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/*
 * System tray icon (aka docklet) plugin for Gaim
 *
 * Copyright (C) 2002-3 Robert McQueen <robot101@debian.org>
 * Copyright (C) 2003 Herman Bloggs <hermanator12002@yahoo.com>
 * Inspired by a similar plugin by:
 *  John (J5) Palmieri <johnp@martianrock.com>
 *
 * 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.
 */
#include "internal.h"
#include "gtkgaim.h"

#include "core.h"
#include "conversation.h"
#include "debug.h"
#include "prefs.h"
#include "signals.h"
#include "sound.h"
#include "version.h"

#include "gtkaccount.h"
#include "gtkblist.h"
#include "gtkconv.h"
#include "gtkft.h"
#include "gtkplugin.h"
#include "gtkprefs.h"
#include "gtksound.h"
#include "gtkutils.h"
#include "gtkstock.h"
#include "docklet.h"

#include "gaim.h"
#include "gtkdialogs.h"

#define DOCKLET_PLUGIN_ID "gtk-docklet"

/* globals */
GaimPlugin *handle = NULL;
static struct docklet_ui_ops *ui_ops = NULL;
static DockletStatus status = DOCKLET_STATUS_OFFLINE;
static gulong gtkblist_delete_cb_id = 0;
static gboolean enable_join_chat = FALSE;

/**************************************************************************
 * docklet status and utility functions
 **************************************************************************/
static gboolean
docklet_blink_icon()
{
	static gboolean blinked = FALSE;
	gboolean ret = FALSE; /* by default, don't keep blinking */

	blinked = !blinked;

	switch (status) {
		case DOCKLET_STATUS_ONLINE_PENDING:
		case DOCKLET_STATUS_AWAY_PENDING:
			if (blinked) {
				if (ui_ops && ui_ops->blank_icon)
					ui_ops->blank_icon();
			} else {
				if (ui_ops && ui_ops->update_icon)
					ui_ops->update_icon(status);
			}
			ret = TRUE; /* keep blinking */
			break;
		default:
			blinked = FALSE;
			break;
	}

	return ret;
}

static gboolean
docklet_update_status()
{
	GList *l;
	DockletStatus newstatus = DOCKLET_STATUS_OFFLINE;
	gboolean pending = FALSE;

	/* determine if any ims have unseen messages */
	for(l = gaim_get_ims(); l!=NULL; l=l->next) {
		GaimConversation *conv = (GaimConversation*)l->data;
		if(GAIM_IS_GTK_CONVERSATION(conv)) {
			if(GAIM_GTK_CONVERSATION(conv)->unseen_state!=GAIM_UNSEEN_NONE) {
				pending = TRUE;
				break;
			}
		}
	}

	/* iterate through all accounts and determine which
	 * status to show in the tray icon based on the following
	 * ranks (highest encountered rank will be used):
	 *
	 *     1) OFFLINE
	 *     2) ONLINE
	 *     3) ONLINE_PENDING
	 *     4) AWAY
	 *     5) AWAY_PENDING
	 *     6) CONNECTING
	 */
	for(l = gaim_accounts_get_all(); l!=NULL; l=l->next) {
		DockletStatus tmpstatus = DOCKLET_STATUS_OFFLINE;

		GaimAccount *account = (GaimAccount*)l->data;
		GaimStatus *account_status;

		if (!gaim_account_get_enabled(account, GAIM_GTK_UI))
			continue;

		if(gaim_account_is_disconnected(account))
			continue;

		account_status = gaim_account_get_active_status(account);

		if(gaim_account_is_connecting(account)) {
			tmpstatus = DOCKLET_STATUS_CONNECTING;
		}
		else if(gaim_status_is_online(account_status)) {
			if(!gaim_status_is_available(account_status)) {
				if(pending)
					tmpstatus = DOCKLET_STATUS_AWAY_PENDING;
				else
					tmpstatus = DOCKLET_STATUS_AWAY;
			}
			else {
				if(pending)
					tmpstatus = DOCKLET_STATUS_ONLINE_PENDING;
				else
					tmpstatus = DOCKLET_STATUS_ONLINE;
			}
		}

		if(tmpstatus>newstatus) newstatus=tmpstatus;
	}

	/* update the icon if we changed status */
	if (status != newstatus) {
		status = newstatus;

		if (ui_ops && ui_ops->update_icon)
			ui_ops->update_icon(status);

		/* and schedule the blinker function if messages are pending */
		if (status == DOCKLET_STATUS_ONLINE_PENDING 
				|| status == DOCKLET_STATUS_AWAY_PENDING) {
			g_timeout_add(500, docklet_blink_icon, &handle);
		}
	}

	return FALSE; /* for when we're called by the glib idle handler */
}

static gboolean
online_account_supports_chat()
{
	GList *c = NULL;
	c = gaim_connections_get_all();

	while(c!=NULL) {
		GaimConnection *gc = c->data;
		if(GAIM_PLUGIN_PROTOCOL_INFO(gc->prpl)->chat_info!=NULL)
			return TRUE;
		c = c->next;
	}

	return FALSE;
}

static gboolean
focus_first_unseen_conv()
{
	GList *l;
	GaimConversation *conv;
	GaimGtkConversation *gtkconv;

	/* find first im with unseen messages */
	for(l = gaim_get_ims(); l!=NULL; l=l->next) {
		conv = (GaimConversation*)l->data;
		if(GAIM_IS_GTK_CONVERSATION(conv)) {
			gtkconv=GAIM_GTK_CONVERSATION(conv);
			if(gtkconv->unseen_state!=GAIM_UNSEEN_NONE) {
				gtkconv->active_conv=conv;
				gaim_gtk_conv_window_switch_gtkconv(gtkconv->win, gtkconv);
				gaim_gtk_conv_window_raise(gtkconv->win);
				gtk_window_present(GTK_WINDOW(gtkconv->win->window));
				return TRUE;
			}
		}
	}

	return FALSE;
}

/**************************************************************************
 * minimize to and unminimize from the tray icon
 **************************************************************************/
static void
minimize_to_tray()
{
	GaimGtkBuddyList *blist = gaim_gtk_blist_get_default_gtk_blist();

	if(!blist || !blist->window)
		return;

	if (ui_ops && ui_ops->minimize)
		ui_ops->minimize(blist->window);

	gaim_prefs_set_bool("/gaim/gtk/blist/list_visible", FALSE);
	gtk_widget_hide(blist->window);

	docklet_update_status();
}

static void
unminimize_from_tray()
{
	GaimGtkBuddyList *blist = gaim_gtk_blist_get_default_gtk_blist();

	if(!blist || !blist->window)
		return;

	if (ui_ops && ui_ops->maximize)
		ui_ops->maximize(blist->window);

	gaim_blist_set_visible(TRUE);

	docklet_update_status();
}

static void
docklet_toggle_blist()
{
	if(gaim_prefs_get_bool("/gaim/gtk/blist/list_visible"))
		minimize_to_tray();
	else
		unminimize_from_tray();
}

/**************************************************************************
 * callbacks and signal handlers
 **************************************************************************/
/* catch delete events on gtkblist and hide it instead */
static gboolean
gtkblist_delete_cb(GtkWidget *widget) {
	gaim_debug(GAIM_DEBUG_INFO, "docklet", "hiding buddy list\n");
	minimize_to_tray(widget);
	return TRUE;
}

/* connect to delete signal when gtkblist is created */
static void
gtkblist_created_cb(GaimBuddyList *list)
{
	if(list!=NULL && GAIM_IS_GTK_BLIST(list) && 
			GAIM_GTK_BLIST(list)->window!=NULL && 
			gtkblist_delete_cb_id==0) {

		gtkblist_delete_cb_id = g_signal_connect(G_OBJECT(GAIM_GTK_BLIST(list)->window), 
				"delete_event", G_CALLBACK(gtkblist_delete_cb), NULL);
	}
}

static void 
gaim_quit_cb() 
{
	/* TODO: confirm quit while pending */
}

static void
docklet_update_status_cb(void *data, ...)
{
	/* The odd function arguments allow this callback to be used for
	 * any signal which has a pointer as the first callback parameter.
	 * Although ugly, it allows this single callback to be used instead
	 * of multiple functions with different signatures that do the same 
	 * thing.
	 */
	docklet_update_status();
}

static void
docklet_conv_updated_cb(GaimConversation *conv, GaimConvUpdateType type)
{
	if(type==GAIM_CONV_UPDATE_UNSEEN)
		docklet_update_status();
}

static void
docklet_signed_on_cb(GaimConnection *gc)
{
	if(!enable_join_chat) {
		if(GAIM_PLUGIN_PROTOCOL_INFO(gc->prpl)->chat_info!=NULL)
			enable_join_chat = TRUE;
	}
	docklet_update_status();
}

static void
docklet_signed_off_cb(GaimConnection *gc)
{
	if(enable_join_chat) {
		if(GAIM_PLUGIN_PROTOCOL_INFO(gc->prpl)->chat_info!=NULL)
			enable_join_chat = online_account_supports_chat();
	}
	docklet_update_status();
}

/**************************************************************************
 * docklet pop-up menu
 **************************************************************************/
static void
docklet_toggle_mute(GtkWidget *toggle, void *data)
{
	gaim_prefs_set_bool("/gaim/gtk/sound/mute", GTK_CHECK_MENU_ITEM(toggle)->active);
}

#ifdef _WIN32
/* This is a workaround for a bug in windows GTK+. Clicking outside of the
   menu does not get rid of it, so instead we get rid of it as soon as the
   pointer leaves the menu. */
static gboolean 
hide_docklet_menu(gpointer data)
{
	if (data != NULL) {
		gtk_menu_popdown(GTK_MENU(data));
	}
	return FALSE;
}

static gboolean
docklet_menu_leave_enter(GtkWidget *menu, GdkEventCrossing *event, void *data)
{
	static guint hide_docklet_timer = 0;
	if (event->type == GDK_LEAVE_NOTIFY && event->detail == GDK_NOTIFY_ANCESTOR) {
		gaim_debug(GAIM_DEBUG_INFO, "docklet", "menu leave-notify-event\n");
		/* Add some slop so that the menu doesn't annoyingly disappear when mousing around */
		if (hide_docklet_timer == 0) {
			hide_docklet_timer = gaim_timeout_add(500,
					hide_docklet_menu, menu);
		}
	} else if (event->type == GDK_ENTER_NOTIFY && event->detail == GDK_NOTIFY_ANCESTOR) {
		gaim_debug(GAIM_DEBUG_INFO, "docklet", "menu enter-notify-event\n");
		if (hide_docklet_timer != 0) {
			/* Cancel the hiding if we reenter */

			gaim_timeout_remove(hide_docklet_timer);
			hide_docklet_timer = 0;
		}
	}
	return FALSE;
}
#endif

static void 
docklet_menu() {
	static GtkWidget *menu = NULL;
	GtkWidget *entry;
	GtkWidget *menuitem;

	if (menu) {
		gtk_widget_destroy(menu);
	}

	menu = gtk_menu_new();

	entry = gtk_check_menu_item_new_with_label(_("Show Buddy List"));
	gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(entry), gaim_prefs_get_bool("/gaim/gtk/blist/list_visible"));
	g_signal_connect(G_OBJECT(entry), "toggled", G_CALLBACK(docklet_toggle_blist), NULL);
	gtk_menu_shell_append(GTK_MENU_SHELL(menu), entry);

	gaim_separator(menu);

	menuitem = gaim_new_item_from_stock(menu, _("New Message..."), GAIM_STOCK_IM, G_CALLBACK(gaim_gtkdialogs_im), NULL, 0, 0, NULL);
	if(status == DOCKLET_STATUS_OFFLINE)
		gtk_widget_set_sensitive(menuitem, FALSE);

	menuitem = gaim_new_item_from_stock(menu, _("Join A Chat..."), GAIM_STOCK_CHAT, G_CALLBACK(gaim_gtk_blist_joinchat_show), NULL, 0, 0, NULL);
	gtk_widget_set_sensitive(menuitem, enable_join_chat);

	gaim_separator(menu);

	entry = gtk_check_menu_item_new_with_label(_("Mute Sounds"));
	gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(entry), gaim_prefs_get_bool("/gaim/gtk/sound/mute"));
	if (!strcmp(gaim_prefs_get_string("/gaim/gtk/sound/method"), "none"))
		gtk_widget_set_sensitive(GTK_WIDGET(entry), FALSE);
	g_signal_connect(G_OBJECT(entry), "toggled", G_CALLBACK(docklet_toggle_mute), NULL);
	gtk_menu_shell_append(GTK_MENU_SHELL(menu), entry);

	gaim_new_item_from_stock(menu, _("File Transfers"), GAIM_STOCK_FILE_TRANSFER, G_CALLBACK(gaim_show_xfer_dialog), NULL, 0, 0, NULL);
	gaim_new_item_from_stock(menu, _("Accounts"), GAIM_STOCK_ACCOUNTS, G_CALLBACK(gaim_gtk_accounts_window_show), NULL, 0, 0, NULL);
	gaim_new_item_from_stock(menu, _("Preferences"), GTK_STOCK_PREFERENCES, G_CALLBACK(gaim_gtk_prefs_show), NULL, 0, 0, NULL);

	gaim_separator(menu);

	/* TODO: need a submenu to change status, this needs to "link" 
	 * to the status in the buddy list gtkstatusbox
	 */

	gaim_new_item_from_stock(menu, _("Quit"), GTK_STOCK_QUIT, G_CALLBACK(gaim_core_quit), NULL, 0, 0, NULL);

#ifdef _WIN32
	g_signal_connect(menu, "leave-notify-event", G_CALLBACK(docklet_menu_leave_enter), NULL);
	g_signal_connect(menu, "enter-notify-event", G_CALLBACK(docklet_menu_leave_enter), NULL);
#endif
	gtk_widget_show_all(menu);
	gtk_menu_popup(GTK_MENU(menu), NULL, NULL,
				   ui_ops->position_menu,
				   NULL, 0, gtk_get_current_event_time());
}

/**************************************************************************
 * public api for ui_ops
 **************************************************************************/
void
docklet_clicked(int button_type)
{
	switch (button_type) {
		case 1:
			if(status==DOCKLET_STATUS_ONLINE_PENDING 
					|| status==DOCKLET_STATUS_AWAY_PENDING)
				focus_first_unseen_conv();
			else
				docklet_toggle_blist();
			break;
		case 3:
			docklet_menu();
			break;
	}
}

void
docklet_embedded()
{
	docklet_update_status();
	if (ui_ops && ui_ops->update_icon)
		ui_ops->update_icon(status);
}

void
docklet_remove(gboolean visible)
{
	unminimize_from_tray();
}

void
docklet_unload()
{
	gaim_plugin_unload(handle);
}

void
docklet_set_ui_ops(struct docklet_ui_ops *ops)
{
	ui_ops = ops;
}

/**************************************************************************
 * plugin glue
 **************************************************************************/
static gboolean
plugin_load(GaimPlugin *plugin)
{
	void *conn_handle = gaim_connections_get_handle();
	void *conv_handle = gaim_conversations_get_handle();
	void *accounts_handle = gaim_accounts_get_handle();
	void *core_handle = gaim_get_core();

	gaim_debug(GAIM_DEBUG_INFO, "docklet", "plugin loaded\n");

	handle = plugin;

	docklet_ui_init();
	if (ui_ops && ui_ops->create)
		ui_ops->create();

	gaim_signal_connect(conn_handle, "signed-on",
						plugin, GAIM_CALLBACK(docklet_signed_on_cb), NULL);
	gaim_signal_connect(conn_handle, "signed-off",
						plugin, GAIM_CALLBACK(docklet_signed_off_cb), NULL);
	gaim_signal_connect(accounts_handle, "account-connecting",
						plugin, GAIM_CALLBACK(docklet_update_status_cb), NULL);
	gaim_signal_connect(accounts_handle, "account-status-changed",
						plugin, GAIM_CALLBACK(docklet_update_status_cb), NULL);
	gaim_signal_connect(conv_handle, "received-im-msg",
						plugin, GAIM_CALLBACK(docklet_update_status_cb), NULL);
	gaim_signal_connect(conv_handle, "conversation-created",
						plugin, GAIM_CALLBACK(docklet_update_status_cb), NULL);
	gaim_signal_connect(conv_handle, "conversation-updated",
						plugin, GAIM_CALLBACK(docklet_conv_updated_cb), NULL);

	gaim_signal_connect(gaim_gtk_blist_get_handle(), "gtkblist-created",
						plugin, GAIM_CALLBACK(gtkblist_created_cb), NULL);
	gtkblist_created_cb(gaim_get_blist());

	gaim_signal_connect(core_handle, "quitting",
						plugin, GAIM_CALLBACK(gaim_quit_cb), NULL);

	enable_join_chat = online_account_supports_chat();

	if(!gaim_prefs_get_bool("/gaim/gtk/blist/list_visible"))
		minimize_to_tray();

	return TRUE;
}

static gboolean
plugin_unload(GaimPlugin *plugin)
{
	GaimGtkBuddyList *gtkblist = gaim_gtk_blist_get_default_gtk_blist();

	if (ui_ops && ui_ops->destroy)
		ui_ops->destroy();

	/* remove callbacks */
    gaim_signals_disconnect_by_handle(handle);
	if(gtkblist_delete_cb_id!=0)
		g_signal_handler_disconnect(G_OBJECT(gtkblist->window), gtkblist_delete_cb_id);
	gtkblist_delete_cb_id = 0;

	unminimize_from_tray();

	gaim_debug(GAIM_DEBUG_INFO, "docklet", "plugin unloaded\n");

	return TRUE;
}

static GaimPluginInfo info =
{
	GAIM_PLUGIN_MAGIC,
	GAIM_MAJOR_VERSION,
	GAIM_MINOR_VERSION,
	GAIM_PLUGIN_STANDARD,                             /**< type           */
	GAIM_GTK_PLUGIN_TYPE,                             /**< ui_requirement */
	0,                                                /**< flags          */
	NULL,                                             /**< dependencies   */
	GAIM_PRIORITY_DEFAULT,                            /**< priority       */

	DOCKLET_PLUGIN_ID,                                /**< id             */
	N_("System Tray Icon"),                           /**< name           */
	VERSION,                                          /**< version        */
	                                                  /**  summary        */
	N_("Displays an icon for Gaim in the system tray."),
	                                                  /**  description    */
	N_("Displays a system tray icon (in GNOME, KDE or Windows for example) "
	   "to show the current status of Gaim, allow fast access to commonly "
	   "used functions, and to toggle display of the buddy list or login "
	   "window. Also allows messages to be queued until the icon is "
	   "clicked, similar to ICQ."),
	"Robert McQueen <robot101@debian.org>",           /**< author         */
	GAIM_WEBSITE,                                     /**< homepage       */

	plugin_load,                                      /**< load           */
	plugin_unload,                                    /**< unload         */
	NULL,                                             /**< destroy        */

	NULL,                                             /**< ui_info        */
	NULL,                                             /**< extra_info     */
	NULL,
	NULL
};

static void
plugin_init(GaimPlugin *plugin)
{
	/* TODO: these will be removed once queuing is working in the ui */
	gaim_prefs_add_none("/plugins/gtk/docklet");
	gaim_prefs_add_bool("/plugins/gtk/docklet/queue_messages", FALSE);
}

GAIM_INIT_PLUGIN(docklet, plugin_init, info)