<?php

/**
 * Generates the json files stored in resources/number_format.
 */

set_time_limit(0);
require __DIR__ . '/../vendor/autoload.php';

// Downloaded from https://github.com/unicode-cldr/cldr-localenames-full.git
$localeDirectory = __DIR__ . '/assets/cldr-localenames-full/main/';
$enLanguages = $localeDirectory . 'en/languages.json';
// Downloaded from https://github.com/unicode-cldr/cldr-numbers-full.git
$numbersDirectory = __DIR__ . '/assets/cldr-numbers-full/main/';

if (!is_dir($localeDirectory)) {
    die("The $localeDirectory directory was not found");
}
if (!is_dir($numbersDirectory)) {
    die("The $numbersDirectory directory was not found");
}
if (!file_exists($enLanguages)) {
    die("The $enLanguages file was not found");
}

$numberFormats = generate_number_formats();
$numberFormats = filter_duplicates($numberFormats);
// We treat 'en' as a generic definition, which allows
// us to strip any data that matches one of its keys.
foreach ($numberFormats as $locale => $numberFormat) {
    if ($locale != 'en') {
        $numberFormats[$locale] = array_diff_assoc($numberFormats[$locale], $numberFormats['en']);
    }
}

// Number formats are stored in PHP, then manually
// transferred to NumberFormatRepository.
$data = "<?php\n\n";
$data .= export_number_formats($numberFormats);
file_put_contents(__DIR__ . '/number_formats.php', $data);

echo "Done.\n";

/**
 * Exports number formats.
 */
function export_number_formats(array $numberFormats)
{
    $indent = '    ';
    $export = '// ' . count($numberFormats) . " available formats: \n";
    $export .= '$numberFormats = [' . "\n";
    foreach ($numberFormats as $locale => $numberFormat) {
        $locale = "'" . $locale . "'";
        $export .= $indent . $locale . " => [\n";
        foreach ($numberFormat as $key => $value) {
            $key = "'" . $key . "'";
            $value = "'" . $value . "'";
            $export .= $indent . $indent . $key . ' => ' . $value . ",\n";
        }
        $export .= "$indent],\n";
    }
    $export .= '];' . "\n\n";
    $export = str_replace("[\n$indent],", '[],', $export);

    return $export;
}

/**
 * Generates the number formats.
 */
function generate_number_formats()
{
    global $numbersDirectory;

    $numberFormats = [];
    foreach (discover_locales() as $locale) {
        $data = json_decode(file_get_contents($numbersDirectory . $locale . '/numbers.json'), true);
        $data = $data['main'][$locale]['numbers'];
        // Use the default numbering system, if it's supported.
        if (in_array($data['defaultNumberingSystem'], ['arab', 'arabext', 'beng', 'deva', 'latn'])) {
            $numberingSystem = $data['defaultNumberingSystem'];
        } else {
            $numberingSystem = 'latn';
        }

        $patterns = [
            'decimal' => $data['decimalFormats-numberSystem-' . $numberingSystem]['standard'],
            'percent' =>  $data['percentFormats-numberSystem-' . $numberingSystem]['standard'],
            'currency' => $data['currencyFormats-numberSystem-' . $numberingSystem]['standard'],
            'accounting' => $data['currencyFormats-numberSystem-' . $numberingSystem]['accounting'],
        ];
        // The "bg" patterns have no '#', confusing the formatter.
        foreach ($patterns as $key => $pattern) {
            if (strpos($pattern, '#') === false) {
                $patterns[$key] = str_replace('0.00', '#0.00', $pattern);
            }
        }

        $numberFormats[$locale] = [
            'numbering_system' => $numberingSystem,
            'decimal_pattern' => $patterns['decimal'],
            'percent_pattern' => $patterns['percent'],
            'currency_pattern' => $patterns['currency'],
            'accounting_currency_pattern' => $patterns['accounting'],
        ];
        // No need to export 'latn' since that is the default value.
        if ($numberFormats[$locale]['numbering_system'] != 'latn') {
            $numberFormats[$locale]['numbering_system'] = $numberingSystem;
        }

        // Add the symbols only if they're different from the default data.
        $decimalSeparator = $data['symbols-numberSystem-' . $numberingSystem]['decimal'];
        $groupingSeparator = $data['symbols-numberSystem-' . $numberingSystem]['group'];
        $plusSign = $data['symbols-numberSystem-' . $numberingSystem]['plusSign'];
        $minusSign = $data['symbols-numberSystem-' . $numberingSystem]['minusSign'];
        $percentSign = $data['symbols-numberSystem-' . $numberingSystem]['percentSign'];
        if ($decimalSeparator != '.') {
            $numberFormats[$locale]['decimal_separator'] = $decimalSeparator;
        }
        if ($groupingSeparator != ',') {
            $numberFormats[$locale]['grouping_separator'] = $groupingSeparator;
        }
        if ($plusSign != '+') {
            $numberFormats[$locale]['plus_sign'] = $plusSign;
        }
        if ($minusSign != '-') {
            $numberFormats[$locale]['minus_sign'] = $minusSign;
        }
        if ($percentSign != '%') {
            $numberFormats[$locale]['percent_sign'] = $percentSign;
        }
    }
    ksort($numberFormats);

    return $numberFormats;
}

/**
 * Filters out duplicate number formats (same as their parent locale).
 *
 * For example, "fr-FR" will be removed if "fr" has the same data.
 */
function filter_duplicates(array $numberFormats)
{
    $duplicates = [];
    foreach ($numberFormats as $locale => $numberFormat) {
        $parentNumberFormat = [];
        $parentLocale = \CommerceGuys\Intl\Locale::getParent($locale);
        if ($parentLocale && isset($numberFormats[$parentLocale])) {
            $parentNumberFormat = $numberFormats[$parentLocale];
        }

        $diff = array_diff_assoc($numberFormat, $parentNumberFormat);
        if (empty($diff)) {
            // The duplicates are not removed right away because they might
            // still be needed for other duplicate checks (for example,
            // when there are locales like bs-Latn-BA, bs-Latn, bs).
            $duplicates[] = $locale;
        }
    }
    // Remove the duplicates.
    foreach ($duplicates as $locale) {
        unset($numberFormats[$locale]);
    }

    return $numberFormats;
}

/**
 * Creates a list of available locales.
 */
function discover_locales()
{
    global $localeDirectory;

    // Locales listed without a "-" match all variants.
    // Locales listed with a "-" match only those exact ones.
    $ignoredLocales = [
        // Interlingua is a made up language.
        'ia',
        // Ignored by other generation scripts, very minor locales.
        'as', 'asa', 'bem', 'ccp', 'chr', 'dav', 'dua', 'ebu', 'ewo', 'guz', 'gv', 'ii',
        'jgo', 'jmc', 'kam', 'kde', 'ki', 'kkj', 'kl', 'kln', 'ksb', 'kw', 'lag',
        'ln', 'mer', 'mgo', 'nd', 'nmg', 'nnh', 'nus', 'os', 'ps', 'rwk', 'sah',
        'saq', 'sbp', 'shi', 'sn', 'teo', 'vai', 'vun', 'xog', 'zgh',
        // Special "grouping" locales.
        'root', 'en-US-POSIX',
    ];

    // Gather available locales.
    $locales = [];
    if ($handle = opendir($localeDirectory)) {
        while (false !== ($entry = readdir($handle))) {
            if (substr($entry, 0, 1) != '.') {
                $entryParts = explode('-', $entry);
                if (!in_array($entry, $ignoredLocales) && !in_array($entryParts[0], $ignoredLocales)) {
                    $locales[] = $entry;
                }
            }
        }
        closedir($handle);
    }

    return $locales;
}