<?php

namespace App\Services;

use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Redis;

/**
 * Host/infrastructure health probes. Used by the Host page (full detail) and by the
 * Dashboard (only to raise a warning when a service is down — the home view itself
 * never shows server internals).
 */
class SystemHealth
{
    /** @return array<int, array{key:string,label:string,icon:string,state:string,detail:string}> */
    public function services(): array
    {
        return [
            $this->database(),
            $this->redis(),
            $this->reverb(),
            $this->horizon(),
        ];
    }

    /** True when every probed service is online. */
    public function allOnline(): bool
    {
        return ! collect($this->services())->contains(fn ($s) => $s['state'] !== 'online');
    }

    protected function database(): array
    {
        $base = ['key' => 'database', 'label' => __('host.svc_database'), 'icon' => 'network'];

        try {
            $start = microtime(true);
            DB::connection()->select('select 1');

            return $base + ['state' => 'online', 'detail' => (int) round((microtime(true) - $start) * 1000).' ms'];
        } catch (\Throwable) {
            return $base + ['state' => 'offline', 'detail' => __('host.svc_unreachable')];
        }
    }

    protected function redis(): array
    {
        $base = ['key' => 'cache', 'label' => __('host.svc_cache'), 'icon' => 'devices'];

        try {
            $start = microtime(true);
            Redis::connection()->ping();

            return $base + ['state' => 'online', 'detail' => (int) round((microtime(true) - $start) * 1000).' ms'];
        } catch (\Throwable) {
            return $base + ['state' => 'offline', 'detail' => __('host.svc_unreachable')];
        }
    }

    protected function reverb(): array
    {
        $base = ['key' => 'realtime', 'label' => __('host.svc_realtime'), 'icon' => 'activity'];

        $host = config('broadcasting.connections.reverb.options.host', 'reverb');
        $port = (int) config('broadcasting.connections.reverb.options.port', 8080);

        $conn = @fsockopen($host, $port, $errno, $errstr, 1.0);
        if ($conn) {
            fclose($conn);

            return $base + ['state' => 'online', 'detail' => $host.':'.$port];
        }

        return $base + ['state' => 'offline', 'detail' => __('host.svc_unreachable')];
    }

    protected function horizon(): array
    {
        $base = ['key' => 'queue', 'label' => __('host.svc_queue'), 'icon' => 'automation'];

        try {
            $masters = app(\Laravel\Horizon\Contracts\MasterSupervisorRepository::class)->all();

            if (empty($masters)) {
                return $base + ['state' => 'offline', 'detail' => __('host.svc_stopped')];
            }

            $running = collect($masters)->contains(fn ($m) => ($m->status ?? null) === 'running');

            return $base + ($running
                ? ['state' => 'online', 'detail' => __('host.svc_running')]
                : ['state' => 'warning', 'detail' => __('host.svc_stopped')]);
        } catch (\Throwable) {
            return $base + ['state' => 'offline', 'detail' => __('host.svc_unreachable')];
        }
    }
}