using Google.Protobuf.WellKnownTypes;

using ServerCore; using ServerBase;
using ServerCommon;
using USER_GUID = System.String;
using USER_NICKNAME = System.String;
using MetaAssets;



namespace GameServer
{
    public class Mail : EntityBase
    {
        private Mail(EntityBase parent)
            : base(EntityType.Mail, parent)
        {
        }

        public override async Task<Result> onInit()
        {
            var parent = getDirectParent();
            NullReferenceCheckHelper.throwIfNull(parent, () => "Parent Entity is null !!");

            addEntityAttribute(new MailAttribute(this, parent));

            return await base.onInit();
        }

        public static async Task<(Result, Mail?)> createSendMail(Player owner, string toNickname, string toGuid, string title, string mailText)
        {
            var mail = new Mail(owner);
            var result = await mail.onInit();
            if (result.isFail())
            {
                return (result, null);
            }

            var err_msg = string.Empty;
            DateTime now = DateTimeHelper.Current;
            var expireDate = now.AddSeconds(MetaHelper.GameConfigMeta.SendMailStoragePeriod);
            string mailGuid = MailHelper.makeMailGuid(now);

            var mail_attribute = mail.getEntityAttribute<MailAttribute>();
            if (mail_attribute == null)
            {
                err_msg = $"Failed to get mail attribute : {nameof(MailAttribute)}";
                result.setFail(ServerErrorCode.EntityAttributeIsNull, err_msg);
                Log.getLogger().error(err_msg);
                return (result, null);
            }

            mail_attribute.MailGuid = mailGuid;
            mail_attribute.SenderNickName = owner.getUserNickname();
            mail_attribute.SenderGuid = owner.getUserGuid();
            mail_attribute.ReceiverNickName = toNickname;
            mail_attribute.ReceiverGuid = toGuid;
            mail_attribute.Title = title;
            mail_attribute.Text = mailText;
            mail_attribute.CreateTime = now;
            mail_attribute.ExpireTime = expireDate;
            mail_attribute.IsSystemMail = false;
            mail_attribute.IsRead = false;
            mail_attribute.IsGetItem = false;
            mail_attribute.IsTextByMetaData = false;

            mail_attribute.newEntityAttribute();

            return (result, mail);
        }

        public static async Task<(Result, Mail?)> createMailFromDoc(EntityBase parent, MailDoc doc)
        {
            var mail = new Mail(parent);
            var result = await mail.onInit();
            if (result.isFail())
            {
                return (result, null);
            }

            var err_msg = string.Empty;

            var mail_attribute = mail.getEntityAttribute<MailAttribute>();
            NullReferenceCheckHelper.throwIfNull(mail_attribute, () => $"mail_attribute is null !!! - {parent.toBasicString()}");

            if (mail_attribute.copyEntityAttributeFromDoc(doc) == false)
            {
                err_msg = $"Failed to copyEntityAttributeFromDoc !!! : doc_type {doc.GetType()} - {mail.getRootParent().toBasicString()}";
                result.setFail(ServerErrorCode.DynamoDbDocCopyToEntityAttributeFailed, err_msg);
                Log.getLogger().error(err_msg);
                return (result, null);
            }

            return (result, mail);
        }

        public static async Task<(Result, ReceivedMailDoc?)> createSystemMailWithMeta( USER_GUID receiverUserGuid, USER_NICKNAME receiverNickname
                                                                                     , SystemMailMetaData systemMailData
                                                                                     , List<ServerCommon.MailItem> mailItems, DateTime expireDate, string packageOrderId = "")
        {
            ArgumentNullReferenceCheckHelper.throwIfNull(systemMailData, () => $"systemMailData is null !!! - receiver:{receiverNickname}");
            ArgumentNullReferenceCheckHelper.throwIfNull(mailItems, () => $"mailItems is null !!! - receiver:{receiverNickname}, sender:{systemMailData.Sender}");

            (var result, ReceivedMailDoc? to_receive_mail_doc) = await Mail.createSystemMail( receiverUserGuid, receiverNickname
                                                                                            , systemMailData.Sender
                                                                                            , systemMailData.Mail_Title, systemMailData.Mail_Desc, new List<string>()
                                                                                            , true, mailItems, expireDate, packageOrderId);
            if (result.isFail())
            {
                return (result, null);
            }

            return (result, to_receive_mail_doc);
        }

        public static async Task<(Result, ReceivedMailDoc?)> createSystemMailWithMeta( USER_GUID receiverUserGuid, USER_NICKNAME receiverNickname
                                                                                     , SystemMailMetaData systemMailData, List<string> contensArguments
                                                                                     , List<ServerCommon.MailItem> mailItems, DateTime expireDate, string packageOrderId = "")
        {
            ArgumentNullReferenceCheckHelper.throwIfNull(systemMailData, () => $"systemMailData is null !!! - receiver:{receiverNickname}");
            ArgumentNullReferenceCheckHelper.throwIfNull(mailItems, () => $"mailItems is null !!! - receiver:{receiverNickname}, sender:{systemMailData.Sender}");

            (var result, ReceivedMailDoc? to_receive_mail_doc) = await Mail.createSystemMail( receiverUserGuid, receiverNickname
                                                                                            , systemMailData.Sender
                                                                                            , systemMailData.Mail_Title, systemMailData.Mail_Desc, contensArguments
                                                                                            , true, mailItems, expireDate, packageOrderId);
            if (result.isFail())
            {
                return (result, null);
            }

            return (result, to_receive_mail_doc);
        }

        public static async Task<(Result, ReceivedMailDoc?)> createSystemMailWithMeta( USER_GUID receiverUserGuid, USER_NICKNAME receiverNickname
                                                                                     , SystemMailMetaData systemMailData
                                                                                     , List<ServerCommon.MailItem> mailItems, Int64 TTL_Period, string packageOrderId = "")
        {
            ArgumentNullReferenceCheckHelper.throwIfNull(systemMailData, () => $"systemMailData is null !!! - receiver:{receiverNickname}");
            ArgumentNullReferenceCheckHelper.throwIfNull(mailItems, () => $"mailItems is null !!! - receiver:{receiverNickname}, sender:{systemMailData.Sender}");

            (var result, ReceivedMailDoc? to_receive_mail_doc) = await Mail.createSystemMail(receiverUserGuid, receiverNickname
                                                                                            , systemMailData.Sender
                                                                                            , systemMailData.Mail_Title, systemMailData.Mail_Desc, new List<string>()
                                                                                            , true, mailItems, TTL_Period, packageOrderId);
            if (result.isFail())
            {
                return (result, null);
            }

            return (result, to_receive_mail_doc);
        }

        public static async Task<(Result, ReceivedMailDoc?)> createSystemMailWithMeta( USER_GUID receiverUserGuid, USER_NICKNAME receiverNickname
                                                                                     , SystemMailMetaData systemMailData, List<string> contentsArguments
                                                                                     , List<ServerCommon.MailItem> mailItems, Int64 TTL_Period, string packageOrderId = "")
        {
            ArgumentNullReferenceCheckHelper.throwIfNull(systemMailData, () => $"systemMailData is null !!! - receiver:{receiverNickname}");
            ArgumentNullReferenceCheckHelper.throwIfNull(mailItems, () => $"mailItems is null !!! - receiver:{receiverNickname}, sender:{systemMailData.Sender}");

            (var result, ReceivedMailDoc? to_receive_mail_doc) = await Mail.createSystemMail( receiverUserGuid, receiverNickname
                                                                                            , systemMailData.Sender
                                                                                            , systemMailData.Mail_Title, systemMailData.Mail_Desc, contentsArguments
                                                                                            , true, mailItems, TTL_Period, packageOrderId );
            if (result.isFail())
            {
                return (result, null);
            }

            return (result, to_receive_mail_doc);
        }

        public static async Task<(Result, ReceivedMailDoc?)> createSystemMailWithMeta( USER_GUID receiverUserGuid, USER_NICKNAME receiverNickname
                                                                                     , SystemMailMetaData systemMailData, string mailBodyText
                                                                                     , List<ServerCommon.MailItem> mailItems, Int64 TTL_Period, string packageOrderId = "")
        {
            ArgumentNullReferenceCheckHelper.throwIfNull(systemMailData, () => $"systemMailData is null !!! - receiver:{receiverNickname}");
            ArgumentNullReferenceCheckHelper.throwIfNull(mailItems, () => $"mailItems is null !!! - receiver:{receiverNickname}, sender:{systemMailData.Sender}");

            (var result, ReceivedMailDoc? to_receive_mail_doc) = await Mail.createSystemMail(receiverUserGuid, receiverNickname
                                                                                            , systemMailData.Sender
                                                                                            , systemMailData.Mail_Title, mailBodyText, new List<string>()
                                                                                            , true, mailItems, TTL_Period, packageOrderId);
            if (result.isFail())
            {
                return (result, null);
            }

            return (result, to_receive_mail_doc);
        }

        public static async Task<Result> createAndSendSystemMailWithMeta( USER_GUID receiverUserGuid, USER_NICKNAME receiverNickname
                                                                        , SystemMailMetaData systemMailData, List<string> contensArguments
                                                                        , List<ServerCommon.MailItem> mailItems, Int64 TTL_Period, string packageOrderId = "")
        {
            ArgumentNullReferenceCheckHelper.throwIfNull(systemMailData, () => $"systemMailData is null !!! - receiver:{receiverNickname}");
            ArgumentNullReferenceCheckHelper.throwIfNull(mailItems, () => $"mailItems is null !!! - receiver:{receiverNickname}, sender:{systemMailData.Sender}");

            var result = new Result();

            result = await createAndSendSystemMail(receiverUserGuid, receiverNickname
                                                  , systemMailData.Sender
                                                  , systemMailData.Mail_Title, systemMailData.Mail_Desc, contensArguments
                                                  , true, mailItems, TTL_Period, packageOrderId);
            if (result.isFail())
            {
                return result;
            }

            return result;
        }

        public static async Task<Result> createAndSendSystemMail( USER_GUID receiverUserGuid, USER_NICKNAME receiverNickname
                                                                , string senderNickName, string title, string text, List<string> contentsArguments
                                                                , bool isTextByMetaData
                                                                , List<ServerCommon.MailItem> mailItems, Int64 TTL_Period, string packageOrderId = "")
        {
            ArgumentNullReferenceCheckHelper.throwIfNull(mailItems, () => $"mailItems is null !!! - receiver:{receiverNickname}, sender:{senderNickName}");

            var server_logic = GameServerApp.getServerLogic();
            var dynamo_db_client = server_logic.getDynamoDbClient();
            NullReferenceCheckHelper.throwIfNull(dynamo_db_client, () => $"dynamo_db_client is null !!! - receiver:{receiverNickname}, sender:{senderNickName}");

            var result = new Result();

            (result, ReceivedMailDoc? received_mail_doc) = await Mail.createSystemMail( receiverUserGuid
                                                                                      , receiverNickname
                                                                                      , senderNickName, title, text, contentsArguments, isTextByMetaData
                                                                                      , mailItems, TTL_Period, packageOrderId);
            if (result.isFail())
            {
                return result;
            }
            NullReferenceCheckHelper.throwIfNull(received_mail_doc, () => $"received_mail_doc is null !!!");

            result = await dynamo_db_client.simpleUpsertDocumentWithDocType<ReceivedMailDoc>(received_mail_doc);
            if (result.isFail())
            {
                return result;
            }

            return result;
        }

        public static async Task<(Result, ReceivedMailDoc?)> createSystemMail( USER_GUID receiverUserGuid, USER_NICKNAME receiverNickname
                                                                             , string senderNickName, string title, string text, List<string> contentsArguments, bool isTextByMetaData
                                                                             , List<ServerCommon.MailItem> mailItems, Int64 TTL_Period, string packageOrderId = "")
        {
            var now = DateTime.UtcNow;
            var expireDate = DateTimeHelper.MaxTime;
            if (0 < TTL_Period)
            {
                expireDate = now.AddMinutes(TTL_Period);
            }

            return await createSystemMail( receiverUserGuid
                                         , receiverNickname
                                         , senderNickName, title, text, contentsArguments
                                         , isTextByMetaData
                                         , mailItems, expireDate, packageOrderId);
        }

        public static async Task<(Result, ReceivedMailDoc?)> createSystemMail( USER_GUID receiverUserGuid, USER_NICKNAME receiverNickname
                                                                             , string senderNickName, string title, string text, List<string> contentsArguments
                                                                             , bool isTextByMetaData                                                                             
                                                                             , List<ServerCommon.MailItem> mailItems, DateTime expireDate, string packageOrderId = "" )
        {
            ArgumentNullReferenceCheckHelper.throwIfNull(mailItems, () => $"mailItems is null !!! - receiver:{receiverNickname}, sender:{senderNickName}");

            var server_logic = GameServerApp.getServerLogic();
            var dynamo_db_client = server_logic.getDynamoDbClient();
            NullReferenceCheckHelper.throwIfNull(dynamo_db_client, () => $"dynamo_db_client is null !!! - receiver:{receiverNickname}, sender:{senderNickName}");

            var result = new Result();

            var now = DateTime.UtcNow;

            string mail_guid = MailHelper.makeMailGuid(now);
            ReceivedMailDoc? to_create_doc;

            if (expireDate == DateTimeHelper.MaxTime)
            {
                to_create_doc = new ReceivedMailDoc(receiverUserGuid, mail_guid);
            }
            else
            {
                var ttlTime = DynamoDbClientHelper.makeTTLTimeForDynamoDB(expireDate);
                to_create_doc = new ReceivedMailDoc(receiverUserGuid, mail_guid, ttlTime);
            }

            var mail_attrib = to_create_doc.getAttrib<MailAttrib>();
            NullReferenceCheckHelper.throwIfNull(mail_attrib, () => $"mail_attrib is null !!! - receiverUserGuid:{receiverUserGuid}");

            mail_attrib.MailGuid = mail_guid;
            mail_attrib.SenderNickName = senderNickName;
            mail_attrib.ReceiverNickName = receiverNickname;
            mail_attrib.ReceiverGuid = receiverUserGuid;
            mail_attrib.Title = title;
            mail_attrib.Text = text;
            mail_attrib.CreateTime = now;
            mail_attrib.ExpireTime = expireDate;
            mail_attrib.IsSystemMail = true;
            mail_attrib.IsRead = false;
            mail_attrib.IsGetItem = false;
            mail_attrib.IsTextByMetaData = isTextByMetaData;
            mail_attrib.packageOrderId = packageOrderId;
            mail_attrib.ContentsArguments = contentsArguments;

            foreach (var itemInfo in mailItems)
            {
                mail_attrib.ItemList.Add(new ServerCommon.MailItem() { ItemId = itemInfo.ItemId, Count = itemInfo.Count, ProductId = itemInfo.ProductId, isRepeatProduct = itemInfo.isRepeatProduct });
            }

            result = await to_create_doc.newDoc4Query();
            if (result.isFail())
            {
                return (result, null);
            }

            return (result, to_create_doc);
        }

        public override string toBasicString()
        {
            return $"{this.getTypeName()}, MailGuid:{getOriginEntityAttribute<MailAttribute>()?.MailGuid}, SenderNickName:{getOriginEntityAttribute<MailAttribute>()?.SenderNickName}, ReceiverNickName:{getEntityAttribute<MailAttribute>()?.ReceiverNickName}, Title:{getEntityAttribute<MailAttribute>()?.Title}";
        }

        public override string toSummaryString()
        {
            return $"{this.getTypeName()}, {getEntityAttribute<MailAttribute>()?.toBasicString()}";
        }

        public MailInfo toMailData4Client(MailType mailType)
        {
            var mail_4_client = new MailInfo();

            var mail_attribute = getEntityAttribute<MailAttribute>();
            NullReferenceCheckHelper.throwIfNull(mail_attribute, () => "mail_attribute is null !!!");

            mail_4_client.MailKey = mail_attribute.MailGuid;
            mail_4_client.IsRead = mail_attribute.IsRead == true ? 1 : 0;
            mail_4_client.IsGetItem = mail_attribute.IsGetItem == true ? 1 : 0;
            mail_4_client.IsSystemMail = mail_attribute.IsSystemMail == true ? 1 : 0;
            mail_4_client.NickName = mailType == MailType.ReceivedMail ? mail_attribute.SenderNickName : mail_attribute.ReceiverNickName;
            mail_4_client.Guid = mailType == MailType.ReceivedMail ? mail_attribute.SenderGuid : mail_attribute.ReceiverGuid;
            mail_4_client.Title = mail_attribute.Title;
            mail_4_client.Text = mail_attribute.Text;
            mail_4_client.CreateTime = Timestamp.FromDateTime(mail_attribute.CreateTime);
            mail_4_client.ExpireTime = Timestamp.FromDateTime(mail_attribute.ExpireTime);
            mail_4_client.MailType = (int)mailType;
            mail_4_client.IsTextByMetaData = mail_attribute.IsTextByMetaData == true ? BoolType.True : BoolType.False;
            mail_4_client.IsPermanentMail = mail_attribute.ExpireTime == DateTimeHelper.MaxTime ? BoolType.True : BoolType.False;
            mail_4_client.ContentsArguments.AddRange(mail_attribute.ContentsArguments);

            foreach (var mailItemInfo in mail_attribute.ItemList)
            {
                var mailItem = new MailItem();
                mailItem.ItemId = (int)mailItemInfo.ItemId;
                mailItem.Count = mailItemInfo.Count;
                mail_4_client.ItemList.Add(mailItem);
            }

            return mail_4_client;
        }
        
        
        public static async Task<(Result, ReceivedMailDoc?)> createSystemMailDocByMOS2User( USER_GUID receiverUserGuid, USER_NICKNAME receiverNickname
                                                                             , string senderNickName, string title, string text, List<ServerCommon.MailItem> mailItems)
        {
            var server_logic = GameServerApp.getServerLogic();
            var dynamo_db_client = server_logic.getDynamoDbClient();
            NullReferenceCheckHelper.throwIfNull(dynamo_db_client, () => $"dynamo_db_client is null !!! - receiver:{receiverNickname}, sender:{senderNickName}");

            var result = new Result();

            var now = DateTime.UtcNow;

            string mail_guid = MailHelper.makeMailGuid(now);
            
            var expireDate = DateTime.UtcNow.AddMinutes(MetaHelper.GameConfigMeta.SystemMailStoragePeriod);
            
            var ttlTime = DynamoDbClientHelper.makeTTLTimeForDynamoDB(expireDate);
            var to_create_doc = new ReceivedMailDoc(receiverUserGuid, mail_guid, ttlTime);

            var mail_attrib = to_create_doc.getAttrib<MailAttrib>();
            NullReferenceCheckHelper.throwIfNull(mail_attrib, () => $"mail_attrib is null !!! - receiverUserGuid:{receiverUserGuid}");

            mail_attrib.MailGuid = mail_guid;
            mail_attrib.SenderNickName = senderNickName;
            mail_attrib.ReceiverNickName = receiverNickname;
            mail_attrib.ReceiverGuid = receiverUserGuid;
            mail_attrib.Title = title;
            mail_attrib.Text = text;
            mail_attrib.CreateTime = now;
            mail_attrib.ExpireTime = expireDate;
            mail_attrib.IsSystemMail = true;
            mail_attrib.IsRead = false;
            mail_attrib.IsGetItem = false;
            mail_attrib.IsTextByMetaData = false;
            mail_attrib.packageOrderId = "";

            foreach (var itemInfo in mailItems)
            {
                mail_attrib.ItemList.Add(new ServerCommon.MailItem() { ItemId = itemInfo.ItemId, Count = itemInfo.Count, ProductId = itemInfo.ProductId, isRepeatProduct = itemInfo.isRepeatProduct });
            }

            result = await to_create_doc.newDoc4Query();
            if (result.isFail())
            {
                return (result, null);
            }

            return (result, to_create_doc);
        }
    }
}