using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


using ServerCore; using ServerBase;


using SESSION_ID = System.Int32;
using WORLD_ID = System.UInt32;
using META_ID = System.UInt32;
using ENTITY_GUID = System.String;
using ACCOUNT_ID = System.String;
using OWNER_GUID = System.String;
using USER_GUID = System.String;
using CHARACTER_GUID = System.String;
using ITEM_GUID = System.String;



namespace ServerBase;

public abstract partial class EntityAttributeTransactorBase<TEntityAttribute> : IEntityAttributeTransactor
    where TEntityAttribute : EntityAttributeBase
{
    public enum TransactionState
    {
        None = 0,

        New,        // 생성
        Modify,     // 변경
        Remove,     // 제거

        Completed   // 처리 완료
    }

    private EntityBase m_owner;

    private TEntityAttribute? m_cloned_entity_attribute_nullable;

    private TransactionState m_transaction_state = TransactionState.None;

    private readonly EntityRecorder m_entity_recorder;

    private TEntityAttribute? m_origin_entity_attribute_nullable;


    public EntityAttributeTransactorBase(EntityBase owner)
    {
        m_owner = owner;
        m_entity_recorder = new EntityRecorder(owner);
    }

    public bool cloneFromOriginEntityAttribute(EntityAttributeBase fromOriginEntityAttribute)
    {
        m_cloned_entity_attribute_nullable = fromOriginEntityAttribute.onCloned() as TEntityAttribute;
        if(null == m_cloned_entity_attribute_nullable)
        {
            var err_msg = $"m_cloned_entity_attribute_nullable is null !!! : toCloneTarget:{typeof(TEntityAttribute).Name} != OriginEntityAttribute:{fromOriginEntityAttribute.getTypeName()} - {getOwner().toBasicString()}";
            Log.getLogger().error(err_msg);
            return false;
        }

        m_cloned_entity_attribute_nullable.setCloned();
        m_cloned_entity_attribute_nullable.bindEntityRecorder(m_entity_recorder);

        m_origin_entity_attribute_nullable = fromOriginEntityAttribute as TEntityAttribute;

        return true;
    }

    public bool isReadOnly()
    {
        NullReferenceCheckHelper.throwIfNull(m_cloned_entity_attribute_nullable, () => $"m_cloned_entity_attribute_nullable is null !!! - {getOwner().toBasicString()}");

        if(true == m_cloned_entity_attribute_nullable.getAttributeState().isEmptyFlags())
        {
            return true;
        }

        return false;
    }

    public async Task<(Result, DynamoDbDocBase?)> makeDocBase()
    {
        NullReferenceCheckHelper.throwIfNull(m_cloned_entity_attribute_nullable, () => $"m_cloned_entity_attribute_nullable is null !!! - {getOwner().toBasicString()}");

        (var result, var doc) = await m_cloned_entity_attribute_nullable.toDocBase();
        if(result.isFail())
        {
            return (result, null);
        }

        return (result, doc);
    }

    public virtual void onClear()
    {
        m_cloned_entity_attribute_nullable?.onClear();

        m_entity_recorder.reset();
    }

    public ENTITY_GUID getEntityGuid() => getOwner().getEntityGuid();

    public virtual string toBasicString()
    {
        return $"{this.getTypeName()}, {m_cloned_entity_attribute_nullable?.toBasicString()}, {getOwner().toBasicString()}";
    }
}