function transliterate(text) {
    const transliterationMap = {
         // lower case
         'a' : 'а',
         'b' : 'б',
         'c' : 'к',
         'd' : 'д',
         'e' : 'е',
         'f' : 'ф',
         'g' : 'г',
         'h' : 'х',
         'i' : 'и',
         'j' : 'дж',
         'k' : 'к',
         'l' : 'л',
         'm' : 'м',
         'n' : 'н',
         'o' : 'о',
         'p' : 'п',
         'q' : 'к',
         'r' : 'р',
         's' : 'с',
         't' : 'т',
         'u': ['у', 'ю'],
         'v' : 'в',
         'w' : 'в',
         'x' : 'екс',
         'y' : 'и',
         'z' : 'з',

         // upper case
         'A' : 'А',
         'B' : 'Б',
         'C' : 'К',
         'D' : 'Д',
         'E' : 'Е',
         'F' : 'Ф',
         'G' : 'Г',
         'H' : 'Х',
         'I' : 'И',
         'J' : 'ДЖ',
         'K' : 'К',
         'L' : 'Л',
         'M' : 'М',
         'N' : 'Н',
         'O' : 'О',
         'P' : 'П',
         'Q' : 'К',
         'R' : 'Р',
         'S' : 'С',
         'T' : 'Т',
         'U': ['У', 'Ю'],
         'V' : 'В',
         'W' : 'В',
         'X' : 'ЕКС',
         'Y' : 'И',
         'Z' : 'З',
    };

    text = text.replace(/ия\b/g, "ia")
    .replace(/Ия\b/g, "Ia")
    .replace(/иЯ\b/g, "iA")
    .replace(/ИЯ\b/g, "IA");
    const transliteratedText = text.split('').map(letter => {
        if (transliterationMap[letter]) {
            if (Array.isArray(transliterationMap[letter])) {
                return transliterationMap[letter].join('/');
            } else {
                return transliterationMap[letter];
            }
        } else {
            return letter;
        }
    }).join('');


    return transliteratedText.replace(/\//g, ' / ');
}

// Event listeners
buttonCalculate.onclick = (e) => {
    e.preventDefault();
    separateWords();
    modal.style.display = "block";
    modal.style.opacity = "1";
};

buttonClean.onclick = (e) => {
    e.preventDefault();
    cleanAll();
};

buttonFilter.onclick = (e) => {
    e.preventDefault();
    displayResults();

};

const cleanAll = () => {
    result.innerHTML = "";
    inputName.value = "";
    errorDiv.innerText = "";
    modal.style.display = "none";
    filterNumberInput.value = "";
    allResults = [];
};

const separateWords = () => {
    const words = inputName.value.toLowerCase().split(' ');
    if (words.length === 0 || inputName.value === "") {
        errorDiv.innerText = "Please, write your name.";
        return;
    }
    allResults = [];
    words.forEach(word => {
        if (word !== "") {
            calculateWordNumerology(word);
        }
    });
    displayResults();
};

const calculateWordNumerology = (word) => {
    let sum = word.split('').map(letter => lettersToNumbers[letter] || 0).reduce((acc, curr) => acc + curr, 0);
    let destinyNumber = reduceNumber(sum);
    allResults.push({ word, destinyNumber });
};
const calculateNumerology = (word) => {
    let sum = word.split('').map(letter => lettersToNumbers[letter.toLowerCase()] || 0).reduce((acc, curr) => acc + curr, 0);
    return reduceNumber(sum);
};
const reduceNumber = (number) => {
    while (number > 9) {
        number = number.toString().split('').reduce((acc, digit) => acc + parseInt(digit, 10), 0);
    }
    return number;
};