/*
 * e-mail-label-manager.c
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "e-mail-label-manager.h"

#include <glib/gi18n.h>
#include "e-mail-label-dialog.h"
#include "e-mail-label-tree-view.h"

struct _EMailLabelManagerPrivate {
	GtkWidget *tree_view;
	GtkWidget *add_button;
	GtkWidget *edit_button;
	GtkWidget *remove_button;
};

enum {
	PROP_0,
	PROP_LIST_STORE
};

enum {
	ADD_LABEL,
	EDIT_LABEL,
	REMOVE_LABEL,
	LAST_SIGNAL
};

static gpointer parent_class;
static guint signals[LAST_SIGNAL];

static void
mail_label_manager_selection_changed_cb (EMailLabelManager *manager,
                                         GtkTreeSelection *selection)
{
	GtkWidget *edit_button;
	GtkWidget *remove_button;
	GtkTreeModel *model;
	GtkTreeIter iter;

	edit_button = manager->priv->edit_button;
	remove_button = manager->priv->remove_button;

	if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
		EMailLabelListStore *store;
		gboolean sensitive;
		gchar *label_tag;

		store = E_MAIL_LABEL_LIST_STORE (model);
		label_tag = e_mail_label_list_store_get_tag (store, &iter);
		sensitive = !e_mail_label_tag_is_default (label_tag);
		g_free (label_tag);

		/* Disallow removing default labels. */
		gtk_widget_set_sensitive (edit_button, TRUE);
		gtk_widget_set_sensitive (remove_button, sensitive);
	} else {
		gtk_widget_set_sensitive (edit_button, FALSE);
		gtk_widget_set_sensitive (remove_button, FALSE);
	}
}

static void
mail_label_manager_set_property (GObject *object,
                                 guint property_id,
                                 const GValue *value,
                                 GParamSpec *pspec)
{
	switch (property_id) {
		case PROP_LIST_STORE:
			e_mail_label_manager_set_list_store (
				E_MAIL_LABEL_MANAGER (object),
				g_value_get_object (value));
			return;
	}

	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
mail_label_manager_get_property (GObject *object,
                                 guint property_id,
                                 GValue *value,
                                 GParamSpec *pspec)
{
	switch (property_id) {
		case PROP_LIST_STORE:
			g_value_set_object (
				value, e_mail_label_manager_get_list_store (
				E_MAIL_LABEL_MANAGER (object)));
			return;
	}

	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
mail_label_manager_dispose (GObject *object)
{
	EMailLabelManagerPrivate *priv;

	priv = E_MAIL_LABEL_MANAGER (object)->priv;

	if (priv->tree_view != NULL) {
		g_object_unref (priv->tree_view);
		priv->tree_view = NULL;
	}

	if (priv->add_button != NULL) {
		g_object_unref (priv->add_button);
		priv->add_button = NULL;
	}

	if (priv->edit_button != NULL) {
		g_object_unref (priv->edit_button);
		priv->edit_button = NULL;
	}

	if (priv->remove_button != NULL) {
		g_object_unref (priv->remove_button);
		priv->remove_button = NULL;
	}

	/* Chain up to parent's dispose() method. */
	G_OBJECT_CLASS (parent_class)->dispose (object);
}

static void
mail_label_manager_add_label (EMailLabelManager *manager)
{
	EMailLabelDialog *label_dialog;
	GtkTreeView *tree_view;
	GtkTreeModel *model;
	GtkWidget *dialog;
	gpointer parent;
	GdkColor label_color;
	const gchar *label_name;

	parent = gtk_widget_get_toplevel (GTK_WIDGET (manager));
	parent = gtk_widget_is_toplevel (parent) ? parent : NULL;
	dialog = e_mail_label_dialog_new (parent);

	gtk_window_set_title (GTK_WINDOW (dialog), _("Add Label"));

	if (gtk_dialog_run (GTK_DIALOG (dialog)) != GTK_RESPONSE_OK)
		goto exit;

	label_dialog = E_MAIL_LABEL_DIALOG (dialog);
	label_name = e_mail_label_dialog_get_label_name (label_dialog);
	e_mail_label_dialog_get_label_color (label_dialog, &label_color);

	tree_view = GTK_TREE_VIEW (manager->priv->tree_view);
	model = gtk_tree_view_get_model (tree_view);

	e_mail_label_list_store_set (
		E_MAIL_LABEL_LIST_STORE (model),
		NULL, label_name, &label_color);

exit:
	gtk_widget_destroy (dialog);
}

static void
mail_label_manager_edit_label (EMailLabelManager *manager)
{
	EMailLabelDialog *label_dialog;
	EMailLabelListStore *label_store;
	GtkTreeSelection *selection;
	GtkTreeView *tree_view;
	GtkTreeModel *model;
	GtkTreeIter iter;
	GtkWidget *dialog;
	GtkWidget *parent;
	GdkColor label_color;
	const gchar *new_name;
	gchar *label_name;

	tree_view = GTK_TREE_VIEW (manager->priv->tree_view);
	selection = gtk_tree_view_get_selection (tree_view);

	if (!gtk_tree_selection_get_selected (selection, &model, &iter))
		return;

	label_store = E_MAIL_LABEL_LIST_STORE (model);
	label_name = e_mail_label_list_store_get_name (label_store, &iter);
	e_mail_label_list_store_get_color (label_store, &iter, &label_color);

	parent = gtk_widget_get_toplevel (GTK_WIDGET (manager));
	dialog = e_mail_label_dialog_new (GTK_WINDOW (parent));
	label_dialog = E_MAIL_LABEL_DIALOG (dialog);

	e_mail_label_dialog_set_label_name (label_dialog, label_name);
	e_mail_label_dialog_set_label_color (label_dialog, &label_color);
	gtk_window_set_title (GTK_WINDOW (dialog), _("Edit Label"));

	if (gtk_dialog_run (GTK_DIALOG (dialog)) != GTK_RESPONSE_OK)
		goto exit;

	new_name = e_mail_label_dialog_get_label_name (label_dialog);
	e_mail_label_dialog_get_label_color (label_dialog, &label_color);

	e_mail_label_list_store_set (
		label_store, &iter, new_name, &label_color);

exit:
	gtk_widget_destroy (dialog);

	g_free (label_name);
}

static void
mail_label_manager_remove_label (EMailLabelManager *manager)
{
	GtkTreeSelection *selection;
	GtkTreeView *tree_view;
	GtkTreeModel *model;
	GtkTreeIter iter;

	tree_view = GTK_TREE_VIEW (manager->priv->tree_view);
	selection = gtk_tree_view_get_selection (tree_view);

	if (!gtk_tree_selection_get_selected (selection, &model, &iter))
		return;

	gtk_list_store_remove (GTK_LIST_STORE (model), &iter);
}

static void
mail_label_manager_class_init (EMailLabelManagerClass *class)
{
	GObjectClass *object_class;

	parent_class = g_type_class_peek_parent (class);
	g_type_class_add_private (class, sizeof (EMailLabelManagerPrivate));

	object_class = G_OBJECT_CLASS (class);
	object_class->set_property = mail_label_manager_set_property;
	object_class->get_property = mail_label_manager_get_property;
	object_class->dispose = mail_label_manager_dispose;

	class->add_label = mail_label_manager_add_label;
	class->edit_label = mail_label_manager_edit_label;
	class->remove_label = mail_label_manager_remove_label;

	g_object_class_install_property (
		object_class,
		PROP_LIST_STORE,
		g_param_spec_object (
			"list-store",
			"List Store",
			NULL,
			E_TYPE_MAIL_LABEL_LIST_STORE,
			G_PARAM_READWRITE));

	signals[ADD_LABEL] = g_signal_new (
		"add-label",
		G_OBJECT_CLASS_TYPE (class),
		G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
		G_STRUCT_OFFSET (EMailLabelManagerClass, add_label),
		NULL, NULL,
		g_cclosure_marshal_VOID__VOID,
		G_TYPE_NONE, 0);

	signals[EDIT_LABEL] = g_signal_new (
		"edit-label",
		G_OBJECT_CLASS_TYPE (class),
		G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
		G_STRUCT_OFFSET (EMailLabelManagerClass, edit_label),
		NULL, NULL,
		g_cclosure_marshal_VOID__VOID,
		G_TYPE_NONE, 0);

	signals[REMOVE_LABEL] = g_signal_new (
		"remove-label",
		G_OBJECT_CLASS_TYPE (class),
		G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
		G_STRUCT_OFFSET (EMailLabelManagerClass, remove_label),
		NULL, NULL,
		g_cclosure_marshal_VOID__VOID,
		G_TYPE_NONE, 0);
}

static void
mail_label_manager_init (EMailLabelManager *manager)
{
	GtkTreeSelection *selection;
	GtkWidget *container;
	GtkWidget *widget;

	manager->priv = G_TYPE_INSTANCE_GET_PRIVATE (
		manager, E_TYPE_MAIL_LABEL_MANAGER, EMailLabelManagerPrivate);

	gtk_table_resize (GTK_TABLE (manager), 2, 2);
	gtk_table_set_col_spacings (GTK_TABLE (manager), 6);
	gtk_table_set_row_spacings (GTK_TABLE (manager), 12);

	container = GTK_WIDGET (manager);

	widget = gtk_scrolled_window_new (NULL, NULL);
	gtk_scrolled_window_set_policy (
		GTK_SCROLLED_WINDOW (widget),
		GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
	gtk_scrolled_window_set_shadow_type (
		GTK_SCROLLED_WINDOW (widget), GTK_SHADOW_IN);
	gtk_table_attach (
		GTK_TABLE (container), widget, 0, 1, 0, 1,
		GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
	gtk_widget_show (widget);

	container = widget;

	widget = e_mail_label_tree_view_new ();
	gtk_container_add (GTK_CONTAINER (container), widget);
	manager->priv->tree_view = g_object_ref (widget);
	gtk_widget_show (widget);

	selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (widget));

	g_signal_connect_swapped (
		selection, "changed",
		G_CALLBACK (mail_label_manager_selection_changed_cb),
		manager);

	container = GTK_WIDGET (manager);

	/* FIXME Clarify this.  What menu? */
	widget = gtk_label_new (
		_("Note: Underscore in the label name is used\n"
		  "as mnemonic identifier in menu."));
	gtk_label_set_justify (GTK_LABEL (widget), GTK_JUSTIFY_CENTER);
	gtk_table_attach (
		GTK_TABLE (container), widget,
		0, 1, 1, 2, 0, 0, 0, 0);
	gtk_widget_show (widget);

	widget = gtk_vbutton_box_new ();
	gtk_button_box_set_layout (
		GTK_BUTTON_BOX (widget), GTK_BUTTONBOX_START);
	gtk_box_set_spacing (GTK_BOX (widget), 6);
	gtk_table_attach (
		GTK_TABLE (container), widget,
		1, 2, 0, 2, 0, GTK_FILL, 0, 0);
	gtk_widget_show (widget);

	container = widget;

	widget = gtk_button_new_from_stock (GTK_STOCK_ADD);
	gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);
	manager->priv->add_button = g_object_ref (widget);
	gtk_widget_show (widget);

	g_signal_connect_swapped (
		widget, "clicked",
		G_CALLBACK (e_mail_label_manager_add_label), manager);

	widget = gtk_button_new_from_stock (GTK_STOCK_EDIT);
	gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);
	manager->priv->edit_button = g_object_ref (widget);
	gtk_widget_show (widget);

	g_signal_connect_swapped (
		widget, "clicked",
		G_CALLBACK (e_mail_label_manager_edit_label), manager);

	widget = gtk_button_new_from_stock (GTK_STOCK_REMOVE);
	gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);
	manager->priv->remove_button = g_object_ref (widget);
	gtk_widget_show (widget);

	g_signal_connect_swapped (
		widget, "clicked",
		G_CALLBACK (e_mail_label_manager_remove_label), manager);
}

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

	if (G_UNLIKELY (type == 0)) {
		static const GTypeInfo type_info = {
			sizeof (EMailLabelManagerClass),
			(GBaseInitFunc) NULL,
			(GBaseFinalizeFunc) NULL,
			(GClassInitFunc) mail_label_manager_class_init,
			(GClassFinalizeFunc) NULL,
			NULL,  /* class_data */
			sizeof (EMailLabelManager),
			0,     /* n_preallocs */
			(GInstanceInitFunc) mail_label_manager_init,
			NULL   /* value_table */
		};

		type = g_type_register_static (
			GTK_TYPE_TABLE, "EMailLabelManager", &type_info, 0);
	}

	return type;
}

GtkWidget *
e_mail_label_manager_new (void)
{
	return g_object_new (E_TYPE_MAIL_LABEL_MANAGER, NULL);
}

void
e_mail_label_manager_add_label (EMailLabelManager *manager)
{
	g_return_if_fail (E_IS_MAIL_LABEL_MANAGER (manager));

	g_signal_emit (manager, signals[ADD_LABEL], 0);
}

void
e_mail_label_manager_edit_label (EMailLabelManager *manager)
{
	g_return_if_fail (E_IS_MAIL_LABEL_MANAGER (manager));

	g_signal_emit (manager, signals[EDIT_LABEL], 0);
}

void
e_mail_label_manager_remove_label (EMailLabelManager *manager)
{
	g_return_if_fail (E_IS_MAIL_LABEL_MANAGER (manager));

	g_signal_emit (manager, signals[REMOVE_LABEL], 0);
}

EMailLabelListStore *
e_mail_label_manager_get_list_store (EMailLabelManager *manager)
{
	GtkTreeView *tree_view;
	GtkTreeModel *model;

	g_return_val_if_fail (E_IS_MAIL_LABEL_MANAGER (manager), NULL);

	tree_view = GTK_TREE_VIEW (manager->priv->tree_view);
	model = gtk_tree_view_get_model (tree_view);

	return E_MAIL_LABEL_LIST_STORE (model);
}

void
e_mail_label_manager_set_list_store (EMailLabelManager *manager,
                                     EMailLabelListStore *list_store)
{
	GtkTreeView *tree_view;

	g_return_if_fail (E_IS_MAIL_LABEL_MANAGER (manager));
	g_return_if_fail (E_IS_MAIL_LABEL_LIST_STORE (list_store));

	tree_view = GTK_TREE_VIEW (manager->priv->tree_view);
	gtk_tree_view_set_model (tree_view, GTK_TREE_MODEL (list_store));

	g_object_notify (G_OBJECT (manager), "list-store");
}
