/*
 * ConflictSet.h
 *
 * 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.
 */

#ifndef CONFLICTSET_H
#define CONFLICTSET_H
#pragma once

#include <utility>
#include <vector>

#include "fdbclient/CommitTransaction.h"

struct ConflictSet;
ConflictSet* newConflictSet();
void clearConflictSet( ConflictSet*, Version );
void destroyConflictSet(ConflictSet*);

struct ConflictBatch {
	explicit ConflictBatch( ConflictSet*,  std::map< int, Standalone<VectorRef<KeyRangeRef>>>* conflictingKeyRangeMap = nullptr);
	~ConflictBatch();

	enum TransactionCommitResult {
		TransactionConflict = 0,
		TransactionTooOld,
		TransactionCommitted,
	};

	void addTransaction( const CommitTransactionRef& transaction );
	void detectConflicts(Version now, Version newOldestVersion, std::vector<int>& nonConflicting, std::vector<int>* tooOldTransactions = NULL);
	void GetTooOldTransactions(std::vector<int>& tooOldTransactions);

private:
	ConflictSet* cs;
	Standalone< VectorRef< struct TransactionInfo* > > transactionInfo;
	std::vector<struct KeyInfo> points;
	int transactionCount;
	std::vector< std::pair<StringRef,StringRef> > combinedWriteConflictRanges;
	std::vector< struct ReadConflictRange > combinedReadConflictRanges;
	bool* transactionConflictStatus;
	std::map< int, Standalone< VectorRef< KeyRangeRef > > >* conflictingKeyRangeMap;

	void checkIntraBatchConflicts();
	void combineWriteConflictRanges();
	void checkReadConflictRanges();
	void mergeWriteConflictRanges(Version now);
	void addConflictRanges(Version now, std::vector< std::pair<StringRef,StringRef> >::iterator begin, std::vector< std::pair<StringRef,StringRef> >::iterator end, class SkipList* part);
};

#endif