/*
 * Remmina - The GTK+ Remote Desktop Client
 * Copyright (C) 2010 Vic Lee 
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, 
 * Boston, MA 02111-1307, USA.
 *
 *  In addition, as a special exception, the copyright holders give
 *  permission to link the code of portions of this program with the
 *  OpenSSL library under certain conditions as described in each
 *  individual source file, and distribute linked combinations
 *  including the two.
 *  You must obey the GNU General Public License in all respects
 *  for all of the code used other than OpenSSL. *  If you modify
 *  file(s) with this exception, you may extend this exception to your
 *  version of the file(s), but you are not obligated to do so. *  If you
 *  do not wish to do so, delete this exception statement from your
 *  version. *  If you delete this exception statement from all source
 *  files in the program, then also delete it here.
 *
 */

#include "config.h"

#ifdef HAVE_LIBSSH

#include <gtk/gtk.h>
#include <glib/gi18n.h>
#include "remmina_public.h"
#include "remmina_sftp_client.h"
#include "remmina_plugin_manager.h"
#include "remmina_ssh.h"
#include "remmina_protocol_widget.h"
#include "remmina_sftp_plugin.h"

#define REMMINA_PLUGIN_SFTP_FEATURE_PREF_SHOW_HIDDEN 1

typedef struct _RemminaPluginSftpData
{
	GtkWidget *client;
	pthread_t thread;
	RemminaSFTP *sftp;
}RemminaPluginSftpData;

static RemminaPluginService *remmina_plugin_service = NULL;

static gpointer
remmina_plugin_sftp_main_thread (gpointer data)
{
	RemminaProtocolWidget *gp = (RemminaProtocolWidget*) data;
	RemminaPluginSftpData *gpdata;
	RemminaFile *remminafile;
	RemminaSSH *ssh;
	RemminaSFTP *sftp = NULL;
	gboolean cont = FALSE;
	gint ret;
	const gchar *cs;

	pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, NULL);
	CANCEL_ASYNC

	gpdata = (RemminaPluginSftpData*) g_object_get_data (G_OBJECT(gp), "plugin-data");

	ssh = g_object_get_data (G_OBJECT(gp), "user-data");
	if (ssh)
	{
		/* Create SFTP connection based on existing SSH session */
		sftp = remmina_sftp_new_from_ssh (ssh);
		if (remmina_ssh_init_session (REMMINA_SSH (sftp)) &&
				remmina_ssh_auth (REMMINA_SSH (sftp), NULL) > 0 &&
				remmina_sftp_open (sftp))
		{
			cont = TRUE;
		}
	}
	else
	{
		/* New SFTP connection */
		remminafile = remmina_plugin_service->protocol_plugin_get_file (gp);
		remmina_plugin_service->file_set_string (remminafile, "ssh_server",
				remmina_plugin_service->file_get_string (remminafile, "server"));

		sftp = remmina_sftp_new_from_file (remminafile);
		while (1)
		{
			if (!remmina_ssh_init_session (REMMINA_SSH (sftp)))
			{
				remmina_plugin_service->protocol_plugin_set_error (gp, "%s", REMMINA_SSH (sftp)->error);
				break;
			}

			ret = remmina_ssh_auth_gui (REMMINA_SSH (sftp),
					REMMINA_INIT_DIALOG (remmina_protocol_widget_get_init_dialog (gp)), TRUE);
			if (ret == 0)
			{
				remmina_plugin_service->protocol_plugin_set_error (gp, "%s", REMMINA_SSH (sftp)->error);
			}
			if (ret <= 0) break;

			if (!remmina_sftp_open (sftp))
			{
				remmina_plugin_service->protocol_plugin_set_error (gp, "%s", REMMINA_SSH (sftp)->error);
				break;
			}

			cs = remmina_plugin_service->file_get_string (remminafile, "execpath");
			if (cs && cs[0])
			{
				remmina_ftp_client_set_dir (REMMINA_FTP_CLIENT (gpdata->client), cs);
			}

			cont = TRUE;
			break;
		}
	}
	if (!cont)
	{
		if (sftp) remmina_sftp_free (sftp);
		IDLE_ADD ((GSourceFunc) remmina_plugin_service->protocol_plugin_close_connection, gp);
		return NULL;
	}

	remmina_sftp_client_open (REMMINA_SFTP_CLIENT (gpdata->client), sftp);
	/* RemminaSFTPClient owns the object, we just take the reference */
	gpdata->sftp = sftp;

	remmina_plugin_service->protocol_plugin_emit_signal (gp, "connect");

	gpdata->thread = 0;
	return NULL;
}

static void
remmina_plugin_sftp_client_on_realize (GtkWidget *widget, RemminaProtocolWidget *gp)
{
	RemminaFile *remminafile;

	remminafile = remmina_plugin_service->protocol_plugin_get_file (gp);
	remmina_ftp_client_load_state (REMMINA_FTP_CLIENT (widget), remminafile);
}

static void
remmina_plugin_sftp_init (RemminaProtocolWidget *gp)
{
	RemminaPluginSftpData *gpdata;
	RemminaFile *remminafile;

	gpdata = g_new0 (RemminaPluginSftpData, 1);
	g_object_set_data_full (G_OBJECT(gp), "plugin-data", gpdata, g_free);

	remminafile = remmina_plugin_service->protocol_plugin_get_file (gp);

	gpdata->client = remmina_sftp_client_new ();
	gtk_widget_show(gpdata->client);
	gtk_container_add(GTK_CONTAINER (gp), gpdata->client);

	remmina_ftp_client_set_show_hidden (REMMINA_FTP_CLIENT (gpdata->client),
			remmina_plugin_service->file_get_int (remminafile, "showhidden", FALSE));

	remmina_plugin_service->protocol_plugin_register_hostkey (gp, gpdata->client);

	g_signal_connect(G_OBJECT(gpdata->client),
			"realize", G_CALLBACK(remmina_plugin_sftp_client_on_realize), gp);
}

static gboolean
remmina_plugin_sftp_open_connection (RemminaProtocolWidget *gp)
{
	RemminaPluginSftpData *gpdata;

	gpdata = (RemminaPluginSftpData*) g_object_get_data (G_OBJECT(gp), "plugin-data");

	remmina_plugin_service->protocol_plugin_set_expand (gp, TRUE);
	remmina_plugin_service->protocol_plugin_set_width (gp, 640);
	remmina_plugin_service->protocol_plugin_set_height (gp, 480);

	if (pthread_create (&gpdata->thread, NULL, remmina_plugin_sftp_main_thread, gp))
	{
		remmina_plugin_service->protocol_plugin_set_error (gp,
				"Failed to initialize pthread. Falling back to non-thread mode...");
		gpdata->thread = 0;
		return FALSE;
	}
	else
	{
		return TRUE;
	}
	return TRUE;
}

static gboolean
remmina_plugin_sftp_close_connection (RemminaProtocolWidget *gp)
{
	RemminaPluginSftpData *gpdata;
	RemminaFile *remminafile;

	gpdata = (RemminaPluginSftpData*) g_object_get_data (G_OBJECT(gp), "plugin-data");
	remminafile = remmina_plugin_service->protocol_plugin_get_file (gp);
	if (gpdata->thread)
	{
		pthread_cancel (gpdata->thread);
		if (gpdata->thread) pthread_join (gpdata->thread, NULL);
	}

	remmina_ftp_client_save_state (REMMINA_FTP_CLIENT (gpdata->client), remminafile);
	remmina_plugin_service->protocol_plugin_emit_signal (gp, "disconnect");
	return FALSE;
}

static gboolean
remmina_plugin_sftp_query_feature (RemminaProtocolWidget *gp, const RemminaProtocolFeature *feature)
{
	return TRUE;
}

static void
remmina_plugin_sftp_call_feature (RemminaProtocolWidget *gp, const RemminaProtocolFeature *feature)
{
	RemminaPluginSftpData *gpdata;
	RemminaFile *remminafile;

	gpdata = (RemminaPluginSftpData*) g_object_get_data (G_OBJECT(gp), "plugin-data");
	remminafile = remmina_plugin_service->protocol_plugin_get_file (gp);
	switch (feature->id)
	{
		case REMMINA_PROTOCOL_FEATURE_TOOL_SSH:
		remmina_plugin_service->open_connection (
				remmina_file_dup_temp_protocol (remmina_plugin_service->protocol_plugin_get_file (gp), "SSH"),
				NULL, gpdata->sftp, NULL);
		return;
		case REMMINA_PROTOCOL_FEATURE_TOOL_SFTP:
		remmina_plugin_service->open_connection (
				remmina_file_dup_temp_protocol (remmina_plugin_service->protocol_plugin_get_file (gp), "SFTP"),
				NULL, gpdata->sftp, NULL);
		return;
		case REMMINA_PLUGIN_SFTP_FEATURE_PREF_SHOW_HIDDEN:
		remmina_ftp_client_set_show_hidden (REMMINA_FTP_CLIENT (gpdata->client),
				remmina_plugin_service->file_get_int (remminafile, "showhidden", FALSE));
		return;
	}
}

static const RemminaProtocolFeature remmina_plugin_sftp_features[] =
{
	{	REMMINA_PROTOCOL_FEATURE_TYPE_PREF, REMMINA_PLUGIN_SFTP_FEATURE_PREF_SHOW_HIDDEN,
		GINT_TO_POINTER (REMMINA_PROTOCOL_FEATURE_PREF_CHECK), "showhidden", N_("Show Hidden Files")},
	{	REMMINA_PROTOCOL_FEATURE_TYPE_END, 0, NULL, NULL, NULL}
};

static RemminaProtocolPlugin remmina_plugin_sftp =
{
	REMMINA_PLUGIN_TYPE_PROTOCOL,
	"SFTP",
	N_("SFTP - Secure File Transfer"),
	GETTEXT_PACKAGE,
	VERSION,

	"remmina-sftp",
	"remmina-sftp",
	NULL,
	NULL,
	REMMINA_PROTOCOL_SSH_SETTING_SFTP,
	remmina_plugin_sftp_features,

	remmina_plugin_sftp_init,
	remmina_plugin_sftp_open_connection,
	remmina_plugin_sftp_close_connection,
	remmina_plugin_sftp_query_feature,
	remmina_plugin_sftp_call_feature
};

void
remmina_sftp_plugin_register (void)
{
	remmina_plugin_service = &remmina_plugin_manager_service;
	remmina_plugin_service->register_plugin ((RemminaPlugin *) &remmina_plugin_sftp);
}

#else

void remmina_sftp_plugin_register(void)
{
}

#endif

