<?PHP
/**
 * Controls automatic translation of times.
 *
 * @author Joshua Ramon Enslin <joshua@museum-digital.de>
 */
declare(strict_types = 1);
require_once __DIR__ . '/inc/datesByCountry.php';

/**
 * Autotranslater class for times.
 */
final class NodaTimeAutotranslater {

    const USECASE_MONTH = 1;
    const USECASE_DAY   = 2;

    const TRANSLATABLE_NOT = 0;
    const TRANSLATABLE_AS_MONTH_DAY = 1;
    const TRANSLATABLE_AS_YEAR_WITH_SUFFIX = 2;

    const LANGS_TO_LOCALES = [
        'ar' => 'ar_SY.utf8',
        'de' => 'de_DE.utf8',
        'en' => 'en_US.utf8',
        'es' => 'es_ES.utf8',
        'fa' => 'fa_IR.UTF-8',
        'fr' => 'fr_FR.utf8',
        'hu' => 'hu_HU.utf8',
        'id' => 'id_ID.utf8',
        'it' => 'it_IT.utf8',
        'ka' => 'ka_GE.UTF-8',
        'ko' => 'ko_KR.UTF-8',
        'pl' => 'pl_PL.utf8',
        'pt' => 'pt_BR.utf8',
        'ro' => 'ro_RO.UTF-8',
        'ru' => 'ru_RU.UTF-8',
        'ta' => 'ta_IN.UTF-8',
        'tl' => 'tl_PH.utf8',
        'tr' => 'tr_TR.utf8',

        // Languages that don't really need a specific locale
        'ja' => 'en_US.utf8',
        'zh' => 'en_US.utf8',
    ];

    const LANGS_SINGLE_YEAR_FORMAT = [
        'ar' => '%s',
        'de' => '%s',
        'en' => '%s',
        'es' => '%s',
        'fa' => '%s',
        'fr' => '%s',
        'hu' => '%s',
        'id' => '%s',
        'it' => '%s',
        'ka' => '%s',
        'ko' => '%s년',
        'pl' => '%s',
        'pt' => '%s',
        'ro' => '%s',
        'ru' => '%s',
        'ta' => '%s',
        'tl' => '%s',
        'tr' => '%s',

        // Languages that don't really need a specific locale
        'ja' => '%s年',
        'zh' => '%s年',
    ];

    const LANGS_YEARSPAN_FORMAT = [
        'ar' => '%s-%s',
        'de' => '%s-%s',
        'en' => '%s-%s',
        'es' => '%s-%s',
        'fa' => '%s-%s',
        'fr' => '%s-%s',
        'hu' => '%s-%s',
        'id' => '%s-%s',
        'it' => '%s-%s',
        'ka' => '%s-%s',
        'ko' => '%s년-%s년',
        'pl' => '%s-%s',
        'pt' => '%s-%s',
        'ro' => '%s-%s',
        'ru' => '%s-%s',
        'ta' => '%s-%s',
        'tl' => '%s-%s',
        'tr' => '%s-%s',

        // Languages that don't really need a specific locale
        'ja' => '%s年から%s年',
        'zh' => '%s年至%s年',
    ];

    const LANGS_TO_BCE_FORMAT = [
        'ar' => '-%s',
        'de' => '%s v. Chr.',
        'en' => '%s BC',
        'es' => '%s a.C.',
        'fa' => '-%s',
        'fr' => '%s av. J.-C.',
        'hu' => 'Kr. e. %s',
        'id' => '%s SM',
        'it' => '%s a.C.',
        'ka' => 'ძვ. წ. %s წ',
        'ko' => '기원전%s',
        'pl' => '%s pne',
        'pt' => '%s AC',
        'ro' => '%s î.Hr.',
        'ru' => '%s г. до н.э.',
        'ta' => 'கிமு %s',
        'tl' => '%s BC',
        'tr' => 'MÖ %s',

        // Languages that don't really need a specific locale
        'ja' => '紀元前%s',
        'zh' => '公元前%s',
    ];

    const LANGS_TO_CE_FORMAT = [
        'ar' => '%s',
        'de' => '%s n. Chr.',
        'en' => '%s CE',
        'es' => '%s d.C.',
        'fa' => '%s',
        'fr' => '%s ap. J.-C.',
        'hu' => '%s',
        'id' => '%s M.',
        'it' => '%s d.C.',
        'ka' => '%s წ',
        'ko' => '%s',
        'pl' => '%s n.e.',
        'pt' => '%s dC',
        'ro' => '%s',
        'ru' => '%s',
        'ta' => '%s பொ.ச.',
        'tl' => '%s AD',
        'tr' => '%s',

        // Languages that don't really need a specific locale
        'ja' => '西暦%s',
        'zh' => '%s',
    ];

    /** @var MDMysqli */
    private MDMysqli $_mysqli_noda;
    /** @var integer */
    private int $_znum;
    /** @var MDMysqliStmt */
    private MDMysqliStmt $_insertStmt;

    /**
     * Checks if a time is translatable.
     * Translatable times have either a counting time day and month or at least a month.
     *
     * @param string $zeit_beginn          Beginn year.
     * @param string $zeit_ende            End year.
     * @param string $zeit_zaehlzeit_monat Counting time month.
     *
     * @return integer
     */
    public static function check_translatability(string $zeit_beginn, string $zeit_ende, string $zeit_zaehlzeit_monat):int {

        if (intval($zeit_ende) >= 0 && intval($zeit_beginn) < 0) {
            return self::TRANSLATABLE_NOT;
        }
        if (intval($zeit_ende) < 0 && intval($zeit_beginn) < 0 || intval($zeit_ende) < 1000) {
            return self::TRANSLATABLE_AS_YEAR_WITH_SUFFIX;
        }
        // Conditions speaking against translatability.
        if (trim($zeit_zaehlzeit_monat, ", .0") === "") {
            return self::TRANSLATABLE_NOT;
        }

        return self::TRANSLATABLE_AS_MONTH_DAY;

    }

    /**
     * Translated years or timespans below 1000 CE.
     *
     * @param array<integer|string> $timeInfo Time information.
     *
     * @return void
     */
    public function translateYearsWithSuffix(array $timeInfo):void {

        $start = intval($timeInfo['zeit_beginn']);
        $end = intval($timeInfo['zeit_ende']);

        if ($start < 0 && $end < 0) {
            $suffixMode = 2; // 2; // " v. Chr.";
        }
        else if ($end < 1000) {
            $suffixMode = 1; // " n. Chr.";
        }
        else $suffixMode = 0;

        foreach (self::LANGS_TO_CE_FORMAT as $tLang => $ceFormat) {

            if ($start === $end) {
                $year = sprintf(self::LANGS_SINGLE_YEAR_FORMAT[$tLang], (string)abs($start));
            }
            else $year = sprintf(self::LANGS_YEARSPAN_FORMAT[$tLang], (string)abs($start), (string)abs($end));

            switch ($suffixMode) {
            case 0:
                $timeName = $year;
                break;
            case 1:
                $timeName = sprintf($ceFormat, $year);
                break;
            case 2:
                $timeName = sprintf(self::LANGS_TO_BCE_FORMAT[$tLang], $year);
                break;
            default:
                throw new Exception("Unknown case encountered for time translations.");
            }

            $this->_insertStmt->bind_param("iss", $this->_znum, $tLang, $timeName);
            $this->_insertStmt->execute();

        }

    }

    /**
     * Runs autotranslater.
     *
     * @param array<integer|string> $timeInfo Time information.
     *
     * @return void
     */
    public function translate(array $timeInfo):void {

        if (!($translation_type = self::check_translatability((string)$timeInfo['zeit_beginn'], (string)$timeInfo['zeit_ende'], (string)$timeInfo['zeit_zaehlzeit_monat']))) {
            throw new MDgenericInvalidInputsException("Non-translatable date");
        }

        if ($translation_type === self::TRANSLATABLE_AS_YEAR_WITH_SUFFIX) {
            $this->translateYearsWithSuffix($timeInfo);
            return;
        }

        if (trim((string)$timeInfo['zeit_zaehlzeit_tag'], ", .0") === "") {
            $dateStr = "{$timeInfo['zeit_zaehlzeit_jahr']}-{$timeInfo['zeit_zaehlzeit_monat']}-05 00:00:01";
            $usecase = self::USECASE_MONTH;
        }
        else {
            $dateStr = "{$timeInfo['zeit_zaehlzeit_jahr']}-{$timeInfo['zeit_zaehlzeit_monat']}-{$timeInfo['zeit_zaehlzeit_tag']} 00:00:01";
            $usecase = self::USECASE_DAY;
        }

        $dateGeneral = strtotime($dateStr);

        foreach (self::LANGS_TO_LOCALES as $tLang => $locale) {

            setlocale(LC_TIME, $locale);
            if ($locale !== setlocale(LC_TIME, "0")) continue;
            if ($usecase === self::USECASE_MONTH)    $tLangValue = strftime(getMonthFormatByLang($tLang), $dateGeneral ?: 0);
            else { # if ($usecase === self::USECASE_DAY)
                $tLangValue = strftime(getDateFormatByLang($tLang), $dateGeneral ?: 0);
            }

            $this->_insertStmt->bind_param("iss", $this->_znum, $tLang, $tLangValue);
            $this->_insertStmt->execute();

        }

    }

    /**
     * Constructor.
     *
     * @param MDMysqli $mysqli_noda Database connection.
     * @param integer  $znum        Time ID.
     *
     * @return void
     */
    public function __construct(MDMysqli $mysqli_noda, int $znum) {

        $this->_mysqli_noda = $mysqli_noda;
        $this->_znum = $znum;

        $this->_insertStmt = $mysqli_noda->do_prepare("INSERT INTO `zeit_translation`
            (`zeit_id`, `trans_language`, `trans_name`)
            VALUES
            (?, ?, ?)");

    }

    /**
     * Destructor.
     *
     * @return void
     */
    public function __destruct() {

        $this->_insertStmt->close();

    }

}