<?php
declare(strict_types=1);

require_once __DIR__ . '/../includes/LegalTools.php';

dbnToolsRequireMethod('POST');
dbnToolsRequireAuth();
$ftUid = dbnToolsFreeTierCheck('redact');
$ftRemaining = dbnToolsFreeTierDeduct($ftUid, 'redact');
if ($ftRemaining >= 0) { header('X-Credits-Remaining: ' . $ftRemaining); }
$input = dbnToolsJsonInput(400000);

dbnToolsWithTelemetry('redact', '', function () use ($input): array {
    $text     = dbnToolsInjectDocContent($input, dbnToolsString($input, 'text', 128000, false));
    if (mb_strlen(trim($text), 'UTF-8') < 10) {
        dbnToolsAbort('Paste text, upload a file, or select a document before running.', 422, 'empty_text');
    }
    $mode     = (string)($input['mode']     ?? 'standard');
    $region   = dbnToolsNormalizeRegion($input['region']   ?? 'nordic');
    $language = dbnToolsNormalizeLanguage($input['language'] ?? 'en');

    $validEngines = ['azure_mini', 'azure_full', 'gpu', 'regex'];
    $engine = in_array((string)($input['engine'] ?? ''), $validEngines, true)
        ? (string)$input['engine']
        : 'azure_mini';

    $validFormats = ['contextual', 'generic', 'pseudonym'];
    $outputFormat = in_array((string)($input['output_format'] ?? ''), $validFormats, true)
        ? (string)$input['output_format']
        : 'contextual';

    $keepOfficials = (bool)($input['keep_officials'] ?? false);

    $aliases = [];
    $rawAliases = $input['aliases'] ?? [];
    if (is_array($rawAliases)) {
        foreach (array_slice($rawAliases, 0, 20) as $item) {
            if (!is_array($item)) {
                continue;
            }
            $original = substr(trim((string)($item['original'] ?? '')), 0, 100);
            $alias    = substr(trim((string)($item['alias']    ?? '')), 0, 100);
            if ($original !== '' && $alias !== '') {
                $aliases[] = ['original' => $original, 'alias' => $alias];
            }
        }
    }

    $exemptNames = [];
    $rawExempt = $input['exempt_names'] ?? [];
    if (is_array($rawExempt)) {
        foreach (array_slice($rawExempt, 0, 20) as $name) {
            $name = substr(trim((string)$name), 0, 100);
            if ($name !== '') {
                $exemptNames[] = $name;
            }
        }
    }

    $rawTypes = $input['redact_types'] ?? [];
    $redactTypes = [
        'names'  => ($rawTypes['names']  ?? true) !== false,
        'orgs'   => ($rawTypes['orgs']   ?? true) !== false,
        'places' => ($rawTypes['places'] ?? true) !== false,
        'dob'    => ($rawTypes['dob']    ?? true) !== false,
    ];

    return (new DbnLegalToolsService())->redact(
        $text, $mode, $region, $language, $aliases,
        $engine, $outputFormat, $keepOfficials, $exemptNames, $redactTypes
    );
});