<?php

declare(strict_types=1);

namespace App\Controllers\Admin;

/**
 * System health: binaries, storage, queue depth, worker heartbeat.
 * Workers touch the heartbeat cache key every pass (see supervisor config).
 */
final class SystemAdmin extends AdminBase
{
    public function index(): string
    {
        $site = config('Site');

        $binaries = [];
        foreach ($site->binaries as $name => $path) {
            $binaries[$name] = [
                'path' => $path,
                'ok'   => $path !== '' && is_executable($path),
            ];
        }

        return $this->render('system_index', [
            'phpVersion'   => PHP_VERSION,
            'ciVersion'    => \CodeIgniter\CodeIgniter::CI_VERSION,
            'environment'  => ENVIRONMENT,
            'dbOk'         => $this->checkDb(),
            'diskFreeMb'   => (int) round(disk_free_space(WRITEPATH) / 1048576),
            'storageFiles' => count(glob(\App\Libraries\Pipeline::storageDir() . '/*') ?: []),
            'incoming'     => count(glob(\App\Libraries\Pipeline::incomingDir() . '/*') ?: []),
            'workerBeat'   => cache()->get('tv_worker_heartbeat'),
            'ytDlpEnabled' => service('pipeline')->youtubeEnabled(),
            'retentionHrs' => $site->retentionHours,
            'maxUploadMb'  => $site->maxUploadMb,
        ] + ['binaries' => $binaries]);
    }

    private function checkDb(): bool
    {
        try {
            db_connect()->query('SELECT 1');

            return true;
        } catch (\Throwable) {
            return false;
        }
    }
}