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/* purple
 *
 * Purple is the legal property of its developers, whose names are too numerous
 * to list here.  Please refer to the COPYRIGHT file distributed with this
 * source distribution.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
 */
#include "internal.h"
#include "cipher.h"
#include "certificate.h"
#include "cmds.h"
#include "connection.h"
#include "conversation.h"
#include "core.h"
#include "debug.h"
#include "dnsquery.h"
#include "xfer.h"
#include "glibcompat.h"
#include "http.h"
#include "idle.h"
#include "imgstore.h"
#include "keyring.h"
#include "network.h"
#include "notify.h"
#include "plugin.h"
#include "pounce.h"
#include "prefs.h"
#include "proxy.h"
#include "savedstatuses.h"
#include "signals.h"
#include "smiley-custom.h"
#include "smiley-theme.h"
#include "sound.h"
#include "sound-theme-loader.h"
#include "sslconn.h"
#include "status.h"
#include "stun.h"
#include "theme-manager.h"
#include "util.h"

#ifdef HAVE_DBUS
#  ifndef DBUS_API_SUBJECT_TO_CHANGE
#    define DBUS_API_SUBJECT_TO_CHANGE
#  endif
#  include <dbus/dbus.h>
#  include "dbus-purple.h"
#  include "dbus-server.h"
#  include "dbus-bindings.h"
#endif

struct PurpleCore
{
	char *ui;

	void *reserved;
};

static PurpleCoreUiOps *_ops  = NULL;
static PurpleCore      *_core = NULL;

STATIC_PROTO_INIT

static void
purple_core_print_version(void)
{
	GHashTable *ui_info = purple_core_get_ui_info();
	const gchar *ui_name;
	const gchar *ui_version;
	gchar *ui_full_name = NULL;

	ui_name = ui_info ? g_hash_table_lookup(ui_info, "name") : NULL;
	ui_version = ui_info ? g_hash_table_lookup(ui_info, "version") : NULL;

	if (ui_name) {
		ui_full_name = g_strdup_printf("%s%s%s", ui_name,
			ui_version ? " " : "", ui_version);
	}

	purple_debug_info("main", "Launching %s%slibpurple %s",
		ui_full_name ? ui_full_name : "",
		ui_full_name ? " with " : "",
		purple_core_get_version());

}

gboolean
purple_core_init(const char *ui)
{
	PurpleCoreUiOps *ops;
	PurpleCore *core;

	g_return_val_if_fail(ui != NULL, FALSE);
	g_return_val_if_fail(purple_get_core() == NULL, FALSE);

#ifdef ENABLE_NLS
	bindtextdomain(PACKAGE, LOCALEDIR);
#endif
#ifdef _WIN32
	wpurple_init();
#endif

#if !GLIB_CHECK_VERSION(2, 36, 0)
	/* GLib type system is automaticaly initialized since 2.36. */
	g_type_init();
#endif

	_core = core = g_new0(PurpleCore, 1);
	core->ui = g_strdup(ui);
	core->reserved = NULL;

	ops = purple_core_get_ui_ops();

	/* The signals subsystem is important and should be first. */
	purple_signals_init();

	purple_util_init();

	purple_signal_register(core, "uri-handler",
		purple_marshal_BOOLEAN__POINTER_POINTER_POINTER,
		G_TYPE_BOOLEAN, 3,
		G_TYPE_STRING, /* Protocol */
		G_TYPE_STRING, /* Command */
		G_TYPE_POINTER); /* Parameters (GHashTable *) */

	purple_signal_register(core, "quitting", purple_marshal_VOID, G_TYPE_NONE,
		0);
	purple_signal_register(core, "core-initialized", purple_marshal_VOID,
		G_TYPE_NONE, 0);

	purple_core_print_version();

	/* The prefs subsystem needs to be initialized before static protocols
	 * for protocol prefs to work. */
	purple_prefs_init();

	purple_debug_init();

	if (ops != NULL)
	{
		if (ops->ui_prefs_init != NULL)
			ops->ui_prefs_init();

		if (ops->debug_ui_init != NULL)
			ops->debug_ui_init();
	}

#ifdef HAVE_DBUS
	purple_dbus_init();
#endif

	purple_cmds_init();

	/* Since plugins get probed so early we should probably initialize their
	 * subsystem right away too.
	 */
	purple_plugins_init();

	/* Initialize all static protocols. */
	static_proto_init();

	purple_plugins_probe(G_MODULE_SUFFIX);

	purple_keyring_init(); /* before accounts */
	purple_theme_manager_init();

	/* The buddy icon code uses the imgstore, so init it early. */
	purple_imgstore_init();

	/* Accounts use status, buddy icons and connection signals, so
	 * initialize these before accounts
	 */
	purple_statuses_init();
	purple_buddy_icons_init();
	purple_connections_init();

	purple_accounts_init();
	purple_savedstatuses_init();
	purple_notify_init();
	purple_certificate_init();
	purple_conversations_init();
	purple_blist_init();
	purple_log_init();
	purple_network_init();
	purple_pounces_init();
	purple_proxy_init();
	purple_dnsquery_init();
	purple_sound_init();
	purple_ssl_init();
	purple_stun_init();
	purple_xfers_init();
	purple_idle_init();
	purple_http_init();
	purple_smiley_custom_init();

	/*
	 * Call this early on to try to auto-detect our IP address and
	 * hopefully save some time later.
	 */
	purple_network_get_my_ip(-1);

	if (ops != NULL && ops->ui_init != NULL)
		ops->ui_init();

	/* The UI may have registered some theme types, so refresh them */
	purple_theme_manager_refresh();

	/* Load the buddy list after UI init */
	purple_blist_boot();

	purple_signal_emit(purple_get_core(), "core-initialized");

	return TRUE;
}

void
purple_core_quit(void)
{
	PurpleCoreUiOps *ops;
	PurpleCore *core = purple_get_core();

	g_return_if_fail(core != NULL);

	/* The self destruct sequence has been initiated */
	purple_signal_emit(purple_get_core(), "quitting");

	/* Transmission ends */
	purple_connections_disconnect_all();

	/*
	 * Certificates must be destroyed before the SSL plugins, because
	 * PurpleCertificates contain pointers to PurpleCertificateSchemes,
	 * and the PurpleCertificateSchemes will be unregistered when the
	 * SSL plugin is uninit.
	 */
	purple_certificate_uninit();

	/* The SSL plugins must be uninit before they're unloaded */
	purple_ssl_uninit();

	/* Unload all non-loader, non-prpl plugins before shutting down
	 * subsystems. */
	purple_debug_info("main", "Unloading normal plugins\n");
	purple_plugins_unload(PURPLE_PLUGIN_STANDARD);

	/* Save .xml files, remove signals, etc. */
	purple_smiley_theme_uninit();
	purple_smiley_custom_uninit();
	purple_http_uninit();
	purple_idle_uninit();
	purple_pounces_uninit();
	purple_conversations_uninit();
	purple_blist_uninit();
	purple_notify_uninit();
	purple_connections_uninit();
	purple_buddy_icons_uninit();
	purple_savedstatuses_uninit();
	purple_statuses_uninit();
	purple_accounts_uninit();
	purple_keyring_uninit(); /* after accounts */
	purple_sound_uninit();
	purple_theme_manager_uninit();
	purple_xfers_uninit();
	purple_proxy_uninit();
	purple_dnsquery_uninit();
	purple_imgstore_uninit();
	purple_network_uninit();

	/* Everything after unloading all plugins must not fail if prpls aren't
	 * around */
	purple_debug_info("main", "Unloading all plugins\n");
	purple_plugins_destroy_all();

	ops = purple_core_get_ui_ops();
	if (ops != NULL && ops->quit != NULL)
		ops->quit();

	/* Everything after prefs_uninit must not try to read any prefs */
	purple_prefs_uninit();
	purple_plugins_uninit();
#ifdef HAVE_DBUS
	purple_dbus_uninit();
#endif

	purple_cmds_uninit();
	purple_log_uninit();
	/* Everything after util_uninit cannot try to write things to the
	 * confdir nor use purple_escape_js
	 */
	purple_util_uninit();

	purple_signals_uninit();

	g_free(core->ui);
	g_free(core);

#ifdef _WIN32
	wpurple_cleanup();
#endif

	_core = NULL;
}

gboolean
purple_core_quit_cb(gpointer unused)
{
	purple_core_quit();

	return FALSE;
}

const char *
purple_core_get_version(void)
{
	return VERSION;
}

const char *
purple_core_get_ui(void)
{
	PurpleCore *core = purple_get_core();

	g_return_val_if_fail(core != NULL, NULL);

	return core->ui;
}

PurpleCore *
purple_get_core(void)
{
	return _core;
}

static PurpleCoreUiOps *
purple_core_ui_ops_copy(PurpleCoreUiOps *ops)
{
	PurpleCoreUiOps *ops_new;

	g_return_val_if_fail(ops != NULL, NULL);

	ops_new = g_new(PurpleCoreUiOps, 1);
	*ops_new = *ops;

	return ops_new;
}

GType
purple_core_ui_ops_get_type(void)
{
	static GType type = 0;

	if (type == 0) {
		type = g_boxed_type_register_static("PurpleCoreUiOps",
				(GBoxedCopyFunc)purple_core_ui_ops_copy,
				(GBoxedFreeFunc)g_free);
	}

	return type;
}

void
purple_core_set_ui_ops(PurpleCoreUiOps *ops)
{
	_ops = ops;
}

PurpleCoreUiOps *
purple_core_get_ui_ops(void)
{
	return _ops;
}

#ifdef HAVE_DBUS
static char *purple_dbus_owner_user_dir(void)
{
	DBusMessage *msg = NULL, *reply = NULL;
	DBusConnection *dbus_connection = NULL;
	DBusError dbus_error;
	char *remote_user_dir = NULL;

	if ((dbus_connection = purple_dbus_get_connection()) == NULL)
		return NULL;

	if ((msg = dbus_message_new_method_call(PURPLE_DBUS_SERVICE, PURPLE_DBUS_PATH, PURPLE_DBUS_INTERFACE, "PurpleUserDir")) == NULL)
		return NULL;

	dbus_error_init(&dbus_error);
	reply = dbus_connection_send_with_reply_and_block(dbus_connection, msg, 5000, &dbus_error);
	dbus_message_unref(msg);
	dbus_error_free(&dbus_error);

	if (reply)
	{
		dbus_error_init(&dbus_error);
		dbus_message_get_args(reply, &dbus_error, DBUS_TYPE_STRING, &remote_user_dir, DBUS_TYPE_INVALID);
		remote_user_dir = g_strdup(remote_user_dir);
		dbus_error_free(&dbus_error);
		dbus_message_unref(reply);
	}

	return remote_user_dir;
}

#endif /* HAVE_DBUS */

gboolean
purple_core_ensure_single_instance()
{
	gboolean is_single_instance = TRUE;
#ifdef HAVE_DBUS
	/* in the future, other mechanisms might have already set this to FALSE */
	if (is_single_instance)
	{
		if (!purple_dbus_is_owner())
		{
			const char *user_dir = purple_user_dir();
			char *dbus_owner_user_dir = purple_dbus_owner_user_dir();

			is_single_instance = !purple_strequal(dbus_owner_user_dir, user_dir);
			g_free(dbus_owner_user_dir);
		}
	}
#endif /* HAVE_DBUS */

	return is_single_instance;
}

GHashTable* purple_core_get_ui_info() {
	PurpleCoreUiOps *ops = purple_core_get_ui_ops();

	if(NULL == ops || NULL == ops->get_ui_info)
		return NULL;

	return ops->get_ui_info();
}