/*
 * ConfigKnobs.cpp
 *
 * This source file is part of the FoundationDB open source project
 *
 * Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "fdbclient/ConfigKnobs.h"
#include "fdbclient/Tuple.h"
#include "flow/UnitTest.h"

ConfigKey ConfigKeyRef::decodeKey(KeyRef const& key) {
	Tuple tuple;
	try {
		tuple = Tuple::unpack(key);
	} catch (Error& e) {
		TraceEvent(SevWarnAlways, "FailedToUnpackConfigKey").detail("Key", printable(key)).error(e);
		throw invalid_config_db_key();
	}
	if (tuple.size() != 2) {
		throw invalid_config_db_key();
	}
	if (tuple.getType(0) == Tuple::NULL_TYPE) {
		return ConfigKeyRef({}, tuple.getString(1));
	} else {
		if (tuple.getType(0) != Tuple::BYTES || tuple.getType(1) != Tuple::BYTES) {
			throw invalid_config_db_key();
		}
		return ConfigKeyRef(tuple.getString(0), tuple.getString(1));
	}
}

TEST_CASE("/fdbclient/ConfigDB/ConfigKey/EncodeDecode") {
	Tuple tuple;
	tuple << "class-A"_sr
	      << "test_long"_sr;
	auto packed = tuple.pack();
	auto unpacked = ConfigKeyRef::decodeKey(packed);
	ASSERT(unpacked.configClass.get() == "class-A"_sr);
	ASSERT(unpacked.knobName == "test_long"_sr);
	return Void();
}

namespace {

void decodeFailureTest(KeyRef key) {
	try {
		ConfigKeyRef::decodeKey(key);
	} catch (Error& e) {
		ASSERT_EQ(e.code(), error_code_invalid_config_db_key);
		return;
	}
	ASSERT(false);
}

} // namespace

TEST_CASE("/fdbclient/ConfigDB/ConfigKey/DecodeFailure") {
	{
		Tuple tuple;
		tuple << "s1"_sr
		      << "s2"_sr
		      << "s3"_sr;
		decodeFailureTest(tuple.pack());
	}
	{
		Tuple tuple;
		tuple << "s1"_sr << 5;
		decodeFailureTest(tuple.pack());
	}
	decodeFailureTest("non-tuple-key"_sr);
	return Void();
}