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#pragma once

#include "message_ptr_and_header.h"
#include "moved.h"
#include "ybus.h"

#include <contrib/libs/sparsehash/src/sparsehash/dense_hash_map>

#include <util/generic/deque.h>
#include <util/generic/noncopyable.h> 
#include <util/generic/utility.h> 
 
namespace NBus {
    namespace NPrivate {
        typedef TVector<TBusMessage*> TMessagesPtrs;
 
        class TTimedMessages {
        public:
            TTimedMessages();
            ~TTimedMessages();

            struct TItem {
                THolder<TBusMessage> Message;
 
                void Swap(TItem& that) {
                    DoSwap(Message, that.Message);
                }
            };
 
            typedef TDeque<TMoved<TItem>> TItems;
 
            void PushBack(TNonDestroyingAutoPtr<TBusMessage> m);
            TNonDestroyingAutoPtr<TBusMessage> PopFront();
            bool Empty() const;
            size_t Size() const;
 
            void Timeout(TInstant before, TMessagesPtrs* r);
            void Clear(TMessagesPtrs* r);

        private:
            TItems Items;
        };

        class TSyncAckMessages : TNonCopyable {
        public:
            TSyncAckMessages();
            ~TSyncAckMessages();

            void Push(TBusMessagePtrAndHeader& m);
            TBusMessage* Pop(TBusKey id);
 
            void Timeout(TInstant before, TMessagesPtrs* r);
 
            void Clear(TMessagesPtrs* r);

            size_t Size() const {
                return KeyToMessage.size();
            }

            void RemoveAll(const TMessagesPtrs&);

            void Gc();

            void DumpState();
 
        private:
            struct TTimedItem {
                TBusKey Key;
                TBusInstant SendTime;
            };
 
            typedef TDeque<TTimedItem> TTimedItems;
            typedef TDeque<TTimedItem>::iterator TTimedIterator;
 
            TTimedItems TimedItems;
 
            struct TValue {
                TBusMessage* Message;
            };
 
            // keys are already random, no need to hash them further
            struct TIdHash {
                size_t operator()(TBusKey value) const {
                    return value;
                }
            };
 
            typedef google::dense_hash_map<TBusKey, TValue, TIdHash> TKeyToMessage;
 
            TKeyToMessage KeyToMessage;
        }; 
 
    }
}