RegionUtil.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PDTools.Utils;

public static class RegionUtil
{
    public static Dictionary<int, Region> _initialRegionMap = new()
    {
        {0, new Region("ABCDEFGHIJKLMNOPRSTVW", "UZ", 2,
            ["US", "US", "US", "GB", "GB", "GB", "CA", "CA", "IT", "BR", "SG"]) },

        {99, new Region("ABCDEFGHIJKLMNOPRSTVW", "UZ", 2,
            ["US", "US", "US", "GB", "GB", "GB", "CA", "CA", "IT", "BR", "SG"]) },

        {1, new Region("AKSJTNHMYRD", "IIUUEEEEOOGGGGCCCCFFFFBBBBZZZZWWWWP", 2,
            ["JP", "JP", "JP", "JP", "JP", "JP", "JP", "JP", "JP", "JP", "JP", "JP", "US", "BR"]) },

        {2, new Region("ABCDEFGLMPRSTUV", "HIIJJNNOO", 2,
            ["IT", "IT", "IT", "IT", "IT", "IT", "IT", "IT", "IT", "IT", "IT", "US"]) },

        {3, new Region("ABCDEFGHJKLMNOPRSTUW", "IU", 2,
            ["DE", "DE", "DE", "DE", "DE", "DE", "DE", "DE", "DE", "DE", "DE", "AT", "AT"]) },

        {4, new Region("ABCDEFGHJLMOPRSTV", "INNNUUXYY", 2,
            ["FR", "FR", "FR", "FR", "FR", "FR", "FR", "FR", "FR", "BE"]) },

        {5, new Region("ABCDEFGHIJLMNOPRSTUV", "QWXZ", 2,
            ["ES", "ES", "ES", "ES", "ES", "ES","BR","BR","BR","BR","MX","MX","MX","AR","AR","CO","CO","CO","PE"]) },

        {6, new Region("AEFHIJKLMNOPRSTUV", "DY", 2,
            ["FI", "FI", "FI", "FI", "NO"]) },

        {7, new Region("ABCDEFGHIJKLMNOPRSTUVWY", "UZ", 2,  // Copied from 0
            ["SE", "SE"]) },

        {8, new Region("ABCDEFGHIJKLMNOPRSTVW", "UZ", 2, // Copied from 0
            ["NO"]) },

        {9, new Region("ABCDEFGHIJKLMNOPRSTVW", "UZ", 2, // Copied from 0
            ["NL"]) },

        {10, new Region("ABCDEFGHIJKLMNOPRSTVW", "UZ", 2, // Copied from 0
            ["DK"]) },

        {11, new Region("ACDEGHIJLMNOPRST", "UXZ", 2,
            ["GR", "GR", "GR", "GR", "GR", "TR", "CY"]) },

        {12, new Region("ABCDEFGHIJKLMNOPRSTVW", "UZ", 2, // Copied from 0
            ["BE"]) },

        {13, new Region("AVGDEILMNPRS", "BZKOTFEY", 2,
            ["RU", "RU", "RU", "RU", "RU", "RU", "UA"]) },

        {14, new Region("ABCDEFGHIJKLMNOPRSTVW", "UZ", 2,  // Copied from 0
            ["HU"]) },

        {15, new Region("ABCDEFGHJKLMNOPQRSTWXYZ", "ABCDEFGHJKLMNOPQRSTWXYZ", 2,
            ["HK", "HK", "TW", "TW", "US", "US"]) },

        {16, new Region("ABCDEGHIJKMNOPRSTWY", "ABCDEGHIJKMNOPRSTWY", 2,
            ["KR", "KR", "KR", "US"]) },

        {17, new Region("ABCDEFGHIJKLMNOPRSTVW", "UZ", 2, // Copied from 0
            ["SG"]) },

        {18, new Region("ABCDEFGHJKLMNOPQRSTWXYZ", "ABCDEFGHJKLMNOPQRSTWXYZ", 2,  // Copied from 15
            ["HK", "HK", "TW", "TW", "US", "US"]) },

        {19, new Region("ABCDEFGHIJKLMNOPRSTVW", "UZ", 2, // Copied from 0
            ["IE"]) },

        {20, new Region("ABCDEFGHIJKLMNOPRSTVW", "UZ", 2, // Copied from 0
            ["AT"]) },

        {21, new Region("ABCDEFGHIJKLMNOPRSTVW", "UZ", 2, // Copied from 0
            ["PT"]) },

        {22, new Region("ABCDEFGHIJKLMNOPRSTVW", "UZ", 2, // Copied from 0
            ["PL"]) },

        {23, new Region("ABCDEFGHIJKLMNOPRSTUVYZ", "ABCDEFGHIJKLMNOPRSTUVYZ", 2,
            ["TR", "TR", "US"]) },
    };

    public static (char initial, string country) GetRandomInitial(Random random, int code)
    {
        Region region = _initialRegionMap[code];

        /* VARIABLE_PUSH: rare_ratio, Value=6
         * VARIABLE_EVAL: tbl, ValueEval=4
         * ATTRIBUTE_EVAL: size
         * BINARY_ASSIGN_OPERATOR: * (__mul__) */
        int maxR = region.RareRatio * region.Table.Length;

        /* VARIABLE_EVAL: pdistd,MRandom,GetValue,pdistd::MRandom::GetValue
           INT_CONST: 0 (0x00)
            VARIABLE_EVAL: rare_ratio, ValueEval=6
            CALL: Value=2 */
        var r = random.Next(0, maxR);

        char initial;
        // INT_CONST: 0 (0x00)
        // BINARY_OPERATOR: == (__eq__)
        if (r == 0)
        {
            /* VARIABLE_EVAL: tbl_rare, ValueEval=5
             * VARIABLE_EVAL: pdistd,MRandom,GetValue,pdistd::MRandom::GetValue
             * INT_CONST: 0
             * VARIABLE_EVAL: tbl_rare
             * ATTRIBUTE_EVAL: size
             * CALL: Value=2 */
            initial = region.RareTable[random.Next(0, region.RareTable.Length)];
        }
        else
        {
            /* VARIABLE_EVAL: tbl, ValueEval=5
             * VARIABLE_EVAL: pdistd,MRandom,GetValue,pdistd::MRandom::GetValue
             * INT_CONST: 0
             * VARIABLE_EVAL: tbl
             * ATTRIBUTE_EVAL: size
             * CALL: Value=2 */
            initial = region.Table[random.Next(0, region.Table.Length)];
        }

        /* VARIABLE_EVAL: pdistd,MRandom,GetValue,pdistd::MRandom::GetValue
         * INT_CONST: 0 (0x00)
         * VARIABLE_EVAL: countries
         * ATTRIBUTE_EVAL: size
         * CALL: Value=2 */
        string country = region.Countries[random.Next(0, region.Countries.Length)];
        return (initial, country);
    }
}

public class Region
{
    public string Table;
    public string RareTable;
    public int RareRatio;
    public string[] Countries;

    public Region(string tbl, string tbl_rare, int ratio, string[] countries)
    {
        Table = tbl;
        RareTable = tbl_rare;
        RareRatio = ratio;
        Countries = countries;
    }
}