/*
    Copyright (C) 2001-2012 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.

*/

#include <cstdlib>
#include <signal.h>
#include <cerrno>
#include <fstream>
#include <vector>

#include <sigc++/bind.h>
#include <gtkmm/settings.h>

#include "pbd/error.h"
#include "pbd/epa.h"
#include "pbd/file_utils.h"
#include "pbd/textreceiver.h"
#include "pbd/failed_constructor.h"
#include "pbd/pthread_utils.h"
#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
#include "pbd/boost_debug.h"
#endif

#include <jack/jack.h>

#include "ardour/svn_revision.h"
#include "ardour/version.h"
#include "ardour/ardour.h"
#include "ardour/audioengine.h"
#include "ardour/session_utils.h"
#include "ardour/filesystem_paths.h"

#include <gtkmm/main.h>
#include <gtkmm2ext/application.h>
#include <gtkmm2ext/popup.h>
#include <gtkmm2ext/utils.h>

#include "version.h"
#include "utils.h"
#include "ardour_ui.h"
#include "opts.h"
#include "enums.h"

#include "i18n.h"

using namespace std;
using namespace Gtk;
using namespace ARDOUR_COMMAND_LINE;
using namespace ARDOUR;
using namespace PBD;

TextReceiver text_receiver ("ardour");

extern int curvetest (string);

static ARDOUR_UI  *ui = 0;
static const char* localedir = LOCALEDIR;

void
gui_jack_error ()
{
	MessageDialog win (string_compose (_("%1 could not connect to JACK."), PROGRAM_NAME),
	                   false,
	                   Gtk::MESSAGE_INFO,
	                   Gtk::BUTTONS_NONE);
win.set_secondary_text(_("There are several possible reasons:\n\
\n\
1) JACK is not running.\n\
2) JACK is running as another user, perhaps root.\n\
3) There is already another client called \"ardour\".\n\
\n\
Please consider the possibilities, and perhaps (re)start JACK."));

	win.add_button (Stock::QUIT, RESPONSE_CLOSE);
	win.set_default_response (RESPONSE_CLOSE);

	win.show_all ();
	win.set_position (Gtk::WIN_POS_CENTER);

	if (!no_splash) {
		ui->hide_splash ();
	}

	/* we just don't care about the result, but we want to block */

	win.run ();
}

static void export_search_path (const string& base_dir, const char* varname, const char* dir)
{
	string path;
	const char * cstr = getenv (varname);

	if (cstr) {
		path = cstr;
		path += ':';
	} else {
		path = "";
	}
	path += base_dir;
	path += dir;

	setenv (varname, path.c_str(), 1);
}

#ifdef __APPLE__

#include <mach-o/dyld.h>
#include <sys/param.h>

extern void set_language_preference (); // cocoacarbon.mm

void
fixup_bundle_environment (int, char* [])
{
	if (!getenv ("ARDOUR_BUNDLED")) {
		return;
	}

	EnvironmentalProtectionAgency::set_global_epa (new EnvironmentalProtectionAgency (true, "PREBUNDLE_ENV"));

	set_language_preference ();

	char execpath[MAXPATHLEN+1];
	uint32_t pathsz = sizeof (execpath);

	_NSGetExecutablePath (execpath, &pathsz);

	std::string path;
	std::string exec_dir = Glib::path_get_dirname (execpath);
	std::string bundle_dir;
	std::string userconfigdir = user_config_directory();

	bundle_dir = Glib::path_get_dirname (exec_dir);

	export_search_path (bundle_dir, "ARDOUR_DLL_PATH", "/lib");

	/* inside an OS X .app bundle, there is no difference
	   between DATA and CONFIG locations, since OS X doesn't
	   attempt to do anything to expose the notion of
	   machine-independent shared data.
	*/

	export_search_path (bundle_dir, "ARDOUR_DATA_PATH", "/Resources");
	export_search_path (bundle_dir, "ARDOUR_CONFIG_PATH", "/Resources");
	export_search_path (bundle_dir, "ARDOUR_INSTANT_XML_PATH", "/Resources");
	export_search_path (bundle_dir, "LADSPA_PATH", "/Plugins");
	export_search_path (bundle_dir, "VAMP_PATH", "/lib");
	export_search_path (bundle_dir, "SUIL_MODULE_DIR", "/lib");
	export_search_path (bundle_dir, "GTK_PATH", "/lib/clearlooks");

	/* unset GTK_RC_FILES so that we only load the RC files that we define
	 */

	unsetenv ("GTK_RC_FILES");

	if (!ARDOUR::translations_are_disabled ()) {
		export_search_path (bundle_dir, "GTK_LOCALEDIR", "/Resources/locale");
	}

	/* write a pango.rc file and tell pango to use it. we'd love
	   to put this into the PROGRAM_NAME.app bundle and leave it there,
	   but the user may not have write permission. so ...

	   we also have to make sure that the user ardour directory
	   actually exists ...
	*/

	if (g_mkdir_with_parents (userconfigdir.c_str(), 0755) < 0) {
		error << string_compose (_("cannot create user ardour folder %1 (%2)"), userconfigdir, strerror (errno))
		      << endmsg;
	} else {
		
		path = Glib::build_filename (userconfigdir, "pango.rc");
		std::ofstream pangorc (path.c_str());
		if (!pangorc) {
			error << string_compose (_("cannot open pango.rc file %1") , path) << endmsg;
		} else {
			pangorc << "[Pango]\nModuleFiles="
				<< Glib::build_filename (bundle_dir, "Resources/pango.modules") 
				<< endl;
			pangorc.close ();
			
			setenv ("PANGO_RC_FILE", path.c_str(), 1);
		}
	}
	
	setenv ("CHARSETALIASDIR", bundle_dir.c_str(), 1);
	setenv ("FONTCONFIG_FILE", Glib::build_filename (bundle_dir, "Resources/fonts.conf").c_str(), 1);
	setenv ("GDK_PIXBUF_MODULE_FILE", Glib::build_filename (bundle_dir, "Resources/gdk-pixbuf.loaders").c_str(), 1);
}

#else

void
fixup_bundle_environment (int /*argc*/, char* argv[])
{
	/* THIS IS FOR LINUX - its just about the only place where its
	 * acceptable to build paths directly using '/'.
	 */

	if (!getenv ("ARDOUR_BUNDLED")) {
		return;
	}

	EnvironmentalProtectionAgency::set_global_epa (new EnvironmentalProtectionAgency (true, "PREBUNDLE_ENV"));

	std::string path;
	std::string dir_path = Glib::path_get_dirname (Glib::path_get_dirname (argv[0]));
	std::string userconfigdir = user_config_directory();

	/* note that this function is POSIX/Linux specific, so using / as
	   a dir separator in this context is just fine.
	*/

	export_search_path (dir_path, "ARDOUR_DLL_PATH", "/lib");
	export_search_path (dir_path, "ARDOUR_CONFIG_PATH", "/etc");
	export_search_path (dir_path, "ARDOUR_INSTANT_XML_PATH", "/share");
	export_search_path (dir_path, "ARDOUR_DATA_PATH", "/share");
	export_search_path (dir_path, "LADSPA_PATH", "/plugins");
	export_search_path (dir_path, "VAMP_PATH", "/lib");
	export_search_path (dir_path, "SUIL_MODULE_DIR", "/lib");

	export_search_path (dir_path, "GTK_PATH", "/lib/clearlooks");

	/* unset GTK_RC_FILES so that we only load the RC files that we define
	 */

	unsetenv ("GTK_RC_FILES");

	if (!ARDOUR::translations_are_disabled ()) {
		export_search_path (dir_path, "GTK_LOCALEDIR", "/share/locale");
	}

	/* Tell fontconfig where to find fonts.conf. Use the system version
	   if it exists, otherwise use the stuff we included in the bundle
	*/

	if (Glib::file_test ("/etc/fonts/fonts.conf", Glib::FILE_TEST_EXISTS)) {
		setenv ("FONTCONFIG_FILE", "/etc/fonts/fonts.conf", 1);
		setenv ("FONTCONFIG_PATH", "/etc/fonts", 1);
	} else {
		/* use the one included in the bundle */
		
		path = Glib::build_filename (dir_path, "etc/fonts/fonts.conf");
		setenv ("FONTCONFIG_FILE", path.c_str(), 1);
		export_search_path (dir_path, "FONTCONFIG_PATH", "/etc/fonts");
	}

	/* write a pango.rc file and tell pango to use it. we'd love
	   to put this into the Ardour.app bundle and leave it there,
	   but the user may not have write permission. so ...

	   we also have to make sure that the user ardour directory
	   actually exists ...
	*/

	if (g_mkdir_with_parents (userconfigdir.c_str(), 0755) < 0) {
		error << string_compose (_("cannot create user ardour folder %1 (%2)"), userconfigdir, strerror (errno))
		      << endmsg;
	} else {
		
		path = Glib::build_filename (userconfigdir, "pango.rc");
		std::ofstream pangorc (path.c_str());
		if (!pangorc) {
			error << string_compose (_("cannot open pango.rc file %1") , path) << endmsg;
		} else {
			pangorc << "[Pango]\nModuleFiles="
				<< Glib::build_filename (userconfigdir, "pango.modules")
				<< endl;
			pangorc.close ();
		}
		
		setenv ("PANGO_RC_FILE", path.c_str(), 1);
		
		/* similar for GDK pixbuf loaders, but there's no RC file required
		   to specify where it lives.
		*/
		
		setenv ("GDK_PIXBUF_MODULE_FILE", Glib::build_filename (userconfigdir, "gdk-pixbuf.loaders").c_str(), 1);
	}

        /* this doesn't do much but setting it should prevent various parts of the GTK/GNU stack
           from looking outside the bundle to find the charset.alias file.
        */
        setenv ("CHARSETALIASDIR", dir_path.c_str(), 1);

}

#endif

static gboolean
tell_about_jack_death (void* /* ignored */)
{
	if (AudioEngine::instance()->processed_frames() == 0) {
		/* died during startup */
		MessageDialog msg (_("JACK exited"), false);
		msg.set_position (Gtk::WIN_POS_CENTER);
		msg.set_secondary_text (string_compose (_(
"JACK exited unexpectedly, and without notifying %1.\n\
\n\
This could be due to misconfiguration or to an error inside JACK.\n\
\n\
Click OK to exit %1."), PROGRAM_NAME));

		msg.run ();
		_exit (0);

	} else {

		/* engine has already run, so this is a mid-session JACK death */

		MessageDialog* msg = manage (new MessageDialog (_("JACK exited"), false));
		msg->set_secondary_text (string_compose (_(
"JACK exited unexpectedly, and without notifying %1.\n\
\n\
This is probably due to an error inside JACK. You should restart JACK\n\
and reconnect %1 to it, or exit %1 now. You cannot save your\n\
session at this time, because we would lose your connection information.\n"), PROGRAM_NAME));
		msg->present ();
	}
	return false; /* do not call again */
}

static void
sigpipe_handler (int /*signal*/)
{
	/* XXX fix this so that we do this again after a reconnect to JACK
	 */

	static bool done_the_jack_thing = false;

	if (!done_the_jack_thing) {
		AudioEngine::instance()->died ();
		g_idle_add (tell_about_jack_death, 0);
		done_the_jack_thing =  true;
	}
}

#ifdef WINDOWS_VST_SUPPORT

extern int windows_vst_gui_init (int* argc, char** argv[]);

/* this is called from the entry point of a wine-compiled
   executable that is linked against gtk2_ardour built
   as a shared library.
*/
extern "C" {
int ardour_main (int argc, char *argv[])
#else
int main (int argc, char *argv[])
#endif
{
	fixup_bundle_environment (argc, argv);

	if (!Glib::thread_supported()) {
		Glib::thread_init();
	}

	gtk_set_locale ();

#ifdef WINDOWS_VST_SUPPORT
	/* this does some magic that is needed to make GTK and Wine's own
	   X11 client interact properly.
	*/
	windows_vst_gui_init (&argc, &argv);
#endif

	(void) bindtextdomain (PACKAGE, localedir);
	/* our i18n translations are all in UTF-8, so make sure
	   that even if the user locale doesn't specify UTF-8,
	   we use that when handling them.
	*/
	(void) bind_textdomain_codeset (PACKAGE,"UTF-8");
	(void) textdomain (PACKAGE);

	pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);

	// catch error message system signals ();

	text_receiver.listen_to (error);
	text_receiver.listen_to (info);
	text_receiver.listen_to (fatal);
	text_receiver.listen_to (warning);

#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
	if (getenv ("BOOST_DEBUG")) {
		boost_debug_shared_ptr_show_live_debugging (true);
	}
#endif

	if (parse_opts (argc, argv)) {
		exit (1);
	}

	if (curvetest_file) {
		return curvetest (curvetest_file);
	}

	cout << PROGRAM_NAME
	     << VERSIONSTRING
	     << _(" (built using ")
	     << svn_revision
#ifdef __GNUC__
	     << _(" and GCC version ") << __VERSION__
#endif
	     << ')'
	     << endl;

	if (just_version) {
		exit (0);
	}

	if (no_splash) {
		cerr << _("Copyright (C) 1999-2012 Paul Davis") << endl
		     << _("Some portions Copyright (C) Steve Harris, Ari Johnson, Brett Viren, Joel Baker") << endl
		     << endl
		     << string_compose (_("%1 comes with ABSOLUTELY NO WARRANTY"), PROGRAM_NAME) << endl
		     <<	_("not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.") << endl
		     << _("This is free software, and you are welcome to redistribute it ") << endl
		     << _("under certain conditions; see the source for copying conditions.")
		     << endl;
	}

	/* some GUI objects need this */

	PBD::ID::init ();

	if (::signal (SIGPIPE, sigpipe_handler)) {
		cerr << _("Cannot xinstall SIGPIPE error handler") << endl;
	}

	try {
		ui = new ARDOUR_UI (&argc, &argv);
	} catch (failed_constructor& err) {
		error << _("could not create ARDOUR GUI") << endmsg;
		exit (1);
	}

	ui->run (text_receiver);
	Gtkmm2ext::Application::instance()->cleanup();
	ui = 0;

	ARDOUR::cleanup ();
	pthread_cancel_all ();

	return 0;
}
#ifdef WINDOWS_VST_SUPPORT
} // end of extern C block
#endif