/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
/* this file is part of evince, a gnome document viewer
 *
 *
 * Evince 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.
 *
 * Evince 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 02110-1301, USA.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

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

#include "ev-dualscreen.h"
#include "ev-window.h"
#include "ev-view.h"
#include "ev-view-presentation.h"
#include "ev-utils.h"
#include "ev-sidebar.h"
#include "ev-sidebar-thumbnails.h"

struct _EvDSCWindowPrivate {
	GtkWidget *main_box;
	GtkWidget *menubar;
	GtkWidget *overview;
	GtkWidget *notesview;
	EvDocumentModel *model;
	EvDocument * notesdocument;

	GtkWidget *overview_scrolled_window;
	GtkWidget *notesview_scrolled_window;
	GtkWidget *presentation_window;

	EvViewPresentation *presentation_view;
	EvDocument * presentation_document;
	gint moveback_monitor;
};

#define EV_DSCWINDOW_GET_PRIVATE(object) \
	(G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_DSCWINDOW, EvDSCWindowPrivate))
#define PAGE_CACHE_SIZE 52428800 /* 50MB */
#define SIDEBAR_DEFAULT_SIZE    132

/*static gpointer parent_class = NULL;*/

G_DEFINE_TYPE (EvDSCWindow, ev_dscwindow, GTK_TYPE_WINDOW)

/**
 * ev_dscwindow_switch_monitors: Bring the presentation window and the control window each on the other monitor.
 *
 * @widget: Callback widget
 * @self: EvDSCWindow
 **/
static gboolean
ev_dscwindow_switch_monitors (GtkWidget *widget, EvDSCWindow *self)
{
/*
+	if (!EV_IS_DSCWINDOW (self))
+		return FALSE;
+
+	EvDSCWindowPrivate *priv = EV_DSCWINDOW_GET_PRIVATE (self);
+
+	gint num_monitors = get_num_monitors (GTK_WINDOW (self));
+
+	if (num_monitors == 2) {
+		GtkWindow * presentation_window = GTK_WINDOW (priv->presentation_window);
+		GdkScreen * screen = gtk_window_get_screen (presentation_window);
+
+		gint monitor_1 = gdk_screen_get_monitor_at_window (screen,
+			GTK_WIDGET (presentation_window)->window);
+
+		gint monitor_2 = (monitor_1 + 1) % 2;
+
+		GdkRectangle coords;
+		gdk_screen_get_monitor_geometry (screen, monitor_2, &coords);
+		ev_window_stop_presentation (priv->presentation_window);
+		gtk_window_move (presentation_window, coords.x, coords.y);
+		ev_window_run_presentation (priv->presentation_window);
+		priv->moveback_monitor = monitor_1;
+
+		gdk_screen_get_monitor_geometry (screen, monitor_1, &coords);
+		gtk_window_unmaximize (GTK_WINDOW (self));
+		gtk_window_move (GTK_WINDOW (self), coords.x, coords.y);
+		gtk_window_maximize (GTK_WINDOW (self));
+	}*/
	return TRUE;
}

/**
 * ev_dscwindow_notes_interaction: User wants to load a different file as notes.
 **/
static gboolean
ev_dscwindow_notes_interaction (GtkContainer *container, EvDSCWindow *self)
{
/*
+	EvDSCWindowPrivate *priv = EV_DSCWINDOW_GET_PRIVATE (self);
+	GtkWidget *dialog;
+
+	dialog = gtk_file_chooser_dialog_new (
+		_("Open Document"),
+		GTK_WINDOW (self),
+		GTK_FILE_CHOOSER_ACTION_OPEN,
+		GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT,
+		GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
+		NULL);
+
+	ev_document_factory_add_filters (dialog, NULL);
+	gtk_file_chooser_set_select_multiple (GTK_FILE_CHOOSER (dialog), FALSE);
+	gtk_file_chooser_set_local_only (GTK_FILE_CHOOSER (dialog), TRUE);
+
+	if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_ACCEPT)
+	{
+		char * uri = gtk_file_chooser_get_uri (GTK_FILE_CHOOSER (dialog));
+		GError * error = NULL;
+		ev_view_set_loading (EV_VIEW (priv->notesview), TRUE);
+
+		if (priv->notesdocument) {
+			ev_document_load (priv->notesdocument, uri, &error);
+		} else {
+			priv->notesdocument = ev_document_factory_get_document (uri,
+				&error);
+		}
+		g_free (uri);
+		if (error == NULL){
+			ev_view_set_document (EV_VIEW (priv->notesview),
+				priv->notesdocument);
+			/* TODO: go to the same page that is open at the moment, or
+			 * move the presentation to the beginning. *//*
+		}
+	}
+	gtk_widget_destroy (dialog);
*/
	return TRUE;
}

/**
 * ev_dscwindow_get_control: Get the control instance.
 *
 * If there is none, create one.
 *
 * Returns: control instance
 **/
EvDSCWindow *
ev_dscwindow_get_control (void)
{
	static EvDSCWindow * control = NULL;

	if (!control || !EV_IS_DSCWINDOW (control)) {
		control = EV_DSCWINDOW (g_object_new (EV_TYPE_DSCWINDOW, NULL));
	}

	return control;
}

/*TODO: Fix me!*/
static void
ev_dscwindow_window_placement (EvDSCWindow *ev_dscwindow)
{
	gint num_monitors = get_num_monitors (GTK_WINDOW (ev_dscwindow));
	g_printf ("num_monitors: %d \n",num_monitors);
	//if (num_monitors == 2) {
		GtkWindow * presentation_window = GTK_WINDOW (ev_dscwindow->priv->presentation_window);
		GdkScreen * screen = gtk_window_get_screen (presentation_window);
		gint work_monitor = gdk_screen_get_monitor_at_window (screen,
			gtk_widget_get_window (GTK_WIDGET (presentation_window)));
		gint presentation_monitor = (work_monitor + 1) % 2;
		GdkRectangle coords;
		gdk_screen_get_monitor_geometry (screen, presentation_monitor,
			&coords);

		gtk_window_move (presentation_window, coords.x, coords.y);
		//ev_window_run_presentation (ev_dscwindow->priv->presentation_window);
		ev_dscwindow->priv->moveback_monitor = work_monitor;
		gtk_window_maximize (GTK_WINDOW (ev_dscwindow));
	//}
}
/**
 * ev_dscwindow_page_changed_cb: Callback to change page on all views
 *
 **/
static void
ev_dscwindow_page_changed_cb (EvDocumentModel *model,
			   GParamSpec      *pspec,
			   EvDSCWindow     *ev_dscwindow)
{
	gint page = ev_document_model_get_page (model);
	g_printf("page:%d\n",page);

	ev_view_presentation_set_page (EV_VIEW_PRESENTATION(ev_dscwindow->priv->presentation_view), page);
}
static void
ev_dscwindow_presentation_page_changed_cb (EvDocumentModel *model,
			   GParamSpec      *pspec,
			   EvDSCWindow     *ev_dscwindow)
{
	gint page = ev_view_presentation_get_current_page (ev_dscwindow->priv->presentation_view);
	ev_document_model_set_page (ev_dscwindow->priv->model, page);
}

/**
 * ev_dscwindow_set_presentation: Set presentation document
 * @presentation_window: Main window we can reuse for presentation
 **/
void
ev_dscwindow_set_presentation (EvDSCWindow *ev_dscwindow,
	EvWindow *presentation_window, EvDocument *document, EvViewPresentation *pview)
{
	if (!EV_IS_WINDOW (presentation_window))
		return;

	ev_dscwindow->priv->presentation_window = GTK_WIDGET(presentation_window);
	ev_dscwindow->priv->presentation_document = document;
	ev_dscwindow->priv->presentation_view = EV_VIEW_PRESENTATION(pview);
	g_signal_connect (ev_dscwindow->priv->presentation_view,
			  "notify::page",
			  G_CALLBACK (ev_dscwindow_presentation_page_changed_cb),
			  ev_dscwindow);
	ev_document_model_set_document(ev_dscwindow->priv->model,
		document);
	ev_dscwindow_window_placement (ev_dscwindow);
}

/**
 * ev_dscwindow_end: Stop presentation mode.
 */
static gboolean
ev_dscwindow_end (GtkWidget *widget, GdkEvent *event)
{
	gtk_widget_destroy (GTK_WIDGET (ev_dscwindow_get_control ()));
	return TRUE;
}

/**
* ev_dscwindow_init: Initialize multihead presentation
*
* @ev_dscwindow: EvDSCWindow.
*
* ev_dscwindow_set_presentation has to be called afterwards for loading in a document. TBD
**/
static void
ev_dscwindow_init (EvDSCWindow *ev_dscwindow)
{
	ev_dscwindow->priv = EV_DSCWINDOW_GET_PRIVATE (ev_dscwindow);
	ev_dscwindow->priv->moveback_monitor = -1;
	ev_dscwindow->priv->notesdocument = NULL;

	gtk_window_set_title (GTK_WINDOW (ev_dscwindow), _("Presentation Control"));

	GtkWidget *h = gtk_hpaned_new ();
	GtkWidget *v = gtk_vbox_new (FALSE, 0);

	ev_dscwindow->priv->model = ev_document_model_new ();
	g_signal_connect (ev_dscwindow->priv->model,
			  "notify::page",
			  G_CALLBACK (ev_dscwindow_page_changed_cb),
			  ev_dscwindow);
	ev_dscwindow->priv->overview = ev_sidebar_new ();
	ev_sidebar_set_model (EV_SIDEBAR (ev_dscwindow->priv->overview),
			      ev_dscwindow->priv->model);
	gtk_box_pack_start (GTK_BOX (v), ev_dscwindow->priv->overview, TRUE , TRUE, 0);
	gtk_widget_show (ev_dscwindow->priv->overview);

	GtkWidget *sidebar_widget;
	sidebar_widget = ev_sidebar_thumbnails_new ();
	/*g_signal_connect (sidebar_widget,
			  "notify::main-widget",
			  G_CALLBACK (sidebar_page_main_widget_update_cb),
			  ev_window);
	sidebar_page_main_widget_update_cb (G_OBJECT (sidebar_widget), NULL, ev_window);*/
	gtk_widget_show (sidebar_widget);
	ev_sidebar_add_page (EV_SIDEBAR (ev_dscwindow->priv->overview),
			     sidebar_widget);

/*	ev_dscwindow->priv->overview_scrolled_window = GTK_WIDGET (g_object_new (
			GTK_TYPE_SCROLLED_WINDOW, "shadow-type", GTK_SHADOW_IN, NULL));
	gtk_box_pack_start (GTK_BOX (v), ev_dscwindow->priv->overview_scrolled_window, TRUE, TRUE, 0);


	ev_dscwindow->priv->overview = ev_view_new ();
	ev_view_set_page_cache_size (EV_VIEW (ev_dscwindow->priv->overview), PAGE_CACHE_SIZE);
	ev_view_set_model (EV_VIEW (ev_dscwindow->priv->overview), ev_dscwindow->priv->model);*/

	ev_document_model_set_continuous (ev_dscwindow->priv->model, TRUE);
	ev_document_model_set_dual_page (ev_dscwindow->priv->model, FALSE);
	ev_document_model_set_sizing_mode (ev_dscwindow->priv->model, EV_SIZING_BEST_FIT);

	GtkWidget *e = gtk_expander_new (_("Expensive features"));
	gtk_expander_set_expanded (GTK_EXPANDER (e), TRUE);

	GtkWidget *t = gtk_toolbar_new ();

	GtkToolItem* b_switch = gtk_tool_button_new (NULL, _("Switch monitors"));
	gtk_tool_button_set_icon_name (GTK_TOOL_BUTTON (b_switch), "object-flip-horizontal");
	gtk_toolbar_insert (GTK_TOOLBAR (t), b_switch, -1);
	g_signal_connect (b_switch, "clicked",
		G_CALLBACK (ev_dscwindow_switch_monitors), ev_dscwindow);

	GtkToolItem* b_notes = gtk_tool_button_new (NULL, _("Load notes ..."));
	gtk_tool_button_set_icon_name (GTK_TOOL_BUTTON (b_notes), "object-flip-horizontal");
	gtk_toolbar_insert (GTK_TOOLBAR (t), b_notes, -1);
	g_signal_connect (b_notes, "clicked",
		G_CALLBACK (ev_dscwindow_notes_interaction), ev_dscwindow);

	GtkToolItem* b_close = gtk_tool_button_new (NULL, _("End presentation"));
	gtk_tool_button_set_icon_name (GTK_TOOL_BUTTON (b_close), "view-restore");
	gtk_toolbar_insert (GTK_TOOLBAR (t), b_close, -1);
	g_signal_connect (b_close, "clicked",
		G_CALLBACK (ev_dscwindow_end), NULL);

	gtk_container_add (GTK_CONTAINER (e), t);
	gtk_box_pack_end (GTK_BOX (v), e, FALSE, TRUE, 0);
	gtk_paned_add1 (GTK_PANED (h), v);

	ev_dscwindow->priv->notesview_scrolled_window = GTK_WIDGET (g_object_new (
		GTK_TYPE_SCROLLED_WINDOW, "shadow-type", GTK_SHADOW_IN, NULL));
	gtk_paned_add2 (GTK_PANED (h), ev_dscwindow->priv->notesview_scrolled_window);

	ev_dscwindow->priv->notesview = ev_view_new ();
	g_object_ref (ev_dscwindow->priv->notesview);
	gtk_container_add (GTK_CONTAINER (ev_dscwindow->priv->notesview_scrolled_window),
		ev_dscwindow->priv->notesview);
	ev_view_set_model (EV_VIEW (ev_dscwindow->priv->notesview), ev_dscwindow->priv->model);
	gtk_widget_show_all (h);
	gtk_container_add (GTK_CONTAINER (ev_dscwindow), h);

/* fallback if we have >2 monitors (see window placement) */
/*+	gtk_window_set_default_size (GTK_WINDOW (self), 800, 600);
+
+
+	/* This would just open new windows. */
/*+	gtk_drag_dest_unset (GTK_WIDGET (priv->notesview));
+	gtk_drag_dest_unset (GTK_WIDGET (priv->overview));
+
+	gint click = GDK_BUTTON1_MOTION_MASK | GDK_KEY_PRESS_MASK;
+	gtk_widget_add_events (GTK_WIDGET (priv->overview), click);
+	g_signal_connect (priv->notesview, "button-press-event",
+			  G_CALLBACK (ev_dscwindow_notes_clicked), self);
*/
}


static void
ev_dscwindow_dispose (GObject *obj)
{
	EvDSCWindow * ev_dscwindow = EV_DSCWINDOW (obj);
	EvDSCWindowPrivate *priv = ev_dscwindow->priv;

//	if (EV_IS_VIEW (priv->overview) {
//		ev_document_model_set_document (priv->model, NULL);

//		ev_view_set_document (EV_VIEW (priv->overview),  NULL);
//		g_object_unref (priv->overview);
//	}
//	if (EV_IS_VIEW (priv->notesview)) {
//		ev_view_set_document (EV_VIEW (priv->notesview), NULL);
//		g_object_unref (priv->notesview);
//	}
/*TODO: save fulscreen state*/
	ev_window_stop_presentation (EV_WINDOW(priv->presentation_window), 0);

	if (priv->moveback_monitor >= 0) {
		GtkWindow * presentation_window = GTK_WINDOW (priv->presentation_window);
		GdkRectangle coords;

		gdk_screen_get_monitor_geometry (
			gtk_window_get_screen (presentation_window),
			priv->moveback_monitor, &coords);

		gtk_window_move (presentation_window, coords.x, coords.y);
	}

	G_OBJECT_CLASS (ev_dscwindow_parent_class)->dispose (obj);
}

static void
ev_dscwindow_class_init (EvDSCWindowClass *ev_dscwindow_class)
{
	GObjectClass *g_object_class = G_OBJECT_CLASS (ev_dscwindow_class);
	/*parent_class = g_type_class_peek_parent (ev_dscwindow_class);*/
	g_type_class_add_private (g_object_class, sizeof (EvDSCWindowPrivate));
	g_object_class->dispose  = ev_dscwindow_dispose;
}

GtkWidget *
ev_dscwindow_new (void)
{
	EvDSCWindow *ev_dscwindow;

	ev_dscwindow = g_object_new (EV_TYPE_DSCWINDOW, "type", GTK_WINDOW_TOPLEVEL, NULL);
	return GTK_WIDGET (ev_dscwindow);
}