/**
 * FreeRDP: A Remote Desktop Protocol Implementation
 * DirectFB Client
 *
 * Copyright 2011 Marc-Andre Moreau <marcandre.moreau@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.
 */

#include <errno.h>
#include <pthread.h>
#include <locale.h>

#include <freerdp/freerdp.h>
#include <freerdp/constants.h>
#include <freerdp/utils/event.h>

#include <freerdp/client/file.h>
#include <freerdp/client/cmdline.h>
#include <freerdp/client/channels.h>
#include <freerdp/client/cliprdr.h>

#include <winpr/crt.h>
#include <winpr/synch.h>

#include "df_event.h"
#include "df_graphics.h"

#include "dfreerdp.h"

#include <freerdp/log.h>
#define TAG CLIENT_TAG("directFB")

static HANDLE g_sem;
static int g_thread_count = 0;

struct thread_data
{
	freerdp* instance;
};

BOOL df_context_new(freerdp* instance, rdpContext* context)
{
	if (!(context->channels = freerdp_channels_new()))
		return FALSE;

	return TRUE;
}

void df_context_free(freerdp* instance, rdpContext* context)
{
	if (context && context->channels)
	{
		freerdp_channels_close(context->channels, instance);
		freerdp_channels_free(context->channels);
		context->channels = NULL;
	}
}

void df_begin_paint(rdpContext* context)
{
	rdpGdi* gdi = context->gdi;
	gdi->primary->hdc->hwnd->invalid->null = 1;
}

void df_end_paint(rdpContext* context)
{
	rdpGdi* gdi;
	dfInfo* dfi;

	gdi = context->gdi;
	dfi = ((dfContext*) context)->dfi;

	if (gdi->primary->hdc->hwnd->invalid->null)
		return;

#if 1
	dfi->update_rect.x = gdi->primary->hdc->hwnd->invalid->x;
	dfi->update_rect.y = gdi->primary->hdc->hwnd->invalid->y;
	dfi->update_rect.w = gdi->primary->hdc->hwnd->invalid->w;
	dfi->update_rect.h = gdi->primary->hdc->hwnd->invalid->h;
#else
	dfi->update_rect.x = 0;
	dfi->update_rect.y = 0;
	dfi->update_rect.w = gdi->width;
	dfi->update_rect.h = gdi->height;
#endif

	dfi->primary->Blit(dfi->primary, dfi->surface, &(dfi->update_rect), dfi->update_rect.x, dfi->update_rect.y);
}

BOOL df_get_fds(freerdp* instance, void** rfds, int* rcount, void** wfds, int* wcount)
{
	dfInfo* dfi;

	dfi = ((dfContext*) instance->context)->dfi;

	rfds[*rcount] = (void*)(long)(dfi->read_fds);
	(*rcount)++;

	return TRUE;
}

BOOL df_check_fds(freerdp* instance, fd_set* set)
{
	dfInfo* dfi;

	dfi = ((dfContext*) instance->context)->dfi;

	if (!FD_ISSET(dfi->read_fds, set))
		return TRUE;

	if (read(dfi->read_fds, &(dfi->event), sizeof(dfi->event)) > 0)
		df_event_process(instance, &(dfi->event));

	return TRUE;
}

BOOL df_pre_connect(freerdp* instance)
{
	dfInfo* dfi;
	BOOL bitmap_cache;
	dfContext* context;
	rdpSettings* settings;

	dfi = (dfInfo*) malloc(sizeof(dfInfo));
	ZeroMemory(dfi, sizeof(dfInfo));

	context = ((dfContext*) instance->context);
	context->dfi = dfi;

	settings = instance->settings;
	bitmap_cache = settings->BitmapCacheEnabled;

	settings->OrderSupport[NEG_DSTBLT_INDEX] = TRUE;
	settings->OrderSupport[NEG_PATBLT_INDEX] = TRUE;
	settings->OrderSupport[NEG_SCRBLT_INDEX] = TRUE;
	settings->OrderSupport[NEG_OPAQUE_RECT_INDEX] = TRUE;
	settings->OrderSupport[NEG_DRAWNINEGRID_INDEX] = FALSE;
	settings->OrderSupport[NEG_MULTIDSTBLT_INDEX] = FALSE;
	settings->OrderSupport[NEG_MULTIPATBLT_INDEX] = FALSE;
	settings->OrderSupport[NEG_MULTISCRBLT_INDEX] = FALSE;
	settings->OrderSupport[NEG_MULTIOPAQUERECT_INDEX] = TRUE;
	settings->OrderSupport[NEG_MULTI_DRAWNINEGRID_INDEX] = FALSE;
	settings->OrderSupport[NEG_LINETO_INDEX] = TRUE;
	settings->OrderSupport[NEG_POLYLINE_INDEX] = TRUE;
	settings->OrderSupport[NEG_MEMBLT_INDEX] = bitmap_cache;
	settings->OrderSupport[NEG_MEM3BLT_INDEX] = FALSE;
	settings->OrderSupport[NEG_MEMBLT_V2_INDEX] = bitmap_cache;
	settings->OrderSupport[NEG_MEM3BLT_V2_INDEX] = FALSE;
	settings->OrderSupport[NEG_SAVEBITMAP_INDEX] = FALSE;
	settings->OrderSupport[NEG_GLYPH_INDEX_INDEX] = FALSE;
	settings->OrderSupport[NEG_FAST_INDEX_INDEX] = FALSE;
	settings->OrderSupport[NEG_FAST_GLYPH_INDEX] = FALSE;
	settings->OrderSupport[NEG_POLYGON_SC_INDEX] = FALSE;
	settings->OrderSupport[NEG_POLYGON_CB_INDEX] = FALSE;
	settings->OrderSupport[NEG_ELLIPSE_SC_INDEX] = FALSE;
	settings->OrderSupport[NEG_ELLIPSE_CB_INDEX] = FALSE;

	dfi->clrconv = (CLRCONV*) malloc(sizeof(CLRCONV));
	ZeroMemory(dfi->clrconv, sizeof(CLRCONV));

	dfi->clrconv->alpha = 1;
	dfi->clrconv->invert = 0;
	dfi->clrconv->rgb555 = 0;

	dfi->clrconv->palette = (rdpPalette*) malloc(sizeof(rdpPalette));
	ZeroMemory(dfi->clrconv->palette, sizeof(rdpPalette));

	freerdp_channels_pre_connect(instance->context->channels, instance);

	return (instance->context->cache = cache_new(instance->settings)) != NULL;
}

BOOL df_post_connect(freerdp* instance)
{
	rdpGdi* gdi;
	dfInfo* dfi;
	dfContext* context;

	context = ((dfContext*) instance->context);
	dfi = context->dfi;

	if (!gdi_init(instance, CLRCONV_ALPHA | CLRCONV_INVERT | CLRBUF_16BPP | CLRBUF_32BPP, NULL))
		return FALSE;

	gdi = instance->context->gdi;

	dfi->err = DirectFBCreate(&(dfi->dfb));

	dfi->dsc.flags = DSDESC_CAPS;
	dfi->dsc.caps = DSCAPS_PRIMARY;
	dfi->err = dfi->dfb->CreateSurface(dfi->dfb, &(dfi->dsc), &(dfi->primary));
	dfi->err = dfi->primary->GetSize(dfi->primary, &(gdi->width), &(gdi->height));
	dfi->dfb->SetVideoMode(dfi->dfb, gdi->width, gdi->height, gdi->dstBpp);
	dfi->dfb->CreateInputEventBuffer(dfi->dfb, DICAPS_ALL, DFB_TRUE, &(dfi->event_buffer));
	dfi->event_buffer->CreateFileDescriptor(dfi->event_buffer, &(dfi->read_fds));

	dfi->dfb->GetDisplayLayer(dfi->dfb, 0, &(dfi->layer));
	dfi->layer->EnableCursor(dfi->layer, 1);

	dfi->dsc.flags = DSDESC_CAPS | DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PREALLOCATED | DSDESC_PIXELFORMAT;
	dfi->dsc.caps = DSCAPS_SYSTEMONLY;
	dfi->dsc.width = gdi->width;
	dfi->dsc.height = gdi->height;

	if (gdi->dstBpp == 32 || gdi->dstBpp == 24)
		dfi->dsc.pixelformat = DSPF_AiRGB;
	else if (gdi->dstBpp == 16 || gdi->dstBpp == 15)
		dfi->dsc.pixelformat = DSPF_RGB16;
	else if (gdi->dstBpp == 8)
		dfi->dsc.pixelformat = DSPF_RGB332;
	else
		dfi->dsc.pixelformat = DSPF_AiRGB;

	dfi->dsc.preallocated[0].data = gdi->primary_buffer;
	dfi->dsc.preallocated[0].pitch = gdi->width * gdi->bytesPerPixel;
	dfi->dfb->CreateSurface(dfi->dfb, &(dfi->dsc), &(dfi->surface));

	instance->update->BeginPaint = df_begin_paint;
	instance->update->EndPaint = df_end_paint;

	df_keyboard_init();

	pointer_cache_register_callbacks(instance->update);
	df_register_graphics(instance->context->graphics);

	return freerdp_channels_post_connect(instance->context->channels, instance) >= 0;
}

BOOL df_verify_certificate(freerdp* instance, char* subject, char* issuer, char* fingerprint)
{
	char answer;
	WLog_INFO(TAG, "Certificate details:");
	WLog_INFO(TAG, "\tSubject: %s", subject);
	WLog_INFO(TAG, "\tIssuer: %s", issuer);
	WLog_INFO(TAG, "\tThumbprint: %s", fingerprint);
	WLog_INFO(TAG, "The above X.509 certificate could not be verified, possibly because you do not have "
			  "the CA certificate in your certificate store, or the certificate has expired. "
			  "Please look at the documentation on how to create local certificate store for a private CA.");

	while (1)
	{
		WLog_INFO(TAG, "Do you trust the above certificate? (Y/N) ");
		answer = fgetc(stdin);

		if (answer == 'y' || answer == 'Y')
		{
			return TRUE;
		}
		else if (answer == 'n' || answer == 'N')
		{
			break;
		}
	}

	return FALSE;
}

static int df_receive_channel_data(freerdp* instance, UINT16 channelId, BYTE* data, int size, int flags, int total_size)
{
	return freerdp_channels_data(instance, channelId, data, size, flags, total_size);
}

static void df_process_cb_monitor_ready_event(rdpChannels* channels, freerdp* instance)
{
	wMessage* event;
	RDP_CB_FORMAT_LIST_EVENT* format_list_event;

	event = freerdp_event_new(CliprdrChannel_Class, CliprdrChannel_FormatList, NULL, NULL);

	format_list_event = (RDP_CB_FORMAT_LIST_EVENT*) event;
	format_list_event->num_formats = 0;

	freerdp_channels_send_event(channels, event);
}

static void df_process_channel_event(rdpChannels* channels, freerdp* instance)
{
	wMessage* event;

	event = freerdp_channels_pop_event(channels);

	if (event)
	{
		switch (GetMessageType(event->id))
		{
			case CliprdrChannel_MonitorReady:
				df_process_cb_monitor_ready_event(channels, instance);
				break;

			default:
				WLog_ERR(TAG, "df_process_channel_event: unknown event type %d", GetMessageType(event->id));
				break;
		}

		freerdp_event_free(event);
	}
}

static void df_free(dfInfo* dfi)
{
	dfi->dfb->Release(dfi->dfb);
	free(dfi);
}

int dfreerdp_run(freerdp* instance)
{
	int i;
	int fds;
	int max_fds;
	int rcount;
	int wcount;
	void* rfds[32];
	void* wfds[32];
	fd_set rfds_set;
	fd_set wfds_set;
	dfInfo* dfi;
	dfContext* context;
	rdpChannels* channels;

	ZeroMemory(rfds, sizeof(rfds));
	ZeroMemory(wfds, sizeof(wfds));

	if (!freerdp_connect(instance))
		return 0;

	context = (dfContext*) instance->context;

	dfi = context->dfi;
	channels = instance->context->channels;

	while (1)
	{
		rcount = 0;
		wcount = 0;

		if (freerdp_get_fds(instance, rfds, &rcount, wfds, &wcount) != TRUE)
		{
			WLog_ERR(TAG, "Failed to get FreeRDP file descriptor");
			break;
		}
		if (freerdp_channels_get_fds(channels, instance, rfds, &rcount, wfds, &wcount) != TRUE)
		{
			WLog_ERR(TAG, "Failed to get channel manager file descriptor");
			break;
		}
		if (df_get_fds(instance, rfds, &rcount, wfds, &wcount) != TRUE)
		{
			WLog_ERR(TAG, "Failed to get dfreerdp file descriptor");
			break;
		}

		max_fds = 0;
		FD_ZERO(&rfds_set);
		FD_ZERO(&wfds_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;

		if (select(max_fds + 1, &rfds_set, &wfds_set, NULL, NULL) == -1)
		{
			/* these are not really errors */
			if (!((errno == EAGAIN) ||
				(errno == EWOULDBLOCK) ||
				(errno == EINPROGRESS) ||
				(errno == EINTR))) /* signal occurred */
			{
				WLog_ERR(TAG, "dfreerdp_run: select failed");
				break;
			}
		}

		if (freerdp_check_fds(instance) != TRUE)
		{
			WLog_ERR(TAG, "Failed to check FreeRDP file descriptor");
			break;
		}
		if (df_check_fds(instance, &rfds_set) != TRUE)
		{
			WLog_ERR(TAG, "Failed to check dfreerdp file descriptor");
			break;
		}
		if (freerdp_channels_check_fds(channels, instance) != TRUE)
		{
			WLog_ERR(TAG, "Failed to check channel manager file descriptor");
			break;
		}
		df_process_channel_event(channels, instance);
	}

	freerdp_channels_disconnect(channels, instance);
	freerdp_disconnect(instance);

	freerdp_channels_close(channels, instance);
	freerdp_channels_free(channels);
	df_free(dfi);
	gdi_free(instance);
	freerdp_disconnect(instance);
	freerdp_free(instance);

	return 0;
}

void* thread_func(void* param)
{
	struct thread_data* data;
	data = (struct thread_data*) param;

	dfreerdp_run(data->instance);

	free(data);

	pthread_detach(pthread_self());

	g_thread_count--;

        if (g_thread_count < 1)
        	ReleaseSemaphore(g_sem, 1, NULL);

	return NULL;
}

int main(int argc, char* argv[])
{
	int status;
	pthread_t thread;
	freerdp* instance;
	dfContext* context;
	rdpChannels* channels;
	struct thread_data* data;

	setlocale(LC_ALL, "");

	if (!(g_sem = CreateSemaphore(NULL, 0, 1, NULL)))
	{
		WLog_ERR(TAG, "Failed to create semaphore");
		exit(1);
	}

	instance = freerdp_new();
	instance->PreConnect = df_pre_connect;
	instance->PostConnect = df_post_connect;
	instance->VerifyCertificate = df_verify_certificate;
	instance->ReceiveChannelData = df_receive_channel_data;

	instance->ContextSize = sizeof(dfContext);
	instance->ContextNew = df_context_new;
	instance->ContextFree = df_context_free;

	if (!freerdp_context_new(instance))
	{
		WLog_ERR(TAG, "Failed to create FreeRDP context");
		exit(1);
	}

	context = (dfContext*) instance->context;
	channels = instance->context->channels;

	DirectFBInit(&argc, &argv);

	instance->context->argc = argc;
	instance->context->argv = argv;

	status = freerdp_client_settings_parse_command_line(instance->settings, argc, argv, FALSE);

	if (status < 0)
		exit(0);

	freerdp_client_load_addins(instance->context->channels, instance->settings);

	data = (struct thread_data*) malloc(sizeof(struct thread_data));
	ZeroMemory(data, sizeof(sizeof(struct thread_data)));

	data->instance = instance;

	g_thread_count++;
	pthread_create(&thread, 0, thread_func, data);

	while (g_thread_count > 0)
	{
		WaitForSingleObject(g_sem, INFINITE);
	}

	return 0;
}