/*
 * Copyright (C) 2009-2012 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2009-2012 David Robillard <d@drobilla.net>
 * Copyright (C) 2009-2016 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2014-2019 Robin Gareus <robin@gareus.org>
 * Copyright (C) 2018 Ben Loftis <ben@harrisonconsoles.com>
 *
 * 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 <glib.h>
#include "pbd/gstdio_compat.h"

#include <glibmm.h>

#include <gtkmm/liststore.h>

#include "ardour/filename_extensions.h"
#include "ardour/session.h"
#include "ardour/session_state_utils.h"
#include "ardour/session_directory.h"

#include "widgets/choice.h"
#include "widgets/prompter.h"

#include "editor_snapshots.h"
#include "ardour_ui.h"
#include "utils.h"

#include "pbd/i18n.h"

using namespace std;
using namespace PBD;
using namespace Gtk;
using namespace ARDOUR;
using namespace ARDOUR_UI_UTILS;

EditorSnapshots::EditorSnapshots ()
{
	_snapshot_model = ListStore::create (_columns);
	_snapshot_display.set_model (_snapshot_model);
	_snapshot_display.append_column ("", _columns.current_active);
	_snapshot_display.append_column (_("Snapshot (dbl-click to load)"), _columns.visible_name);
	_snapshot_display.append_column (_("Modified Date"), _columns.time_formatted);
	_snapshot_display.set_size_request (75, -1);
	_snapshot_display.set_headers_visible (true);
	_snapshot_display.set_reorderable (false);
	_scroller.add (_snapshot_display);
	_scroller.set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);

	_snapshot_display.signal_button_press_event().connect (sigc::mem_fun (*this, &EditorSnapshots::button_press), false);
}

void
EditorSnapshots::set_session (Session* s)
{
	SessionHandlePtr::set_session (s);

	redisplay ();
}

bool
EditorSnapshots::button_press (GdkEventButton* ev)
{
	if (ev->button == 3) {
		/* Right-click on the snapshot list.
		 * Work out which snapshot it was over.
		 */
		Gtk::TreeModel::Path path;
		Gtk::TreeViewColumn* col;
		int cx;
		int cy;
		_snapshot_display.get_path_at_pos ((int) ev->x, (int) ev->y, path, col, cx, cy);
		if (!path) {
			return false;
		}
		_snapshot_display.get_selection()->select (path);
		Gtk::TreeModel::iterator iter = _snapshot_model->get_iter (path);
		if (iter) {
			Gtk::TreeModel::Row row = *iter;
			popup_context_menu (ev->button, ev->time, row[_columns.real_name]);
		}
		return true;
	} else if (ev->type == GDK_2BUTTON_PRESS) {
		Gtk::TreeModel::Path path;
		Gtk::TreeViewColumn* col;
		int cx;
		int cy;
		string snap_name;
		_snapshot_display.get_path_at_pos ((int) ev->x, (int) ev->y, path, col, cx, cy);
		if (!path) {
			return false;
		}
		Gtk::TreeModel::iterator iter = _snapshot_model->get_iter (path);
		if (iter) {
			Gtk::TreeModel::Row row = *iter;
			snap_name = row[_columns.real_name];
		}

		if (snap_name.length() == 0) {
			return false;
		}

		if (_session->snap_name() == snap_name) {
			return false;
		}

		ArdourDialog confirm (_("Load Snapshot?"), true);
		Gtk::Label* m = Gtk::manage (new Gtk::Label (string_compose ("%1\n%2", _("Do you want to load this snapshot?"), snap_name)));
		confirm.get_vbox()->pack_start (*m, true, true);
		confirm.add_button (Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
		confirm.add_button (_("Yes, Load It"), Gtk::RESPONSE_ACCEPT);
		confirm.show_all ();
		switch (confirm.run()) {
			case RESPONSE_ACCEPT:
				break;
			default:
				return false;
		}

		_snapshot_display.set_sensitive (false);
		ARDOUR_UI::instance()->load_session (_session->path(), string (snap_name));
		_snapshot_display.set_sensitive (true);
		return true;
	}
	return false;
}


/** Pop up the snapshot display context menu.
 * @param button Button used to open the menu.
 * @param time Menu open time.
 * @param snapshot_name Name of the snapshot that the menu click was over.
 */
void
EditorSnapshots::popup_context_menu (int button, int32_t time, std::string snapshot_name)
{
	using namespace Menu_Helpers;

	MenuList& items (_menu.items());
	items.clear ();

	const bool modification_allowed = (_session->snap_name() != snapshot_name && _session->name() != snapshot_name && _snapshot_model->children().size () > 1);

	add_item_with_sensitivity (items, MenuElem (_("Remove"), sigc::bind (sigc::mem_fun (*this, &EditorSnapshots::remove), snapshot_name)), modification_allowed);
	add_item_with_sensitivity (items, MenuElem (_("Rename..."), sigc::bind (sigc::mem_fun (*this, &EditorSnapshots::rename), snapshot_name)), modification_allowed);

	_menu.popup (button, time);
}

void
EditorSnapshots::rename (std::string old_name)
{
	ArdourWidgets::Prompter prompter(true);

	string new_name;

	prompter.set_name ("Prompter");
	prompter.set_title (_("Rename Snapshot"));
	prompter.add_button (Gtk::Stock::SAVE, Gtk::RESPONSE_ACCEPT);
	prompter.set_prompt (_("New name of snapshot"));
	prompter.set_initial_text (old_name);

	if (prompter.run() == RESPONSE_ACCEPT) {
		prompter.get_result (new_name);
		if (new_name.length()) {
			_session->rename_state (old_name, new_name);
			redisplay ();
		}
	}
}


void
EditorSnapshots::remove (std::string name)
{
	vector<string> choices;

	std::string prompt = string_compose (_("Do you really want to remove snapshot \"%1\" ?\n(which cannot be undone)"), name);

	choices.push_back (_("No, do nothing."));
	choices.push_back (_("Yes, remove it."));

	ArdourWidgets::Choice prompter (_("Remove snapshot"), prompt, choices);

	if (prompter.run () == 1) {
		_session->remove_state (name);
		redisplay ();
	}
}

void
EditorSnapshots::redisplay ()
{
	if (_session == 0) {
		return;
	}

	vector<string> state_file_names = _session->possible_states ();

	if (state_file_names.empty()) {
		return;
	}

	_snapshot_model->clear ();

	for (vector<string>::iterator i = state_file_names.begin(); i != state_file_names.end(); ++i)
	{
		string statename = (*i);
		TreeModel::Row row = *(_snapshot_model->append());

		/* this lingers on in case we ever want to change the visible
		   name of the snapshot.
		*/

		string display_name;
		display_name = statename;

		if (statename == _session->snap_name()) {
			_snapshot_display.get_selection()->select(row);
		}

		std::string s = Glib::build_filename (_session->path(), statename + ARDOUR::statefile_suffix);

		GStatBuf gsb;
		g_stat (s.c_str(), &gsb);
		Glib::DateTime gdt(Glib::DateTime::create_now_local (gsb.st_mtime));

		if (_session->snap_name() == display_name) {
			row[_columns.current_active] = u8"\u25B6"; // BLACK RIGHT-POINTING TRIANGLE
		} else {
			row[_columns.current_active] = "";
		}
		row[_columns.visible_name] = display_name;
		row[_columns.real_name] = statename;
		row[_columns.time_formatted] = gdt.format ("%F %H:%M");
	}
}