private static bool AreThereNineVariationInValue(string value, NumbersType type)
{
var firstLetter = ' ';
var secondLetter = ' ';
switch (type)
{
case NumbersType.Hundreds:
firstLetter = 'M';
secondLetter = 'C';
break;
case NumbersType.Tens:
firstLetter = 'C';
secondLetter = 'X';
break;
case NumbersType.Units:
firstLetter = 'X';
secondLetter = 'I';
break;
}
if ((value.LastIndexOf(firstLetter) + 1) - 2 >= 0)
return value[(value.LastIndexOf(firstLetter) + 1) - 2] == secondLetter;
return false;
}
private static bool AreThereFourVariationInValue(string value, NumbersType type)
{
var letter = string.Empty;
switch (type)
{
case NumbersType.Hundreds:
letter = "CD";
break;
case NumbersType.Tens:
letter = "XL";
break;
case NumbersType.Units:
letter = "IV";
break;
}
return value.Contains(letter);
}
private static bool AreThereOneVariationInValue(string value,NumbersType type)
{
var letter = ' ';
switch (type)
{
case NumbersType.Hundreds:
letter = 'C';
break;
case NumbersType.Tens:
letter = 'X';
break;
case NumbersType.Units:
letter = 'I';
break;
}
return value.Contains(letter) && !AreThereFourVariationInValue(value, type) && !ContainsSpecialCases(value);
}
private static int GetNumbers(string value,NumbersType type)
{
var numbers = 0;
var numberHelper = GetNumberHelper(type);
if (AreThereNineVariationInValue(value, type))
numbers = CalculateFiveVariations(type) + (numberHelper * 4);
if (AreThereFourVariationInValue(value, type) && numbers == 0)
numbers = CalculateFiveVariations(type) - (numberHelper * 1);
if (AreThereFiveVariationInValue(value, type) && numbers == 0)
numbers = CalculateFiveVariations(type);
if (AreThereOneVariationInValue(value, type) && (numbers == 0 || numbers == (numberHelper * 5)))
numbers += CalculateOneVariations(value, type);
return numbers;
}
private static int GetNumberHelper(NumbersType type)
{
var number = 0;
switch (type)
{
case NumbersType.Hundreds:
number = 100;
break;
case NumbersType.Tens:
number = 10;
break;
case NumbersType.Units:
number = 1;
break;
}
return number;
}
private static int CalculateOneVariations(string value,NumbersType type)
{
var letter = ' ';
var number = 0;
switch (type)
{
case NumbersType.Hundreds:
letter = 'C';
number = 100;
break;
case NumbersType.Tens:
letter = 'X';
number = 10;
break;
case NumbersType.Units:
letter = 'I';
number = 1;
break;
}
return value.ToCharArray().Where(x => x == letter).Count()*number;
}
private static int CalculateFiveVariations(NumbersType type)
{
var number = 0;
switch (type)
{
case NumbersType.Hundreds:
number = 500;
break;
case NumbersType.Tens:
number = 50;
break;
case NumbersType.Units:
number = 5;
break;
}
return number;
}