using System;

namespace Dakota.Models
{
    internal class Datenelement : Dateneinheit
    {
        private string _Value;
        private bool _IsDecimal;
        
        public int MinStellen { get; set; }
        public int MaxStellen { get; set; }

        public Feldart Feldart { get; set; }

        public Datenelement(string title)
        {
            Title = title;

            _IsDecimal = false;
        }

        public Datenelement(string title, int min, int max, Feldart art) : this(title)
        {
            MinStellen = min;
            MaxStellen = max;
            Feldart = art;
        }

        public Datenelement(string title, int count, Feldart art) : this(title, count, count, art)
        {

        }

        public override string GetValue()
        {
            if(!HasValue())
            {
                if(Feldart == Feldart.Muss)
                {
                    // Auffüllen

                    throw new NotImplementedException("Error Code: 3483091097896");
                }
                else
                {
                    // Leer lassen

                    return string.Empty;
                }
            }

            if (!_IsDecimal && (_Value.Length < MinStellen || _Value.Length > MaxStellen))
            {
                throw new NotImplementedException("Error Code: 3483091097897");
            }

            return _Value;
        }

        public void SetFilledIntValue(int value, int length)
        {
            if (value.ToString().Length > length)
                throw new ArgumentOutOfRangeException("length", $"the length of {value} is bigger than len {length}");

            SetValue(value.ToString("D" + length.ToString()));
        }

        public void SetValue(string value)
        {
            if (value is string)
            {
                if (value.Length < MinStellen || value.Length > MaxStellen)
                {
                    throw new ArgumentOutOfRangeException(Title, value, $"Wertebereich: min:max = ({MinStellen}:{MaxStellen})");
                }
            }
            else
            {
                throw new ArgumentOutOfRangeException(Title, value, "value ist kein string");
            }

            DakotaValidator.ClearTextString(value);

            _Value = value;

            _IsDecimal = false;
        }

        public void SetDecimalValue(Decimal input)
        {
            var dec = input.ToString("#.00").Replace(".", ",");
            var tester = Math.Abs(input).ToString("#.00").Replace(".", "");

            if (tester.Length < MinStellen || tester.Length > MaxStellen)
            {
                throw new NotImplementedException("Error Code: 3483091097895");
            }
            else
            {
                _Value = dec;
            }

            _IsDecimal = true;
        }
    }
}