpParam;

	while(wfi->force_all_disconnect == FALSE)

	{

		rcount = 0;

		if (instance->GetFileDescriptor(instance, rfds, &rcount) != TRUE)

		{

			WLog_ERR(TAG, "Failed to get FreeRDP file descriptor");

			break;

		}

		max_fds = 0;

		FD_ZERO(&rfds_set);

		for (i = 0; i < rcount; i++)

		{

			fds = (int)(long)(rfds[i]);

			if (fds > max_fds)

				max_fds = fds;

			FD_SET(fds, &rfds_set);

		}

		if (max_fds == 0)

			break;

		select(max_fds + 1, &rfds_set, NULL, NULL, NULL);

		if (instance->CheckFileDescriptor(instance) != TRUE)

		{

			WLog_ERR(TAG, "Failed to check FreeRDP file descriptor");

			break;

		}

	}

	WLog_INFO(TAG, "wf_server_main_loop terminating");

	instance->Close(instance);

	return 0;

}

BOOL wfreerdp_server_start(wfServer* server)

{

	freerdp_listener* instance;

	server->instance = freerdp_listener_new();

	server->instance->PeerAccepted = wf_peer_accepted;

	instance = server->instance;

	wf_settings_read_dword(HKEY_LOCAL_MACHINE, SERVER_KEY,

				_T("DefaultPort"), &server->port);

	if (!instance->Open(instance, NULL, (UINT16) server->port))

		return FALSE;

	if (!(server->thread = CreateThread(NULL, 0, wf_server_main_loop, (void*) instance, 0, NULL)))

		return FALSE;

	return TRUE;

}

BOOL wfreerdp_server_stop(wfServer* server)

{

	wfInfo* wfi;

	wfi = wf_info_get_instance();

	if (!wfi)

		return FALSE;

	WLog_INFO(TAG, "Stopping server");

	wfi->force_all_disconnect = TRUE;

	server->instance->Close(server->instance);

	return TRUE;

}

wfServer* wfreerdp_server_new()

{

	WSADATA wsaData;

	wfServer* server;

	if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)

		return NULL;

	server = (wfServer*) calloc(1, sizeof(wfServer));

	if (server)

	{

		server->port = 3389;

	}

	WTSRegisterWtsApiFunctionTable(FreeRDP_InitWtsApi());

	cbEvent = NULL;

	return server;

}

void wfreerdp_server_free(wfServer* server)

{

	free(server);

	WSACleanup();

}

BOOL wfreerdp_server_is_running(wfServer* server)

{

	DWORD tStatus;

	BOOL bRet;

	bRet = GetExitCodeThread(server->thread, &tStatus);

	if (bRet == 0)

	{

		WLog_ERR(TAG, "Error in call to GetExitCodeThread");

		return FALSE;

	}

	if (tStatus == STILL_ACTIVE)

		return TRUE;

	return FALSE;

}

UINT32 wfreerdp_server_num_peers()

{

	wfInfo* wfi;

	wfi = wf_info_get_instance();

	if (!wfi)

		return -1;

	return wfi->peerCount;

}

UINT32 wfreerdp_server_get_peer_hostname(int pId, wchar_t * dstStr)

{

	wfInfo* wfi;

	freerdp_peer* peer;

	wfi = wf_info_get_instance();

	if (!wfi)

		return 0;

	peer = wfi->peers[pId];

	if (peer)

	{

		UINT32 sLen;

		sLen = strnlen_s(peer->hostname, 50);

		swprintf(dstStr, 50, L"%hs", peer->hostname);

		return sLen;

	}

	else

	{

		WLog_WARN(TAG, "nonexistent peer id=%d", pId);

		return 0;

	}

}

BOOL wfreerdp_server_peer_is_local(int pId)

{

	wfInfo* wfi;

	freerdp_peer* peer;

	wfi = wf_info_get_instance();

	if (!wfi)

		return FALSE;

	peer = wfi->peers[pId];

	if (peer)

	{

		return peer->local;

	}

	else

	{

		return FALSE;

	}

}

BOOL wfreerdp_server_peer_is_connected(int pId)

{

	wfInfo* wfi;

	freerdp_peer* peer;

	wfi = wf_info_get_instance();

	if (!wfi)

		return FALSE;

	peer = wfi->peers[pId];

	if (peer)

	{

		return peer->connected;

	}

	else

	{

		return FALSE;

	}

}

BOOL wfreerdp_server_peer_is_activated(int pId)

{

	wfInfo* wfi;

	freerdp_peer* peer;

	wfi = wf_info_get_instance();

	if (!wfi)

		return FALSE;

	peer = wfi->peers[pId];

	if (peer)

	{

		return peer->activated;

	}

	else

	{

		return FALSE;

	}

}

BOOL wfreerdp_server_peer_is_authenticated(int pId)

{

	wfInfo* wfi;

	freerdp_peer* peer;

	wfi = wf_info_get_instance();

	if (!wfi)

		return FALSE;

	peer = wfi->peers[pId];

	if (peer)

	{

		return peer->authenticated;

	}

	else

	{

		return FALSE;

	}

}

void wfreerdp_server_register_callback_event(cbCallback cb)

{

	cbEvent = cb;

}

void wfreerdp_server_peer_callback_event(int pId, UINT32 eType)

{

	if (cbEvent)

		cbEvent(pId, eType);

}