using System;

namespace Console.Waterworks.Core.Specialists
{
    internal static class CoercionSpecialist
    {
        internal static object CoerceArgument(Type requiredType, string inputValue)
        {
            var requiredTypeCode = Type.GetTypeCode(requiredType);
            string exceptionMessage = $"Cannnot coerce the input argument {inputValue} to required type {requiredType.Name}";

            object result = null;
            switch (requiredTypeCode)
            {
                case TypeCode.String:
                    result = inputValue;
                    break;

                case TypeCode.Int16:
                    short number16;
                    if (Int16.TryParse(inputValue, out number16))
                    {
                        result = number16;
                    }
                    else
                    {
                        throw new ArgumentException(exceptionMessage);
                    }
                    break;

                case TypeCode.Int32:
                    int number32;
                    if (Int32.TryParse(inputValue, out number32))
                    {
                        result = number32;
                    }
                    else
                    {
                        throw new ArgumentException(exceptionMessage);
                    }
                    break;

                case TypeCode.Int64:
                    long number64;
                    if (Int64.TryParse(inputValue, out number64))
                    {
                        result = number64;
                    }
                    else
                    {
                        throw new ArgumentException(exceptionMessage);
                    }
                    break;

                case TypeCode.Boolean:
                    bool trueFalse;
                    if (bool.TryParse(inputValue, out trueFalse))
                    {
                        result = trueFalse;
                    }
                    else
                    {
                        throw new ArgumentException(exceptionMessage);
                    }
                    break;

                case TypeCode.Byte:
                    byte byteValue;
                    if (byte.TryParse(inputValue, out byteValue))
                    {
                        result = byteValue;
                    }
                    else
                    {
                        throw new ArgumentException(exceptionMessage);
                    }
                    break;

                case TypeCode.Char:
                    char charValue;
                    if (char.TryParse(inputValue, out charValue))
                    {
                        result = charValue;
                    }
                    else
                    {
                        throw new ArgumentException(exceptionMessage);
                    }
                    break;

                case TypeCode.DateTime:
                    DateTime dateValue;
                    if (DateTime.TryParse(inputValue, out dateValue))
                    {
                        result = dateValue;
                    }
                    else
                    {
                        throw new ArgumentException(exceptionMessage);
                    }
                    break;
                case TypeCode.Decimal:
                    Decimal decimalValue;
                    if (Decimal.TryParse(inputValue, out decimalValue))
                    {
                        result = decimalValue;
                    }
                    else
                    {
                        throw new ArgumentException(exceptionMessage);
                    }
                    break;
                case TypeCode.Double:
                    Double doubleValue;
                    if (Double.TryParse(inputValue, out doubleValue))
                    {
                        result = doubleValue;
                    }
                    else
                    {
                        throw new ArgumentException(exceptionMessage);
                    }
                    break;
                case TypeCode.Single:
                    Single singleValue;
                    if (Single.TryParse(inputValue, out singleValue))
                    {
                        result = singleValue;
                    }
                    else
                    {
                        throw new ArgumentException(exceptionMessage);
                    }
                    break;
                case TypeCode.UInt16:
                    UInt16 uInt16Value;
                    if (UInt16.TryParse(inputValue, out uInt16Value))
                    {
                        result = uInt16Value;
                    }
                    else
                    {
                        throw new ArgumentException(exceptionMessage);
                    }
                    break;
                case TypeCode.UInt32:
                    UInt32 uInt32Value;
                    if (UInt32.TryParse(inputValue, out uInt32Value))
                    {
                        result = uInt32Value;
                    }
                    else
                    {
                        throw new ArgumentException(exceptionMessage);
                    }
                    break;
                case TypeCode.UInt64:
                    UInt64 uInt64Value;
                    if (UInt64.TryParse(inputValue, out uInt64Value))
                    {
                        result = uInt64Value;
                    }
                    else
                    {
                        throw new ArgumentException(exceptionMessage);
                    }
                    break;
                default:
                    throw new ArgumentException(exceptionMessage);
            }
            return result;
        }
    }
}