using System;
using IwbZero.IwbDataQuery;
using IwbZero.ToolCommon.StringModel;

namespace IwbZero.IwbBase
{
    public class IwbRtVariable
    {
        private object _varValue;

        public IwbRtVariable(string pcVarName, string pcVarType= "NCHAR")
        {
            VarName = pcVarName.UAndT();
            DataType = new IwbDataType(pcVarType);
        }

        public string VarName { get; }

        public object VarValue
        {
            get
            {
                if (_varValue == null)
                {
                    if (DataType.IsDateTime)
                    {
                        _varValue = "".StrToDt();
                    }
                    else if (DataType.IsNumeric)
                    {
                        _varValue = 0;
                    }
                    else
                    {
                        _varValue = "";
                    }
                }
                return _varValue;
            }
            set
            {
                if (DataType.IsDateTime)
                {
                    if (value == null)
                    {
                        _varValue = "".StrToDt();
                    }
                    else if (value is DateTime)
                    {
                        _varValue = value;
                    }
                    else
                    {
                        _varValue = value.ToString().StrToDt();
                    }
                }
                else if (DataType.IsNumeric)
                {
                    if (value == null)
                    {
                        _varValue = 0;
                    }
                    else
                    {
                        _varValue = value.ToString().ValD();
                    }
                }
                else if (value == null)
                {
                    _varValue = "";
                }
                else
                {
                    _varValue = value;
                }
            }
        }
        [Newtonsoft.Json.JsonIgnore]
        public IwbDataType DataType { get; }

        public IwbRtVariable SetValue(object value)
        {
            VarValue = value;
            return this;
        }
        public string GetStringValue()
        {
            string str = "";
            if (_varValue != null)
            {
                str = _varValue.ToString();
            }
            if (DataType.IsDateTime && (_varValue is DateTime dateTime))
            {
                str = dateTime.DtToStr();
            }
            return str;
        }

        public static IwbRtVariable Str2Variable(string str)
        {
            var arr = str.StrToArray(":");
            string id = "", type = "NCHAR", value = "";

            if (arr.Length > 0)
            {
                id = arr[0].UAndT();
            }
            if (arr.Length > 1)
            {
                type = arr[1];
            }
            if (arr.Length > 2)
            {
                value = arr[2];
            }
            var variable = new IwbRtVariable(id, type).SetValue(value);
            return variable;
        }
        public static string Variable2Str(IwbRtVariable v)
        {
            return $"[{v.VarName}:{v.DataType.TypeString}:{v.GetStringValue()}]";
        }
    }
}