using System;
using Svelto.Common;
using Svelto.DataStructures;

namespace Svelto.ECS.Internal
{
    public interface ITypeSafeDictionary<TValue> : ITypeSafeDictionary where TValue : IEntityComponent
    {
        void Add(uint egidEntityId, in TValue entityComponent);
        ref TValue this[uint idEntityId] { get; }
        bool TryGetValue(uint entityId, out TValue item);
        ref TValue GetOrCreate(uint idEntityId);

        IBuffer<TValue> GetValues(out uint count);
        ref TValue GetDirectValueByRef(uint key);
    }

    public interface ITypeSafeDictionary:IDisposable
    {
        uint                count { get; }
        ITypeSafeDictionary Create();

        //todo: there is something wrong in the design of the execute callback methods. Something to cleanup
        void ExecuteEnginesAddOrSwapCallbacks(FasterDictionary<RefWrapperType, FasterList<ReactEngineContainer>> entityComponentEnginesDb,
            ITypeSafeDictionary realDic, ExclusiveGroupStruct? fromGroup, ExclusiveGroupStruct toGroup, in PlatformProfiler profiler);
        void ExecuteEnginesSwapOrRemoveCallbacks(EGID fromEntityGid, EGID? toEntityID, ITypeSafeDictionary toGroup,
                                                 FasterDictionary<RefWrapperType, FasterList<ReactEngineContainer>> engines, in PlatformProfiler profiler);
        void ExecuteEnginesRemoveCallbacks(FasterDictionary<RefWrapperType, FasterList<ReactEngineContainer>> entityComponentEnginesDB,
            in PlatformProfiler profiler, ExclusiveGroupStruct @group);
        
        void AddEntitiesFromDictionary
            (ITypeSafeDictionary entitiesToSubmit, ExclusiveGroupStruct groupId, EnginesRoot enginesRoot);
        
        void AddEntityToDictionary(EGID fromEntityGid, EGID toEntityID, ITypeSafeDictionary toGroup);
        void RemoveEntityFromDictionary(EGID fromEntityGid);

        void ResizeTo(uint size);
        void Trim();
        void Clear();
        void FastClear();
        bool Has(uint key);
        bool ContainsKey(uint egidEntityId);
        uint GetIndex(uint valueEntityId);
        bool TryFindIndex(uint entityGidEntityId, out uint index);

        void KeysEvaluator(System.Action<uint> action);
    }
}