using System;
using System.Text;
using System.Collections;
using System.Collections.Generic;

namespace FastReport.Functions
{
    internal class NumToWordsDe : NumToWordsBase
    {
        private static Dictionary<string, CurrencyInfo> currencyList;

        private static string[] fixedWords =
        {
      "", "ein", "zwei", "drei", "vier", "fünf", "sechs",
      "sieben", "acht", "neun", "zehn", "elf",
      "zwölf", "dreizehn", "vierzehn", "fünfzehn",
      "sechzehn", "siebzehn", "achtzehn", "neunzehn"
    };

        private static string[] tens =
        {
      "", "zehn", "zwanzig", "dreißig", "vierzig", "fünfzig",
      "sechzig", "siebzig", "achtzig", "neunzig"
    };

        private static string[] hunds =
        {
      "", "einhundert", "zweihundert", "dreihundert", "vierhundert",
      "fünfhundert", "sechshundert", "siebenhundert", "achthundert", "neunhundert"
    };

        private static WordInfo thousands = new WordInfo(false, "tausend", "tausend", "tausend");
        private static WordInfo millions = new WordInfo(false, "Million", "Millionen", "Millionen");
        private static WordInfo milliards = new WordInfo(false, "Milliarde", "Milliarden", "Milliarden");
        private static WordInfo trillions = new WordInfo(false, "Billion", "Billionen", "Billionen");

        protected override string Str1000(long value, WordInfo info, int counter)
        {
            long val = value % 1000;
            if (val == 0)
                return "";

            StringBuilder r = new StringBuilder();
            // add hundred
            string hund = GetHund(info.male, val);
            if (hund != "")
                r.Append(hund);

            val = val % 100;
            if (val < GetFixedWordsCount())
            {
                // val is less than fixed words count (usually 20), get fixed words
                string frac20 = GetFixedWords(info.male, val);
                if (frac20 != "")
                    r.Append(frac20);
            }
            else
            {
                // val is greater than fixed words count (usually 20), get tens separately
                string ten = GetTen(info.male, val / 10);
                string frac10 = GetFixedWords(info.male, val % 10);

                // decide whether to use 10-1 separator or not
                if (ten != "" && frac10 != "")
                    r.Append(frac10 + "und" + ten);
                else if (ten != "")
                    r.Append(ten);
                else if (frac10 != "")
                    r.Append(frac10);
            }

            string separator = counter == 2 ? "" : " "; // thousands do not use separator
                                                        // add currency/group word
            r.Append(separator);
            r.Append(Case(value, info));

            // make the result starting with letter and ending with space
            if (r.Length != 0)
                r.Append(separator);
            return r.ToString().TrimStart(' ');
        }


        protected override string GetFixedWords(bool male, long value)
        {
            string result = fixedWords[value];
            if (!male)
            {
                if (value == 1)
                    return "eine";
            }
            return result;
        }

        protected override string GetTen(bool male, long value)
        {
            return tens[value];
        }

        protected override string GetHund(bool male, long value)
        {
            return hunds[value / 100];
        }

        protected override WordInfo GetThousands()
        {
            return thousands;
        }

        protected override WordInfo GetMillions()
        {
            return millions;
        }

        protected override WordInfo GetMilliards()
        {
            return milliards;
        }

        protected override WordInfo GetTrillions()
        {
            return trillions;
        }

        protected override CurrencyInfo GetCurrency(string currencyName)
        {
            currencyName = currencyName.ToUpper();
            if (currencyName == "CAD")
                currencyName = "USD";
            return currencyList[currencyName];
        }

        protected override string GetZero()
        {
            return "null";
        }

        protected override string GetMinus()
        {
            return "minus";
        }

        protected override string GetDecimalSeparator()
        {
            return "und ";
        }

        static NumToWordsDe()
        {
            currencyList = new Dictionary<string, CurrencyInfo>();
            currencyList.Add("USD", new CurrencyInfo(
              new WordInfo("Dollar", "Dollar"),
              new WordInfo("Cent", "Cent")));
            currencyList.Add("EUR", new CurrencyInfo(
              new WordInfo("Euro", "Euro"),
              new WordInfo("Cent", "Cent")));
            currencyList.Add("GBP", new CurrencyInfo(
              new WordInfo("Pfund", "Pfund"),
              new WordInfo("Penny", "Penny")));
        }
    }
}