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

namespace Business.StructuredDB
{
    public class ResultHelper
    {
        public static ResultViewModel CreateResult(int row, string msg)
        {
            ResultCode code = ResultCode.Fail, subCode = ResultCode.BusinessError;
            if (row > 0)
            {
                code = ResultCode.Success;
            }
            else
            {
                if (msg == "")
                {
                    subCode = ResultCode.ExistsError;
                }
            }

            return CreateResult(code, null, subCode, msg);
        }

        public static ResultViewModel CreateResult(ResultCode code = ResultCode.Fail, dynamic data = null, ResultCode subCode = ResultCode.Fail, string subMsg = "")
        {
            string Msg = GetCustomAttributes(code);
            if (code == ResultCode.Success)
            {
                subCode = code;
                subMsg = string.IsNullOrEmpty(subMsg) ? Msg : subMsg;
            }
            else
            {
                subMsg = string.IsNullOrEmpty(subMsg) ? GetCustomAttributes(subCode) : subMsg;
            }

            return new ResultViewModel()
            {
                Code = Convert.ToInt32(code).ToString(),
                Msg = Msg,
                SubCode = Convert.ToInt32(subCode).ToString(),
                SubMsg = subMsg,
                Data = data
            };
        }

        private static string GetCustomAttributes(ResultCode code)
        {
            Type type = code.GetType();
            FieldInfo fieldInfo = type.GetField(code.ToString());
            var customAttributes = fieldInfo.GetCustomAttributesData();
            if (customAttributes.Count > 0)
            {
                return customAttributes[0].NamedArguments[0].TypedValue.Value.ToString();
            }
            return "";
        }
    }

}