#ifndef OPENMW_MWWORLD_ESMSTORE_H
#define OPENMW_MWWORLD_ESMSTORE_H

#include <memory>
#include <stdexcept>
#include <unordered_map>

#include <components/esm/luascripts.hpp>
#include "store.hpp"

namespace Loading
{
    class Listener;
}

namespace MWMechanics
{
    class SpellList;
}

namespace ESM
{
    class ReadersCache;
}

namespace MWWorld
{
    struct ESMStoreImp;

    class ESMStore
    {
        friend struct ESMStoreImp; //This allows StoreImp to extend esmstore without beeing included everywhere

        static std::size_t &getTypeIndexCounter();

        template<typename T> 
        static std::size_t getTypeIndex()
        {
            static std::size_t index = getTypeIndexCounter()++;
            return index;
        }

        std::unique_ptr<ESMStoreImp> mStoreImp;

        std::unordered_map<std::string, int> mRefCount;

        std::vector<StoreBase*> mStores;
        std::vector<DynamicStore*> mDynamicStores;

        unsigned int mDynamicCount;

        mutable std::unordered_map<std::string, std::weak_ptr<MWMechanics::SpellList>, Misc::StringUtils::CiHash, Misc::StringUtils::CiEqual> mSpellListCache;

        template <class T>
        Store<T>& getWritable() {return static_cast<Store<T>&>(*mStores[getTypeIndex<T>()]);}

        /// Validate entries in store after setup
        void validate();

        void countAllCellRefs(ESM::ReadersCache& readers);

        template<class T>
        void removeMissingObjects(Store<T>& store);

        using LuaContent = std::variant<
            ESM::LuaScriptsCfg,  // data from an omwaddon
            std::string>;  // path to an omwscripts file
        std::vector<LuaContent> mLuaContent;

    public:
        void addOMWScripts(std::string filePath) { mLuaContent.push_back(std::move(filePath)); }
        ESM::LuaScriptsCfg getLuaScriptsCfg() const;

        /// \todo replace with SharedIterator<StoreBase>
        typedef std::vector<DynamicStore*>::const_iterator iterator;

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

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

        /// Look up the given ID in 'all'. Returns 0 if not found.
        int find(const std::string& id) const;

        int findStatic(const std::string& id) const;


        ESMStore();
        ~ESMStore();

        void clearDynamic();

        void movePlayerRecord();

        /// Validate entries in store after loading a save
        void validateDynamic();

        void load(ESM::ESMReader &esm, Loading::Listener* listener, ESM::Dialogue*& dialogue);

        template <class T>
        const Store<T>& get() const {return static_cast<const Store<T>&>(*mStores[getTypeIndex<T>()]);}

        /// Insert a custom record (i.e. with a generated ID that will not clash will pre-existing records)
        template <class T>
        const T* insert(const T& x);

        /// Insert a record with set ID, and allow it to override a pre-existing static record.
        template <class T>
        const T *overrideRecord(const T &x);

        template <class T>
        const T *insertStatic(const T &x);

        // This method must be called once, after loading all master/plugin files. This can only be done
        //  from the outside, so it must be public.
        void setUp();
        void validateRecords(ESM::ReadersCache& readers);

        int countSavedGameRecords() const;

        void write (ESM::ESMWriter& writer, Loading::Listener& progress) const;

        bool readRecord (ESM::ESMReader& reader, uint32_t type);
        ///< \return Known type?

        // To be called when we are done with dynamic record loading
        void checkPlayer();

        /// @return The number of instances defined in the base files. Excludes changes from the save file.
        int getRefCount(std::string_view id) const;

        /// Actors with the same ID share spells, abilities, etc.
        /// @return The shared spell list to use for this actor and whether or not it has already been initialized.
        std::pair<std::shared_ptr<MWMechanics::SpellList>, bool> getSpellList(const std::string& id) const;
    };
}

#endif