/*
 * "Software pw3270, desenvolvido com base nos códigos fontes do WC3270  e X3270
 * (Paul Mattes Paul.Mattes@usa.net), de emulação de terminal 3270 para acesso a
 * aplicativos mainframe. Registro no INPI sob o nome G3270.
 *
 * Copyright (C) <2008> <Banco do Brasil S.A.>
 *
 * Este programa é software livre. Você pode redistribuí-lo e/ou modificá-lo sob
 * os termos da GPL v.2 - Licença Pública Geral  GNU,  conforme  publicado  pela
 * Free Software Foundation.
 *
 * Este programa é distribuído na expectativa de  ser  útil,  mas  SEM  QUALQUER
 * GARANTIA; sem mesmo a garantia implícita de COMERCIALIZAÇÃO ou  de  ADEQUAÇÃO
 * A QUALQUER PROPÓSITO EM PARTICULAR. Consulte a Licença Pública Geral GNU para
 * obter mais detalhes.
 *
 * Você deve ter recebido uma cópia da Licença Pública Geral GNU junto com este
 * programa; se não, escreva para a Free Software Foundation, Inc., 51 Franklin
 * St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Este programa está nomeado como - e possui - linhas de código.
 *
 * Contatos:
 *
 * perry.werneck@gmail.com	(Alexandre Perry de Souza Werneck)
 * erico.mendonca@gmail.com	(Erico Mascarenhas Mendonça)
 *
 */

 #include "../private.h"
 #include <internals.h>
 #include <v3270/settings.h>
 #include <terminal.h>
 #include <lib3270/log.h>

 G_DEFINE_TYPE(V3270SettingsDialog, V3270SettingsDialog, GTK_TYPE_DIALOG);

/*--[ Implement ]------------------------------------------------------------------------------------*/

static gboolean on_tab_focus(V3270Settings *settings, GdkEvent G_GNUC_UNUSED(*event), GtkWindow *dialog)
{
	debug("title: %s",settings->title);
	debug("label: %s",settings->label);

	if(settings->title)
		gtk_window_set_title(dialog,settings->title);

 	return FALSE;
}

static void check_valid(GtkWidget *widget, gboolean *valid)
{
	if(*valid && GTK_IS_V3270_SETTINGS(widget))
	{
		if(!v3270_settings_get_valid(widget))
			*valid = FALSE;
	}

}

static void on_validity(V3270Settings G_GNUC_UNUSED(*settings), gboolean valid, V3270SettingsDialog * dialog)
{
	if(valid)
	{
		// Check validity of all childs.
		gtk_container_foreach(
			GTK_CONTAINER(dialog->tabs),
			(GtkCallback) check_valid,
			&valid
		);

	}

	debug("The current state is %s",valid ? "valid" : "invalid");

	GtkWidget * button = gtk_dialog_get_widget_for_response(GTK_DIALOG(dialog), GTK_RESPONSE_APPLY);

	if(button)
		gtk_widget_set_sensitive(button,valid);


}

static void add(GtkContainer *container, GtkWidget *widget)
{
	g_return_if_fail(GTK_IS_V3270_SETTINGS(widget));

	debug("Added settings dialog %p",widget);

	// https://developer.gnome.org/hig/stable/visual-layout.html.en
	gtk_container_set_border_width(GTK_CONTAINER(widget),18);

	GtkWidget * label = NULL;
	if(GTK_V3270_SETTINGS(widget)->label)
	{
		label = gtk_label_new(GTK_V3270_SETTINGS(widget)->label);

		if(GTK_V3270_SETTINGS(widget)->tooltip)
			gtk_widget_set_tooltip_markup(label,GTK_V3270_SETTINGS(widget)->tooltip);

	}

	gtk_notebook_append_page(
		GTK_V3270_SETTINGS_DIALOG(container)->tabs,
		widget,
		label
	);

	g_signal_connect(G_OBJECT(widget), "focus-in-event", G_CALLBACK(on_tab_focus), container);
	g_signal_connect(G_OBJECT(widget), "validity", G_CALLBACK(on_validity), container);


}

static void apply_settings(GtkWidget *widget, GtkWidget G_GNUC_UNUSED(* terminal))
{
	if(GTK_IS_V3270_SETTINGS(widget))
		v3270_settings_apply(widget);
}

static void revert_settings(GtkWidget *widget, GtkWidget G_GNUC_UNUSED(* terminal))
{
	if(GTK_IS_V3270_SETTINGS(widget))
		v3270_settings_revert(widget);
}

static gboolean bg_emit_save_settings(GObject *widget)
{
	debug("Unfreezing and emitting save settings for terminal %p",widget);
	GTK_V3270(widget)->freeze = 0;
	g_signal_emit(widget,v3270_widget_signal[V3270_SIGNAL_SAVE_SETTINGS], 0, FALSE);
 	return FALSE;
}

void v3270_settings_dialog_apply(GtkWidget *dialog)
{
	debug("%s",__FUNCTION__);

	GtkWidget * terminal = GTK_V3270_SETTINGS_DIALOG(dialog)->terminal;
	if(!terminal)
		return;

	// Freeze to avoid multiple "save settings" signals.
	GTK_V3270(terminal)->freeze = 1;

	gtk_container_foreach(
		GTK_CONTAINER(GTK_V3270_SETTINGS_DIALOG(dialog)->tabs),
		(GtkCallback) apply_settings,
		terminal
	);

	// Delay the "unfreeze" signal.
	g_idle_add((GSourceFunc) bg_emit_save_settings, G_OBJECT(terminal));

}

void v3270_settings_dialog_revert(GtkWidget *dialog)
{
	debug("%s",__FUNCTION__);

	GtkWidget * terminal = GTK_V3270_SETTINGS_DIALOG(dialog)->terminal;
	if(!terminal)
		return;

	gtk_container_foreach(
		GTK_CONTAINER(GTK_V3270_SETTINGS_DIALOG(dialog)->tabs),
		(GtkCallback) revert_settings,
		terminal
	);

}

static void V3270SettingsDialog_class_init(V3270SettingsDialogClass *klass)
{
	GTK_CONTAINER_CLASS(klass)->add = add;
}

static void on_page_changed(GtkNotebook *notebook, GtkWidget G_GNUC_UNUSED(*child), guint G_GNUC_UNUSED(page_num), V3270SettingsDialog G_GNUC_UNUSED(*dialog)) {
 	gtk_notebook_set_show_tabs(notebook,gtk_notebook_get_n_pages(notebook) > 1);
}

static void V3270SettingsDialog_init(V3270SettingsDialog *dialog)
{
	GtkWidget * content_area = gtk_dialog_get_content_area(GTK_DIALOG(dialog));

	// https://developer.gnome.org/hig/stable/visual-layout.html.en
	//gtk_box_set_spacing(GTK_BOX(content_area),18);
	//gtk_container_set_border_width(GTK_CONTAINER(content_area),18);

	gtk_window_set_deletable(GTK_WINDOW(dialog),FALSE);
    gtk_window_set_destroy_with_parent(GTK_WINDOW(dialog), TRUE);

	gtk_dialog_add_buttons(
		GTK_DIALOG(dialog),
		_("_Cancel"), GTK_RESPONSE_CANCEL,
		_("_Apply"), GTK_RESPONSE_APPLY,
		NULL
	);

	// Create notebook for settings widgets
	dialog->tabs = GTK_NOTEBOOK(gtk_notebook_new());

	gtk_notebook_set_scrollable(dialog->tabs,TRUE);
	gtk_notebook_set_show_tabs(dialog->tabs,FALSE);
	gtk_notebook_set_show_border(dialog->tabs, FALSE);
	g_signal_connect(G_OBJECT(dialog->tabs), "page-added", G_CALLBACK(on_page_changed), dialog);
	g_signal_connect(G_OBJECT(dialog->tabs), "page-removed", G_CALLBACK(on_page_changed), dialog);
	gtk_box_pack_start(GTK_BOX(content_area),GTK_WIDGET(dialog->tabs),TRUE,TRUE,0);

}

GtkWidget * v3270_settings_dialog_new()
{
#if GTK_CHECK_VERSION(3,12,0)

	gboolean use_header;
	g_object_get(gtk_settings_get_default(), "gtk-dialogs-use-header", &use_header, NULL);

	GtkWidget * dialog =
		GTK_WIDGET(g_object_new(
			GTK_TYPE_V3270_SETTINGS_DIALOG,
			"use-header-bar", (use_header ? 1 : 0),
			NULL
		));

#else

	GtkWidget * dialog = GTK_WIDGET(g_object_new(GTK_TYPE_V3270_SETTINGS_DIALOG, NULL));

#endif	// GTK 3.12

 	return dialog;

}

static void set_terminal_widget(GtkWidget *settings, GtkWidget *terminal)
{
	if(GTK_IS_V3270_SETTINGS(settings))
		v3270_settings_set_terminal_widget(settings,terminal);
}

void v3270_settings_dialog_set_terminal_widget(GtkWidget *widget, GtkWidget *terminal)
{
	g_return_if_fail(GTK_IS_V3270_SETTINGS_DIALOG(widget));

	debug("%s(%p,%p)",__FUNCTION__,widget,terminal);

	GTK_V3270_SETTINGS_DIALOG(widget)->terminal = terminal;

	gtk_container_foreach(
		GTK_CONTAINER(GTK_V3270_SETTINGS_DIALOG(widget)->tabs),
		(GtkCallback) set_terminal_widget,
		terminal
	);
}

void v3270_setttings_dialog_response(GtkDialog *dialog, gint response_id, GtkWidget G_GNUC_UNUSED(*terminal))
{
    switch(response_id)
    {
    case GTK_RESPONSE_APPLY:
    	debug("%s:apply",__FUNCTION__);
		v3270_settings_dialog_apply(GTK_WIDGET(dialog));
        break;

    case GTK_RESPONSE_CANCEL:
	case GTK_RESPONSE_DELETE_EVENT:
    	debug("%s:cancel",__FUNCTION__);
		v3270_settings_dialog_revert(GTK_WIDGET(dialog));
        break;

	default:
		g_warning("Unexpected settings dialog response \"%d\"",response_id);
    }

    gtk_widget_destroy(GTK_WIDGET(dialog));

}

void v3270_settings_popup_dialog(GtkWidget *widget, GtkWidget *terminal, gboolean modal)
{
	g_return_if_fail(GTK_IS_V3270(terminal) && GTK_IS_V3270_SETTINGS(widget));

	GtkWidget 		* dialog = v3270_settings_dialog_new();
	V3270Settings	* settings = GTK_V3270_SETTINGS(widget);

	if(settings->title)
		gtk_window_set_title(GTK_WINDOW(dialog),settings->title);

	gtk_container_add(GTK_CONTAINER(dialog), widget);
	gtk_window_set_transient_for(GTK_WINDOW(dialog),GTK_WINDOW(gtk_widget_get_toplevel(terminal)));

	gtk_window_set_modal(GTK_WINDOW(dialog),modal);

	v3270_settings_dialog_set_terminal_widget(dialog, terminal);

	g_signal_connect(dialog,"close",G_CALLBACK(gtk_widget_destroy),NULL);
	g_signal_connect(dialog,"response",G_CALLBACK(v3270_setttings_dialog_response),NULL);

	gtk_widget_show_all(dialog);

}

GtkWidget * v3270_settings_get_edit_dialog(GtkWidget *settings, GtkWidget *terminal, gboolean modal) {

 	const gchar * title = GTK_V3270_SETTINGS(settings)->title;

 	GtkWidget * dialog = v3270_settings_dialog_new();

 	if(title)
		gtk_window_set_title(GTK_WINDOW(dialog), title);

	gtk_container_add(GTK_CONTAINER(dialog), settings);

	gtk_window_set_transient_for(GTK_WINDOW(dialog),GTK_WINDOW(gtk_widget_get_toplevel(terminal)));
	gtk_window_set_modal(GTK_WINDOW(dialog),modal);

	v3270_settings_dialog_set_terminal_widget(dialog, terminal);

	g_signal_connect(dialog,"close",G_CALLBACK(gtk_widget_destroy),NULL);
	g_signal_connect(dialog,"response",G_CALLBACK(v3270_setttings_dialog_response),settings);

	return dialog;

 }