/******************************************************************************
 * Icinga 2                                                                   *
 * Copyright (C) 2012 Icinga Development Team (http://www.icinga.org/)        *
 *                                                                            *
 * 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 St, Fifth Floor, Boston, MA 02110-1301, USA.             *
 ******************************************************************************/

#include <i2-icinga.h>


#ifndef _WIN32
#	include "icinga-version.h"
#	define ICINGA_VERSION VERSION ", " GIT_MESSAGE

#	include <ltdl.h>
#endif /* _WIN32 */

using namespace icinga;

/**
 * Entry point for the Icinga application.
 *
 * @params argc Number of command line arguments.
 * @params argv Command line arguments.
 * @returns The application's exit status.
 */
int main(int argc, char **argv)
{
#ifndef _WIN32
	LTDL_SET_PRELOADED_SYMBOLS();
#endif /* _WIN32 */

#ifndef _WIN32
	lt_dlinit();
#endif /* _WIN32 */

	/* This must be done before calling any other functions
	 * in the base library. */
	Application::SetMainThread();

	/* Install exception handlers to make debugging easier. */
	Application::InstallExceptionHandlers();

#ifdef ICINGA_PREFIX
	Application::SetPrefixDir(ICINGA_PREFIX);
#endif /* ICINGA_PREFIX */

#ifdef ICINGA_LOCALSTATEDIR
	Application::SetLocalStateDir(ICINGA_LOCALSTATEDIR);
#endif /* ICINGA_LOCALSTATEDIR */

#ifdef ICINGA_PKGLIBDIR
	Application::SetPkgLibDir(ICINGA_PKGLIBDIR);
#endif /* ICINGA_PKGLIBDIR */

#ifdef ICINGA_PKGDATADIR
	Application::SetPkgDataDir(ICINGA_PKGDATADIR);
#endif /* ICINGA_PKGDATADIR */

	Logger::Write(LogInformation, "icinga-app", "Icinga application loader"
#ifndef _WIN32
		" (version: " ICINGA_VERSION ")"
#endif /* _WIN32 */
	);

	if (argc < 3 || strcmp(argv[1], "-c") != 0) {
		stringstream msgbuf;
		msgbuf << "Syntax: " << argv[0] << " -c <config-file> ...";    
		Logger::Write(LogInformation, "icinga-app", msgbuf.str());
		return EXIT_FAILURE;
	}

	Component::AddSearchDir(Application::GetPkgLibDir());

	Utility::LoadIcingaLibrary("icinga", false);

	ConfigCompiler::AddIncludeSearchDir(Application::GetPkgDataDir());

	try {
		DynamicObject::BeginTx();

		/* load config file */
		String configFile = argv[2];
		vector<ConfigItem::Ptr> items;
		vector<ConfigType::Ptr> types;
		
		ConfigCompiler::CompileFile(configFile, &items, &types);

		Logger::Write(LogInformation, "icinga-app", "Registering config types...");
		
		BOOST_FOREACH(const ConfigType::Ptr& type, types) {
			type->Commit();
		}
		
		Logger::Write(LogInformation, "icinga-app", "Executing config items...");  

		BOOST_FOREACH(const ConfigItem::Ptr& item, items) {
			item->Commit();
		}

		Logger::Write(LogInformation, "icinga-app", "Validating config items...");
		
		DynamicType::Ptr type;
		BOOST_FOREACH(tie(tuples::ignore, type), DynamicType::GetTypes()) {
			ConfigType::Ptr ctype = ConfigType::GetByName(type->GetName());
			
			if (!ctype) {
				Logger::Write(LogWarning, "icinga-app", "No config type found for type '" + type->GetName() + "'");
				
				continue;
			}
			
			DynamicObject::Ptr object;
			BOOST_FOREACH(tie(tuples::ignore, object), type->GetObjects()) {
				ctype->ValidateObject(object);
			}
		}
		
		DynamicObject::FinishTx();
	} catch (const exception& ex) {
		Logger::Write(LogCritical, "icinga-app", "Configuration error: " + String(ex.what()));
		return EXIT_FAILURE;
	}

	Application::Ptr app = Application::GetInstance();

	if (!app)
		throw_exception(runtime_error("Configuration must create an Application object."));

	/* The application class doesn't need to know about the "-c configFile"
	 * command-line arguments. */
	return app->Run(argc - 2, &(argv[2]));
}