/*
 * 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 "tab.h"

static void
tab_list_button_clicked_cb(GtkButton __attribute__((unused)) *button,
	GtkStack *stack)
{
	/* Use gtk_widget_show() and gtk_widget_hide() instead of
	 * gtk_stack_set_visible_child() so that the stack fits the size of only
	 * the visible child. */
	gtk_widget_show(gtk_stack_get_child_by_name(stack, "tab_list"));
	gtk_widget_hide(gtk_stack_get_child_by_name(stack, "buttons"));
}

static void
tab_list_back_button_clicked_cb(GtkButton __attribute__((unused)) *button,
	GtkStack *stack)
{
	/* Use gtk_widget_show() and gtk_widget_hide() instead of
	 * gtk_stack_set_visible_child() so that the stack fits the size of only
	 * the visible child. */
	gtk_widget_show(gtk_stack_get_child_by_name(stack, "buttons"));
	gtk_widget_hide(gtk_stack_get_child_by_name(stack, "tab_list"));
}

#define NEW_BUTTON(BOX, I, NAME, TOOLTIP) \
	do { \
		buttons[I] = gtk_button_new_from_icon_name(NAME, \
			GTK_ICON_SIZE_BUTTON); \
		gtk_widget_set_tooltip_text(buttons[I], TOOLTIP); \
		gtk_widget_set_can_focus(buttons[I], FALSE); \
		gtk_box_pack_start(GTK_BOX(BOX ? all_tabs_button_box : \
					current_tab_button_box), buttons[I], \
			TRUE, FALSE, 0); \
	} while (0)

static gboolean
tab_label_button_press_cb(GtkWidget *widget, GdkEvent *event, MqTab *tab)
{
	GtkWidget *current_tab_button_box;
	GtkWidget *all_tabs_button_box;
	GtkWidget *buttons[8];
	GtkWidget *button_rows_box;
	GtkWidget *tab_list_box;
	GtkWidget *stack;
	GtkWidget *popover;  /* TODO: Add to MqWindow */

	/* Make sure this is a right mouse button press event. */
	if (event->type != GDK_BUTTON_PRESS || event->button.button != 3) {
		return FALSE;
	}

	/* Set up button boxes. */
	current_tab_button_box = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
	all_tabs_button_box    = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
	gtk_widget_set_halign(current_tab_button_box, GTK_ALIGN_CENTER);
	gtk_widget_set_halign(all_tabs_button_box,    GTK_ALIGN_CENTER);

	/* Set up buttons. */
	NEW_BUTTON(0, 0, "view-refresh",       "Reload tab");
	NEW_BUTTON(0, 1, "edit-copy",          "Duplicate tab");
	NEW_BUTTON(0, 2, "window-new",         "Open tab in new window");
	NEW_BUTTON(0, 3, "window-close",       "Close tab");
	NEW_BUTTON(1, 4, "tab-new-symbolic",   "New tab");
	NEW_BUTTON(1, 5, "edit-undo",          "Undo close tab");
	NEW_BUTTON(1, 6, "view-list-symbolic", "Tab list...");

	/* Set up the button rows box. */
	button_rows_box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
	gtk_box_pack_start(GTK_BOX(button_rows_box), current_tab_button_box,
		TRUE, FALSE, 0);
	gtk_box_pack_start(GTK_BOX(button_rows_box), all_tabs_button_box,
		TRUE, FALSE, 0);

	/* Set up tab list box. */
	tab_list_box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);

	/* Set up tab list back button. */
	buttons[7] = gtk_button_new_from_icon_name("go-previous-symbolic",
		GTK_ICON_SIZE_BUTTON);
	gtk_widget_set_tooltip_text(buttons[7], "Back");
	gtk_widget_set_can_focus(buttons[7], FALSE);
	gtk_widget_set_halign(buttons[7], GTK_ALIGN_START);
	gtk_box_pack_start(GTK_BOX(tab_list_box), buttons[7], TRUE, FALSE, 0);

	gtk_box_pack_start(GTK_BOX(tab_list_box), gtk_label_new("Tab list"),
		TRUE, FALSE, 0);

	/* Set up the stack. */
	stack = gtk_stack_new();
	gtk_stack_add_named(GTK_STACK(stack), button_rows_box, "buttons");
	gtk_stack_add_named(GTK_STACK(stack), tab_list_box, "tab_list");

	g_signal_connect(buttons[6], "clicked",
		G_CALLBACK(tab_list_button_clicked_cb), GTK_STACK(stack));
	g_signal_connect(buttons[7], "clicked",
		G_CALLBACK(tab_list_back_button_clicked_cb), GTK_STACK(stack));

	/* Set up the popover. */
	popover = gtk_popover_new(widget);
	gtk_container_add(GTK_CONTAINER(popover), stack);

	/* NB: gtk_popover_popup() is new in GTK+ 3.22. */
	gtk_widget_show_all(popover);
	/* TODO: gtk_widget_hide() tab list */

	return FALSE;
}

#undef NEW_BUTTON

static void
add_tab(MqWindow *window, gchar *uri, gint position)
{
	GtkWidget *tab_label_image;
	GtkWidget *tab_label_label;
	GtkWidget *tab_label;
	MqTab     *tab;
	GtkWidget *tab_label_event_box;
	GtkWidget *tab_widget;

	tab_label_image = gtk_image_new_from_icon_name("text-x-generic",
		GTK_ICON_SIZE_BUTTON);

	tab_label_label = gtk_label_new("New tab");
	gtk_label_set_ellipsize(GTK_LABEL(tab_label_label),
		PANGO_ELLIPSIZE_END);
	gtk_widget_set_hexpand(tab_label_label, TRUE);
	gtk_widget_set_size_request(tab_label_label, 50, 1);

	tab_label = gtk_grid_new();
	gtk_grid_attach(GTK_GRID(tab_label), tab_label_image,
		0, 0, 1, 1);
	gtk_grid_attach(GTK_GRID(tab_label), tab_label_label,
		1, 0, 1, 1);
	gtk_grid_attach(GTK_GRID(tab_label), gtk_button_new_from_icon_name(
			"window-close", GTK_ICON_SIZE_BUTTON), 2, 0, 1, 1);
	gtk_widget_show_all(tab_label);

	tab = mq_tab_new(uri, tab_label_image, tab_label_label);

	tab_label_event_box = gtk_event_box_new();
	g_signal_connect(tab_label_event_box, "button-press-event",
		G_CALLBACK(tab_label_button_press_cb), tab);
	gtk_event_box_set_visible_window(GTK_EVENT_BOX(tab_label_event_box),
		FALSE);
	gtk_container_add(GTK_CONTAINER(tab_label_event_box), tab_label);

	tab_widget = mq_tab_get_container(tab);
	position = gtk_notebook_insert_page(GTK_NOTEBOOK(window->notebook),
		tab_widget, tab_label_event_box, position);
	gtk_notebook_set_tab_reorderable(GTK_NOTEBOOK(window->notebook),
		tab_widget, TRUE);
	gtk_notebook_set_tab_detachable(GTK_NOTEBOOK(window->notebook),
		tab_widget, TRUE);

	mq_tab_update_position(tab, position);
}

static void
update_positions(GtkNotebook __attribute__((unused)) *notebook,
	GtkWidget __attribute__((unused)) *child,
	guint __attribute__((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(gchar **uris)
{
	MqWindow *window;
	guint i;

	window = malloc(sizeof(*window));

	window->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
	gtk_window_set_default_size(GTK_WINDOW(window->window), 1024, 768);
	/* TODO: Don't quit on window close */
	g_signal_connect(window->window, "destroy",
		G_CALLBACK(gtk_main_quit), NULL);

	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, "page-reordered",
		G_CALLBACK(update_positions), window);

	if (uris && uris[0]) {
		for (i = 0; uris && uris[i]; ++i) {
			add_tab(window, uris[i], -1);
		}
	} else {
		add_tab(window, "about:new", -1);
	}

	gtk_widget_show_all(window->window);

	return window;
}