/******************************************************************************
 * Icinga 2                                                                   *
 * Copyright (C) 2012-2015 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 "icinga/command.hpp"
#include "icinga/macroprocessor.hpp"
#include "base/function.hpp"
#include "base/exception.hpp"
#include "base/objectlock.hpp"
#include <boost/foreach.hpp>

using namespace icinga;

REGISTER_TYPE(Command);
REGISTER_SCRIPTFUNCTION(ValidateCommandAttributes, &Command::ValidateAttributes);
REGISTER_SCRIPTFUNCTION(ValidateCommandArguments, &Command::ValidateArguments);
REGISTER_SCRIPTFUNCTION(ValidateEnvironmentVariables, &Command::ValidateEnvironmentVariables);

int Command::GetModifiedAttributes(void) const
{
	int attrs = 0;

	if (GetOverrideVars())
		attrs |= ModAttrCustomVariable;

	return attrs;
}

void Command::SetModifiedAttributes(int flags, const MessageOrigin& origin)
{
	if ((flags & ModAttrCustomVariable) == 0) {
		SetOverrideVars(Empty);
		OnVarsChanged(this, GetVars(), origin);
	}
}

void Command::ValidateAttributes(const String& location, const Command::Ptr& object)
{
	if (object->GetArguments() != Empty && !object->GetCommandLine().IsObjectType<Array>()) {
		BOOST_THROW_EXCEPTION(ScriptError("Validation failed for " +
		    location + ": Attribute 'command' must be an array if the 'arguments' attribute is set.", object->GetDebugInfo()));
	}
}

void Command::ValidateArguments(const String& location, const Command::Ptr& object)
{
	Dictionary::Ptr arguments = object->GetArguments();

	if (!arguments)
		return;

	ObjectLock olock(arguments);
	BOOST_FOREACH(const Dictionary::Pair& kv, arguments) {
		const Value& arginfo = kv.second;
		Value argval;

		if (arginfo.IsObjectType<Dictionary>()) {
			Dictionary::Ptr argdict = arginfo;

			if (argdict->Contains("value")) {
				String argvalue = argdict->Get("value");

				if (!MacroProcessor::ValidateMacroString(argvalue)) {
					BOOST_THROW_EXCEPTION(ScriptError("Validation failed for " +
					    location + ": Closing $ not found in macro format string '" + argvalue + "'.", object->GetDebugInfo()));
				}
			}

			if (argdict->Contains("set_if")) {
				String argsetif = argdict->Get("set_if");

				if (!MacroProcessor::ValidateMacroString(argsetif)) {
					BOOST_THROW_EXCEPTION(ScriptError("Validation failed for " +
					    location + ": Closing $ not found in macro format string '" + argsetif + "'.", object->GetDebugInfo()));
				}
			}
		} else if (arginfo.IsObjectType<Function>()) {
			continue; /* we cannot evaluate macros in functions */
		} else {
			argval = arginfo;

			if (argval.IsEmpty())
				continue;

			String argstr = argval;

			if (!MacroProcessor::ValidateMacroString(argstr)) {
				BOOST_THROW_EXCEPTION(ScriptError("Validation failed for " +
				    location + ": Closing $ not found in macro format string '" + argstr + "'.", object->GetDebugInfo()));
			}
		}
	}
}

void Command::ValidateEnvironmentVariables(const String& location, const Command::Ptr& object)
{
	Dictionary::Ptr env = object->GetEnv();

	if (!env)
		return;

	ObjectLock olock(env);
	BOOST_FOREACH(const Dictionary::Pair& kv, env) {
		const Value& envval = kv.second;

		if (!envval.IsString() || envval.IsEmpty())
			continue;

		if (!MacroProcessor::ValidateMacroString(envval)) {
			BOOST_THROW_EXCEPTION(ScriptError("Validation failed for " +
			    location + ": Closing $ not found in macro format string '" + envval + "'.", object->GetDebugInfo()));
		}
	}
}