/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *		Ettore Perazzoli <ettore@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include <config.h>

#include <gtk/gtk.h>
#include <glib/gi18n.h>
#include <glib/gstdio.h>

#ifdef G_OS_WIN32
#define WIN32_LEAN_AND_MEAN
#ifdef DATADIR
#undef DATADIR
#endif
#include <io.h>
#include <conio.h>
#define _WIN32_WINNT 0x0500
#include <windows.h>
#endif

#include <glade/glade.h>
#include <dbus/dbus-glib.h>
#include <gconf/gconf-client.h>

#include <libxml/xmlmemory.h>
#include <libxml/parser.h>
#include <libxml/tree.h>

#include <libedataserver/e-categories.h>
#include <libedataserverui/e-passwords.h>

#include "e-shell.h"
#include "e-shell-migrate.h"
#include "e-config-upgrade.h"
#include "es-event.h"

#include "e-util/e-bconf-map.h"
#include "e-util/e-dialog-utils.h"
#include "e-util/e-error.h"
#include "e-util/e-icon-factory.h"
#include "e-util/e-plugin.h"
#include "e-util/e-plugin-ui.h"
#include "e-util/e-profile-event.h"
#include "e-util/e-util-private.h"
#include "e-util/e-util.h"

#include "widgets/misc/e-cursors.h"

#include <fcntl.h>
#include <signal.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>

#define SKIP_WARNING_DIALOG_KEY \
	"/apps/evolution/shell/skip_warning_dialog"

/* STABLE_VERSION is only defined for development versions. */
#ifdef STABLE_VERSION
#define DEVELOPMENT 1
#endif

/* Command-line options.  */
static gboolean start_online = FALSE;
static gboolean start_offline = FALSE;
static gboolean setup_only = FALSE;
static gboolean force_shutdown = FALSE;
#ifdef DEVELOPMENT
static gboolean force_migrate = FALSE;
#endif
static gboolean disable_eplugin = FALSE;
static gboolean disable_preview = FALSE;
static gboolean idle_cb (gchar **uris);

static gchar *requested_view = NULL;
static gchar *evolution_debug_log = NULL;
static gchar **remaining_args;

/* Defined in <e-shell.h> */
extern EShell *default_shell;

static void
categories_icon_theme_hack (void)
{
	GtkIconTheme *icon_theme;
	const gchar *category_name;
	const gchar *filename;
	gchar *dirname;

	/* XXX Allow the category icons to be referenced as named
	 *     icons, since GtkAction does not support GdkPixbufs. */

	/* Get the icon file for some default category.  Doesn't matter
	 * which, so long as it has an icon.  We're just interested in
	 * the directory components. */
	category_name = _("Birthday");
	filename = e_categories_get_icon_file_for (category_name);
	g_return_if_fail (filename != NULL && *filename != '\0');

	/* Extract the directory components. */
	dirname = g_path_get_dirname (filename);

	/* Add it to the icon theme's search path.  This relies on
	 * GtkIconTheme's legacy feature of using image files found
	 * directly in the search path. */
	icon_theme = gtk_icon_theme_get_default ();
	gtk_icon_theme_append_search_path (icon_theme, dirname);

	g_free (dirname);
}

#ifdef DEVELOPMENT

/* Warning dialog to scare people off a little bit.  */

static gboolean
show_development_warning(void)
{
	GtkWidget *vbox;
	GtkWidget *label;
	GtkWidget *warning_dialog;
	GtkWidget *checkbox;
	GtkWidget *alignment;
	gboolean skip;
	gchar *text;

	warning_dialog = gtk_dialog_new ();
	gtk_window_set_title (GTK_WINDOW (warning_dialog), "Evolution " VERSION);
	gtk_window_set_modal (GTK_WINDOW (warning_dialog), TRUE);
	gtk_dialog_add_button (GTK_DIALOG (warning_dialog), GTK_STOCK_OK, GTK_RESPONSE_OK);

	gtk_dialog_set_has_separator (GTK_DIALOG (warning_dialog), FALSE);

	gtk_container_set_border_width (GTK_CONTAINER (GTK_DIALOG (warning_dialog)->vbox), 0);
	gtk_container_set_border_width (GTK_CONTAINER (GTK_DIALOG (warning_dialog)->action_area), 12);

	vbox = gtk_vbox_new (FALSE, 12);
	gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
	gtk_box_pack_start (GTK_BOX (GTK_DIALOG (warning_dialog)->vbox), vbox,
			    TRUE, TRUE, 0);

	text = g_strdup_printf(
		/* xgettext:no-c-format */
		/* Preview/Alpha/Beta version warning message */
		_("Hi.  Thanks for taking the time to download this preview release\n"
		  "of the Evolution groupware suite.\n"
		  "\n"
		  "This version of Evolution is not yet complete. It is getting close,\n"
		  "but some features are either unfinished or do not work properly.\n"
		  "\n"
		  "If you want a stable version of Evolution, we urge you to uninstall\n"
		  "this version, and install version %s instead.\n"
		  "\n"
		  "If you find bugs, please report them to us at bugzilla.gnome.org.\n"
                  "This product comes with no warranty and is not intended for\n"
		  "individuals prone to violent fits of anger.\n"
                  "\n"
		  "We hope that you enjoy the results of our hard work, and we\n"
		  "eagerly await your contributions!\n"),
		STABLE_VERSION);
	label = gtk_label_new (text);
	g_free(text);

	gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_LEFT);
	gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.0);

	gtk_box_pack_start (GTK_BOX (vbox), label, TRUE, TRUE, 0);

	label = gtk_label_new (_("Thanks\n"
				 "The Evolution Team\n"));
	gtk_label_set_justify(GTK_LABEL(label), GTK_JUSTIFY_RIGHT);
	gtk_misc_set_alignment(GTK_MISC(label), 1, .5);

	gtk_box_pack_start (GTK_BOX (vbox), label, TRUE, TRUE, 0);

	checkbox = gtk_check_button_new_with_label (_("Do not tell me again"));

	alignment = gtk_alignment_new (0.0, 0.0, 0.0, 0.0);

	gtk_container_add (GTK_CONTAINER (alignment), checkbox);
	gtk_box_pack_start (GTK_BOX (vbox), alignment, TRUE, TRUE, 0);

	gtk_widget_show_all (warning_dialog);

	gtk_dialog_run (GTK_DIALOG (warning_dialog));

	skip = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (checkbox));

	gtk_widget_destroy (warning_dialog);

	return skip;
}

static void
destroy_config (GConfClient *client)
{
	/* Unset the source stuff */
	gconf_client_unset (client, "/apps/evolution/calendar/sources", NULL);
	gconf_client_unset (client, "/apps/evolution/tasks/sources", NULL);
	gconf_client_unset (client, "/apps/evolution/addressbook/sources", NULL);

	/* Reset the version */
	gconf_client_set_string (client, "/apps/evolution/version", "1.4.0", NULL);

	/* Clear the dir */
	system ("rm -Rf ~/.evolution");
}

#endif /* DEVELOPMENT */

/* This is for doing stuff that requires the GTK+ loop to be running already.  */

static gboolean
idle_cb (gchar **uris)
{
	EShell *shell;

	shell = e_shell_get_default ();

	/* These calls do the right thing when another Evolution
	 * process is running. */
	if (uris != NULL && *uris != NULL) {
		if (e_shell_handle_uris (shell, uris) == 0)
			gtk_main_quit ();
	} else
		e_shell_create_shell_window (shell, requested_view);

	/* If another Evolution process is running, we're done. */
	if (unique_app_is_running (UNIQUE_APP (shell)))
		gtk_main_quit ();

	return FALSE;
}

#ifndef G_OS_WIN32

/* SIGSEGV handling.

   The GNOME SEGV handler will lose if it's not run from the main Gtk
   thread. So if we have to redirect the signal if the crash happens in another
   thread.  */

static void (*gnome_segv_handler) (gint);
static GStaticMutex segv_mutex = G_STATIC_MUTEX_INIT;
static pthread_t main_thread;

static void
segv_redirect (gint sig)
{
	if (pthread_self () == main_thread)
		gnome_segv_handler (sig);
	else {
		pthread_kill (main_thread, sig);

		/* We can't return from the signal handler or the thread may
		   SEGV again. But we can't pthread_exit, because then the
		   thread may get cleaned up before bug-buddy can get a stack
		   trace. So we block by trying to lock a mutex we know is
		   already locked.  */
		g_static_mutex_lock (&segv_mutex);
	}
}

static void
setup_segv_redirect (void)
{
	struct sigaction sa, osa;

	sigaction (SIGSEGV, NULL, &osa);
	if (osa.sa_handler == SIG_DFL)
		return;

	main_thread = pthread_self ();

	sa.sa_flags = 0;
	sigemptyset (&sa.sa_mask);
	sa.sa_handler = segv_redirect;
	sigaction (SIGSEGV, &sa, NULL);
	sigaction (SIGBUS, &sa, NULL);
	sigaction (SIGFPE, &sa, NULL);

	sa.sa_handler = SIG_IGN;
	sigaction (SIGXFSZ, &sa, NULL);
	gnome_segv_handler = osa.sa_handler;
	g_static_mutex_lock (&segv_mutex);
}

#else
#define setup_segv_redirect() (void)0
#endif

static GOptionEntry entries[] = {
	{ "component", 'c', 0, G_OPTION_ARG_STRING, &requested_view,
	  N_("Start Evolution activating the specified component"), NULL },
	{ "offline", '\0', 0, G_OPTION_ARG_NONE, &start_offline,
	  N_("Start in offline mode"), NULL },
	{ "online", '\0', 0, G_OPTION_ARG_NONE, &start_online,
	  N_("Start in online mode"), NULL },
#ifdef KILL_PROCESS_CMD
	{ "force-shutdown", '\0', 0, G_OPTION_ARG_NONE, &force_shutdown,
	  N_("Forcibly shut down Evolution"), NULL },
#endif
#ifdef DEVELOPMENT
	{ "force-migrate", '\0', 0, G_OPTION_ARG_NONE, &force_migrate,
	  N_("Forcibly re-migrate from Evolution 1.4"), NULL },
#endif
	{ "debug", '\0', 0, G_OPTION_ARG_STRING, &evolution_debug_log,
	  N_("Send the debugging output of all components to a file."), NULL },
	{ "disable-eplugin", '\0', 0, G_OPTION_ARG_NONE, &disable_eplugin,
	  N_("Disable loading of any plugins."), NULL },
	{ "disable-preview", '\0', 0, G_OPTION_ARG_NONE, &disable_preview,
	  N_("Disable preview pane of Mail, Contacts and Tasks."), NULL },
	{ "setup-only", '\0', G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_NONE,
	  &setup_only, NULL, NULL },
	{ G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_STRING_ARRAY, &remaining_args, NULL, NULL },
	{ NULL }
};

#ifdef G_OS_WIN32
static void
set_paths (void)
{
	/* Set PATH to include the Evolution executable's folder
	 * and the lib/evolution/$(BASE_VERSION)/components folder. */
	wchar_t exe_filename[MAX_PATH];
	wchar_t *p;
	gchar *exe_folder_utf8;
	gchar *components_folder_utf8;
	gchar *top_folder_utf8;
	gchar *path;

	GetModuleFileNameW (NULL, exe_filename, G_N_ELEMENTS (exe_filename));

	p = wcsrchr (exe_filename, L'\\');
	g_assert (p != NULL);

	*p = L'\0';
	exe_folder_utf8 = g_utf16_to_utf8 (exe_filename, -1, NULL, NULL, NULL);

	p = wcsrchr (exe_filename, L'\\');
	g_assert (p != NULL);

	*p = L'\0';
	top_folder_utf8 = g_utf16_to_utf8 (exe_filename, -1, NULL, NULL, NULL);
	components_folder_utf8 = g_strconcat (
		top_folder_utf8, "/lib/evolution/"
		BASE_VERSION "/components", NULL);

	path = g_build_path (
		";", exe_folder_utf8,
		components_folder_utf8, g_getenv ("PATH"), NULL);
	if (!g_setenv ("PATH", path, TRUE))
		g_warning ("Could not set PATH for Evolution "
			   "and its child processes");

	g_free (path);
	g_free (exe_folder_utf8);
	g_free (components_folder_utf8);

	g_free (top_folder_utf8);
}
#endif

static void G_GNUC_NORETURN
shell_force_shutdown (void)
{
	gchar *program;

	/* This is not as destructive as it was in the Bonobo era.
	 * The Evolution-Data-Server D-Bus services should not be killed
	 * because other programs may be using them.  The alarm daemon is
	 * an autostart program now and Evolution no longer spawns it, so
	 * that should not be killed either.  The only thing left to do
	 * really is shoot ourselves. */

	/* XXX Maybe --force-shutdown should be deprecated. */

	program = g_find_program_in_path ("pkill");

	if (program == NULL) {
		g_printerr ("Could not find `pkill' program in path.\n");
		exit (1);
	}

	/* This does not return. */
	execl (program, "pkill", "evolution", NULL);

	g_assert_not_reached ();
}

static void
shell_window_destroyed_cb (EShell *shell)
{
	if (e_shell_get_watched_windows (shell) == NULL)
		gtk_main_quit ();
}

static void
create_default_shell (void)
{
	EShell *shell;
	GConfClient *client;
	gboolean online = TRUE;
	const gchar *key;
	GError *error = NULL;

	client = gconf_client_get_default ();
	key = "/apps/evolution/shell/start_offline";

	/* Requesting online or offline mode from the command-line
	 * should be persistent, just like selecting it in the UI. */

	if (start_online) {
		online = TRUE;
		gconf_client_set_bool (client, key, FALSE, &error);
	} else if (start_offline) {
		online = FALSE;
		gconf_client_set_bool (client, key, TRUE, &error);
	} else {
		gboolean value;

		value = gconf_client_get_bool (client, key, &error);
		if (error == NULL)
			online = !value;
	}

	if (error != NULL) {
		g_warning ("%s", error->message);
		g_error_free (error);
	}

	shell = g_object_new (
		E_TYPE_SHELL,
		"name", "org.gnome.Evolution",
		"online", online,
		NULL);

	g_signal_connect (
		shell, "window-destroyed",
		G_CALLBACK (shell_window_destroyed_cb), NULL);

	g_object_unref (client);

	/* EShell keeps its own reference to the first instance for use
	 * in e_shell_get_default(), so it's safe to unreference here. */
	g_object_unref (shell);

	g_idle_add ((GSourceFunc) idle_cb, remaining_args);
}

gint
main (gint argc, gchar **argv)
{
#ifdef G_OS_WIN32
	if (fileno (stdout) != -1 && _get_osfhandle (fileno (stdout)) != -1) {
		/* stdout is fine, presumably redirected to a file or pipe */
	} else {
		typedef BOOL (* WINAPI AttachConsole_t) (DWORD);

		AttachConsole_t p_AttachConsole =
			(AttachConsole_t) GetProcAddress (
			GetModuleHandle ("kernel32.dll"), "AttachConsole");

		if (p_AttachConsole != NULL && p_AttachConsole (ATTACH_PARENT_PROCESS))
      {
			freopen ("CONOUT$", "w", stdout);
			dup2 (fileno (stdout), 1);
			freopen ("CONOUT$", "w", stderr);
			dup2 (fileno (stderr), 2);
		}
	}

	extern void link_shutdown (void);
#endif

	GConfClient *client;
#ifdef DEVELOPMENT
	gboolean skip_warning_dialog;
#endif
	GError *error = NULL;

	/* Make ElectricFence work.  */
	free (malloc (10));

	bindtextdomain (GETTEXT_PACKAGE, EVOLUTION_LOCALEDIR);
	bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
	textdomain (GETTEXT_PACKAGE);

#ifdef G_OS_WIN32
	set_paths ();
#endif

	gtk_init_with_args (
		&argc, &argv,
		_("- The Evolution PIM and Email Client"),
		entries, (gchar *) GETTEXT_PACKAGE, &error);
	if (error != NULL) {
		g_printerr ("%s\n", error->message);
		g_error_free (error);
		exit (1);
	}

	g_type_init ();
	g_thread_init (NULL);
	dbus_g_thread_init ();

#ifdef G_OS_WIN32
	if (strcmp (gettext (""), "") == 0) {
		/* No message catalog installed for the current locale language,
		 * so don't bother with the localisations provided by other things then
		 * either. Reset thread locale to "en-US" and C library locale to "C".
		 */
		SetThreadLocale (MAKELCID (MAKELANGID (LANG_ENGLISH, SUBLANG_ENGLISH_US),
					   SORT_DEFAULT));
		setlocale (LC_ALL, "C");
	}
#endif
	if (start_online && start_offline) {
		g_printerr (_("%s: --online and --offline cannot be used together.\n  Use %s --help for more information.\n"),
			 argv[0], argv[0]);
		exit (1);
	}

	if (force_shutdown)
		shell_force_shutdown ();

	client = gconf_client_get_default ();

#ifdef DEVELOPMENT
	if (force_migrate)
		destroy_config (client);
#endif

	if (disable_preview) {
		gconf_client_set_bool (client, "/apps/evolution/mail/display/show_preview", FALSE, NULL);
		gconf_client_set_bool (client, "/apps/evolution/mail/display/safe_list", TRUE, NULL);
		gconf_client_set_bool (client, "/apps/evolution/addressbook/display/show_preview", FALSE, NULL);
		gconf_client_set_bool (client, "/apps/evolution/calendar/display/show_task_preview", FALSE, NULL);
	}

	setup_segv_redirect ();

	if (evolution_debug_log) {
		gint fd;

		fd = g_open (evolution_debug_log, O_WRONLY | O_CREAT | O_TRUNC, 0600);
		if (fd != -1) {
			dup2 (fd, STDOUT_FILENO);
			dup2 (fd, STDERR_FILENO);
			close (fd);
		} else
			g_warning ("Could not set up debugging output file.");
	}

	glade_init ();
	e_cursors_init ();
	e_icon_factory_init ();
	e_passwords_init ();

	gtk_window_set_default_icon_name ("evolution");

	if (setup_only)
		exit (0);

	categories_icon_theme_hack ();
	gtk_accel_map_load (e_get_accels_filename ());

#ifdef DEVELOPMENT
	skip_warning_dialog = gconf_client_get_bool (
		client, SKIP_WARNING_DIALOG_KEY, NULL);

	if (!skip_warning_dialog && !getenv ("EVOLVE_ME_HARDER"))
		gconf_client_set_bool (
			client, SKIP_WARNING_DIALOG_KEY,
			show_development_warning (), NULL);
#endif

	g_object_unref (client);

	create_default_shell ();

	if (!disable_eplugin) {
		/* Register built-in plugin hook types. */
		es_event_hook_get_type ();
#ifdef ENABLE_PROFILING
		e_profile_event_hook_get_type ();
#endif
		e_plugin_ui_hook_get_type ();

		/* All EPlugin and EPluginHook subclasses should be
		 * registered in GType now, so load plugins now. */
		e_plugin_load_plugins ();
	}

	/* Attempt migration -after- loading all modules and plugins,
	 * as both shell backends and certain plugins hook into this. */
	e_shell_migrate_attempt (default_shell);

	gtk_main ();

	/* Drop what should be the last reference to the shell.
	 * Emit a warning if references are leaking somewhere. */
	g_object_unref (default_shell);
	if (E_IS_SHELL (default_shell))
		g_warning ("Shell not finalized on exit");

	gtk_accel_map_save (e_get_accels_filename ());

	e_icon_factory_shutdown ();
	e_cursors_shutdown ();
#ifdef G_OS_WIN32
	link_shutdown ();
#endif

	return 0;
}