/*
 * Main window
 *
 * Copyright (C) 2017  Patrick McDermott
 *
 * This file is part of Marquee.
 *
 * Marquee 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 3 of the License, or
 * (at your option) any later version.
 *
 * Marquee 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 Marquee.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdlib.h>

#include <gtk/gtk.h>

#include "window.h"
#include "application.h"
#include "tab.h"

static void
is_maximized_cb(GtkWindow *window, GParamSpec G_GNUC_UNUSED *paramspec,
	MqConfig *config)
{
	mq_config_set_boolean(config, "window.maximized",
		gtk_window_is_maximized(window));
	mq_config_save(config);
}

static void
configure_event_cb(GtkWindow G_GNUC_UNUSED *window, GdkEventConfigure *event,
	MqConfig *config)
{
	mq_config_set_integer(config, "window.width", event->width);
	mq_config_set_integer(config, "window.height", event->height);
	mq_config_save(config);
}

static gboolean
window_state_event_cb(GtkWidget G_GNUC_UNUSED *widget,
	GdkEventWindowState *event, MqWindow *window)
{
	window->fullscreen =
		event->new_window_state & GDK_WINDOW_STATE_FULLSCREEN;

	return FALSE;
}

static void
close_confirm_warn_check_button_toggled_cb(GtkToggleButton *toggle_button,
	MqWindow *window)
{
	mq_config_set_boolean(window->config, "tabs.warn-on-close",
		gtk_toggle_button_get_active(toggle_button));
	mq_config_save(window->config);
}

static void
close_confirm_response_cb(GtkWidget *dialog, gint response_id, MqWindow *window)
{
	gtk_widget_destroy(dialog);
	if (response_id == GTK_RESPONSE_OK) {
		gtk_widget_destroy(window->window);
	}
}

static gboolean
delete_event_cb(GtkWindow *widget, GdkEvent G_GNUC_UNUSED *event,
	MqWindow *window)
{
	guint      num_tabs;
	gchar     *message;
	GtkWidget *message_label;
	GtkWidget *check_button;
	GtkWidget *vbox;
	GtkWidget *hbox;
	GtkWidget *dialog;

	num_tabs = mq_window_get_num_tabs(window);

	if (num_tabs == 1) {
		return FALSE;
	}

	if (!mq_config_get_boolean(window->config, "tabs.warn-on-close")) {
		return FALSE;
	}

	/* Message */
	message = g_strdup_printf("You are about to close %d tabs.  "
		"Are you sure you want to continue?", num_tabs);
	message_label = gtk_label_new(message);
	g_free(message);

	/* Check button */
	check_button = gtk_check_button_new_with_mnemonic(
		"_Warn When Closing Multiple Tabs or Windows");
	gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(check_button),
		mq_config_get_boolean(window->config, "tabs.warn-on-close"));
	/* Connect signal after setting initial toggle status, to avoid a
	 * spurious signal. */
	g_signal_connect(check_button, "toggled",
		G_CALLBACK(close_confirm_warn_check_button_toggled_cb),
		window);

	/* Right vertical box (message and check button) */
	vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
	gtk_box_pack_start(GTK_BOX(vbox), message_label, FALSE, FALSE, 0);
	gtk_box_pack_start(GTK_BOX(vbox), check_button, FALSE, FALSE, 0);

	/* Horizontal box (icon and right vertical box) */
	hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
	gtk_box_pack_start(GTK_BOX(hbox), gtk_image_new_from_icon_name(
			"dialog-question", GTK_ICON_SIZE_DIALOG), FALSE, FALSE,
			0);
	gtk_box_pack_start(GTK_BOX(hbox), vbox, FALSE, FALSE, 0);

	/* Dialog */
	dialog = gtk_dialog_new_with_buttons("Confirm Close", widget,
		GTK_DIALOG_DESTROY_WITH_PARENT,
		"_Cancel",     GTK_RESPONSE_CANCEL,
		"Cl_ose Tabs", GTK_RESPONSE_OK,
		NULL);
	gtk_container_add(
		GTK_CONTAINER(gtk_dialog_get_content_area(GTK_DIALOG(dialog))),
		hbox);
	g_signal_connect(dialog, "response",
		G_CALLBACK(close_confirm_response_cb), window);
	gtk_widget_show_all(dialog);

	return TRUE;
}

static void
destroy_cb(GtkWidget G_GNUC_UNUSED *widget, MqWindow *window)
{
	mq_application_delete_window(window->application, window);
}

static void
set_title(MqWindow *window, const gchar *title)
{
	gchar *window_title;

	window_title = g_strdup_printf("%s - Marquee", title);
	gtk_window_set_title(GTK_WINDOW(window->window), window_title);
	g_free(window_title);
}

static void
switch_page_cb(GtkNotebook G_GNUC_UNUSED *notebook,
	GtkWidget G_GNUC_UNUSED *page, guint page_num, MqWindow *window)
{
	window->current_tab = ++page_num;
	
	set_title(window, mq_tab_get_title(mq_tab_seek(window->root_tab,
				page_num)));
}

static void
update_positions(GtkNotebook G_GNUC_UNUSED *notebook,
	GtkWidget G_GNUC_UNUSED *child, guint G_GNUC_UNUSED page_num,
	MqWindow *window)
{
	/* TODO: Once MqWindow has a data structure for tabs, loop through them
	 * all and call mq_tab_update_position(). */
	/* TODO: Should this also update the tabs data structure?  Probably. */

	/* Temporarily "use" window. */
	window = window;
}

MqWindow *
mq_window_new(MqApplication *application, const gchar **uris)
{
	MqWindow *window;
	guint i;

	window = malloc(sizeof(*window));
	window->application = application;
	window->config = mq_application_get_config(application);

	window->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
	if (mq_config_get_boolean(window->config, "window.maximized")) {
		gtk_window_maximize(GTK_WINDOW(window->window));
	} else {
		gtk_window_unmaximize(GTK_WINDOW(window->window));
	}
	gtk_window_set_default_size(GTK_WINDOW(window->window),
		mq_config_get_integer(window->config, "window.width"),
		mq_config_get_integer(window->config, "window.height"));
	g_signal_connect(window->window, "notify::is-maximized",
		G_CALLBACK(is_maximized_cb), window->config);
	g_signal_connect(window->window, "configure-event",
		G_CALLBACK(configure_event_cb), window->config);
	g_signal_connect(window->window, "window-state-event",
		G_CALLBACK(window_state_event_cb), window);
	g_signal_connect(window->window, "delete-event",
		G_CALLBACK(delete_event_cb), window);
	g_signal_connect(window->window, "destroy",
		G_CALLBACK(destroy_cb), window);
	window->fullscreen = FALSE;

	window->notebook = gtk_notebook_new();
	gtk_notebook_set_scrollable(GTK_NOTEBOOK(window->notebook), TRUE);
	gtk_notebook_set_group_name(GTK_NOTEBOOK(window->notebook), "mq-tabs");
	gtk_widget_set_can_focus(window->notebook, FALSE);
	gtk_container_add(GTK_CONTAINER(window->window),
		window->notebook);
	g_signal_connect(window->notebook, "switch-page",
		G_CALLBACK(switch_page_cb), window);
	g_signal_connect(window->notebook, "page-reordered",
		G_CALLBACK(update_positions), window);

	window->root_tab = mq_tab_new_root(window);

	if (uris && uris[0]) {
		for (i = 0; uris && uris[i]; ++i) {
			mq_tab_new_relative(uris[i], window->root_tab);
		}
	} else {
		mq_tab_new_relative(NULL, window->root_tab);
	}

	gtk_widget_show_all(window->window);

	return window;
}

void
mq_window_quit(MqWindow *window)
{
	mq_application_quit(window->application, GTK_WINDOW(window->window));
}

MqApplication *
mq_window_get_application(MqWindow *window)
{
	return window->application;
}

void
mq_window_toggle_fullscreen(MqWindow *window)
{
	if (!window->fullscreen) {
		gtk_window_fullscreen(GTK_WINDOW(window->window));
	} else {
		gtk_window_unfullscreen(GTK_WINDOW(window->window));
	}
}

void
mq_window_insert_tab(MqWindow *window, GtkWidget *tab_page,
	GtkWidget *tab_label, gint position)
{
	gtk_notebook_insert_page(GTK_NOTEBOOK(window->notebook),
		tab_page, tab_label, position - 1);
	gtk_notebook_set_tab_reorderable(GTK_NOTEBOOK(window->notebook),
		tab_page, TRUE);
	gtk_notebook_set_tab_detachable(GTK_NOTEBOOK(window->notebook),
		tab_page, TRUE);
	gtk_widget_show_all(tab_page);
	gtk_widget_show_all(tab_label);
}

void
mq_window_set_current_tab(MqWindow *window, guint tab)
{
	window->current_tab = tab;
	gtk_notebook_set_current_page(GTK_NOTEBOOK(window->notebook), tab - 1);
}

guint
mq_window_get_current_tab(MqWindow *window)
{
	return window->current_tab;
}

guint
mq_window_get_num_tabs(MqWindow *window)
{
	return mq_tab_get_tree_size(window->root_tab) - 1;
}

void
mq_window_update_tab_title(MqWindow *window, guint position, const gchar *title)
{
	if (position == window->current_tab) {
		set_title(window, title);
	}
}

void
mq_window_scroll_tab_labels(MqWindow *window)
{
	mq_tab_scroll_tab_labels(window->root_tab);
}

void
mq_window_begin_scrolling_tab_labels(MqWindow *window)
{
	mq_tab_begin_scrolling_tab_labels(window->root_tab);
}

void
mq_window_end_scrolling_tab_labels(MqWindow *window)
{
	mq_tab_end_scrolling_tab_labels(window->root_tab);
}