<?php

namespace App\Services;

use App\Enums\DataSource;
use App\Enums\WorkDayType;
use App\Models\WorkCalendar;
use Illuminate\Support\Carbon;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;

class WorkCalendarService extends ServiceBase
{
    /**
     * Szinkronizálja a munkaszüneti napokat a szunetnapok.hu API-ból.
     */
    public function syncFromApi(?int $year = null): bool
    {
        $year ??= now()->year;
        $config = config('services.szunetnapok');
        $apiKey = $config['key'] ?? null;
        $apiUrl = rtrim($config['url'] ?? 'https://szunetnapok.hu/api/', '/');
        $verify = $config['verify'] ?? true;

        Log::channel('work_calendar')->info('WorkCalendar sync started.', [
            'year' => $year,
            'api_url' => $apiUrl,
            'has_api_key' => !empty($apiKey),
            'ssl_verify' => $verify,
        ]);

        if (empty($apiKey)) {
            $this->error->add('api', 'Hiányzó szunetnapok.hu API kulcs.');
            Log::channel('work_calendar')->error('WorkCalendar sync failed: Missing API key.');
            return false;
        }

        try {
            $response = Http::withOptions(['verify' => $verify])
                ->get("{$apiUrl}/{$apiKey}/{$year}/json");

            Log::channel('work_calendar')->info('WorkCalendar API response.', [
                'status' => $response->status(),
                'body' => $response->body(),
            ]);

            if ($response->failed()) {
                $this->error->add('api', 'Nem sikerült elérni a szunetnapok.hu API-t.');
                return false;
            }
        } catch (\Exception $e) {
            $this->error->add('api', 'Hálózati hiba az API hívás közben: ' . $e->getMessage());
            Log::channel('work_calendar')->error('WorkCalendar sync API error (cURL/SSL):', [
                'message' => $e->getMessage(),
                'exception' => get_class($e),
            ]);
            return false;
        }

        $data = $response->json();

        if (($data['response'] ?? '') !== 'OK') {
            $this->error->add('api', $data['message'] ?? 'Hibás válasz az API-tól.');
            return false;
        }

        if (!isset($data['days']) || !is_array($data['days'])) {
            Log::channel('work_calendar')->info('WorkCalendar sync: No days to process.');
            return true;
        }

        $savedRecords = [];

        foreach ($data['days'] as $day) {
            $type = ($day['type'] == 1) ? WorkDayType::Holiday : WorkDayType::WorkingDay;

            $record = WorkCalendar::updateOrCreate(
                ['date' => $day['date']],
                [
                    'type' => $type,
                    'description' => $day['name'] ?? '',
                    'data_source' => DataSource::Api,
                ]
            );

            $savedRecords[] = $record->toArray();
        }

        Log::channel('work_calendar')->info('WorkCalendar sync completed.', [
            'count' => count($savedRecords),
            'records' => $savedRecords,
        ]);

        return true;
    }

    /**
     * Megállapítja, hogy az adott nap munkanap-e.
     */
    public function isWorkDay(Carbon $date): bool
    {
        $record = WorkCalendar::where('date', $date->toDateString())->first();

        if ($record) {
            return $record->type === WorkDayType::WorkingDay;
        }

        // Ha nincs az adatbázisban, a hétvégék alapján döntünk
        return !$date->isWeekend();
    }

    /**
     * Kiszámítja a következő érvényes munkanapot.
     */
    public function getNextWorkDay(Carbon $date): Carbon
    {
        $nextDay = $date->copy()->addDay();

        while (!$this->isWorkDay($nextDay)) {
            $nextDay->addDay();
        }

        return $nextDay;
    }

    /**
     * Visszaadja a megadott időszak munkaszüneti napjait és plusz munkanapjait.
     */
    public function getCalendarEntries(Carbon $start, Carbon $end): Collection
    {
        return WorkCalendar::whereBetween('date', [$start->toDateString(), $end->toDateString()])
            ->orderBy('date')
            ->get();
    }
}