/*
 * Copyright (C) 2008-2011 Sakari Bergen <sakari.bergen@beatwaves.net>
 * Copyright (C) 2009 David Robillard <d@drobilla.net>
 * Copyright (C) 2010-2016 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2014-2017 Robin Gareus <robin@gareus.org>
 *
 * This program 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.
 *
 * 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 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.
 */

#include <gtkmm/messagedialog.h>
#include <gtkmm/stock.h>

#include "ardour/export_preset.h"

#include "export_preset_selector.h"

#include "pbd/i18n.h"

ExportPresetSelector::ExportPresetSelector (bool readonly)
	: label (_("Preset"), Gtk::ALIGN_START)
	, combo (!readonly)
	, save_button (Gtk::Stock::SAVE)
	, remove_button (Gtk::Stock::REMOVE)
	, new_button (Gtk::Stock::NEW)
{
	list = Gtk::ListStore::create (cols);
	list->set_sort_column (cols.label, Gtk::SORT_ASCENDING);
	combo.set_model (list);

	if (readonly) {
		combo.pack_start (cols.label);
		pack_start (label, false, false, 0);
		pack_start (combo, true, true, 6);
		select_connection = combo.signal_changed ().connect (sigc::mem_fun (*this, &ExportPresetSelector::selection_changed));
	} else {
		combo.set_entry_text_column (cols.label);

		pack_start (label, false, false, 0);
		pack_start (combo, true, true, 6);
		pack_start (save_button, false, false, 0);
		pack_start (remove_button, false, false, 6);
		pack_start (new_button, false, false, 0);

		save_button.set_sensitive (false);
		remove_button.set_sensitive (false);
		new_button.set_sensitive (false);

		select_connection = combo.signal_changed ().connect (sigc::mem_fun (*this, &ExportPresetSelector::update_selection));
		save_button.signal_clicked ().connect (sigc::mem_fun (*this, &ExportPresetSelector::save_current));
		new_button.signal_clicked ().connect (sigc::mem_fun (*this, &ExportPresetSelector::create_new));
		remove_button.signal_clicked ().connect (sigc::mem_fun (*this, &ExportPresetSelector::remove_current));
	}

	show_all_children ();
}

void
ExportPresetSelector::set_manager (boost::shared_ptr<ARDOUR::ExportProfileManager> manager)
{
	profile_manager = manager;
	current = profile_manager->preset ();
	sync_with_manager ();
}

void
ExportPresetSelector::sync_with_manager ()
{
	list->clear ();

	PresetList const&        presets = profile_manager->get_presets ();
	Gtk::ListStore::iterator tree_it;

	for (PresetList::const_iterator it = presets.begin (); it != presets.end (); ++it) {
		tree_it = list->append ();
		tree_it->set_value (cols.preset, *it);
		tree_it->set_value (cols.label, std::string ((*it)->name ()));

		if (*it == current) {
			select_connection.block (true);
			combo.set_active (tree_it);
			select_connection.block (false);
		}
	}
}

void
ExportPresetSelector::selection_changed ()
{
	Gtk::ListStore::iterator it = combo.get_active ();
	if (!it) {
		return;
	}

	assert (list->iter_is_valid (it));
	current = it->get_value (cols.preset);
	if (!profile_manager->load_preset (current)) {
		Gtk::MessageDialog dialog (_("The selected preset did not load successfully!\nPerhaps it references a format that has been removed?"),
		                           false, Gtk::MESSAGE_WARNING);
		dialog.run ();
	}

	sync_with_manager ();
	CriticalSelectionChanged ();
}

void
ExportPresetSelector::update_selection ()
{
	Gtk::ListStore::iterator it                 = combo.get_active ();
	std::string              text               = combo.get_entry ()->get_text ();
	bool                     preset_name_exists = false;

	for (PresetList::const_iterator it = profile_manager->get_presets ().begin (); it != profile_manager->get_presets ().end (); ++it) {
		if (!(*it)->name ().compare (text)) {
			preset_name_exists = true;
		}
	}

	if (list->iter_is_valid (it)) {
		previous = current = it->get_value (cols.preset);
		if (!profile_manager->load_preset (current)) {
			Gtk::MessageDialog dialog (_("The selected preset did not load successfully!\nPerhaps it references a format that has been removed?"),
			                           false, Gtk::MESSAGE_WARNING);
			dialog.run ();
		}
		sync_with_manager ();
		CriticalSelectionChanged ();

		/* Make an edit, so that signal changed will be emitted on re-selection */

		select_connection.block (true);
		combo.get_entry ()->set_text ("");
		combo.get_entry ()->set_text (text);
		select_connection.block (false);

	} else { // Text has been edited, this should not make any changes in the profile manager
		if (previous && !text.compare (previous->name ())) {
			current = previous;
		} else {
			current.reset ();
		}
	}

	save_button.set_sensitive (current != 0);
	remove_button.set_sensitive (current != 0);
	new_button.set_sensitive (!current && !text.empty () && !preset_name_exists);
}

void
ExportPresetSelector::create_new ()
{
	if (!profile_manager) {
		return;
	}

	previous = current = profile_manager->new_preset (combo.get_entry ()->get_text ());
	sync_with_manager ();
	update_selection (); // Update preset widget states
}

void
ExportPresetSelector::save_current ()
{
	if (!profile_manager) {
		return;
	}

	previous = current = profile_manager->save_preset (combo.get_entry ()->get_text ());
	sync_with_manager ();
	update_selection (); // Update preset widget states
}

void
ExportPresetSelector::remove_current ()
{
	if (!profile_manager) {
		return;
	}

	Gtk::MessageDialog dialog (_("Do you really want to remove this preset?"),
	                           false,
	                           Gtk::MESSAGE_QUESTION,
	                           Gtk::BUTTONS_YES_NO);

	if (Gtk::RESPONSE_YES != dialog.run ()) {
		/* User has selected "no" or closed the dialog, better
		 * abort
		 */
		return;
	}

	profile_manager->remove_preset ();
	combo.get_entry ()->set_text ("");
	sync_with_manager ();
}
