using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        decimal MyNumber = 1397.7M; //TEST NUMBER

        int main_value = (int)MyNumber;

        string mainText = "فقط " + Tafqit(main_value);

        string fracText;

        decimal q = Math.Floor(MyNumber); 

        if (!(q == MyNumber))  //check if there is a fraction part

        {

           string tempfrac = Decimal.Round(MyNumber, 2).ToString().Split('.')[1];

           int frac_value = int.Parse(tempfrac);

           if (tempfrac.Length == 1 || tempfrac.Length == 2 && tempfrac[1] == '0')  //Check the case examples of 0.2 or 0.20

           {

              frac_value *= 10;

           }

           fracText = Tafqit(frac_value, CurrPart: "frac");

           mainText += " و" + fracText + " لا غير.";

        }

        Console.WriteLine(mainText);

    }

    public static string Tafqit(int NumIn = 0, bool Feminine = false, bool Comma = false, bool SplitHund = false, bool Miah = true,

            bool Billions = false, bool TextToFollow = false, bool AG = false, bool Legal = false, string CurrPart = "main")

    {

        //{Feminine,Comma,SplitHund,Miah,Billions,TextToFollow,AG,Subject,Legal}={}

        string[] TableScales = { "", "ألف", "مليون", "مليار", "ترليون", "كوادرليون", "كوينتليون", "سكستليون" }, // Add here only

        TableScalesP = { "", "آلاف", "ملايين", "مليارات" }, // Do not change this table

        TableMale = { "", "واحد", "اثنان", "ثلاثة", "أربعة", "خمسة", "ستة", "سبعة", "ثمانية", "تسعة", "عشرة" },

        TableFemale = { "", "واحدة", "اثنتان", "ثلاث", "أربع", "خمس", "ست", "سبع", "ثمان", "تسع", "عشر" };

​

        string[] Subject;

        if (CurrPart == "frac")

        { 

            Subject = new[] { "قرشا", "قرشان", "قروش", "قرشا" };

        }

        else

        {

            Subject = new[] { "جنيه", "جنيهان", "جنيهات", "جنيهاً" };

        }

​

        if (NumIn == 0) return "صفر"; // if 0 or "0" then "zero"

​

        int Triplet=0, ScalePos;

        string Scale, ScalePlural, NumberInWords = "";

        bool IsLastEffTriplet = false;

​

        bool IsAG = (AG == true);                     // Option Accusative or Genitive case Grammar?

        string SpWa = " و";                             // AND word

        string Ahad = "أحد";              // Masculine

        //string Ehda = "إحدى";           //Feminine 11

​

        // ---- Setup constants for the AG Option (Accusative/Genitive or Nominative case Grammar)

        string Taa = IsAG ? "تي" : "تا", Taan = IsAG ? "تين" : "تان";      // Hundred 2's مئتا/مائتا مئتان/مائتان

        string Aa = IsAG ? "ي" : "ا", Aan = IsAG ? "ين" : "ان";            // Scale 2's الفا/مليونا الفان/مليونان

        string Ethna = IsAG ? "اثني" : "اثنا", Ethnata = IsAG ? "اثنتي" : "اثنتا";        // Masculine/Feminine 12 starting word

        string Ethnan = IsAG ? "اثنين" : "اثنان", Ethnatan = IsAG ? "اثنتين" : "اثنتان";  // Masculine/Feminine 2

        string Woon = IsAG ? "ين" : "ون";              // Second part of 20's to 90's

        //string IsSubject = Array.isArray(Subject) && Subject.length === 4;        // Check for Subject Array Names

        //if (IsSubject) TextToFollow = false;

​

        // Convert Arabic-Indic Numbers to Arabic if any

        //+ NumIn.ToString().Replace("/[٠-٩] /g", d => "٠١٢٣٤٥٦٧٨٩".IndexOf(d)); 

        string newNumIn; // Make numeric string

        //string wordMiah = (Miah == true) ? "مئة" : "مائة";     // Select chosen Miah (Hundred) Option

​

        var TableUnits = new string[TableMale.Length];

        TableMale.CopyTo(TableUnits, 0);         // Create copies of Masculine Table for manipulation

        var Table11_19 = new string[TableMale.Length];

        TableMale.CopyTo(Table11_19, 0);         // Create copies of Masculine Table for manipulation

        Table11_19[0] = TableFemale[10];         // Borrow word "عشرة" from Feminine's Table for use in 11-19

        Table11_19[1] = Ahad;                    // Masculine starting words for 11

        Table11_19[2] = Ethna;                   // Masculine starting words for 12

        TableUnits[2] = Ethnan;                  // Masculine word for 2

​

        //NumIn = "0".repeat(NumIn.length * 2 % 3) + NumIn;        // Convert Number to a Triplets String

        newNumIn = NumIn.ToString();

        if (! (NumIn.ToString().Length * 2 % 3 == 0))

        {

            newNumIn = 0.ToString("D" + (NumIn.ToString().Length * 2 % 3)) + NumIn.ToString();

        }

        var NumLen = newNumIn.Length;

        int next_triplet_idx;

        for (int digits = NumLen; digits > 0; digits -= 3)         // Loop and convert each Triplet

        {

            //Triplet = + newNumIn.Substring(NumLen - digits, 3);                       // Get a Triplet Number

            Triplet = Convert.ToInt32(newNumIn.Substring(NumLen - digits, 3));          // Get a Triplet Number

​

            // Determine if Last Effective Triplet

            next_triplet_idx = NumLen - digits + 3;

            IsLastEffTriplet = true;

            if (next_triplet_idx < newNumIn.Length)

            {

                IsLastEffTriplet = Convert.ToInt32(newNumIn.Substring(next_triplet_idx)) == 0;  

            }

​

            if (Triplet > 0)

            {                                                  // If not Empty: Convert Triplet Number to Words

                ScalePos = digits / 3 - 1;                     // Position of Scale Name in Scale Table

                Scale = TableScales[ScalePos];                 // Get Scale Name

                ScalePlural = (ScalePos < 4 ? TableScalesP[ScalePos] : TableScales[ScalePos] + "ات"); // Make Scale Plural

                if (Billions && ScalePos == 3)

                {

                    Scale = "بليون";

                    ScalePlural = "بلايين";    // If Billions Option

                }

                NumberInWords += oneTripletToWords(Triplet, TableFemale, SplitHund, Miah, Scale, TextToFollow, Taa, Taan, Legal, IsLastEffTriplet,

                                                   TableUnits, Subject, Table11_19, ScalePlural, Woon, Aa, Aan);  // Convert 1 Triplet to Words

                if (!IsLastEffTriplet) NumberInWords += (Comma ? "،" : "") + SpWa; // Add "و " and Option Comma

            }

        } // All done with conversion,

        //Process Subject Name if any

        string SubjectName = "";

        int Num_99 = Triplet % 100;                                 // 00 to 99

        if (Subject.Length > 0)

        {                                                           // Process Subject Name

            string space = !IsLastEffTriplet ? "" : " ";            // Position correct spacing

            //Triplet = +(Triplet + "").slice(-2);                  // Get last 2 digits of last Triplet

            Triplet = Triplet % 100;

            SubjectName = space + Subject[0];                       // Default Subject Name is at Pos 0

            if (Triplet > 10) SubjectName = space + Subject[3];     // Subject name with Tanween for 11-99

            else if (Triplet > 2) SubjectName = space + Subject[2]; // Subject name Plural for 3-10

            else if (Triplet > 0) SubjectName = Subject[Triplet - 1] + " " + TableUnits[Num_99];  // Reverse names for 1 or 2

        }

        return NumberInWords + SubjectName;  // All done

    }

​

    public static string oneTripletToWords(int Triplet, string[] TableFemale, bool SplitHund, bool Miah, string Scale, bool TextToFollow,

            string Taa, string Taan, bool Legal, bool IsLastEffTriplet, string[] TableUnits, string[] Subject, string[] Table11_19, string ScalePlural, 

            string Woon, string Aa, string Aan)

    {

        int Num_99 = Triplet % 100,                 // 00 to 99

        Num_100 = ~~(Triplet / 100),            // Hundreds (1 digit)

        Num_Unit = Num_99 % 10,                 // 0 to 9 (1 digit)

        Num_Tens = ~~(Num_99 / 10);             // Tens   (1 digit)

        string Word_100 = "",

        Word_99 = "";             // Holds words for Hundreds & 0-99

        string wordMiah = (Miah == true) ? "مئة" : "مائة";

        string SpWa = " و";

        string TanweenLetter = "ًا";                   // Tanween Fatih for Scale Names above 10

​

        //if (Feminine && IsLastEffTriplet)

        //{ // If Feminine, use the Feminine table if Last Effective Triplet

        //    TableUnits = [...TableFemale]; Table11_19 = [...TableFemale];// Create copies of Feminine Table for manipulation

        //    Table11_19[0] = TableMale[10];             // Borrow word "عشر" from Masculine's Table for use in 11-19

        //    Table11_19[1] = Ehda;                      // Feminine starting words for 11

        //    Table11_19[2] = Ethnata;                   // Feminine starting words for 12

        //    TableUnits[2] = Ethnatan;                  // Feminine word for 2

        //    if (Num_99 > 19) TableUnits[1] = Ehda;     // Feminine word for 1 used in 20's to 90's

        //}

​

        if (Num_100 > 0)

        {                              // ---- Do Hundreds (100 to 900)

            if (Num_100 > 2)

            {

                Word_100 = TableFemale[Num_100] + (SplitHund == true ? " " : "") + wordMiah; // 300-900

            }

            else if (Num_100 == 1)

            {

                Word_100 = wordMiah;                                                         // 100

            }

            else

            {

                Word_100 = wordMiah.Substring(0, wordMiah.Length - 1) + ((Scale != "" && Num_99 == 0) || TextToFollow ? Taa : Taan);   // 200 Use either مئتا or مئتان

            }

        }

​

        if (Num_99 > 19) Word_99 = TableUnits[Num_Unit] + (Num_Unit > 0 ? SpWa : "") +      // 20-99 Units و and

            (Num_Tens == 2 ? "عشر" : TableFemale[Num_Tens]) + Woon;             // Add Woon for 20's or 30's to 90's

        else if (Num_99 > 10) Word_99 = Table11_19[Num_99 - 10] + " " + Table11_19[0];      // 11-19

        else if (Num_99 > 2 || Num_99 == 0 || Subject.Length==0) Word_99 = TableUnits[Num_99].ToString();  // 0 or 3-10 (else keep void for 1 &2)

​

        string Words999 = Word_100 + (Num_100 > 0 && Num_99 > 0 ? SpWa : "") + Word_99;         // Join Hund, Tens, and Units

​

        if (Scale != "")

        {                                                                                       // Add Scale Name if applicable

            string legalTxt = (Legal && Num_99 < 3) ? " " + Scale : "";                         // if Legal Option add Extra Word

            string Word_100Wa = (Num_100 > 0 ? Word_100 + legalTxt + SpWa : "") + Scale;        // Default Scale Name

            if (Num_99 > 2)

            {

                Words999 += " " +                                                               // Scale for for 3 to 99

                    (Num_99 > 10 ? Scale + (IsLastEffTriplet && TextToFollow ? "" : TanweenLetter)  // Scale for 11 to 99 (Tanween)

                     : ScalePlural);                                                                 // Scale for 3 to 10 (Plural)

            }

            else

            {

                if (Num_99 == 0) Words999 += " " + Scale;                          // Scale for 0

                else if (Num_99 == 1) Words999 = Word_100Wa;                          // Scale for 1

                else Words999 = Word_100Wa + (IsLastEffTriplet && TextToFollow ? Aa : Aan);// Scale for 2 ألفا or ألفان

            }

        }

        return Words999; //Return the Triple in Words

    }

​

}