<?php
namespace admin\Controllers;

use Domain\Languages\LanguagesRepository;
use Domain\Settings\SettingsRepository;
use admin\ViewModels\Forms\FormEditViewModel;
use admin\ViewModels\Forms\FormField;
use admin\ViewModels\Forms\FormTab;
use admin\ViewModels\Forms\FormAction;
use admin\Support\Forms\FormRequestHandler;

/**
 * Kontroler ustawien w panelu administratora.
 */
class SettingsController
{
    private SettingsRepository $settingsRepository;
    private LanguagesRepository $languagesRepository;
    private FormRequestHandler $formHandler;

    public function __construct(SettingsRepository $settingsRepository, LanguagesRepository $languagesRepository)
    {
        $this->settingsRepository = $settingsRepository;
        $this->languagesRepository = $languagesRepository;
        $this->formHandler = new FormRequestHandler();
    }

    /**
     * Czyszczenie cache.
     */
    public function clearCache(): void
    {
        \S::delete_dir('../temp/');
        \S::delete_dir('../thumbs/');

        $redis = \RedisConnection::getInstance()->getConnection();
        if ($redis) {
            $redis->flushAll();
        }

        \S::alert('Cache został wyczyszczony.');
        \S::htacces();

        header('Location: /admin/dashboard/main_view/');
        exit;
    }

    /**
     * Czyszczenie cache (AJAX).
     */
    public function clearCacheAjax(): void
    {
        try {
            \S::delete_dir('../temp/');
            \S::delete_dir('../thumbs/');

            $redis = \RedisConnection::getInstance()->getConnection();
            if ($redis) {
                $redis->flushAll();
            }

            \S::htacces();

            echo json_encode(['status' => 'success', 'message' => 'Cache został wyczyszczony.']);
        } catch (\Exception $e) {
            echo json_encode(['status' => 'error', 'message' => 'Błąd podczas czyszczenia cache: ' . $e->getMessage()]);
        }
        exit;
    }

    /**
     * Zapis ustawien (AJAX).
     */
    public function save(): void
    {
        // Kompatybilnosc wsteczna dla legacy gridEdit (values jako JSON).
        $legacyValues = \S::get('values');
        if ($legacyValues) {
            $values = json_decode($legacyValues, true);
            $result = $this->settingsRepository->saveSettings(is_array($values) ? $values : []);

            \S::delete_dir('../temp/');
            \S::htacces();

            echo json_encode($result);
            exit;
        }

        $languages = $this->languagesRepository->languagesList();
        $settings = $this->settingsRepository->getSettings();
        $viewModel = $this->buildFormViewModel($settings, $languages);

        $result = $this->formHandler->handleSubmit($viewModel, $_POST);
        if (!$result['success']) {
            $_SESSION['form_errors'][$this->getFormId()] = $result['errors'];
            echo json_encode(['success' => false, 'errors' => $result['errors']]);
            exit;
        }

        $values = $this->transformFormDataToSettings($result['data']);
        $saveResult = $this->settingsRepository->saveSettings($values);

        \S::delete_dir('../temp/');
        \S::htacces();

        echo json_encode([
            'success' => ($saveResult['status'] ?? '') === 'ok',
            'message' => $saveResult['msg'] ?? 'Ustawienia zostały zapisane.',
            'errors' => (($saveResult['status'] ?? '') === 'ok') ? [] : ['general' => ($saveResult['msg'] ?? 'Błąd zapisu.')],
        ]);
        exit;
    }

    /**
     * Widok ustawien.
     */
    public function view(): string
    {
        $languages = $this->languagesRepository->languagesList();
        $settings = $this->settingsRepository->getSettings();

        $validationErrors = $_SESSION['form_errors'][$this->getFormId()] ?? null;
        if ($validationErrors) {
            unset($_SESSION['form_errors'][$this->getFormId()]);
        }

        $viewModel = $this->buildFormViewModel($settings, $languages, $validationErrors);

        return \Tpl::view('components/form-edit', ['form' => $viewModel]);
    }

    private function buildFormViewModel(array $settings, array $languages, ?array $errors = null): FormEditViewModel
    {
        $data = $this->transformSettingsToFormData($settings, $languages);

        $tabs = [
            new FormTab('contact', 'Dane kontaktowe', 'fa-paper-plane'),
            new FormTab('shop', 'Sklep', 'fa-dollar'),
            new FormTab('products', 'Produkty', 'fa-shopping-cart'),
            new FormTab('mail', 'Poczta', 'fa-envelope'),
            new FormTab('other', 'Pozostałe', 'fa-bars'),
            new FormTab('system', 'System', 'fa-cog'),
            new FormTab('conversions', 'Konwersje', 'fa-line-chart'),
        ];

        $fields = [
            FormField::text('firm_name', [
                'label' => 'Nazwa firmy',
                'tab' => 'contact',
            ]),
            FormField::editor('additional_info', [
                'label' => 'Dodatkowe informacje',
                'tab' => 'contact',
                'height' => 150,
            ]),
            FormField::switch('google_maps', [
                'label' => 'Mapa',
                'tab' => 'contact',
            ]),
            FormField::textarea('firm_adress', [
                'label' => 'Mapa - adres',
                'tab' => 'contact',
            ]),

            FormField::editor('shop_bank_account_info', [
                'label' => 'Dane do przelewu',
                'tab' => 'shop',
                'height' => 200,
            ]),
            FormField::text('hotpay_api', [
                'label' => 'Klucz API HotPay',
                'tab' => 'shop',
            ]),
            FormField::switch('tpay_sandbox', [
                'label' => 'Tpay.com - tryb sandbox',
                'tab' => 'shop',
            ]),
            FormField::text('tpay_id', [
                'label' => 'Tpay.com ID',
                'tab' => 'shop',
            ]),
            FormField::text('tpay_security_code', [
                'label' => 'Tpay.com - kod bezpieczeństwa',
                'tab' => 'shop',
            ]),
            FormField::switch('przelewy24_sandbox', [
                'label' => 'Przelewy24.pl - tryb sandbox',
                'tab' => 'shop',
            ]),
            FormField::text('przelewy24_merchant_id', [
                'label' => 'Przelewy24.pl - merchant ID',
                'tab' => 'shop',
            ]),
            FormField::text('przelewy24_crc_key', [
                'label' => 'Przelewy24.pl - klucz CRC',
                'tab' => 'shop',
            ]),
            FormField::text('free_delivery', [
                'label' => 'Darmowa dostawa od',
                'tab' => 'shop',
                'attributes' => ['class' => 'number-format'],
            ]),
            FormField::text('orlen_paczka_map_token', [
                'label' => 'Orlen Paczka map token',
                'tab' => 'shop',
            ]),

            FormField::langSection('warehouse_messages', 'products', [
                FormField::text('warehouse_message_zero', [
                    'label' => 'Komunikat gdy stan magazynowy równy 0',
                ]),
                FormField::text('warehouse_message_nonzero', [
                    'label' => 'Komunikat gdy stan magazynowy większy niż 0',
                ]),
            ]),

            FormField::switch('contact_form', [
                'label' => 'Formularz kontaktowy',
                'tab' => 'mail',
            ]),
            FormField::text('contact_email', [
                'label' => 'Email kontaktowy',
                'tab' => 'mail',
            ]),
            FormField::text('email_host', [
                'label' => 'Email - host',
                'tab' => 'mail',
            ]),
            FormField::text('email_port', [
                'label' => 'Email - port',
                'tab' => 'mail',
            ]),
            FormField::text('email_login', [
                'label' => 'Email - login',
                'tab' => 'mail',
            ]),
            FormField::text('email_password', [
                'label' => 'Email - hasło',
                'tab' => 'mail',
            ]),

            FormField::text('facebook_link', [
                'label' => 'Facebook link',
                'tab' => 'other',
            ]),
            FormField::text('piksel', [
                'label' => 'Piksel Facebook',
                'tab' => 'other',
            ]),
            FormField::textarea('statistic_code', [
                'label' => 'Kod statystyk',
                'tab' => 'other',
                'rows' => 10,
            ]),
            FormField::textarea('htaccess', [
                'label' => 'Własne reguły htacess',
                'tab' => 'other',
                'rows' => 10,
            ]),
            FormField::textarea('robots', [
                'label' => 'Własne reguły robots.txt',
                'tab' => 'other',
                'rows' => 10,
            ]),

            FormField::switch('update', [
                'label' => 'Aktualizacja',
                'tab' => 'system',
            ]),
            FormField::text('update_key', [
                'label' => 'Numer licencji',
                'tab' => 'system',
            ]),
            FormField::switch('devel', [
                'label' => 'Strona konstrukcyjna',
                'tab' => 'system',
            ]),
            FormField::switch('lazy_loading', [
                'label' => 'Lazy loading obrazów',
                'tab' => 'system',
            ]),
            FormField::switch('generate_webp', [
                'label' => 'Generowanie obrazków WEBP',
                'tab' => 'system',
            ]),
            FormField::switch('infinitescroll', [
                'label' => 'Infinitescroll',
                'tab' => 'system',
            ]),
            FormField::switch('htaccess_cache', [
                'label' => 'Htaccess cache',
                'tab' => 'system',
            ]),

            FormField::text('google_tag_manager_id', [
                'label' => 'Google Tag Manager - ID',
                'tab' => 'conversions',
            ]),
            FormField::textarea('own_gtm_js', [
                'label' => 'Własny kod GTM JS (bez tagu script)',
                'tab' => 'conversions',
                'rows' => 10,
            ]),
            FormField::textarea('own_gtm_html', [
                'label' => 'Własny kod GTM HTML',
                'tab' => 'conversions',
                'rows' => 10,
            ]),
        ];

        $actions = [
            FormAction::save('/admin/settings/settings_save/', ''),
        ];

        return new FormEditViewModel(
            $this->getFormId(),
            'Edycja ustawień',
            $data,
            $fields,
            $tabs,
            $actions,
            'POST',
            '/admin/settings/settings_save/',
            null,
            false,
            [],
            $languages,
            $errors
        );
    }

    private function getFormId(): string
    {
        return 'settings-edit';
    }

    private function transformSettingsToFormData(array $settings, array $languages): array
    {
        $data = $settings;
        $data['languages'] = [];

        foreach ($languages as $lang) {
            if (!($lang['status'] ?? false)) {
                continue;
            }

            $langId = (string)$lang['id'];
            $data['languages'][$langId] = [
                'warehouse_message_zero' => $settings['warehouse_message_zero_' . $langId] ?? '',
                'warehouse_message_nonzero' => $settings['warehouse_message_nonzero_' . $langId] ?? '',
            ];
        }

        return $data;
    }

    private function transformFormDataToSettings(array $data): array
    {
        if (!isset($data['warehouse_messages']) || !is_array($data['warehouse_messages'])) {
            return $data;
        }

        $data['warehouse_message_zero'] = [];
        $data['warehouse_message_nonzero'] = [];

        foreach ($data['warehouse_messages'] as $langId => $langValues) {
            if (!is_array($langValues)) {
                continue;
            }

            $data['warehouse_message_zero'][$langId] = $langValues['warehouse_message_zero'] ?? '';
            $data['warehouse_message_nonzero'][$langId] = $langValues['warehouse_message_nonzero'] ?? '';
        }

        unset($data['warehouse_messages']);

        return $data;
    }
}