/*
 * 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/>
 *
 *
 * Authors:
 *		Chris Toshok <toshok@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

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

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

#include "eab-editor.h"
#include "e-util/e-util.h"
#include "addressbook/gui/widgets/eab-gui-util.h"

struct _EABEditorPrivate {
	EShell *shell;
};

enum {
	PROP_0,
	PROP_SHELL
};

enum {
	CONTACT_ADDED,
	CONTACT_MODIFIED,
	CONTACT_DELETED,
	EDITOR_CLOSED,
	LAST_SIGNAL
};

static GSList *all_editors;
static gpointer parent_class;
static guint signals[LAST_SIGNAL];

static void
eab_editor_quit_requested_cb (EShell *shell,
                              EShellQuitReason reason,
                              EABEditor *editor)
{
	GtkWindow *window;

	/* Quit immediately if another Evolution process asked us to. */
	if (reason == E_SHELL_QUIT_REMOTE_REQUEST)
		return;

	window = eab_editor_get_window (editor);

	eab_editor_raise (editor);
	if (!eab_editor_prompt_to_save_changes (editor, window))
		e_shell_cancel_quit (shell);
}

static void
eab_editor_set_shell (EABEditor *editor,
                      EShell *shell)
{
	g_return_if_fail (editor->priv->shell == NULL);
	g_return_if_fail (E_IS_SHELL (shell));

	editor->priv->shell = g_object_ref (shell);

	g_signal_connect (
		shell, "quit-requested",
		G_CALLBACK (eab_editor_quit_requested_cb), editor);
}

static void
eab_editor_set_property (GObject *object,
                         guint property_id,
                         const GValue *value,
                         GParamSpec *pspec)
{
	switch (property_id) {
		case PROP_SHELL:
			eab_editor_set_shell (
				EAB_EDITOR (object),
				g_value_get_object (value));
			return;
	}

	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
eab_editor_get_property (GObject *object,
                         guint property_id,
                         GValue *value,
                         GParamSpec *pspec)
{
	switch (property_id) {
		case PROP_SHELL:
			g_value_set_object (
				value, eab_editor_get_shell (
				EAB_EDITOR (object)));
			return;
	}

	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
eab_editor_dispose (GObject *object)
{
	EABEditorPrivate *priv;

	priv = EAB_EDITOR (object)->priv;

	if (priv->shell != NULL) {
		g_signal_handlers_disconnect_matched (
			priv->shell, G_SIGNAL_MATCH_DATA,
			0, 0, NULL, NULL, object);
		g_object_unref (priv->shell);
		priv->shell = NULL;
	}

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

static void
eab_editor_finalize (GObject *object)
{
	all_editors = g_slist_remove (all_editors, object);

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

static void
eab_editor_class_init (EABEditorClass *class)
{
	GObjectClass *object_class;

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

	object_class = G_OBJECT_CLASS (class);
	object_class->set_property = eab_editor_set_property;
	object_class->get_property = eab_editor_get_property;
	object_class->dispose = eab_editor_dispose;
	object_class->finalize = eab_editor_finalize;

	g_object_class_install_property (
		object_class,
		PROP_SHELL,
		g_param_spec_object (
			"shell",
			"Shell",
			"The EShell singleton",
			E_TYPE_SHELL,
			G_PARAM_READWRITE |
			G_PARAM_CONSTRUCT_ONLY));

	signals[CONTACT_ADDED] =
		g_signal_new ("contact_added",
			      G_OBJECT_CLASS_TYPE (object_class),
			      G_SIGNAL_RUN_FIRST,
			      G_STRUCT_OFFSET (EABEditorClass, contact_added),
			      NULL, NULL,
			      e_marshal_NONE__POINTER_OBJECT,
			      G_TYPE_NONE, 2,
			      G_TYPE_POINTER, G_TYPE_OBJECT);

	signals[CONTACT_MODIFIED] =
		g_signal_new ("contact_modified",
			      G_OBJECT_CLASS_TYPE (object_class),
			      G_SIGNAL_RUN_FIRST,
			      G_STRUCT_OFFSET (EABEditorClass, contact_modified),
			      NULL, NULL,
			      e_marshal_NONE__POINTER_OBJECT,
			      G_TYPE_NONE, 2,
			      G_TYPE_POINTER, G_TYPE_OBJECT);

	signals[CONTACT_DELETED] =
		g_signal_new ("contact_deleted",
			      G_OBJECT_CLASS_TYPE (object_class),
			      G_SIGNAL_RUN_FIRST,
			      G_STRUCT_OFFSET (EABEditorClass, contact_deleted),
			      NULL, NULL,
			      e_marshal_NONE__POINTER_OBJECT,
			      G_TYPE_NONE, 2,
			      G_TYPE_POINTER, G_TYPE_OBJECT);

	signals[EDITOR_CLOSED] =
		g_signal_new ("editor_closed",
			      G_OBJECT_CLASS_TYPE (object_class),
			      G_SIGNAL_RUN_FIRST,
			      G_STRUCT_OFFSET (EABEditorClass, editor_closed),
			      NULL, NULL,
			      g_cclosure_marshal_VOID__VOID,
			      G_TYPE_NONE, 0);
}

static void
eab_editor_init (EABEditor *editor)
{
	editor->priv = G_TYPE_INSTANCE_GET_PRIVATE (
		editor, EAB_TYPE_EDITOR, EABEditorPrivate);

	all_editors = g_slist_prepend (all_editors, editor);
}

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

	if (G_UNLIKELY (type == 0)) {
		static const GTypeInfo type_info =  {
			sizeof (EABEditorClass),
			(GBaseInitFunc) NULL,
			(GBaseFinalizeFunc) NULL,
			(GClassInitFunc) eab_editor_class_init,
			(GClassFinalizeFunc) NULL,
			NULL,  /* class_data */
			sizeof (EABEditor),
			0,     /* n_preallocs */
			(GInstanceInitFunc) eab_editor_init,
			NULL   /* value_table */
		};

		type = g_type_register_static (
			G_TYPE_OBJECT, "EABEditor", &type_info,
			G_TYPE_FLAG_ABSTRACT);
	}

	return type;
}

EShell *
eab_editor_get_shell (EABEditor *editor)
{
	g_return_val_if_fail (EAB_IS_EDITOR (editor), NULL);

	return E_SHELL (editor->priv->shell);
}

GSList *
eab_editor_get_all_editors (void)
{
	return all_editors;
}

void
eab_editor_show (EABEditor *editor)
{
	EABEditorClass *class;

	g_return_if_fail (EAB_IS_EDITOR (editor));

	class = EAB_EDITOR_GET_CLASS (editor);
	g_return_if_fail (class->show != NULL);

	class->show (editor);
}

void
eab_editor_close (EABEditor *editor)
{
	EABEditorClass *class;

	g_return_if_fail (EAB_IS_EDITOR (editor));

	class = EAB_EDITOR_GET_CLASS (editor);
	g_return_if_fail (class->close != NULL);

	class->close (editor);
}

void
eab_editor_raise (EABEditor *editor)
{
	EABEditorClass *class;

	g_return_if_fail (EAB_IS_EDITOR (editor));

	class = EAB_EDITOR_GET_CLASS (editor);
	g_return_if_fail (class->raise != NULL);

	class->raise (editor);
}

void
eab_editor_save_contact (EABEditor *editor, gboolean should_close)
{
	EABEditorClass *class;

	g_return_if_fail (EAB_IS_EDITOR (editor));

	class = EAB_EDITOR_GET_CLASS (editor);
	g_return_if_fail (class->save_contact != NULL);

	class->save_contact (editor, should_close);
}

gboolean
eab_editor_is_changed (EABEditor *editor)
{
	EABEditorClass *class;

	g_return_val_if_fail (EAB_IS_EDITOR (editor), FALSE);

	class = EAB_EDITOR_GET_CLASS (editor);
	g_return_val_if_fail (class->is_changed != NULL, FALSE);

	return class->is_changed (editor);
}

gboolean
eab_editor_is_valid (EABEditor *editor)
{
	EABEditorClass *class;

	g_return_val_if_fail (EAB_IS_EDITOR (editor), FALSE);

	class = EAB_EDITOR_GET_CLASS (editor);
	g_return_val_if_fail (class->is_valid != NULL, FALSE);

	return class->is_valid (editor);
}

GtkWindow*
eab_editor_get_window (EABEditor *editor)
{
	EABEditorClass *class;

	g_return_val_if_fail (EAB_IS_EDITOR (editor), NULL);

	class = EAB_EDITOR_GET_CLASS (editor);
	g_return_val_if_fail (class->get_window != NULL, NULL);

	return class->get_window (editor);
}

/* This function prompts for saving if editor conents are in changed state and
   save or discards or cancels (just returns with out doing anything) according
   to user input.  Editor gets destroyed in case of save and discard case. */

gboolean
eab_editor_prompt_to_save_changes (EABEditor *editor, GtkWindow *window)
{
	if (!eab_editor_is_changed (editor)) {
		eab_editor_close (EAB_EDITOR (editor));
		return TRUE;
	}

	switch (eab_prompt_save_dialog (window)) {
	case GTK_RESPONSE_YES:
		if (!eab_editor_is_valid (editor)) {
			return FALSE;
		}
		eab_editor_save_contact (editor, TRUE);
		return TRUE;
	case GTK_RESPONSE_NO:
		eab_editor_close (EAB_EDITOR (editor));
		return TRUE;
	case GTK_RESPONSE_CANCEL:
	default:
		return FALSE;
	}
}

void
eab_editor_contact_added (EABEditor *editor,
                          const GError *error,
                          EContact *contact)
{
	g_return_if_fail (EAB_IS_EDITOR (editor));
	g_return_if_fail (E_IS_CONTACT (contact));

	g_signal_emit (editor, signals[CONTACT_ADDED], 0, error, contact);
}

void
eab_editor_contact_modified (EABEditor *editor,
                             const GError *error,
                             EContact *contact)
{
	g_return_if_fail (EAB_IS_EDITOR (editor));
	g_return_if_fail (E_IS_CONTACT (contact));

	g_signal_emit (editor, signals[CONTACT_MODIFIED], 0, error, contact);
}

void
eab_editor_contact_deleted (EABEditor *editor,
                            const GError *error,
                            EContact *contact)
{
	g_return_if_fail (EAB_IS_EDITOR (editor));
	g_return_if_fail (E_IS_CONTACT (contact));

	g_signal_emit (editor, signals[CONTACT_DELETED], 0, error, contact);
}

void
eab_editor_closed (EABEditor *editor)
{
	g_return_if_fail (EAB_IS_EDITOR (editor));

	g_signal_emit (editor, signals[EDITOR_CLOSED], 0);
}