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#include <vector>
#include <string>
#include <fstream>
#include <iostream>

#include "expose.h"

std::vector<std::string> rwkv_vocab;
std::vector<std::string> special = {"Ā","ā","Ă","ă","Ą","ą","Ć","ć","Ĉ","ĉ","Ċ","ċ","Č","č","Ď","ď","Đ","đ","Ē","ē","Ĕ","ĕ","Ė","ė","Ę","ę","Ě","ě","Ĝ","ĝ","Ğ","ğ","Ġ","!","\"","#","$","%","&","\'","(",")","*","+",",","-",".","/","0","1","2","3","4","5","6","7","8","9",":",";","<","=",">","?","@","A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","[","\\","]","^","_","`","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","{","|","}","~","ġ","Ģ","ģ","Ĥ","ĥ","Ħ","ħ","Ĩ","ĩ","Ī","ī","Ĭ","ĭ","Į","į","İ","ı","IJ","ij","Ĵ","ĵ","Ķ","ķ","ĸ","Ĺ","ĺ","Ļ","ļ","Ľ","ľ","Ŀ","ŀ","Ł","ł","¡","¢","£","¤","¥","¦","§","¨","©","ª","«","¬","Ń","®","¯","°","±","²","³","´","µ","¶","·","¸","¹","º","»","¼","½","¾","¿","À","Á","Â","Ã","Ä","Å","Æ","Ç","È","É","Ê","Ë","Ì","Í","Î","Ï","Ð","Ñ","Ò","Ó","Ô","Õ","Ö","×","Ø","Ù","Ú","Û","Ü","Ý","Þ","ß","à","á","â","ã","ä","å","æ","ç","è","é","ê","ë","ì","í","î","ï","ð","ñ","ò","ó","ô","õ","ö","÷","ø","ù","ú","û","ü","ý","þ","ÿ"};

static void replaceAll(std::string& str, const std::string& from, const std::string& to) {
    if(from.empty())
        return;
    size_t start_pos = 0;
    while((start_pos = str.find(from, start_pos)) != std::string::npos) {
        str.replace(start_pos, from.length(), to);
        start_pos += to.length(); // In case 'to' contains 'from', like replacing 'x' with 'yx'
    }
}

static std::string hexToUnicode(const std::string& hexString) {
    std::string unicodeString;
    for (size_t i = 0; i < hexString.length(); i += 2) {
        std::string byteString = hexString.substr(i, 2);
        unsigned int byteValue = std::stoi(byteString, nullptr, 16);
        unicodeString += static_cast<char>(byteValue);
    }
    return unicodeString;
}

void read_rwkv_vocab()
{
    std::string line;
    auto filepath = executable_path+ "rwkv_vocab.embd";
    printf("\nReading vocab from %s",filepath.c_str());
    std::ifstream myfile(filepath);
    if (myfile.is_open())
    {
        int slen = special.size();
        while (myfile.good())
        {
            getline(myfile, line);
            for(int i=0;i<slen;++i)
            {
                std::string swapped = "";
                swapped.push_back((char)i);
                replaceAll(line,special[i],swapped);
            }
            rwkv_vocab.push_back(line);
        }
        myfile.close();
    }

    else
    {
        std::cout << "Unable to open RWKV vocab file";
    }
}

void read_rwkv_world_vocab() //its in hexadecimal
{
    std::string line;
    std::string unicodeString;
    auto filepath = executable_path+ "rwkv_world_vocab.embd";
    printf("\nReading world vocab from %s",filepath.c_str());
    std::ifstream myfile(filepath);
    if (myfile.is_open())
    {
        int slen = special.size();
        int idx = 0;
        rwkv_vocab.push_back("<<UNUSED_TOKEN>>");
        while (myfile.good())
        {
            getline(myfile, line);
            unicodeString = hexToUnicode(line);
            // printf("\n%d: %s",idx,unicodeString.c_str());
            rwkv_vocab.push_back(unicodeString);
            ++idx;
        }
        myfile.close();
    }

    else
    {
        std::cout << "Unable to open RWKV world vocab file";
    }
}