using Google.Protobuf.WellKnownTypes;
using Newtonsoft.Json;


using ServerCore;
using ServerBase;


using MAIL_GUID = System.String;
using USER_GUID = System.String;


namespace ServerCommon;


public class SystemMetaMailAttribute : EntityAttributeBase, ICopyEntityAttributeFromDoc, IMergeWithEntityAttribute
{
    [JsonProperty("mail_id")]
    public Int32 MailId { get; set; } = 0;

    [JsonProperty("sender_nickname")]
    public List<OperationSystemMessage> SenderNickName { get; set; } = new();

    [JsonProperty("title")] 
    public List<OperationSystemMessage> Title { get; set; } = new();

    [JsonProperty("text")]
    public List<OperationSystemMessage> Text { get; set; } = new();

    [JsonProperty("start_time")]
    public DateTime StartTime { get; set; } = new();

    [JsonProperty("end_time")]
    public DateTime EndTime { get; set; } = new();

    [JsonProperty("item_list")]
    public List<MailItem> ItemList { get; set; } = new();


    public SystemMetaMailAttribute(EntityBase owner)
        : base(owner)
    {
    }

    public override void onClear()
    {
        MailId = 0;
        SenderNickName = new();
        Title = new();
        Text = new();
        StartTime = new();
        EndTime = new();
        ItemList = new List<MailItem>();

        getAttributeState().reset();
    }

    public override IEntityAttributeTransactor onNewEntityAttributeTransactor()
    {
        return new SystemMailAttributeTransactor(getOwner());
    }

    public override EntityAttributeBase onCloned()
    {
        var cloned = new SystemMetaMailAttribute(getOwner());
        cloned.MailId = MailId;
        cloned.SenderNickName = SenderNickName;
        cloned.Title = Title;
        cloned.Text = Text;
        cloned.StartTime = StartTime;
        cloned.EndTime = EndTime;
        cloned.ItemList = ItemList.Select(x => new MailItem() { ItemId = x.ItemId, Count = x.Count }).ToList();

        return cloned;
    }

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

        var result = new Result();

        //=====================================================================================
        // Attribute => try pending Doc
        //=====================================================================================
        var try_pending_doc = getTryPendingDocBase() as SystemMetaMailDoc;
        if (null == try_pending_doc)
        {
            var to_copy_doc = new SystemMetaMailDoc(MailId.ToString());

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

            try_pending_doc = to_copy_doc;

            setTryPendingDocBase(try_pending_doc);
        }

        var system_meta_mail_attrib = try_pending_doc.getAttrib<SystemMetaMailAttrib>();
        NullReferenceCheckHelper.throwIfNull(system_meta_mail_attrib, () => $"system_meta_mail_attrib is null !!! - {owner.toBasicString()}");

        system_meta_mail_attrib.MailId = MailId;
        system_meta_mail_attrib.SenderNickName = SenderNickName;
        system_meta_mail_attrib.Title = Title;
        system_meta_mail_attrib.Text = Text;
        system_meta_mail_attrib.StartTime = StartTime;
        system_meta_mail_attrib.EndTime = EndTime;
        system_meta_mail_attrib.ItemList = ItemList.Select(x => new MailItem() { ItemId = x.ItemId, Count = x.Count }).ToList();

        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 bool copyEntityAttributeFromDoc(DynamoDbDocBase docBase)
    {
        var owner = getOwner();

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

        var to_cast_string = typeof(SystemMetaMailDoc).Name;

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

        //=====================================================================================
        // New Doc => Origin Doc
        //=====================================================================================
        syncOriginDocBaseWithNewDoc<SystemMetaMailAttribute>(system_meta_mail_doc);

        //=====================================================================================
        // Doc => Attribute
        //=====================================================================================
        var system_meta_mail_attrib = system_meta_mail_doc.getAttrib<SystemMetaMailAttrib>();
        NullReferenceCheckHelper.throwIfNull(system_meta_mail_attrib, () => $"system_meta_mail_attrib is null !!! - {owner.toBasicString()}");

        if (system_meta_mail_attrib == null)
        {
            err_msg = $"Failed to get system mail attrib : {nameof(SystemMetaMailAttrib)}";
            result.setFail(ServerErrorCode.EntityAttributeIsNull, err_msg);
            Log.getLogger().error(err_msg);
            return false;
        }

        MailId = system_meta_mail_attrib.MailId;
        SenderNickName = system_meta_mail_attrib.SenderNickName;
        Title = system_meta_mail_attrib.Title;
        Text = system_meta_mail_attrib.Text;
        StartTime = system_meta_mail_attrib.StartTime;
        EndTime = system_meta_mail_attrib.EndTime;
        ItemList = system_meta_mail_attrib.ItemList.Select(x => new MailItem() { ItemId = x.ItemId, Count = x.Count }).ToList();

        return true;
    }

    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 system_mail_attribute = otherEntityAttribute as SystemMetaMailAttribute;
        if (null == system_mail_attribute)
        {
            err_msg = $"Failed to cast SystemMailAttribute !!!, system_mail_attribute is null";
            result.setFail(ServerErrorCode.ClassTypeCastIsNull, err_msg);
            Log.getLogger().error(result.toBasicString());

            return result; 
        }

        MailId = MailId;
        SenderNickName = system_mail_attribute.SenderNickName;
        Title = system_mail_attribute.Title;
        Text = system_mail_attribute.Text;
        StartTime = system_mail_attribute.StartTime;
        EndTime = system_mail_attribute.EndTime;
        ItemList = system_mail_attribute.ItemList.Select(x => new MailItem() { ItemId = x.ItemId, Count = x.Count }).ToList();

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

            syncOriginDocBaseWithNewDoc<SystemMetaMailAttribute>(try_pending_doc);
        }

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

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

        system_meta_mail_attrib.MailId = MailId;
        system_meta_mail_attrib.SenderNickName = SenderNickName;
        system_meta_mail_attrib.Title = Title;
        system_meta_mail_attrib.Text = Text;
        system_meta_mail_attrib.StartTime = StartTime;
        system_meta_mail_attrib.EndTime = EndTime;
        system_meta_mail_attrib.ItemList = ItemList.Select(x => new MailItem() { ItemId = x.ItemId, Count = x.Count }).ToList();

        return result;
    }
}

public class SystemMailAttributeTransactor : EntityAttributeTransactorBase<SystemMetaMailAttribute>, ICopyEntityAttributeTransactorFromEntityAttribute
{
    public SystemMailAttributeTransactor(EntityBase owner)
        : base(owner)
    {
    }

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

        var to_cast_string = typeof(SystemMetaMailAttribute).Name;

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

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

        copy_to_system_mail_attribute.MailId = copy_from_system_mail_attribute.MailId;
        copy_to_system_mail_attribute.SenderNickName = copy_from_system_mail_attribute.SenderNickName;
        copy_to_system_mail_attribute.Title = copy_from_system_mail_attribute.Title;
        copy_to_system_mail_attribute.Text = copy_from_system_mail_attribute.Text;
        copy_to_system_mail_attribute.StartTime = copy_from_system_mail_attribute.StartTime;
        copy_to_system_mail_attribute.EndTime = copy_from_system_mail_attribute.EndTime;
        copy_to_system_mail_attribute.ItemList = copy_from_system_mail_attribute.ItemList.Select(x => new MailItem() { ItemId = x.ItemId, Count = x.Count}).ToList();

        return true;
    }
}