<?php
// API: enable_show.php - Toggle Show and (if authenticated) attempt to send a "Show enabled" push.
require __DIR__ . '/../auth.php';
mvlog_require_login();

// Web-server side handler to toggle "Show" for an MVLog job and send a web-push immediately if appropriate.
// Preferred usage (POST): id=<article_id> show=1|0
// Legacy fallback (POST): job=<job_dir_name> show=1|0

$MVLOG_ROOT = dirname(__DIR__);
$id = trim((string)($_POST['id'] ?? ''));
$job = trim((string)($_POST['job'] ?? ''));
$show = isset($_POST['show']) ? filter_var($_POST['show'], FILTER_VALIDATE_BOOLEAN) : true;

function mvlog_article_id_is_valid(string $id): bool {
    return (bool)preg_match('/^[0-9]{14}[a-f0-9]{16}$/', $id);
}

function mvlog_legacy_job_is_valid(string $job): bool {
    return (bool)preg_match('/^[0-9]{8}[-_][A-Za-z0-9._-]+$/', $job);
}

function mvlog_read_article_id(string $jobdir): string {
    $path = $jobdir . '/.mvlog-id';
    if (!is_file($path)) return '';
    $id = strtolower(trim((string)@file_get_contents($path)));
    return mvlog_article_id_is_valid($id) ? $id : '';
}

function mvlog_find_jobdir_by_id(string $mvlogRoot, string $articleId): ?string {
    if (!mvlog_article_id_is_valid($articleId)) return null;

    $cacheFile = $mvlogRoot . '/cache/articles-index.json';
    if (is_file($cacheFile)) {
        $cache = json_decode((string)@file_get_contents($cacheFile), true);
        if (is_array($cache) && is_array($cache['by_id'] ?? null)) {
            $name = (string)($cache['by_id'][$articleId] ?? '');
            if ($name !== '') {
                $candidate = $mvlogRoot . '/in-dir/' . basename($name);
                if (is_dir($candidate)) return $candidate;
            }
        }
    }

    foreach (glob($mvlogRoot . '/in-dir/*', GLOB_ONLYDIR) ?: [] as $dir) {
        if (mvlog_read_article_id($dir) === $articleId) return $dir;
    }

    return null;
}

function mvlog_resolve_jobdir(string $mvlogRoot, string $id, string $job, ?string &$resolvedJob, ?string &$resolvedId): ?string {
    $resolvedJob = null;
    $resolvedId = null;

    if ($id !== '' && mvlog_article_id_is_valid($id)) {
        $dir = mvlog_find_jobdir_by_id($mvlogRoot, strtolower($id));
        if ($dir !== null) {
            $resolvedJob = basename($dir);
            $resolvedId = mvlog_read_article_id($dir);
            return $dir;
        }
    }

    if ($job !== '' && mvlog_legacy_job_is_valid($job)) {
        $dir = $mvlogRoot . '/in-dir/' . basename($job);
        if (is_dir($dir)) {
            $resolvedJob = basename($dir);
            $resolvedId = mvlog_read_article_id($dir);
            return $dir;
        }
    }

    return null;
}

$resolvedJob = null;
$resolvedId = null;
$jobdir = mvlog_resolve_jobdir($MVLOG_ROOT, strtolower($id), $job, $resolvedJob, $resolvedId);
if ($jobdir === null) {
    http_response_code(404);
    echo 'job not found';
    exit;
}

$enabled_file = "$jobdir/.movmaker-enabled";

if ($show) {
    file_put_contents($enabled_file, date(DATE_ATOM) . PHP_EOL, LOCK_EX);

    // Attempt to send push (non-fatal). Uses lib/send_push.php
    $sent = false;
    if (is_file(__DIR__ . '/../lib/send_push.php')) {
        include_once __DIR__ . '/../lib/send_push.php';
        try {
            $sent = try_send_show_notification($resolvedId ?: $resolvedJob, $jobdir, $MVLOG_ROOT, '/var/log/mvlog_notify.log');
        } catch (Throwable $e) {
            error_log("[mvlog] notify exception for " . ($resolvedId ?: $resolvedJob) . ": " . $e->getMessage() . "\n", 3, '/var/log/mvlog_notify.log');
            $sent = false;
        }
    } else {
        error_log("[mvlog] send_push helper missing, cannot send notification for " . ($resolvedId ?: $resolvedJob) . "\n", 3, '/var/log/mvlog_notify.log');
    }

    echo $sent ? 'enabled' : 'enabled (no notification)';
} else {
    @unlink($enabled_file);
    echo 'disabled';
}

exit;