#ifndef OPENMW_MWWORLD_STORE_H
#define OPENMW_MWWORLD_STORE_H

#include <string>
#include <vector>
#include <map>
#include <stdexcept>

#include <components/esm/esmwriter.hpp>

#include "recordcmp.hpp"

namespace MWWorld
{
    struct StoreBase
    {
        virtual ~StoreBase() {}

        virtual void setUp() {}
        virtual void listIdentifier(std::vector<std::string> &list) const {}

        virtual size_t getSize() const = 0;
        virtual int getDynamicSize() const { return 0; }
        virtual void load(ESM::ESMReader &esm, const std::string &id) = 0;

        virtual bool eraseStatic(const std::string &id) {return false;}
        virtual void clearDynamic() {}

        virtual void write (ESM::ESMWriter& writer) const {}

        virtual void read (ESM::ESMReader& reader) {}
        ///< Read into dynamic storage
    };

    template <class T>
    class SharedIterator
    {
        typedef typename std::vector<T *>::const_iterator Iter;

        Iter mIter;

    public:
        SharedIterator() {}

        SharedIterator(const SharedIterator &orig)
          : mIter(orig.mIter)
        {}

        SharedIterator(const Iter &iter)
          : mIter(iter)
        {}

        SharedIterator &operator++() {
            ++mIter;
            return *this;
        }

        SharedIterator operator++(int) {
            SharedIterator iter = *this;
            ++mIter;

            return iter;
        }

        SharedIterator &operator--() {
            --mIter;
            return *this;
        }

        SharedIterator operator--(int) {
            SharedIterator iter = *this;
            --mIter;

            return iter;
        }

        bool operator==(const SharedIterator &x) const {
            return mIter == x.mIter;
        }

        bool operator!=(const SharedIterator &x) const {
            return !(*this == x);
        }

        const T &operator*() const {
            return **mIter;
        }

        const T *operator->() const {
            return &(**mIter);
        }
    };

    class ESMStore;

    template <class T>
    class Store : public StoreBase
    {
        std::map<std::string, T>      mStatic;
        std::vector<T *>    mShared;
        std::map<std::string, T> mDynamic;

        typedef std::map<std::string, T> Dynamic;
        typedef std::map<std::string, T> Static;

        class GetRecords {
            const std::string mFind;
            std::vector<const T*> *mRecords;

        public:
            GetRecords(const std::string &str, std::vector<const T*> *records)
              : mFind(Misc::StringUtils::lowerCase(str)), mRecords(records)
            { }

            void operator()(const T *item)
            {
                if(Misc::StringUtils::ciCompareLen(mFind, item->mId, mFind.size()) == 0)
                    mRecords->push_back(item);
            }
        };


        friend class ESMStore;

    public:
        Store()
        {}

        Store(const Store<T> &orig)
          : mStatic(orig.mData)
        {}

        typedef SharedIterator<T> iterator;

        // setUp needs to be called again after
        virtual void clearDynamic()
        {
            mDynamic.clear();
            mShared.clear();
        }

        const T *search(const std::string &id) const {
            T item;
            item.mId = Misc::StringUtils::lowerCase(id);

            typename std::map<std::string, T>::const_iterator it = mStatic.find(item.mId);

            if (it != mStatic.end() && Misc::StringUtils::ciEqual(it->second.mId, id)) {
                return &(it->second);
            }

            typename Dynamic::const_iterator dit = mDynamic.find(item.mId);
            if (dit != mDynamic.end()) {
                return &dit->second;
            }

            return 0;
        }

        /** Returns a random record that starts with the named ID, or NULL if not found. */
        const T *searchRandom(const std::string &id) const
        {
            std::vector<const T*> results;
            std::for_each(mShared.begin(), mShared.end(), GetRecords(id, &results));
            if(!results.empty())
                return results[int(std::rand()/((double)RAND_MAX+1)*results.size())];
            return NULL;
        }

        const T *find(const std::string &id) const {
            const T *ptr = search(id);
            if (ptr == 0) {
                std::ostringstream msg;
                msg << "Object '" << id << "' not found (const)";
                throw std::runtime_error(msg.str());
            }
            return ptr;
        }

        /** Returns a random record that starts with the named ID. An exception is thrown if none
         * are found. */
        const T *findRandom(const std::string &id) const
        {
            const T *ptr = searchRandom(id);
            if(ptr == 0)
            {
                std::ostringstream msg;
                msg << "Object starting with '"<<id<<"' not found (const)";
                throw std::runtime_error(msg.str());
            }
            return ptr;
        }

        void load(ESM::ESMReader &esm, const std::string &id) {
            std::string idLower = Misc::StringUtils::lowerCase(id);
            mStatic[idLower] = T();
            mStatic[idLower].mId = idLower;
            mStatic[idLower].load(esm);
        }

        void setUp() {
            //std::sort(mStatic.begin(), mStatic.end(), RecordCmp());

            mShared.clear();
            mShared.reserve(mStatic.size());
            typename std::map<std::string, T>::iterator it = mStatic.begin();
            for (; it != mStatic.end(); ++it) {
                mShared.push_back(&(it->second));
            }
        }

        iterator begin() const {
            return mShared.begin();
        }

        iterator end() const {
            return mShared.end();
        }

        size_t getSize() const {
            return mShared.size();
        }

        int getDynamicSize() const
        {
            return mDynamic.size();
        }

        void listIdentifier(std::vector<std::string> &list) const {
            list.reserve(list.size() + getSize());
            typename std::vector<T *>::const_iterator it = mShared.begin();
            for (; it != mShared.end(); ++it) {
                list.push_back((*it)->mId);
            }
        }

        T *insert(const T &item) {
            std::string id = Misc::StringUtils::lowerCase(item.mId);
            std::pair<typename Dynamic::iterator, bool> result =
                mDynamic.insert(std::pair<std::string, T>(id, item));
            T *ptr = &result.first->second;
            if (result.second) {
                mShared.push_back(ptr);
            } else {
                *ptr = item;
            }
            return ptr;
        }

        T *insertStatic(const T &item) {
            std::string id = Misc::StringUtils::lowerCase(item.mId);
            std::pair<typename Static::iterator, bool> result =
                mStatic.insert(std::pair<std::string, T>(id, item));
            T *ptr = &result.first->second;
            if (result.second) {
                mShared.push_back(ptr);
            } else {
                *ptr = item;
            }
            return ptr;
        }


        bool eraseStatic(const std::string &id) {
            T item;
            item.mId = Misc::StringUtils::lowerCase(id);

            typename std::map<std::string, T>::iterator it = mStatic.find(item.mId);

            if (it != mStatic.end() && Misc::StringUtils::ciEqual(it->second.mId, id)) {
                // delete from the static part of mShared
                typename std::vector<T *>::iterator sharedIter = mShared.begin();
                typename std::vector<T *>::iterator end = sharedIter + mStatic.size();

                while (sharedIter != mShared.end() && sharedIter != end) {
                    if((*sharedIter)->mId == item.mId) {
                        mShared.erase(sharedIter);
                        break;
                    }
                    ++sharedIter;
                }
                mStatic.erase(it);
            }

            return true;
        }

        bool erase(const std::string &id) {
            std::string key = Misc::StringUtils::lowerCase(id);
            typename Dynamic::iterator it = mDynamic.find(key);
            if (it == mDynamic.end()) {
                return false;
            }
            mDynamic.erase(it);

            // have to reinit the whole shared part
            mShared.erase(mShared.begin() + mStatic.size(), mShared.end());
            for (it = mDynamic.begin(); it != mDynamic.end(); ++it) {
                mShared.push_back(&it->second);
            }
            return true;
        }

        bool erase(const T &item) {
            return erase(item.mId);
        }

        void write (ESM::ESMWriter& writer) const
        {
            for (typename Dynamic::const_iterator iter (mDynamic.begin()); iter!=mDynamic.end();
                 ++iter)
            {
                writer.startRecord (T::sRecordId);
                writer.writeHNString ("NAME", iter->second.mId);
                iter->second.save (writer);
                writer.endRecord (T::sRecordId);
            }
        }

        void read (ESM::ESMReader& reader)
        {
            T record;
            record.mId = reader.getHNString ("NAME");
            record.load (reader);
            insert (record);
        }
    };

    template <>
    inline void Store<ESM::NPC>::clearDynamic()
    {
        std::map<std::string, ESM::NPC>::iterator iter = mDynamic.begin();

        while (iter!=mDynamic.end())
            if (iter->first=="player")
                ++iter;
            else
                mDynamic.erase (iter++);

        mShared.clear();
    }

    template <>
    inline void Store<ESM::Dialogue>::load(ESM::ESMReader &esm, const std::string &id) {
        std::string idLower = Misc::StringUtils::lowerCase(id);

        std::map<std::string, ESM::Dialogue>::iterator it = mStatic.find(idLower);
        if (it == mStatic.end()) {
            it = mStatic.insert( std::make_pair( idLower, ESM::Dialogue() ) ).first;
            it->second.mId = id; // don't smash case here, as this line is printed... I think
        }

        //I am not sure is it need to load the dialog from a plugin if it was already loaded from prevois plugins
        it->second.load(esm);
    }

    template <>
    inline void Store<ESM::Script>::load(ESM::ESMReader &esm, const std::string &id) {
        ESM::Script scpt;
        scpt.load(esm);
        Misc::StringUtils::toLower(scpt.mId);
        mStatic[scpt.mId] = scpt;
    }

    template <>
    inline void Store<ESM::StartScript>::load(ESM::ESMReader &esm, const std::string &id) {
        ESM::StartScript s;
        s.load(esm);
        s.mId = Misc::StringUtils::toLower(s.mScript);
        mStatic[s.mId] = s;
    }

    template <>
    class Store<ESM::LandTexture> : public StoreBase
    {
        // For multiple ESM/ESP files we need one list per file.
        typedef std::vector<ESM::LandTexture> LandTextureList;
        std::vector<LandTextureList> mStatic;

    public:
        Store<ESM::LandTexture>() {
            mStatic.push_back(LandTextureList());
            LandTextureList &ltexl = mStatic[0];
            // More than enough to hold Morrowind.esm. Extra lists for plugins will we
            //  added on-the-fly in a different method.
            ltexl.reserve(128);
        }

        typedef std::vector<ESM::LandTexture>::const_iterator iterator;

        const ESM::LandTexture *search(size_t index, size_t plugin) const {
            assert(plugin < mStatic.size());
            const LandTextureList &ltexl = mStatic[plugin];

            assert(index < ltexl.size());
            return &ltexl.at(index);
        }

        const ESM::LandTexture *find(size_t index, size_t plugin) const {
            const ESM::LandTexture *ptr = search(index, plugin);
            if (ptr == 0) {
                std::ostringstream msg;
                msg << "Land texture with index " << index << " not found";
                throw std::runtime_error(msg.str());
            }
            return ptr;
        }

        size_t getSize() const {
            return mStatic.size();
        }

        size_t getSize(size_t plugin) const {
            assert(plugin < mStatic.size());
            return mStatic[plugin].size();
        }

        void load(ESM::ESMReader &esm, const std::string &id, size_t plugin) {
            ESM::LandTexture lt;
            lt.load(esm);
            lt.mId = id;

            // Make sure we have room for the structure
            if (plugin >= mStatic.size()) {
                mStatic.resize(plugin+1);
            }
            LandTextureList &ltexl = mStatic[plugin];
            if(lt.mIndex + 1 > (int)ltexl.size())
                ltexl.resize(lt.mIndex+1);

            // Store it
            ltexl[lt.mIndex] = lt;
        }

        void load(ESM::ESMReader &esm, const std::string &id) {
            load(esm, id, esm.getIndex());
        }

        iterator begin(size_t plugin) const {
            assert(plugin < mStatic.size());
            return mStatic[plugin].begin();
        }

        iterator end(size_t plugin) const {
            assert(plugin < mStatic.size());
            return mStatic[plugin].end();
        }
    };

    template <>
    class Store<ESM::Land> : public StoreBase
    {
        std::vector<ESM::Land *> mStatic;

        struct Compare
        {
            bool operator()(const ESM::Land *x, const ESM::Land *y) {
                if (x->mX == y->mX) {
                    return x->mY < y->mY;
                }
                return x->mX < y->mX;
            }
        };

    public:
        typedef SharedIterator<ESM::Land> iterator;

        virtual ~Store<ESM::Land>()
        {
            for (std::vector<ESM::Land *>::const_iterator it =
                             mStatic.begin(); it != mStatic.end(); ++it)
            {
                delete *it;
            }

        }

        size_t getSize() const {
            return mStatic.size();
        }

        iterator begin() const {
            return iterator(mStatic.begin());
        }

        iterator end() const {
            return iterator(mStatic.end());
        }

        ESM::Land *search(int x, int y) const {
            ESM::Land land;
            land.mX = x, land.mY = y;

            std::vector<ESM::Land *>::const_iterator it =
                std::lower_bound(mStatic.begin(), mStatic.end(), &land, Compare());

            if (it != mStatic.end() && (*it)->mX == x && (*it)->mY == y) {
                return const_cast<ESM::Land *>(*it);
            }
            return 0;
        }

        ESM::Land *find(int x, int y) const{
            ESM::Land *ptr = search(x, y);
            if (ptr == 0) {
                std::ostringstream msg;
                msg << "Land at (" << x << ", " << y << ") not found";
                throw std::runtime_error(msg.str());
            }
            return ptr;
        }

        void load(ESM::ESMReader &esm, const std::string &id) {
            ESM::Land *ptr = new ESM::Land();
            ptr->load(esm);

            // Same area defined in multiple plugins? -> last plugin wins
            // Can't use search() because we aren't sorted yet - is there any other way to speed this up?
            for (std::vector<ESM::Land*>::iterator it = mStatic.begin(); it != mStatic.end(); ++it)
            {
                if ((*it)->mX == ptr->mX && (*it)->mY == ptr->mY)
                {
                    delete *it;
                    mStatic.erase(it);
                    break;
                }
            }

            mStatic.push_back(ptr);
        }

        void setUp() {
            std::sort(mStatic.begin(), mStatic.end(), Compare());
        }
    };

    template <>
    class Store<ESM::Cell> : public StoreBase
    {
        struct ExtCmp
        {
            bool operator()(const ESM::Cell &x, const ESM::Cell &y) {
                if (x.mData.mX == y.mData.mX) {
                    return x.mData.mY < y.mData.mY;
                }
                return x.mData.mX < y.mData.mX;
            }
        };

        struct DynamicExtCmp
        {
            bool operator()(const std::pair<int, int> &left, const std::pair<int, int> &right) const {
                if (left.first == right.first) {
                    return left.second < right.second;
                }
                return left.first < right.first;
            }
        };

        typedef std::map<std::string, ESM::Cell>                           DynamicInt;
        typedef std::map<std::pair<int, int>, ESM::Cell, DynamicExtCmp>    DynamicExt;

        DynamicInt      mInt;
        DynamicExt      mExt;

        std::vector<ESM::Cell *>    mSharedInt;
        std::vector<ESM::Cell *>    mSharedExt;

        DynamicInt mDynamicInt;
        DynamicExt mDynamicExt;

        const ESM::Cell *search(const ESM::Cell &cell) const {
            if (cell.isExterior()) {
                return search(cell.getGridX(), cell.getGridY());
            }
            return search(cell.mName);
        }

    public:
        ESMStore *mEsmStore;

        typedef SharedIterator<ESM::Cell> iterator;

        Store<ESM::Cell>()
        {}

        const ESM::Cell *search(const std::string &id) const {
            ESM::Cell cell;
            cell.mName = Misc::StringUtils::lowerCase(id);

            std::map<std::string, ESM::Cell>::const_iterator it = mInt.find(cell.mName);

            if (it != mInt.end() && Misc::StringUtils::ciEqual(it->second.mName, id)) {
                return &(it->second);
            }

            DynamicInt::const_iterator dit = mDynamicInt.find(cell.mName);
            if (dit != mDynamicInt.end()) {
                return &dit->second;
            }

            return 0;
        }

        const ESM::Cell *search(int x, int y) const {
            ESM::Cell cell;
            cell.mData.mX = x, cell.mData.mY = y;

            std::pair<int, int> key(x, y);
            DynamicExt::const_iterator it = mExt.find(key);
            if (it != mExt.end()) {
                return &(it->second);
            }

            DynamicExt::const_iterator dit = mDynamicExt.find(key);
            if (dit != mDynamicExt.end()) {
                return &dit->second;
            }

            return 0;
        }

        const ESM::Cell *searchOrCreate(int x, int y) {
            ESM::Cell cell;
            cell.mData.mX = x, cell.mData.mY = y;

            std::pair<int, int> key(x, y);
            DynamicExt::const_iterator it = mExt.find(key);
            if (it != mExt.end()) {
                return &(it->second);
            }

            DynamicExt::const_iterator dit = mDynamicExt.find(key);
            if (dit != mDynamicExt.end()) {
                return &dit->second;
            }

            ESM::Cell *newCell = new ESM::Cell;
            newCell->mData.mX = x;
            newCell->mData.mY = y;
            mExt[std::make_pair(x, y)] = *newCell;
            delete newCell;

            return &mExt[std::make_pair(x, y)];
        }

        const ESM::Cell *find(const std::string &id) const {
            const ESM::Cell *ptr = search(id);
            if (ptr == 0) {
                std::ostringstream msg;
                msg << "Interior cell '" << id << "' not found";
                throw std::runtime_error(msg.str());
            }
            return ptr;
        }

        const ESM::Cell *find(int x, int y) const {
            const ESM::Cell *ptr = search(x, y);
            if (ptr == 0) {
                std::ostringstream msg;
                msg << "Exterior at (" << x << ", " << y << ") not found";
                throw std::runtime_error(msg.str());
            }
            return ptr;
        }

        void setUp() {
            //typedef std::vector<ESM::Cell>::iterator Iterator;
            typedef DynamicExt::iterator ExtIterator;
            typedef std::map<std::string, ESM::Cell>::iterator IntIterator;

            //std::sort(mInt.begin(), mInt.end(), RecordCmp());
            mSharedInt.reserve(mInt.size());
            for (IntIterator it = mInt.begin(); it != mInt.end(); ++it) {
                mSharedInt.push_back(&(it->second));
            }

            //std::sort(mExt.begin(), mExt.end(), ExtCmp());
            mSharedExt.reserve(mExt.size());
            for (ExtIterator it = mExt.begin(); it != mExt.end(); ++it) {
                mSharedExt.push_back(&(it->second));
            }
        }

        // HACK: Method implementation had to be moved to a separate cpp file, as we would otherwise get
        //  errors related to the compare operator used in std::find for ESM::MovedCellRefTracker::find.
        //  There some nasty three-way cyclic header dependency involved, which I could only fix by moving
        //  this method.
        void load(ESM::ESMReader &esm, const std::string &id);

        iterator intBegin() const {
            return iterator(mSharedInt.begin());
        }

        iterator intEnd() const {
            return iterator(mSharedInt.end());
        }

        iterator extBegin() const {
            return iterator(mSharedExt.begin());
        }

        iterator extEnd() const {
            return iterator(mSharedExt.end());
        }

        // Return the northernmost cell in the easternmost column.
        const ESM::Cell *searchExtByName(const std::string &id) const {
            ESM::Cell *cell = 0;
            std::vector<ESM::Cell *>::const_iterator it = mSharedExt.begin();
            for (; it != mSharedExt.end(); ++it) {
                if (Misc::StringUtils::ciEqual((*it)->mName, id)) {
                    if ( cell == 0 ||
                        ( (*it)->mData.mX > cell->mData.mX ) ||
                        ( (*it)->mData.mX == cell->mData.mX && (*it)->mData.mY > cell->mData.mY ) )
                    {
                        cell = *it;
                    }
                }
            }
            return cell;
        }

        // Return the northernmost cell in the easternmost column.
        const ESM::Cell *searchExtByRegion(const std::string &id) const {
            ESM::Cell *cell = 0;
            std::vector<ESM::Cell *>::const_iterator it = mSharedExt.begin();
            for (; it != mSharedExt.end(); ++it) {
                if (Misc::StringUtils::ciEqual((*it)->mRegion, id)) {
                    if ( cell == 0 ||
                        ( (*it)->mData.mX > cell->mData.mX ) ||
                        ( (*it)->mData.mX == cell->mData.mX && (*it)->mData.mY > cell->mData.mY ) )
                    {
                        cell = *it;
                    }
                }
            }
            return cell;
        }

        size_t getSize() const {
            return mSharedInt.size() + mSharedExt.size();
        }

        void listIdentifier(std::vector<std::string> &list) const {
            list.reserve(list.size() + mSharedInt.size());

            std::vector<ESM::Cell *>::const_iterator it = mSharedInt.begin();
            for (; it != mSharedInt.end(); ++it) {
                list.push_back((*it)->mName);
            }
        }

        ESM::Cell *insert(const ESM::Cell &cell) {
            if (search(cell) != 0) {
                std::ostringstream msg;
                msg << "Failed to create ";
                msg << ((cell.isExterior()) ? "exterior" : "interior");
                msg << " cell";

                throw std::runtime_error(msg.str());
            }
            ESM::Cell *ptr;
            if (cell.isExterior()) {
                std::pair<int, int> key(cell.getGridX(), cell.getGridY());

                // duplicate insertions are avoided by search(ESM::Cell &)
                std::pair<DynamicExt::iterator, bool> result =
                    mDynamicExt.insert(std::make_pair(key, cell));

                ptr = &result.first->second;
                mSharedExt.push_back(ptr);
            } else {
                std::string key = Misc::StringUtils::lowerCase(cell.mName);

                // duplicate insertions are avoided by search(ESM::Cell &)
                std::pair<DynamicInt::iterator, bool> result =
                    mDynamicInt.insert(std::make_pair(key, cell));

                ptr = &result.first->second;
                mSharedInt.push_back(ptr);
            }
            return ptr;
        }

        bool erase(const ESM::Cell &cell) {
            if (cell.isExterior()) {
                return erase(cell.getGridX(), cell.getGridY());
            }
            return erase(cell.mName);
        }

        bool erase(const std::string &id) {
            std::string key = Misc::StringUtils::lowerCase(id);
            DynamicInt::iterator it = mDynamicInt.find(key);

            if (it == mDynamicInt.end()) {
                return false;
            }
            mDynamicInt.erase(it);
            mSharedInt.erase(
                mSharedInt.begin() + mSharedInt.size(),
                mSharedInt.end()
            );

            for (it = mDynamicInt.begin(); it != mDynamicInt.end(); ++it) {
                mSharedInt.push_back(&it->second);
            }

            return true;
        }

        bool erase(int x, int y) {
            std::pair<int, int> key(x, y);
            DynamicExt::iterator it = mDynamicExt.find(key);

            if (it == mDynamicExt.end()) {
                return false;
            }
            mDynamicExt.erase(it);
            mSharedExt.erase(
                mSharedExt.begin() + mSharedExt.size(),
                mSharedExt.end()
            );

            for (it = mDynamicExt.begin(); it != mDynamicExt.end(); ++it) {
                mSharedExt.push_back(&it->second);
            }

            return true;
        }
    };

    template <>
    class Store<ESM::Pathgrid> : public StoreBase
    {
    public:
        typedef std::vector<ESM::Pathgrid>::const_iterator iterator;

    private:
        std::vector<ESM::Pathgrid>  mStatic;

        std::vector<ESM::Pathgrid>::iterator mIntBegin, mIntEnd, mExtBegin, mExtEnd;

        struct IntExtOrdering
        {
            bool operator()(const ESM::Pathgrid &x, const ESM::Pathgrid &y) const {
                // interior pathgrids precedes exterior ones (x < y)
                if ((x.mData.mX == 0 && x.mData.mY == 0) &&
                    (y.mData.mX != 0 || y.mData.mY != 0))
                {
                    return true;
                }
                return false;
            }
        };

        struct ExtCompare
        {
            bool operator()(const ESM::Pathgrid &x, const ESM::Pathgrid &y) const {
                if (x.mData.mX == y.mData.mX) {
                    return x.mData.mY < y.mData.mY;
                }
                return x.mData.mX < y.mData.mX;
            }
        };

    public:

        void load(ESM::ESMReader &esm, const std::string &id) {
            mStatic.push_back(ESM::Pathgrid());
            mStatic.back().load(esm);
        }

        size_t getSize() const {
            return mStatic.size();
        }

        void setUp() {
            IntExtOrdering cmp;
            std::sort(mStatic.begin(), mStatic.end(), cmp);

            ESM::Pathgrid pg;
            pg.mData.mX = pg.mData.mY = 1;
            mExtBegin =
                std::lower_bound(mStatic.begin(), mStatic.end(), pg, cmp);
            mExtEnd = mStatic.end();

            mIntBegin = mStatic.begin();
            mIntEnd = mExtBegin;

            std::sort(mIntBegin, mIntEnd, RecordCmp());
            std::sort(mExtBegin, mExtEnd, ExtCompare());
        }

        const ESM::Pathgrid *search(int x, int y) const {
            ESM::Pathgrid pg;
            pg.mData.mX = x;
            pg.mData.mY = y;

            iterator it =
                std::lower_bound(mExtBegin, mExtEnd, pg, ExtCompare());
            if (it != mExtEnd && it->mData.mX == x && it->mData.mY == y) {
                return &(*it);
            }
            return 0;
        }

        const ESM::Pathgrid *find(int x, int y) const {
            const ESM::Pathgrid *ptr = search(x, y);
            if (ptr == 0) {
                std::ostringstream msg;
                msg << "Pathgrid at (" << x << ", " << y << ") not found";
                throw std::runtime_error(msg.str());
            }
            return ptr;
        }

        const ESM::Pathgrid *search(const std::string &name) const {
            ESM::Pathgrid pg;
            pg.mCell = name;

            iterator it = std::lower_bound(mIntBegin, mIntEnd, pg, RecordCmp());
            if (it != mIntEnd && Misc::StringUtils::ciEqual(it->mCell, name)) {
                return &(*it);
            }
            return 0;
        }

        const ESM::Pathgrid *find(const std::string &name) const {
            const ESM::Pathgrid *ptr = search(name);
            if (ptr == 0) {
                std::ostringstream msg;
                msg << "Pathgrid in cell '" << name << "' not found";
                throw std::runtime_error(msg.str());
            }
            return ptr;
        }

        const ESM::Pathgrid *search(const ESM::Cell &cell) const {
            if (cell.mData.mFlags & ESM::Cell::Interior) {
                return search(cell.mName);
            }
            return search(cell.mData.mX, cell.mData.mY);
        }

        const ESM::Pathgrid *find(const ESM::Cell &cell) const {
            if (cell.mData.mFlags & ESM::Cell::Interior) {
                return find(cell.mName);
            }
            return find(cell.mData.mX, cell.mData.mY);
        }

        iterator begin() const {
            return mStatic.begin();
        }

        iterator end() const {
            return mStatic.end();
        }

        iterator interiorPathsBegin() const {
            return mIntBegin;
        }

        iterator interiorPathsEnd() const {
            return mIntEnd;
        }

        iterator exteriorPathsBegin() const {
            return mExtBegin;
        }

        iterator exteriorPathsEnd() const {
            return mExtEnd;
        }
    };

    template <class T>
    class IndexedStore
    {
        struct Compare
        {
            bool operator()(const T &x, const T &y) const {
                return x.mIndex < y.mIndex;
            }
        };
    protected:
        std::vector<T> mStatic;

    public:
        typedef typename std::vector<T>::const_iterator iterator;

        IndexedStore() {}

        IndexedStore(unsigned int size) {
            mStatic.reserve(size);
        }

        iterator begin() const {
            return mStatic.begin();
        }

        iterator end() const {
            return mStatic.end();
        }

        /// \todo refine loading order
        void load(ESM::ESMReader &esm) {
            mStatic.push_back(T());
            mStatic.back().load(esm);
        }

        int getSize() const {
            return mStatic.size();
        }

        void setUp() {
            /// \note This method sorts indexed values for further
            /// searches. Every loaded item is present in storage, but
            /// latest loaded shadows any previous while searching.
            /// If memory cost will be too high, it is possible to remove
            /// unused values.

            Compare cmp;

            std::stable_sort(mStatic.begin(), mStatic.end(), cmp);

            typename std::vector<T>::iterator first, next;
            next = first = mStatic.begin();

            while (first != mStatic.end() && ++next != mStatic.end()) {
                while (next != mStatic.end() && !cmp(*first, *next)) {
                    ++next;
                }
                if (first != --next) {
                    std::swap(*first, *next);
                }
                first = ++next;
            }
        }

        const T *search(int index) const {
            T item;
            item.mIndex = index;

            iterator it =
                std::lower_bound(mStatic.begin(), mStatic.end(), item, Compare());
            if (it != mStatic.end() && it->mIndex == index) {
                return &(*it);
            }
            return 0;
        }

        const T *find(int index) const {
            const T *ptr = search(index);
            if (ptr == 0) {
                std::ostringstream msg;
                msg << "Object with index " << index << " not found";
                throw std::runtime_error(msg.str());
            }
            return ptr;
        }
    };

    template <>
    struct Store<ESM::Skill> : public IndexedStore<ESM::Skill>
    {
        Store() {}
        Store(unsigned int size)
          : IndexedStore<ESM::Skill>(size)
        {}
    };

    template <>
    struct Store<ESM::MagicEffect> : public IndexedStore<ESM::MagicEffect>
    {
        Store() {}
        Store(unsigned int size)
          : IndexedStore<ESM::MagicEffect>(size)
        {}
    };

    template <>
    class Store<ESM::Attribute> : public IndexedStore<ESM::Attribute>
    {
        std::vector<ESM::Attribute> mStatic;

    public:
        typedef std::vector<ESM::Attribute>::const_iterator iterator;

        Store() {
            mStatic.reserve(ESM::Attribute::Length);
        }

        const ESM::Attribute *search(size_t index) const {
            if (index >= mStatic.size()) {
                return 0;
            }
            return &mStatic.at(index);
        }

        const ESM::Attribute *find(size_t index) const {
            const ESM::Attribute *ptr = search(index);
            if (ptr == 0) {
                std::ostringstream msg;
                msg << "Attribute with index " << index << " not found";
                throw std::runtime_error(msg.str());
            }
            return ptr;
        }

        void setUp() {
            for (int i = 0; i < ESM::Attribute::Length; ++i) {
                mStatic.push_back(
                    ESM::Attribute(
                        ESM::Attribute::sAttributeIds[i],
                        ESM::Attribute::sGmstAttributeIds[i],
                        ESM::Attribute::sGmstAttributeDescIds[i]
                    )
                );
            }
        }

        size_t getSize() const {
            return mStatic.size();
        }

        iterator begin() const {
            return mStatic.begin();
        }

        iterator end() const {
            return mStatic.end();
        }
    };

} //end namespace

#endif