using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.InteropServices;


using Newtonsoft.Json;


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;
using Amazon.S3.Model;


namespace ServerCommon
{
    public class ToolActionAttribute : EntityAttributeBase, ICopyEntityAttributeFromDoc, IMergeWithEntityAttribute
    {
        [JsonProperty]
        public ITEM_GUID ItemGuid { get; set; } = string.Empty;

        [JsonProperty]
        public META_ID ItemMetaId { get; set; } = 0;

        [JsonProperty]
        public Int32 Step { get; set; } = 0;

        [JsonProperty]
        public Int32 RandomState { get; set; } = 0;

        [JsonProperty]
        public Int64 ActionStartDateTime { get; set; } = 0;

        public ToolActionAttribute(EntityBase owner, EntityBase entityOfOwnerEntityType)
            : base(owner, entityOfOwnerEntityType)
        {
        }

        public override void onClear()
        {
            ItemGuid = string.Empty;
            ItemMetaId = 0;
            Step = 0;
            RandomState = 0;
            ActionStartDateTime = 0;

            getAttributeState().reset();
        }

        public override EntityAttributeBase onCloned()
        {
            var owner = getOwner();
            NullReferenceCheckHelper.throwIfNull(owner, () => $"owner is null !!!");
            var parent = getEntityOfOwnerEntityType();
            NullReferenceCheckHelper.throwIfNull(parent, () => $"parent is null !!!");

            var cloned = new ToolActionAttribute(owner, parent);
            cloned.ItemGuid = ItemGuid;
            cloned.ItemMetaId = ItemMetaId;
            cloned.Step = Step;
            cloned.RandomState = RandomState;
            cloned.ActionStartDateTime = ActionStartDateTime;

            return cloned;
        }

        public override IEntityAttributeTransactor onNewEntityAttributeTransactor()
        {
            var owner = getOwner();
            NullReferenceCheckHelper.throwIfNull(owner, () => $"owner is null !!!");

            return new ToolActionAttributeTransactor(owner);
        }

        public override async Task<(Result, DynamoDbDocBase?)> toDocBase(bool isForQuery = true)
        {
            var result = new Result();

            var owner = getOwner();
            NullReferenceCheckHelper.throwIfNull(owner, () => $"owner is null !!!");
            var root_parent = owner.getRootParent();
            NullReferenceCheckHelper.throwIfNull(root_parent, () => $"root_parent is null !!! - {owner.toBasicString()}");

            var user_attribute = root_parent.getEntityAttribute<UserAttribute>();
            NullReferenceCheckHelper.throwIfNull(user_attribute, () => $"user_attribute is null !!! - {root_parent.toBasicString()}");

            USER_GUID user_guid = user_attribute.UserGuid;

            //=====================================================================================
            // Attribute => try pending Doc
            //=====================================================================================
            var try_pending_doc = getTryPendingDocBase() as ToolActionDoc;
            if (null == try_pending_doc)
            {
                var to_copy_doc = new ToolActionDoc(OwnerEntityType.User, user_guid, ItemMetaId);

                var origin_doc = getOriginDocBase<ToolActionAttribute>();
                if (null != origin_doc)
                {
                    to_copy_doc.copyTimestampsFromOriginDocBase(origin_doc);
                }

                try_pending_doc = to_copy_doc;

                setTryPendingDocBase(try_pending_doc);
            }

            var to_copy_doc_tool_action_attrib = try_pending_doc.getAttrib<ToolActionAttrib>();
            NullReferenceCheckHelper.throwIfNull(to_copy_doc_tool_action_attrib, () => $"to_copy_doc_tool_action_attrib is null !!! - {root_parent.toBasicString()}");

            to_copy_doc_tool_action_attrib.ItemGuid = ItemGuid;
            to_copy_doc_tool_action_attrib.ItemMetaId = ItemMetaId;
            to_copy_doc_tool_action_attrib.Step = Step;
            to_copy_doc_tool_action_attrib.RandomState = RandomState;
            to_copy_doc_tool_action_attrib.ActionStartDateTime = ActionStartDateTime;

            if (false == isForQuery)
            {
                return (result, try_pending_doc);
            }

            //=====================================================================================
            // Doc QueryType 반영
            //=====================================================================================
            (result, var to_query_doc) = await applyDoc4Query(try_pending_doc);
            if (result.isFail())
            {
                return (result, null);
            }

            return (result, to_query_doc);
        }

        public Result onMerge(EntityAttributeBase otherEntityAttribute)
        {
            var owner = getOwner();
            NullReferenceCheckHelper.throwIfNull(owner, () => $"owner is null !!!");

            var result = new Result();
            var err_msg = string.Empty;

            if (null == otherEntityAttribute)
            {
                err_msg = $"Invalid Param !!!, otherEntityAttribute is null";
                result.setFail(ServerErrorCode.FunctionParamNull, err_msg);
                Log.getLogger().error(result.toBasicString());

                return result;
            }

            //=====================================================================================
            // OtherAttribute => Attribute
            //=====================================================================================
            var tool_action_attribute = otherEntityAttribute as ToolActionAttribute;
            if (null == tool_action_attribute)
            {
                err_msg = $"Failed to cast ToolActionAttribute !!!, tool_action_attribute is null";
                result.setFail(ServerErrorCode.ClassTypeCastIsNull, err_msg);
                Log.getLogger().error(result.toBasicString());

                return result; 
            }

            ItemGuid = tool_action_attribute.ItemGuid;
            ItemMetaId = tool_action_attribute.ItemMetaId;
            Step = tool_action_attribute.Step;
            RandomState = tool_action_attribute.RandomState;
            ActionStartDateTime = tool_action_attribute.ActionStartDateTime;

            //=====================================================================================
            // Attribute Try Pending Doc => Origin Doc
            //=====================================================================================
            var try_pending_doc = tool_action_attribute.getTryPendingDocBase() as ToolActionDoc;
            if (null != try_pending_doc)
            {
                tool_action_attribute.resetTryPendingDocBase();

                syncOriginDocBaseWithNewDoc<ToolActionAttribute>(try_pending_doc);
            }

            var origin_doc_base = getOriginDocBase<ToolActionAttribute>();
            if (null == origin_doc_base)
            {
                // DB 에 저장되어 있지 않는 경우 OriginDoc은 null 이다 !!!
                return result;
            }

            var tool_action_attrib = origin_doc_base.getAttrib<ToolActionAttrib>();
            NullReferenceCheckHelper.throwIfNull(tool_action_attrib, () => $"tool_action_attrib is null !!! - {owner.toBasicString()}");

            tool_action_attrib.ItemGuid = ItemGuid;
            tool_action_attrib.ItemMetaId = ItemMetaId;
            tool_action_attrib.Step = Step;
            tool_action_attrib.RandomState = RandomState;
            tool_action_attrib.ActionStartDateTime = ActionStartDateTime;

            return result;
        }

        public bool copyEntityAttributeFromDoc(DynamoDbDocBase? docBase)
        {
            var err_msg = string.Empty;

            var owner = getOwner();
            NullReferenceCheckHelper.throwIfNull(owner, () => $"owner is null !!!");
            var root_parent = owner.getRootParent();
            NullReferenceCheckHelper.throwIfNull(root_parent, () => $"root_parent is null !!! - {owner.toBasicString()}");

            var to_cast_string = typeof(ToolActionDoc).Name;

            var tool_action_doc_base = docBase as ToolActionDoc;
            if (null == tool_action_doc_base)
            {
                err_msg = $"Failed to copyEntityAttributeFromDoc() !!!, tool_action_doc_base is null :{to_cast_string}";
                Log.getLogger().error(err_msg);
                return false;
            }

            //=====================================================================================
            // New Doc => Origin Doc
            //=====================================================================================
            syncOriginDocBaseWithNewDoc<ToolActionAttribute>(tool_action_doc_base);

            //=====================================================================================
            // Doc => Attribute
            //=====================================================================================
            var tool_action_attrib = tool_action_doc_base.getAttrib<ToolActionAttrib>();
            NullReferenceCheckHelper.throwIfNull(tool_action_attrib, () => $"tool_action_attrib is null !!! - {root_parent.toBasicString()}");

            ItemGuid = tool_action_attrib.ItemGuid;
            ItemMetaId = tool_action_attrib.ItemMetaId;
            Step = tool_action_attrib.Step;
            RandomState = tool_action_attrib.RandomState;
            ActionStartDateTime = tool_action_attrib.ActionStartDateTime;

            return true;
        }
    }

    public class ToolActionAttributeTransactor : EntityAttributeTransactorBase<ToolActionAttribute>, ICopyEntityAttributeTransactorFromEntityAttribute
    {
        public ToolActionAttributeTransactor(EntityBase owner)
            : base(owner)
        {
        }

        public bool copyEntityAttributeTransactorFromEntityAttribute(EntityAttributeBase? entityAttributeBase)
        {
            var err_msg = string.Empty;

            var to_cast_string = typeof(ToolActionAttribute).Name;

            var copy_from_tool_action_attribute = entityAttributeBase as ToolActionAttribute;
            if (null == copy_from_tool_action_attribute)
            {
                err_msg = $"Failed to copyEntityAttributeTransactorFromEntityAttribute() !!!, copy_from_tool_action_attribute is null :{to_cast_string}";
                Log.getLogger().error(err_msg);
                return false;
            }

            var copy_to_tool_action_attribute = getClonedEntityAttribute() as ToolActionAttribute;
            if (null == copy_to_tool_action_attribute)
            {
                err_msg = $"Failed to copyEntityAttributeTransactorFromEntityAttribute() !!!, copy_to_tool_action_attribute is null :{to_cast_string}";
                Log.getLogger().error(err_msg);
                return false;
            }

            copy_to_tool_action_attribute.ItemGuid = copy_from_tool_action_attribute.ItemGuid;
            copy_to_tool_action_attribute.ItemMetaId = copy_from_tool_action_attribute.ItemMetaId;
            copy_to_tool_action_attribute.Step = copy_from_tool_action_attribute.Step;
            copy_to_tool_action_attribute.RandomState = copy_from_tool_action_attribute.RandomState;
            copy_to_tool_action_attribute.ActionStartDateTime = copy_from_tool_action_attribute.ActionStartDateTime;

            return true;
        }
    }
}