<?php

namespace App\Controllers\Admin;

use App\Controllers\Controller;
use App\Core\Request;
use App\Core\Response;
use App\Services\Database\Connection;
use App\Services\Notification\TelegramNotifier;
use PDO;
use Throwable;

class SettingsController extends Controller
{
    private PDO $pdo;
    private TelegramNotifier $notifier;

    public function __construct(Connection $connection, TelegramNotifier $notifier)
    {
        parent::__construct();
        $this->pdo = $connection->getPdo();
        $this->notifier = $notifier;
    }

    public function index(Request $request, Response $response): string
    {
        // Get telegram settings from database
        $tgToken = $this->getSetting('telegram_bot_token', '');
        $tgChatId = $this->getSetting('telegram_chat_id', '');
        $tgEnabled = $this->getSetting('telegram_enabled', '0');

        return $this->render('admin/settings/index', [
            'tg_token' => $tgToken,
            'tg_chat_id' => $tgChatId,
            'tg_enabled' => $tgEnabled,
        ], 'admin');
    }

    public function save(Request $request, Response $response): void
    {
        $tgToken = $request->post('telegram_bot_token', '');
        $tgChatId = $request->post('telegram_chat_id', '');
        $tgEnabled = $request->post('telegram_enabled', '0');
        $action = $request->post('action', 'save');

        $this->saveSetting('telegram_bot_token', $tgToken);
        $this->saveSetting('telegram_chat_id', $tgChatId);
        $this->saveSetting('telegram_enabled', $tgEnabled);

        if ($action === 'test') {
            $this->notifier->configure($tgToken, $tgChatId);
            if ($this->notifier->sendTest()) {
                $this->session->setFlash('success', 'Settings saved and test notification sent to Telegram!');
            } else {
                $err = $this->notifier->getLastError() ?: 'Check your token and chat ID.';
                $this->session->setFlash('error', 'Settings saved, but failed to send Telegram notification: ' . $err);
            }
        } else {
            $this->session->setFlash('success', 'Settings saved successfully.');
        }
        $response->redirect('/admin/settings');
    }

    public function switchLang(Request $request, Response $response, string $lang = 'en'): void
    {
        $lang = $request->routeParam('lang', $lang);
        if (in_array($lang, ['ar', 'en'])) {
            $this->session->set('lang', $lang);
        }
        $ref = $request->getHeader('Referer') ?? '/admin/dashboard';
        $response->redirect($ref);
    }

    private function getSetting(string $key, string $default = ''): string
    {
        $stmt = $this->pdo->prepare("SELECT `value` FROM settings WHERE `key` = ?");
        $stmt->execute([$key]);
        $val = $stmt->fetchColumn();
        return $val !== false ? $val : $default;
    }

    private function saveSetting(string $key, string $value): void
    {
        $stmt = $this->pdo->prepare("INSERT INTO settings (`key`, `value`) VALUES (?, ?) ON DUPLICATE KEY UPDATE `value` = ?");
        $stmt->execute([$key, $value, $value]);
    }
}