/*
  This file is part of Ingen.
  Copyright 2007-2012 David Robillard <http://drobilla.net/>

  Ingen is free software: you can redistribute it and/or modify it under the
  terms of the GNU Affero General Public License as published by the Free
  Software Foundation, either version 3 of the License, or any later version.

  Ingen 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 Affero General Public License for details.

  You should have received a copy of the GNU Affero General Public License
  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <signal.h>
#include <stdlib.h>

#include <iostream>
#include <string>

#include <glibmm/thread.h>
#include <glibmm/timer.h>

#include "raul/Path.hpp"

#include "ingen_config.h"

#include "ingen/Configuration.hpp"
#include "ingen/EngineBase.hpp"
#include "ingen/Interface.hpp"
#include "ingen/Log.hpp"
#include "ingen/World.hpp"
#include "ingen/client/ThreadedSigClientInterface.hpp"
#include "ingen/runtime_paths.hpp"
#include "ingen/serialisation/Parser.hpp"
#include "ingen/types.hpp"
#ifdef WITH_BINDINGS
#include "bindings/ingen_bindings.hpp"
#endif
#ifdef HAVE_SOCKET
#include "ingen/client/SocketClient.hpp"
#endif

using namespace std;
using namespace Ingen;

Ingen::World* world = NULL;

static void
ingen_interrupt(int signal)
{
	if (signal == SIGTERM) {
		cerr << "ingen: Terminated" << endl;
		delete world;
		exit(EXIT_FAILURE);
	} else {
		cout << "ingen: Interrupted" << endl;
		if (world && world->engine()) {
			world->engine()->quit();
		}
	}
}

static void
ingen_try(bool cond, const char* msg)
{
	if (!cond) {
		cerr << "ingen: Error: " << msg << endl;
		delete world;
		exit(EXIT_FAILURE);
	}
}

static int
print_version()
{
	cout << "ingen " << INGEN_VERSION
	     << " <http://drobilla.net/software/ingen>\n"
	     << "Copyright 2007-2015 David Robillard <http://drobilla.net>.\n"
	     << "License: <https://www.gnu.org/licenses/agpl-3.0>\n"
	     << "This is free software; you are free to change and redistribute it.\n"
	     << "There is NO WARRANTY, to the extent permitted by law." << endl;
	return EXIT_SUCCESS;
}

int
main(int argc, char** argv)
{
	Glib::thread_init();
	Ingen::set_bundle_path_from_code((void*)&main);

	// Create world
	try {
		world = new Ingen::World(argc, argv, NULL, NULL, NULL);
		if (argc <= 1) {
			world->conf().print_usage("ingen", cout);
			return EXIT_FAILURE;
		} else if (world->conf().option("help").get<int32_t>()) {
			world->conf().print_usage("ingen", cout);
			return EXIT_SUCCESS;
		} else if (world->conf().option("version").get<int32_t>()) {
			return print_version();
		}
	} catch (std::exception& e) {
		cout << "ingen: " << e.what() << endl;
		return EXIT_FAILURE;
	}

	Configuration& conf = world->conf();
	if (conf.option("uuid").is_valid()) {
		world->set_jack_uuid(conf.option("uuid").ptr<char>());
	}

	// Run engine
	SPtr<Interface> engine_interface;
	if (conf.option("engine").get<int32_t>()) {
		ingen_try(world->load_module("server"),
		          "Unable to load server module");

		ingen_try(bool(world->engine()), "Unable to create engine");
		world->engine()->listen();

		engine_interface = world->interface();
	}

	// If we don't have a local engine interface (for GUI), use network
	if (!engine_interface) {
		ingen_try(world->load_module("client"),
		          "Unable to load client module");
#ifdef HAVE_SOCKET
		Client::SocketClient::register_factories(world);
#endif
		const char* const uri = conf.option("connect").ptr<char>();
		ingen_try(Raul::URI::is_valid(uri),
		          (fmt("Invalid URI <%1%>") % uri).str().c_str());
		SPtr<Interface> client(new Client::ThreadedSigClientInterface(1024));
		engine_interface = world->new_interface(Raul::URI(uri), client);
		ingen_try(bool(engine_interface),
		          (fmt("Unable to create interface to `%1%'") % uri).str().c_str());
	}

	world->set_interface(engine_interface);

	// Load necessary modules before activating engine (and Jack driver)

	if (conf.option("load").is_valid() || !conf.files().empty()) {
		ingen_try(world->load_module("serialisation"),
		          "Unable to load serialisation module");
	}

	if (conf.option("gui").get<int32_t>()) {
		ingen_try(world->load_module("gui"),
		          "Unable to load GUI module");
	}

	// Activate the engine, if we have one
	if (world->engine()) {
		ingen_try(world->load_module("jack"),
		          "Unable to load jack module");
		world->engine()->activate();
	}

	// Load a graph
	if (conf.option("load").is_valid() || !conf.files().empty()) {
		boost::optional<Raul::Path>   parent;
		boost::optional<Raul::Symbol> symbol;

		const Atom& path_option = conf.option("path");
		if (path_option.is_valid()) {
			if (Raul::Path::is_valid(path_option.ptr<char>())) {
				const Raul::Path p(path_option.ptr<char>());
				if (!p.is_root()) {
					parent = p.parent();
					symbol = Raul::Symbol(p.symbol());
				}
			} else {
				cerr << "Invalid path given: '" << path_option.ptr<char>() << endl;
			}
		}

		ingen_try(bool(world->parser()), "Unable to create parser");

		const string path = (conf.option("load").is_valid()
		                     ? conf.option("load").ptr<char>()
		                     : conf.files().front());

		engine_interface->get(Raul::URI("ingen:/plugins"));
		engine_interface->get(Node::root_uri());
		world->parser()->parse_file(
			world, engine_interface.get(), path, parent, symbol);
	}

	// Set up signal handlers that will set quit_flag on interrupt
	signal(SIGINT, ingen_interrupt);
	signal(SIGTERM, ingen_interrupt);

	if (conf.option("gui").get<int32_t>()) {
		world->run_module("gui");
	} else if (conf.option("run").is_valid()) {
		// Run a script
#ifdef WITH_BINDINGS
		ingen_try(world->load_module("bindings"),
		          "Unable to load bindings module");

		world->run("application/x-python", conf.option("run").ptr<char>());
#else
		cerr << "This build of ingen does not support scripting." << endl;
#endif

	} else if (world->engine() && !conf.option("gui").get<int32_t>()) {
		// Run engine main loop until interrupt
		while (world->engine()->main_iteration()) {
			Glib::usleep(125000);  // 1/8 second
		}
	}

	// Sleep for a half second to allow event queues to drain
	Glib::usleep(500000);

	// Shut down
	if (world->engine())
		world->engine()->deactivate();

	engine_interface.reset();
	delete world;

	return 0;
}