<?php

namespace App\Http\Controllers;

use App\Services\SystemStatsService;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Http;

/**
 * Voller System-Statusbericht für die HUD-Diagnose-Animation.
 * Erweitert SystemStatsService um Service-Pings (Reverb, Google) + Uptime.
 */
class FoxStatusController
{
    public function __invoke(SystemStatsService $stats): JsonResponse
    {
        $base = $stats->collect();

        return response()->json([
            'system' => [
                'cpu' => $base['cpu'],
                'memory' => $base['memory'],
                'disk' => $base['disk'],
                'load' => $base['load'],
                'uptime' => $this->uptime(),
            ],
            'services' => [
                'ollama' => $base['ollama'],
                'openai' => $base['openai'],
                'reverb' => $this->reverbStatus(),
                'google_directions' => $this->googleApiStatus('directions'),
                'google_places' => $this->googleApiStatus('places'),
                'google_geocoding' => $this->googleApiStatus('geocoding'),
                'searxng' => $this->searxStatus(),
                'queue' => ['len' => $base['queue']],
            ],
            'fox' => [
                'version' => '0.9.0',
                'mode' => config('services.tts.engine', 'piper'),
                'voice' => config('services.openai.tts_voice', 'onyx'),
                'last_action' => $this->lastActionMeta(),
            ],
            'timestamp' => now()->toIso8601String(),
        ]);
    }

    protected function uptime(): array
    {
        $raw = (string) @file_get_contents('/proc/uptime');
        $secs = (float) explode(' ', trim($raw))[0];

        return [
            'seconds' => (int) $secs,
            'human' => $this->humanDuration((int) $secs),
        ];
    }

    protected function humanDuration(int $secs): string
    {
        $d = intdiv($secs, 86400);
        $h = intdiv($secs % 86400, 3600);
        $m = intdiv($secs % 3600, 60);

        return ($d ? $d.'d ' : '').($h ? $h.'h ' : '').$m.'m';
    }

    protected function reverbStatus(): array
    {
        try {
            $r = Http::timeout(2)->get('http://reverb:8080/');

            return ['online' => $r->status() < 500];
        } catch (\Throwable) {
            return ['online' => false];
        }
    }

    protected function googleApiStatus(string $api): array
    {
        $key = config('services.google.maps_key');
        if (empty($key)) {
            return ['online' => false, 'reason' => 'no_key'];
        }

        // Cache 60s damit jeder Status-Call nicht alle APIs pingt.
        return Cache::remember('fox.google.'.$api, 60, function () use ($api, $key) {
            try {
                if ($api === 'directions') {
                    $r = Http::timeout(3)->get('https://maps.googleapis.com/maps/api/directions/json', [
                        'origin' => '48.2082,16.3738', 'destination' => '48.21,16.37', 'key' => $key,
                    ]);
                    $status = $r->json('status');

                    return ['online' => $r->successful() && in_array($status, ['OK', 'ZERO_RESULTS'], true)];
                }
                if ($api === 'geocoding') {
                    $r = Http::timeout(3)->get('https://maps.googleapis.com/maps/api/geocode/json', [
                        'latlng' => '48.2082,16.3738', 'key' => $key,
                    ]);

                    return ['online' => $r->successful() && $r->json('status') === 'OK'];
                }
                if ($api === 'places') {
                    $r = Http::timeout(3)
                        ->withHeaders(['X-Goog-Api-Key' => $key, 'X-Goog-FieldMask' => 'places.id'])
                        ->post('https://places.googleapis.com/v1/places:searchText', [
                            'textQuery' => 'wien', 'maxResultCount' => 1,
                        ]);

                    return ['online' => $r->successful()];
                }

                return ['online' => false];
            } catch (\Throwable) {
                return ['online' => false];
            }
        });
    }

    protected function searxStatus(): array
    {
        try {
            $r = Http::timeout(2)->get(rtrim((string) config('services.searxng.url'), '/').'/search', [
                'q' => 'test', 'format' => 'json',
            ]);

            return ['online' => $r->status() < 500];
        } catch (\Throwable) {
            return ['online' => false];
        }
    }

    protected function lastActionMeta(): ?array
    {
        $cached = Cache::get('fox.last_pois');
        if (! is_array($cached)) {
            return null;
        }

        return [
            'type' => 'poi_search',
            'label' => $cached['label'] ?? null,
            'count' => count($cached['pois'] ?? []),
        ];
    }
}