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


using Newtonsoft.Json;
using Amazon.DynamoDBv2;
using Amazon.DynamoDBv2.Model;
using Amazon.DynamoDBv2.DocumentModel;
using Amazon.Runtime;


using ServerCore; using ServerBase;
using ServerCommon;
using ServerCommon.BusinessLogDomain;


using SESSION_ID = System.Int32;
using WORLD_META_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 GameServer
{
    public class DBQCustomDefinedUiReadAll : QueryExecutorBase
    {
        private readonly OwnerEntityType m_owner_entity_type;

        private Dictionary<string, EntityBase> m_owner_entities = new();

        private readonly List<CustomDefinedUiDoc> m_to_read_custom_defined_ui_docs = new();

        public DBQCustomDefinedUiReadAll(OwnerEntityType ownerEntityType)
            : base(typeof(DBQCustomDefinedUiReadAll).Name)
        {
            m_owner_entity_type = ownerEntityType;
        }

        //=====================================================================================
        // DB 쿼리 직전에 준비해야 할 로직들을 작성한다.
        //=====================================================================================
        public override async Task<Result> onPrepareQuery()
        {
            await Task.CompletedTask;

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

            var owner = getOwner();

            if (false == owner.isValidOwnerEntityType())
            {
                err_msg = $"Invalid OwnerEntityType Invalid !!! - {owner.toBasicString()}";
                result.setFail(ServerErrorCode.OwnerEntityTypeInvalid, err_msg);
                Log.getLogger().error(err_msg);

                return result;
            }

            return result;
        }

        //=====================================================================================
        // onPrepareQuery()를 성공할 경우 호출된다.
        //=====================================================================================
        public override async Task<Result> onQuery()
        {
            await Task.CompletedTask;

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

            var owner = getOwner();

            var player_action = owner.getEntityAction<PlayerAction>();
            NullReferenceCheckHelper.throwIfNull(player_action, () => $"player_action is null !!! - {owner.toBasicString()}");

            // owner 엔티티 목록을 얻어온다.
            result = player_action.fillupOwnerEntities(m_owner_entity_type, ref m_owner_entities);
            if (result.isFail())
            {
                return result;
            }

            var query_batch = getQueryBatch();
            NullReferenceCheckHelper.throwIfNull(query_batch, () => "query_batch is null !!!");

            var db_connector = query_batch.getDynamoDbConnector();

            foreach (var each in m_owner_entities)
            {
                var combination_key_for_pk = each.Key;  // owner guid
                var owner_entity = each.Value;          // owner entity

                (result, var make_primary_key) = await DynamoDBDocBaseHelper.makePrimaryKey<CustomDefinedUiDoc>(combination_key_for_pk);
                if (result.isFail())
                {
                    return result;
                }
                NullReferenceCheckHelper.throwIfNull(make_primary_key, () => $"make_primary_key is null !!! - {owner.toBasicString()}");

                var query_config = db_connector.makeQueryConfigForReadByPKOnly(make_primary_key.PK);

                (result, var read_docs) = await db_connector.simpleQueryDocTypesWithQueryOperationConfig<CustomDefinedUiDoc>(query_config, eventTid: query_batch.getTransId());
                if (result.isFail())
                {
                    return result;
                }

                var custom_defined_ui_action = owner_entity.getEntityAction<CustomDefinedUiAction>();
                NullReferenceCheckHelper.throwIfNull(custom_defined_ui_action, () => $"custom_defined_ui_action is null !!! : {owner_entity.toBasicString()} - {owner.toBasicString()}");

                foreach (var read_custom_defined_ui_doc in read_docs)
                {
                    result = await custom_defined_ui_action.tryLoadCustomDefinedUiFromDoc(read_custom_defined_ui_doc);
                    if (result.isFail())
                    {
                        return result;
                    }

                    m_to_read_custom_defined_ui_docs.Add(read_custom_defined_ui_doc);
                }
            }

            return result;
        }

        //=====================================================================================
        // DB 쿼리를 성공하고, doFnCommit()가 QueryResultType.NotCalledQueryFunc를 반환할 경우 호출된다.
        //=====================================================================================
        public override async Task onQueryResponseCommit()
        {
            await Task.CompletedTask;
            return;
        }

        //=====================================================================================
        // DB 쿼리를 실패하고, doFnRollback()가 QueryResultType.NotCalledQueryFunc를 반환할 경우 호출된다.
        //=====================================================================================
        public override async Task onQueryResponseRollback(Result errorResult)
        {
            await Task.CompletedTask;
            return;
        }

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

            return owner;
        }
    }
}