<?php
/**
*/

if (isset($_SERVER['APP_MODE']) && $_SERVER['APP_MODE'] !== 'prod') {
    ini_set('error_reporting', E_ALL);
    ini_set('show_errors', true);
    ini_set('display_errors', true);
} else {
    ini_set('error_reporting', FALSE);
    ini_set('show_errors', FALSE);
    ini_set('display_errors', FALSE);
    ini_set('log_errors', FALSE);
}

include '../langs.inc.php';

/**
 * Diff two .lang files, to get:
 * - strings count of each
 * - missing strings (in $a, not in $b)
 * - extra strings (in $b, not in $a)
 * - untranslated strings (same in $a and $b, or empty in $b)
 * - duplicate strings in $b
 *
 * @param string $a file name
 * @param string $b file name
 *
 * @return array
*/
function _lang_diff($a, $b)
{
    $fa = i18n::_lang_return($a);
    $fb = i18n::_lang_return($b, true); // option to return duplicates
    $duplicates = (isset($fb['duplicates']) ? array_pop($fb) : null);

/*    $ret = array(
        'aCount' => count($fa),
        'bCount' => count($fb),
        'diff'   => count($fa) - count($fb),
    ); unused var */
    $missing = array();
    $notrans = array();

    $ka = array_keys($fa);
    $kb = array_keys($fb);

    $missing = array_diff($ka, $kb);
    $extra   = array_diff($kb, $ka);

    // search for untranslated strings
    foreach ($fa as $k => $v) {
        if (array_key_exists($k, $fb)) {
            if ($v == $fb[$k] || '' == $fb[$k]) {
                $notrans[] = $k;
            }
        }
    }

    return array(
        'a_name'  => $a,
        'b_name'  => $b,
        'a'       => count($fa),
        'b'       => count($fb),
        'missing' => $missing,
        'notrans' => $notrans,
        'extra'   => $extra,
        'dup_str' => $duplicates,
    );
}

/**
 * Diff pot and po files, to get:
 * - source (pot) strings count
 * - missing strings in target
 * - untranslated strings in target
 * - empty array for extra and duplicate strings for backward compatibility
 *
 * @param string $locale locale name ('sl')
 * @param string $resource file name ('about/license')
 *
 * @return array
*/
function _po_diff($locale, $resource)
{
    $source_l = read_translation_file('en', $resource);
    $target_l = read_translation_file($locale, $resource);

    $pot_strings = array();
    $untrans = array();
    $missing = array();

    foreach ($source_l as $escaped_string => $subarray) {
        if (!empty($subarray["msgid"])) { // filter out header
            $pot_strings[$escaped_string] = $subarray["msgid"];
        }
    }

    foreach ($target_l as $escaped_string => $subarray) {
        if (!empty($subarray["msgid"])) { // filter out header
            $po_strings[$escaped_string] = $subarray["msgstr"][0];
        }
    }

    foreach ($pot_strings as $escaped_string => $translated_string) {
        if (isset($po_strings[$escaped_string])) {
            if (empty($po_strings[$escaped_string])) {
                $untrans[] = $escaped_string;
            }
        } else {
            $missing[] = $escaped_string;
        }
    }

    return array(
        'a'       => count($pot_strings), // # of original strings
//        'b'       => count($po_strings), // # of target strings
        'missing' => $missing,
        'notrans' => $untrans,
        'extra'   => array(),
        'dup_str' => array(),
    );
}

/*function _lang_diff_stats($a, $b)
{
    $diff = _lang_diff($a, $b);

    $diff['missing'] = count($diff['missing']);
    $diff['notrans'] = count($diff['notrans']);
    $diff['extra']   = count($diff['extra']);
    $diff['ok']      = (($diff['b'] - $diff['a']) == 0) ? true : false;
    $diff['correct'] = $diff['b'] - $diff['notrans'] - $diff['missing'];

    return $diff;
} /**/

if ( ! function_exists('glob_recursive'))
{
    // Does not support flag GLOB_BRACE

    function glob_recursive($pattern, $flags = 0)
    {
        $files = glob($pattern, $flags);

//      removing dirs from $files as they are not files ;)
        $files_wo_dirs = array();
        foreach ($files as $single_file) {
            $single_file_as_string = str_split($single_file);
            $last_sign = array_pop($single_file_as_string);
            if($last_sign != '/') {
                $files_wo_dirs[] = $single_file;
            };
        }
        $files = $files_wo_dirs;

        foreach (glob(dirname($pattern).'/*', GLOB_ONLYDIR|GLOB_NOSORT) as $dir)
        {
			$files = array_merge($files, glob_recursive($dir.'/'.basename($pattern), $flags));
        }

        return $files;
    }
}

/**
 * Create 'sl/about/license.sl.lang'
 * from 'en/about/license.en.lang'
 *
 * @param string $s file name with path
 * @param string $l locale name
 *
 * @return string
*/
function _lang_file_switch($s, $l)
{
    $s = str_replace('en.lang', $l . '.lang', $s);
    return str_replace('en/', $l . '/', $s);
}

/**
 * Create 'sl/about/license.po'
 * from 'en/about/license.pot'
 *
 * @param string $s file name with path
 * @param string $l locale name
 *
 * @return string
*/
function _po_file_switch($s, $l)
{
    if($l != 'en') {
        $s = str_replace('.pot', '.po', $s);
    }
    return str_replace('en/', $l . '/', $s);
}

/**
 * Create 'about/license'
 * from 'en/about/license.pot' or 'en/about/license.en.lang'
 *
 * @param string $source_file file name with path
 * @param string $extension file extension to remove
 *
 * @return string
*/
function _extract_resource($source_file, $extension = '.pot')
{
    $resource = str_replace($extension, '', $source_file);
    return str_replace('en/', '', $resource);
}

function get_lang_references($pattern = '*')
{
    return glob_recursive('en/' . $pattern, GLOB_MARK);
}

function get_other_langs()
{
    $ls = glob('*');
    $re = array();
    foreach ($ls as $l) {
        if (!is_dir($l)) continue;
        if ($l == 'en') continue;
        $re[] = $l;
    }
    array_unshift($re, 'en');
    return $re;
}

function aproximate_number_of_untranslated_constitution_lines($app_root, $lang, $unique_lines_in_eng_constitution = array())
{
    $constitution_readable = FALSE;
    $dest_constitution = sprintf('%s/%s/%s/%s_%s.md', $app_root, $lang, 'about/constitution', 'mageia.org_statutes', $lang);
    $number_of_unique_lines_in_eng_constitution = count($unique_lines_in_eng_constitution);
    $aproximate_number_of_untranslated_lines = 0;
    if(is_readable($dest_constitution)) {
        $unique_lines_in_constitution = array_unique(file($dest_constitution));
        $number_of_unique_lines_in_constitution = count($unique_lines_in_constitution);
        $constitution_readable = TRUE;
        if ($lang == 'en') {
            $aproximate_number_of_untranslated_lines = $number_of_unique_lines_in_constitution;
            $untranslated_lines_in_constitution      = array();
        } else {
            $untranslated_lines_in_constitution = array_intersect($unique_lines_in_eng_constitution, $unique_lines_in_constitution);
            $number_of_nonunique_lines_lang_constitution = count($untranslated_lines_in_constitution);
            $ratio = $number_of_nonunique_lines_lang_constitution / $number_of_unique_lines_in_eng_constitution;
            $limit_ratio = 0.15; // limit ratio of "allowed" untranslated lines
            if ($ratio > $limit_ratio) {
                // add aproximate number of untranslated constitution lines
                $aproximate_number_of_untranslated_lines = $number_of_nonunique_lines_lang_constitution - round($limit_ratio * $number_of_unique_lines_in_eng_constitution);
            }
        }
    } else {
        $unique_lines_in_constitution             = $unique_lines_in_eng_constitution;
        $aproximate_number_of_untranslated_lines  = $number_of_unique_lines_in_eng_constitution;
        $untranslated_lines_in_constitution       = $unique_lines_in_eng_constitution;
    }

    return array(
        'unique_lines_in_constitution'            => $unique_lines_in_constitution,
        'constitution_readable'                   => $constitution_readable,
        'untranslated_lines_in_constitution'      => $untranslated_lines_in_constitution,
        'aproximate_number_of_untranslated_lines' => $aproximate_number_of_untranslated_lines,
    );
}