#pragma once

#include "base.h"

namespace LMDBAL {
class iStorage;

class Transaction {
    friend class Base;
    friend class iStorage;
public:
    explicit Transaction();
    explicit Transaction(Transaction&& other);
    Transaction(const Transaction& other) = delete;
    Transaction& operator = (const Transaction& other) = delete;
    Transaction& operator = (Transaction&& other);
    virtual ~Transaction();

    void terminate();
    bool isActive() const;

protected:
    Transaction(TransactionID txn, const Base* parent);

protected:
    TransactionID txn;          /**<\brief Transaction inner handler*/
    bool active;                /**<\brief Transaction state*/
    const Base* parent;         /**<\brief Pointer to the database this transaction belongs to*/
};

class WriteTransaction : public Transaction {
    friend class Base;
public:
    explicit WriteTransaction();
    explicit WriteTransaction(WriteTransaction&& other);
    WriteTransaction(const WriteTransaction& other) = delete;
    WriteTransaction& operator = (const WriteTransaction& other) = delete;

    void commit();
    void abort();

protected:
    WriteTransaction(TransactionID txn, Base* parent);
};

}