/*
    Copyright (C) 2010 Paul Davis

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

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

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

#include "pbd/gstdio_compat.h"

#include <gtkmm/main.h>
#include <gtkmm/filechooser.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/stacktrace.h"
#include "pbd/openuri.h"

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

#include "startup.h"
#include "opts.h"
#include "engine_dialog.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;

ArdourStartup* ArdourStartup::the_startup = 0;

ArdourStartup::ArdourStartup ()
	: _response (RESPONSE_OK)
	, config_modified (false)
	, default_dir_chooser (0)
	, monitor_via_hardware_button (string_compose (_("Use an external mixer or the hardware mixer of your audio interface.\n"
							 "%1 will play NO role in monitoring"), PROGRAM_NAME))
	, monitor_via_ardour_button (string_compose (_("Ask %1 to play back material as it is being recorded"), PROGRAM_NAME))
	, audio_page_index (-1)
	, new_user_page_index (-1)
	, default_folder_page_index (-1)
	, monitoring_page_index (-1)
	, final_page_index (-1)
{
	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_monitoring_choice_page ();
	setup_monitor_section_choice_page ();
	setup_final_page ();

	the_startup = this;
}

ArdourStartup::~ArdourStartup ()
{
}

bool
ArdourStartup::required ()
{
	/* look for a "been here before" file for this version or earlier
	 * versions
	 */

	const int current_version = atoi (PROGRAM_VERSION);

	for (int v = current_version; v != 0; --v) {
		if (Glib::file_test (ARDOUR::been_here_before_path (v), Glib::FILE_TEST_EXISTS)) {
			if (v != current_version) {
				/* older version exists, create the current one */
				PBD::ScopedFileDescriptor fout (g_open (been_here_before_path (current_version).c_str(), O_CREAT|O_TRUNC|O_RDWR, 0666));
			}
			return false;
		}
	}

	return true;
}

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

	foomatic->set_markup (string_compose (_("\
<span size=\"larger\">%1 is a digital audio workstation. You can use it to \
record, edit and mix multi-track audio. You can produce your \
own CDs, mix video soundtracks, or experiment with new \
ideas about music and sound. \
\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 ();

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

	vbox->set_border_width (24);

	hbox->pack_start (*foomatic, true, true);
	vbox->pack_start (*hbox, true, true);

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

	new_user_page_index = 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
ArdourStartup::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());
	config_changed ();
}

void
ArdourStartup::config_changed ()
{
	config_modified = true;
}

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

	txt->set_markup (string_compose (_("\
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>"), PROGRAM_NAME));
	txt->set_alignment (0.0, 0.0);

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

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

	cerr << "set default folder to " << poor_mans_glob (Config->get_default_session_parent_dir()) << endl;
	default_dir_chooser->set_current_folder (poor_mans_glob (Config->get_default_session_parent_dir()));
	default_dir_chooser->signal_current_folder_changed().connect (sigc::mem_fun (*this, &ArdourStartup::default_dir_changed));
	default_dir_chooser->show ();

	vbox->show_all ();

	default_folder_page_index = 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
ArdourStartup::setup_monitoring_choice_page ()
{
	mon_vbox.set_spacing (18);
	mon_vbox.set_border_width (24);

	HBox* hbox = manage (new HBox);
	VBox* vbox = manage (new VBox);
	/* first button will be on by default */
	RadioButton::Group g (monitor_via_ardour_button.get_group());
	monitor_via_hardware_button.set_group (g);

	monitor_label.set_markup(_("\
While recording instruments or vocals, you probably want to listen to the\n\
signal as well as record it. This is called \"monitoring\". There are\n\
different ways to do this depending on the equipment you have and the\n\
configuration of that equipment. The two most common are presented here.\n\
Please choose whichever one is right for your setup.\n\n\
<i>(You can change this preference at any time, via the Preferences dialog)</i>\n\n\
<i>If you do not understand what this is about, just accept the default.</i>"));
	monitor_label.set_alignment (0.0, 0.0);

	vbox->set_spacing (6);

	vbox->pack_start (monitor_via_hardware_button, false, true);
	vbox->pack_start (monitor_via_ardour_button, false, true);
	hbox->pack_start (*vbox, true, true, 8);
	mon_vbox.pack_start (monitor_label, false, false);
	mon_vbox.pack_start (*hbox, false, false);

	mon_vbox.show_all ();

	monitoring_page_index = append_page (mon_vbox);
	set_page_title (mon_vbox, _("Monitoring Choices"));
	set_page_header_image (mon_vbox, icon_pixbuf);

	/* user could just click on "Forward" if default
	 * choice is correct.
	 */

	set_page_complete (mon_vbox, true);
}

void
ArdourStartup::setup_monitor_section_choice_page ()
{
	mon_sec_vbox.set_spacing (18);
	mon_sec_vbox.set_border_width (24);

	HBox* hbox = manage (new HBox);
	VBox* main_vbox = manage (new VBox);
	VBox* vbox;
	Label* l = manage (new Label);

	main_vbox->set_spacing (32);

	no_monitor_section_button.set_label (_("Use a Master bus directly"));
	l->set_alignment (0.0, 1.0);
	l->set_markup(_("Connect the Master bus directly to your hardware outputs. This is preferable for simple usage."));

	vbox = manage (new VBox);
	vbox->set_spacing (6);
	vbox->pack_start (no_monitor_section_button, false, true);
	vbox->pack_start (*l, false, true);

	main_vbox->pack_start (*vbox, false, false);

	use_monitor_section_button.set_label (_("Use an additional Monitor bus"));
	l = manage (new Label);
	l->set_alignment (0.0, 1.0);
	l->set_text (_("Use a Monitor bus between Master bus and hardware outputs for \n\
greater control in monitoring without affecting the mix."));

	vbox = manage (new VBox);
	vbox->set_spacing (6);
	vbox->pack_start (use_monitor_section_button, false, true);
	vbox->pack_start (*l, false, true);

	main_vbox->pack_start (*vbox, false, false);

	RadioButton::Group g (use_monitor_section_button.get_group());
	no_monitor_section_button.set_group (g);

	if (Config->get_use_monitor_bus()) {
		use_monitor_section_button.set_active (true);
	} else {
		no_monitor_section_button.set_active (true);
	}

	use_monitor_section_button.signal_toggled().connect (sigc::mem_fun (*this, &ArdourStartup::config_changed));
	no_monitor_section_button.signal_toggled().connect (sigc::mem_fun (*this, &ArdourStartup::config_changed));

	monitor_section_label.set_markup(_("<i>You can change this preference at any time via the Preferences dialog.\nYou can also add or remove the monitor section to/from any session.</i>\n\n\
<i>If you do not understand what this is about, just accept the default.</i>"));
	monitor_section_label.set_alignment (0.0, 0.0);

	hbox->pack_start (*main_vbox, true, true, 8);
	mon_sec_vbox.pack_start (*hbox, false, false);
	mon_sec_vbox.pack_start (monitor_section_label, false, false);

	mon_sec_vbox.show_all ();

	monitor_section_page_index = append_page (mon_sec_vbox);
	set_page_title (mon_sec_vbox, _("Monitor Section"));
	set_page_header_image (mon_sec_vbox, icon_pixbuf);

	/* user could just click on "Forward" if default
	 * choice is correct.
	 */

	set_page_complete (mon_sec_vbox, true);
}

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

	plugin_disco_button.signal_clicked().connect (sigc::mem_fun(*this, &ArdourStartup::discover_plugins));
	plugin_disco_button.set_label (_("Scan for Plugins"));
	plugin_disco_button.show ();

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

	VBox* vbox = manage (new VBox);
	vbox->pack_start (*final_label, true, true);
	if (!Profile->get_mixbus()) {
		vbox->pack_start (plugin_disco_button, true, false);
	}
	vbox->show ();

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

void
ArdourStartup::discover_plugins () {
	plugin_disco_button.set_sensitive (false);
	PluginManager::instance().refresh();
}

void
ArdourStartup::on_cancel ()
{
	_response = RESPONSE_CANCEL;
	gtk_main_quit ();
}

bool
ArdourStartup::on_delete_event (GdkEventAny*)
{
	_response = RESPONSE_CLOSE;
	gtk_main_quit ();
	return true;
}

void
ArdourStartup::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());
		}

		if (monitor_via_hardware_button.get_active()) {
			Config->set_monitoring_model (ExternalMonitoring);
		} else if (monitor_via_ardour_button.get_active()) {
			Config->set_monitoring_model (SoftwareMonitoring);
		}

		Config->set_use_monitor_bus (use_monitor_section_button.get_active());

		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));

	}

	_response = RESPONSE_OK;
	gtk_main_quit ();
}


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