/******************************************************************************
 * Icinga 2                                                                   *
 * Copyright (C) 2012-2014 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 "methods/pluginchecktask.h"
#include "icinga/pluginutility.h"
#include "icinga/checkcommand.h"
#include "icinga/macroprocessor.h"
#include "icinga/icingaapplication.h"
#include "base/dynamictype.h"
#include "base/logger_fwd.h"
#include "base/scriptfunction.h"
#include "base/utility.h"
#include "base/process.h"
#include <boost/algorithm/string/classification.hpp>
#include <boost/algorithm/string/split.hpp>
#include <boost/foreach.hpp>

using namespace icinga;

REGISTER_SCRIPTFUNCTION(PluginCheck,  &PluginCheckTask::ScriptFunc);

void PluginCheckTask::ScriptFunc(const Checkable::Ptr& checkable, const CheckResult::Ptr& cr)
{
	CheckCommand::Ptr commandObj = checkable->GetCheckCommand();
	Value raw_command = commandObj->GetCommandLine();

	Host::Ptr host;
	Service::Ptr service;
	tie(host, service) = GetHostService(checkable);

	MacroProcessor::ResolverList resolvers;
	if (service)
		resolvers.push_back(std::make_pair("service", service));
	resolvers.push_back(std::make_pair("host", host));
	resolvers.push_back(std::make_pair("command", commandObj));
	resolvers.push_back(std::make_pair("icinga", IcingaApplication::GetInstance()));

	Value command = MacroProcessor::ResolveMacros(raw_command, resolvers, checkable->GetLastCheckResult(), Utility::EscapeShellArg);

	Dictionary::Ptr envMacros = make_shared<Dictionary>();

	Dictionary::Ptr env = commandObj->GetEnv();

	if (env) {
		ObjectLock olock(env);
		BOOST_FOREACH(const Dictionary::Pair& kv, env) {
			String name = kv.second;

			Value value = MacroProcessor::ResolveMacros(name, resolvers, checkable->GetLastCheckResult());

			envMacros->Set(kv.first, value);
		}
	}

	cr->SetCommand(command);

	Process::Ptr process = make_shared<Process>(Process::PrepareCommand(command), envMacros);

	process->SetTimeout(commandObj->GetTimeout());

	process->Run(boost::bind(&PluginCheckTask::ProcessFinishedHandler, checkable, cr, _1));

}

void PluginCheckTask::ProcessFinishedHandler(const Checkable::Ptr& checkable, const CheckResult::Ptr& cr, const ProcessResult& pr)
{
	String output = pr.Output;
	output.Trim();
	std::pair<String, Value> co = PluginUtility::ParseCheckOutput(output);
	cr->SetOutput(co.first);
	cr->SetPerformanceData(co.second);
	cr->SetState(PluginUtility::ExitStatusToState(pr.ExitStatus));
	cr->SetExitStatus(pr.ExitStatus);
	cr->SetExecutionStart(pr.ExecutionStart);
	cr->SetExecutionEnd(pr.ExecutionEnd);

	checkable->ProcessCheckResult(cr);
}