/*
 * Copyright (C) 2009-2011 David Robillard <d@drobilla.net>
 * Copyright (C) 2009-2012 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2009-2016 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2012-2015 Tim Mayberry <mojofunk@gmail.com>
 * Copyright (C) 2012-2019 Robin Gareus <robin@gareus.org>
 * Copyright (C) 2013 Colin Fletcher <colin.m.fletcher@googlemail.com>
 * Copyright (C) 2013 Michael R. Fisher <mfisher@bketech.com>
 * Copyright (C) 2015 John Emmas <john@creativepost.co.uk>
 *
 * 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.
 */

#ifdef WAF_BUILD
#include "gtk2ardour-config.h"
#include "gtk2ardour-version.h"
#endif

#include <algorithm>
#include <fcntl.h>

#include "pbd/gstdio_compat.h"

#include <ytkmm/ytkmm.h>

#include "pbd/basename.h"
#include "pbd/failed_constructor.h"
#include "pbd/scoped_file_descriptor.h"
#include "pbd/file_utils.h"
#include "pbd/replace_all.h"
#include "pbd/whitespace.h"
#include "pbd/openuri.h"

#include "ardour/audioengine.h"
#include "ardour/clip_library.h"
#include "ardour/filesystem_paths.h"
#include "ardour/filename_extensions.h"
#include "ardour/plugin_manager.h"
#include "ardour/session.h"
#include "ardour/session_state_utils.h"
#include "ardour/template_utils.h"
#include "ardour/profile.h"

#include "gtkmm2ext/utils.h"

#include "ardour_ui.h"
#include "new_user_wizard.h"
#include "opts.h"
#include "splash.h"
#include "ui_config.h"
#include "pbd/i18n.h"
#include "utils.h"

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

#ifdef __APPLE__
extern void set_default_cocoa_invalidation (); // cocoacarbon.mm
#endif

NewUserWizard::NewUserWizard ()
	: _splash_pushed (false)
	, config_modified (false)
	, default_dir_chooser (0)
{
	set_position (WIN_POS_CENTER);
	set_border_width (12);

	if (! (icon_pixbuf = ::get_icon (PROGRAM_NAME "-icon_48px"))) {
		throw failed_constructor();
	}

	list<Glib::RefPtr<Gdk::Pixbuf> > window_icons;
	Glib::RefPtr<Gdk::Pixbuf> icon;

	if ((icon = ::get_icon (PROGRAM_NAME "-icon_16px"))) {
		window_icons.push_back (icon);
	}
	if ((icon = ::get_icon (PROGRAM_NAME "-icon_22px"))) {
		window_icons.push_back (icon);
	}
	if ((icon = ::get_icon (PROGRAM_NAME "-icon_32px"))) {
		window_icons.push_back (icon);
	}
	if ((icon = ::get_icon (PROGRAM_NAME "-icon_48px"))) {
		window_icons.push_back (icon);
	}
	if (!window_icons.empty ()) {
		set_default_icon_list (window_icons);
	}

	setup_new_user_page ();
	setup_first_time_config_page ();
	setup_clip_lib_page ();
	setup_final_page ();
}

NewUserWizard::~NewUserWizard ()
{
	pop_splash ();
}

bool
NewUserWizard::required ()
{
	if (Glib::file_test (ARDOUR::been_here_before_path (), Glib::FILE_TEST_EXISTS)) {
		return false;
	}
#ifdef __APPLE__
	/* since we cannot use std::optional<bool> as UI_CONFIG_VARIABLE
	 * this is likely the best place for a special case..
	 */
	set_default_cocoa_invalidation ();
#endif

	return true;
}

void
NewUserWizard::setup_new_user_page ()
{
	Label* foomatic = manage (new Label);

	foomatic->set_markup (string_compose (_("\
<span size=\"larger\">%1 is a digital audio workstation. \
\n\n\
You can use %1 to record an orchestra, create with audio/midi loops, edit the perfect vocal take, \
mix a live show with effects, dub a video, and master your tracks for digital distribution. \
\n\n\
There are a few things that need to be configured before you start \
using the program.</span> \
"), PROGRAM_NAME));
	foomatic->set_justify (JUSTIFY_FILL);
	foomatic->set_line_wrap ();

	VBox* vbox = manage (new VBox);
	vbox->set_border_width (24);
	vbox->pack_start (*foomatic, true, true, 12);

#ifndef __APPLE__
	Label* barmatic = manage (new Label);
	barmatic->set_markup (_("<span size=\"larger\">GUI and Font scaling:</span>"));

	Label* bazmatic = manage (new Label);
	bazmatic->set_markup (_("<small><i>This can later be changed in Preferences &gt; Appearance.</i></small>"));

	ui_font_scale.append (_("100%"));
	ui_font_scale.append (_("150%"));
	ui_font_scale.append (_("200%"));
	ui_font_scale.append (_("250%"));
	ui_font_scale.set_active_text (_("100%"));

	HBox* hbox = manage (new HBox);
	HBox* cbox = manage (new HBox);

	hbox->pack_start (*barmatic, false, false);
	hbox->pack_start (ui_font_scale, false, false);
	cbox->pack_start (*hbox, true, false);

	vbox->pack_start (*cbox, false, false, 2);
	vbox->pack_start (*bazmatic, false, false);

	ui_font_scale.show ();
	barmatic->show ();
	bazmatic->show ();
	hbox->show ();
	cbox->show ();

	int ui_scale = guess_default_ui_scale ();
	if (ui_scale <= 100) {
		ui_font_scale.set_active (0); // 100%
	} else if (ui_scale <= 150) {
		ui_font_scale.set_active (1); // 150%
	} else if (ui_scale <= 200) {
		ui_font_scale.set_active (2); // 200%
	} else {
		ui_font_scale.set_active (3); // 250%
	}
	rescale_ui ();

	ui_font_scale.signal_changed ().connect (sigc::mem_fun (*this, &NewUserWizard::rescale_ui));
#endif

	foomatic->show ();
	vbox->show ();

	append_page (*vbox);
	set_page_type (*vbox, ASSISTANT_PAGE_INTRO);
	set_page_title (*vbox, string_compose (_("Welcome to %1"), PROGRAM_NAME));
	set_page_header_image (*vbox, icon_pixbuf);
	set_page_complete (*vbox, true);
}

void
NewUserWizard::rescale_ui ()
{
	int rn = ui_font_scale.get_active_row_number ();
	if (rn < 0) {
		return;
	}
	float ui_scale = 100 + rn * 50;
	UIConfiguration::instance ().set_font_scale (1024 * ui_scale);
	UIConfiguration::instance ().reset_dpi ();
}

void
NewUserWizard::default_dir_changed ()
{
	Config->set_default_session_parent_dir (default_dir_chooser->get_filename());
	// make new session folder chooser point to the new default
	new_folder_chooser.set_current_folder (Config->get_default_session_parent_dir());
	default_dir_label->set_text (Config->get_default_session_parent_dir());
	config_modified = true;
}

void
NewUserWizard::clip_lib_changed ()
{
	Config->set_clip_library_dir (clip_lib_chooser->get_filename());
	clip_lib_label->set_text (clip_lib_chooser->get_filename());
	config_modified = true;
}

void
NewUserWizard::setup_first_time_config_page ()
{
	default_dir_chooser = manage (new FileChooserButton (string_compose (_("Default folder for %1 sessions"), PROGRAM_NAME),
							     FILE_CHOOSER_ACTION_SELECT_FOLDER));
	default_dir_label = manage (new Label);

	Gtk::Label* txt = manage (new Label);
	HBox* hbox = manage (new HBox);
	VBox* vbox = manage (new VBox);

	txt->set_markup (string_compose (_("<span size=\"larger\">\
Each project that you work on with %1 has its own folder.\n\
These can require a lot of disk space if you are recording audio.\n\
\n\
Where would you like new %1 sessions to be stored by default?\n\n\
<i>(You can put new sessions anywhere, this is just a default)</i></span>"), PROGRAM_NAME));
	txt->set_alignment (0.0, 0.0);
	txt->set_justify (JUSTIFY_FILL);

	vbox->set_spacing (18);
	vbox->set_border_width (24);

	hbox->pack_start (*default_dir_chooser, false, true, 8);
	hbox->pack_start (*default_dir_label, false, false, 8);

	vbox->pack_start (*txt, false, false);
	vbox->pack_start (*hbox, false, true);

	default_dir_label->set_text (poor_mans_glob (Config->get_default_session_parent_dir()));

	Gtkmm2ext::add_volume_shortcuts (*default_dir_chooser);
	default_dir_chooser->set_title (_("Default Session Location"));
	default_dir_chooser->set_current_folder (poor_mans_glob (Config->get_default_session_parent_dir()));
	default_dir_chooser->signal_selection_changed().connect (sigc::mem_fun (*this, &NewUserWizard::default_dir_changed));
	default_dir_chooser->show ();

	vbox->show_all ();

	append_page (*vbox);
	set_page_title (*vbox, _("Default folder for new sessions"));
	set_page_header_image (*vbox, icon_pixbuf);
	set_page_type (*vbox, ASSISTANT_PAGE_CONTENT);

	/* user can just skip all these settings if they want to */

	set_page_complete (*vbox, true);
}

void
NewUserWizard::setup_clip_lib_page ()
{
	clip_lib_chooser = manage (new FileChooserButton (string_compose (_("Default folder where %1 should look for samples"), PROGRAM_NAME),
	                                                    FILE_CHOOSER_ACTION_SELECT_FOLDER));
	clip_lib_label = manage (new Label);

	Gtk::Label* txt = manage (new Label);
	HBox* hbox = manage (new HBox);
	VBox* vbox = manage (new VBox);

	txt->set_markup (string_compose (_("<span size=\"larger\">\
If you have an existing collection of samples, telling %1\n\
where they are will make it easier to find them in the program.\
\n\
\n\
Where would you like %1 to look for samples by default? If you\n\
don't have any samples, just leave this setting as it is.\n\n\
<i>(You can store samples anywhere you want, this is just an initial default)</i></span>"), PROGRAM_NAME));
	txt->set_alignment (0.0, 0.0);
	txt->set_justify (JUSTIFY_FILL);

	vbox->set_spacing (18);
	vbox->set_border_width (24);

	hbox->pack_start (*clip_lib_chooser, false, true, 8);
	hbox->pack_start (*clip_lib_label, false, false, 8);

	vbox->pack_start (*txt, false, false);
	vbox->pack_start (*hbox, false, true);

	clip_lib_label->set_text (ARDOUR::platform_default_clip_library_dir());

	Gtkmm2ext::add_volume_shortcuts (*clip_lib_chooser);
	clip_lib_chooser->set_title (_("Default sample library location"));
	clip_lib_chooser->set_current_folder (ARDOUR::platform_default_clip_library_dir());
	clip_lib_chooser->signal_selection_changed().connect (sigc::mem_fun (*this, &NewUserWizard::clip_lib_changed));
	clip_lib_chooser->show ();

	vbox->show_all ();

	append_page (*vbox);
	set_page_title (*vbox, _("Default Sample Library Location"));
	set_page_header_image (*vbox, icon_pixbuf);
	set_page_type (*vbox, ASSISTANT_PAGE_CONTENT);

	/* user can just skip all these settings if they want to */

	set_page_complete (*vbox, true);
}

void
NewUserWizard::setup_final_page ()
{
	string msg = string_compose (_("%1 is ready for use"), PROGRAM_NAME);

	Gtk::Label* final_label = manage (new Label);
	final_label->set_markup (string_compose ("<span weight=\"bold\" size=\"larger\">%1</span>", msg));
	final_label->show ();

	VBox* vbox = manage (new VBox);
	vbox->pack_start (*final_label, true, true);
	vbox->show ();

	append_page (*vbox);
	set_page_complete (*vbox, true);
	set_page_header_image (*vbox, icon_pixbuf);
	set_page_type (*vbox, ASSISTANT_PAGE_CONFIRM);
}

void
NewUserWizard::on_cancel ()
{
	_signal_response (int (RESPONSE_CANCEL));
}

bool
NewUserWizard::on_delete_event (GdkEventAny*)
{
	_signal_response (int (RESPONSE_CLOSE));
	return true;
}

void
NewUserWizard::on_apply ()
{
	/* file-chooser button does not emit 'current_folder_changed' signal
	 * when a folder from the dropdown or the sidebar is chosen.
	 * -> explicitly poll for the dir as suggested by the gtk documentation.
	 */
	if (default_dir_chooser && default_dir_chooser->get_filename() != Config->get_default_session_parent_dir ()) {
		config_modified = true;
	}

	if (config_modified) {

		if (default_dir_chooser) {
			Config->set_default_session_parent_dir (default_dir_chooser->get_filename());
		}

		Config->save_state ();
	}

	{
		/* "touch" the been-here-before path now we've successfully
		   made it through the first time setup (at least)
		*/
		PBD::ScopedFileDescriptor fout (g_open (been_here_before_path ().c_str(), O_CREAT|O_TRUNC|O_RDWR, 0666));

	}

	ARDOUR_UI::instance()->copy_demo_sessions ();


	_signal_response (int (RESPONSE_OK));
}


void
NewUserWizard::move_along_now ()
{
	on_apply ();
}

void
NewUserWizard::on_show ()
{
	Gtk::Assistant::on_show ();
	push_splash ();
}

void
NewUserWizard::on_unmap ()
{
	pop_splash ();
	Gtk::Assistant::on_unmap ();
}

void
NewUserWizard::pop_splash ()
{
	if (_splash_pushed) {
		Splash* spl = Splash::exists () ? Splash::instance() : NULL;
		if (spl) {
			spl->pop_front_for (*this);
		}
		_splash_pushed = false;
	}
}


void
NewUserWizard::push_splash ()
{
	if (Splash::exists()) {
		Splash* spl = Splash::instance();
		if (spl->get_visible()) {
			spl->pop_back_for (*this);
			_splash_pushed = true;
		}
	}
}