"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.repairAddressMojibakeText = repairAddressMojibakeText;
exports.normalizeRussianComparableText = normalizeRussianComparableText;
const iconv_lite_1 = __importDefault(require("iconv-lite"));
function compactWhitespace(value) {
    return value.replace(/\s+/g, " ").trim();
}
function textMojibakeScore(value) {
    const source = String(value ?? "");
    const cyrillic = (source.match(/[\u0400-\u04ff]/g) ?? []).length;
    const latin = (source.match(/[A-Za-z]/g) ?? []).length;
    const replacement = (source.match(/[�]/g) ?? []).length;
    const pairMarkers = (source.match(/(?:Р.|С.|Ð.|Ñ.)/g) ?? []).length;
    const doubleEncodedMarkers = (source.match(/(?:Р“[Р-џ]|Р’[Р-џ]|Ã.|Â.)/gu) ?? []).length;
    return cyrillic + latin - replacement * 3 - pairMarkers * 2 - doubleEncodedMarkers * 2;
}
function looksLikeAddressMojibake(value) {
    const source = String(value ?? "");
    if (!source.trim()) {
        return false;
    }
    if (/[�]/.test(source)) {
        return true;
    }
    if ((source.match(/(?:Р.|С.|Ð.|Ñ.)/g) ?? []).length >= 2) {
        return true;
    }
    if ((source.match(/(?:Р“[Р-џ]|Р’[Р-џ]|Ã.|Â.)/gu) ?? []).length >= 2) {
        return true;
    }
    return false;
}
function repairAddressMojibakeText(value) {
    const source = String(value ?? "");
    if (!looksLikeAddressMojibake(source)) {
        return source;
    }
    let candidate = source;
    for (let pass = 0; pass < 3; pass += 1) {
        let improved = false;
        try {
            const fromWin1251 = iconv_lite_1.default.encode(candidate, "win1251").toString("utf8");
            if (textMojibakeScore(fromWin1251) > textMojibakeScore(candidate)) {
                candidate = fromWin1251;
                improved = true;
            }
        }
        catch {
            // Ignore decode failures and keep the current candidate.
        }
        try {
            const fromLatin1 = Buffer.from(candidate, "latin1").toString("utf8");
            if (textMojibakeScore(fromLatin1) > textMojibakeScore(candidate)) {
                candidate = fromLatin1;
                improved = true;
            }
        }
        catch {
            // Ignore decode failures and keep the current candidate.
        }
        if (!improved) {
            break;
        }
    }
    return candidate;
}
function normalizeRussianComparableText(value) {
    return compactWhitespace(repairAddressMojibakeText(String(value ?? "")).toLowerCase()).replace(/ё/g, "е");
}