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 ServerCommon;


using META_ID = System.UInt32;


namespace GameServer
{
    public static class LandAuctionReservationHelper
    {
        //=========================================================================================
        // 예약된 랜드 경매 정보가 있는지 확인하고
        // 있다면 활성화중인 랜드 경매의 종료 상태를 확인하여
        // 종료 상태라면 LandAuctionActivityDoc.AuctionNumber를 예약된 정보로 변경 및 저장 한다.
        //=========================================================================================
        public static async Task<(Result, bool)> configureNextLandAuctionToDb(META_ID landMetaId)
        {
            var result = new Result();
            var err_msg = string.Empty;

            var server_logic = GameServerApp.getServerLogic();
            var db_connector = server_logic.getDynamoDbClient();

            var last_auction_number = 0;

            (result, var found_activity_doc) = await LandAuctionDbHelper.readLandAuctionActivityDocFromDb(landMetaId, false);
            if (result.isFail())
            {
                err_msg = $"Failed to readLandAuctionActivityDocFromDb() !!! : {result.toBasicString()} - landMetaId:{landMetaId}";
                Log.getLogger().error(err_msg);
                return (result, false);
            }
            if (null != found_activity_doc)
            {
                // 현재 활성화중인 랜드 경매 종료 상태를 체크 한다.
                var curr_activity_attrib = found_activity_doc.getAttrib<LandAuctionActivityAttrib>();
                NullReferenceCheckHelper.throwIfNull(curr_activity_attrib, () => $"curr_activity_attrib is null !!! - landMetaId:{landMetaId}");
                var activity_auction_number = curr_activity_attrib.AuctionNumber;
                ConditionValidCheckHelper.throwIfFalseWithCondition( () => 0 < activity_auction_number
                                                                   , () => $"Invalid AuctionNubmer !!! : 0 < activityAuctionNumber:{activity_auction_number}"
                                                                         + $" - landMetaId:{landMetaId}");
                last_auction_number = activity_auction_number;

                (result, var last_registry_doc) = await LandAuctionDbHelper.readLandAuctionRegistryDocFromDb(landMetaId, last_auction_number);
                if (result.isFail())
                {
                    err_msg = $"Failed to readLandAuctionRegistryDocFromDb() !!! : {result.toBasicString()} - landMetaId:{landMetaId}, lastAuctionNumber:{last_auction_number}";
                    Log.getLogger().error(err_msg);
                    return (result, false);
                }
                NullReferenceCheckHelper.throwIfNull(last_registry_doc, () => $"last_registry_doc is null !!! - landMetaId:{landMetaId}, lastAuctionNumber:{last_auction_number}");
                var last_registry_attrib = last_registry_doc.getAttrib<LandAuctionRegistryAttrib>();
                NullReferenceCheckHelper.throwIfNull(last_registry_attrib, () => $"last_registry_attrib is null !!! - landMetaId:{landMetaId}, lastAuctionNumber:{last_auction_number}");

                if(LandAuctionResult.None == last_registry_attrib.LandAuctionResult)
                {
                    if (true == LandAuctionManager.It.hasActivitingLandAuction(landMetaId))
                    {
                        // 아직 경매 처리 진행전 이다 !!!
                        return (result, false);
                    }
                    else
                    {
                        // 활성화 목록에 로딩을 해야 한다 !!!
                        return (result, true);
                    }
                }
            }

            // 다음 예약된 경매가 있는지 체크 한다.
            // 있다면 LandAuctionActivityDoc.AuctionNumber에 설정 한다. !!!
            var next_auction_number = last_auction_number + 1;
            (result, var found_registry_doc) = await LandAuctionDbHelper.readLandAuctionRegistryDocFromDb(landMetaId, next_auction_number, false);
            if (result.isFail())
            {
                err_msg = $"Failed to readLandAuctionRegistryDocFromDb() !!! : {result.toBasicString()} - landMetaId:{landMetaId}, auctionNumber:{next_auction_number}";
                Log.getLogger().error(err_msg);
                return (result, false);
            }
            if (null == found_registry_doc)
            {
                return (result, false);
            }
            var registry_attrib = found_registry_doc.getAttrib<LandAuctionRegistryAttrib>();
            NullReferenceCheckHelper.throwIfNull(registry_attrib, () => $"registry_attrib is null !!! - landMetaId:{landMetaId}, auctionNumber:{next_auction_number}");

            result = registry_attrib.checkValidLandAuctionRegistry();
            if (result.isFail())
            {
                return (result, false);
            }

            if (null == found_activity_doc)
            {
                var new_activity_doc = new LandAuctionActivityDoc(landMetaId);
                found_activity_doc = new_activity_doc;
            }

            var activity_attrib = found_activity_doc.getAttrib<LandAuctionActivityAttrib>();
            NullReferenceCheckHelper.throwIfNull(activity_attrib, () => $"activity_attrib is null !!! - landMetaId:{landMetaId}");

            if (next_auction_number <= activity_attrib.AuctionNumber)
            {
                // 이미 next_auction_number이상으로 설정 되었다면 갱신할 필요가 없다 !!!
                return (result, false);
            }

            activity_attrib.AuctionNumber = next_auction_number;

            result = await db_connector.simpleUpsertDocumentWithDocType(found_activity_doc);
            if (result.isFail())
            {
                err_msg = $"Failed to simpleInsertDocumentWithDocType<LandAuctionActivityDoc> !!! : {result.toBasicString()}, auctionNumber:{next_auction_number} - landMetaId:{landMetaId}";
                Log.getLogger().error(err_msg);
                return (result, false);
            }

            LandAuctionBusinessLogHelper.writeBusinessLogByLandAuctionActivity(found_activity_doc);

            err_msg = $"Configure Next LandAuctionKey !!!, nextAuctionNumber:{next_auction_number} - landMetaId:{landMetaId}";
            Log.getLogger().debug(err_msg);

            return (result, true);
        }

        public static async Task<(Result, Int32)> getNextLandAuctionNumber(META_ID landMetaId)
        {
            var result = new Result();
            var err_msg = string.Empty;

            var server_logic = GameServerApp.getServerLogic();
            var db_connector = server_logic.getDynamoDbClient();

            var last_auction_number = 0;

            (result, var found_activity_doc) = await LandAuctionDbHelper.readLandAuctionActivityDocFromDb(landMetaId, false);
            if (result.isFail())
            {
                err_msg = $"Failed to readLandAuctionActivityDocFromDb() !!! : {result.toBasicString()} - landMetaId:{landMetaId}";
                Log.getLogger().error(err_msg);
                return (result, 0);
            }
            if (null != found_activity_doc)
            {
                var activity_attrib = found_activity_doc.getAttrib<LandAuctionActivityAttrib>();
                NullReferenceCheckHelper.throwIfNull(activity_attrib, () => $"activity_attrib is null !!! - landMetaId:{landMetaId}");
                var activity_auction_number = activity_attrib.AuctionNumber;
                ConditionValidCheckHelper.throwIfFalseWithCondition( () => 0 < activity_auction_number
                                                                   , () => $"Invalid AuctionNubmer !!! : 0 < activityAuctionNumber:{activity_auction_number}"
                                                                         + $" - landMetaId:{landMetaId}" );
                last_auction_number = activity_auction_number;
            }

            var next_auction_number = 0;
            var is_continue = true;

            while (is_continue)
            {
                next_auction_number = last_auction_number + 1;

                (result, var found_registry_doc) = await LandAuctionDbHelper.readLandAuctionRegistryDocFromDb(landMetaId, next_auction_number, false);
                if (result.isFail())
                {
                    err_msg = $"Failed to readLandAuctionRegistryDocFromDb() !!! : {result.toBasicString()} - landMetaId:{landMetaId}, auctionNumber:{next_auction_number}";
                    Log.getLogger().error(err_msg);
                    return (result, 0);
                }

                if (null == found_registry_doc)
                {
                    is_continue = false;
                    break;
                }

                last_auction_number = next_auction_number;
            }

            return (result, next_auction_number);
        }
    }
}