using ServerCommon;
using ServerCore; using ServerBase;

using META_ID = System.UInt32;

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

        public override async Task<Result> onInit()
        {
            var parent = getDirectParent();
            NullReferenceCheckHelper.throwIfNull(parent, () => $"parent is null !!!");
            addEntityAttribute(new PackageRepeatAttribute(this, parent));

            return await base.onInit();
        }

        public static async Task<(Result, Package?)> createPackageFromDoc(EntityBase parent, PackageRepeatDoc doc)
        {
            var package = new Package(parent);
            var result = await package.onInit();
            if (result.isFail())
            {
                return (result, null);
            }

            var err_msg = string.Empty;

            var package_attribute = package.getEntityAttribute<PackageRepeatAttribute>();
            ArgumentNullException.ThrowIfNull(package_attribute);

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

            return (result, package);
        }

        public static async Task<(Result, Package?)> createPackage(Player owner, string order_guid, META_ID product_meta_id, int left_count, DateTime next_give_time)
        {
            var package = new Package(owner);
            var result = await package.onInit();
            if (result.isFail())
            {
                return (result, null);
            }

            var err_msg = string.Empty;
            
            var package_attribute = package.getEntityAttribute<PackageRepeatAttribute>();
            if (package_attribute == null)
            {
                err_msg = $"Failed to get package attribute : {nameof(PackageRepeatAttribute)}";
                result.setFail(ServerErrorCode.EntityAttributeIsNull, err_msg);
                Log.getLogger().error(err_msg);
                return (result, null);
            }

            package_attribute.OrderGuid = order_guid;
            package_attribute.ProductMetaId = product_meta_id;
            package_attribute.LeftCount = left_count;
            package_attribute.NextGiveTime = next_give_time;

            package_attribute.newEntityAttribute();

            return (result, package);
        }
    }
}