#include <iostream>
#include <cstdlib>
#include <getopt.h>

#include <glibmm.h>

#include "pbd/convert.h"
#include "pbd/failed_constructor.h"
#include "pbd/error.h"
#include "pbd/debug.h"

#include "ardour/ardour.h"
#include "ardour/audioengine.h"
#include "ardour/revision.h"
#include "ardour/session.h"

#include "control_protocol/control_protocol.h"

#include "misc.h"

using namespace std;
using namespace ARDOUR;
using namespace PBD;

#ifdef PLATFORM_WINDOWS
#include <windows.h>
#define sleep(X) Sleep((X) * 1000)
#endif

static const char* localedir = LOCALEDIR;

static string backend_client_name;
static string backend_name = "JACK";
static volatile bool run_headless = true;

TestReceiver test_receiver;

/** @param dir Session directory.
 *  @param state Session state file, without .ardour suffix.
 */
static Session *
load_session (string dir, string state)
{
	SessionEvent::create_per_thread_pool ("test", 512);

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

	AudioEngine* engine = AudioEngine::create ();

	if (!engine->set_backend (backend_name, backend_client_name, "")) {
		std::cerr << "Cannot set Audio/MIDI engine backend\n";
		::exit (1);
	}

	if (engine->start () != 0) {
		std::cerr << "Cannot start Audio/MIDI engine\n";
		::exit (1);
	}

	Session* session = new Session (*engine, dir, state);
	engine->set_session (session);
	return session;
}

static void
access_action (const std::string& action_group, const std::string& action_item)
{
	if (action_group == "Common" && action_item == "Quit") {
		run_headless = false;
	}
}

static void
engine_halted (const char* reason)
{
	cerr << "The audio backend has either been shutdown";
	if (reason && strlen (reason) > 0) {
		cerr << ": " << reason;
	} else {
		cerr << ".";
	}
	cerr << endl;
	run_headless = false;
}

static void
print_version ()
{
	cout
		<< PROGRAM_NAME
		<< VERSIONSTRING
		<< " (built using "
		<< ARDOUR::revision
#ifdef __GNUC__
		<< " and GCC version " << __VERSION__
#endif
		<< ')'
		<< endl;
}

static void
print_help ()
{
	cout << "Usage: hardour [OPTIONS]... DIR SNAPSHOT_NAME\n\n"
	     << "  DIR                         Directory/Folder to load session from\n"
	     << "  SNAPSHOT_NAME               Name of session/snapshot to load (without .ardour at end\n"
	     << "  -v, --version               Show version information\n"
	     << "  -h, --help                  Print this message\n"
	     << "  -c, --name <name>           Use a specific backend client name, default is ardour\n"
	     << "  -d, --disable-plugins       Disable all plugins in an existing session\n"
	     << "  -D, --debug <options>       Set debug flags. Use \"-D list\" to see available options\n"
	     << "  -O, --no-hw-optimizations   Disable h/w specific optimizations\n"
	     << "  -P, --no-connect-ports      Do not connect any ports at startup\n"
#ifdef WINDOWS_VST_SUPPORT
	     << "  -V, --novst                 Do not use VST support\n"
#endif
		;
}

int main (int argc, char* argv[])
{
	const char *optstring = "vhBdD:c:VOU:P";

	const struct option longopts[] = {
		{ "version", 0, 0, 'v' },
		{ "help", 0, 0, 'h' },
		{ "bypass-plugins", 1, 0, 'B' },
		{ "disable-plugins", 1, 0, 'd' },
		{ "debug", 1, 0, 'D' },
		{ "name", 1, 0, 'c' },
		{ "novst", 0, 0, 'V' },
		{ "no-hw-optimizations", 0, 0, 'O' },
		{ "uuid", 1, 0, 'U' },
		{ "no-connect-ports", 0, 0, 'P' },
		{ 0, 0, 0, 0 }
	};

	int option_index = 0;
	int c = 0;

	bool use_vst = true;
	bool try_hw_optimization = true;

	backend_client_name = PBD::downcase (std::string(PROGRAM_NAME));

	while (1) {
		c = getopt_long (argc, argv, optstring, longopts, &option_index);

		if (c == -1) {
			break;
		}

		switch (c) {
		case 0:
			break;

		case 'v':
			print_version ();
			::exit (0);
			break;

		case 'h':
			print_help ();
			exit (0);
			break;

		case 'c':
			backend_client_name = optarg;
			break;

		case 'B':
			ARDOUR::Session::set_bypass_all_loaded_plugins (true);
			break;

		case 'd':
			ARDOUR::Session::set_disable_all_loaded_plugins (true);
			break;

		case 'D':
			if (PBD::parse_debug_options (optarg)) {
				::exit (1);
			}
			break;

		case 'O':
			try_hw_optimization = false;
			break;

		case 'P':
			ARDOUR::Port::set_connecting_blocked (true);
			break;

		case 'V':
#ifdef WINDOWS_VST_SUPPORT
			use_vst = false;
#endif /* WINDOWS_VST_SUPPORT */
			break;

		default:
			print_help ();
			::exit (1);
		}
	}

	if (argc < 3) {
		print_help ();
		::exit (1);
	}

	if (!ARDOUR::init (use_vst, try_hw_optimization, localedir)) {
		cerr << "Ardour failed to initialize\n" << endl;
		::exit (1);
	}

	Session* s = 0;

	try {
		s = load_session (argv[optind], argv[optind+1]);
	} catch (failed_constructor& e) {
		cerr << "failed_constructor: " << e.what() << "\n";
		exit (EXIT_FAILURE);
	} catch (AudioEngine::PortRegistrationFailure& e) {
		cerr << "PortRegistrationFailure: " << e.what() << "\n";
		exit (EXIT_FAILURE);
	} catch (exception& e) {
		cerr << "exception: " << e.what() << "\n";
		exit (EXIT_FAILURE);
	} catch (...) {
		cerr << "unknown exception.\n";
		exit (EXIT_FAILURE);
	}

	PBD::ScopedConnectionList con;
	BasicUI::AccessAction.connect_same_thread (con, boost::bind (&access_action, _1, _2));
	AudioEngine::instance()->Halted.connect_same_thread (con, boost::bind (&engine_halted, _1));

	s->request_transport_speed (1.0);

	while (run_headless) {
		Glib::usleep (500000);
	}

	AudioEngine::instance()->remove_session ();
	delete s;
	AudioEngine::instance()->stop ();

	AudioEngine::destroy ();

	return 0;
}