<?php

namespace App\Controllers;

use App\Lib\PCaptcha;
use App\Services\LxdService;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use App\Utils\LogWriterHelper;

class LoginController
{
    /**
     * Login with captcha
     */
    public function index(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
    {   
        
        try {
            $mainDomain = $_ENV['MAIN_DOMAIN'] ?? 'lxdapp.local';

            $origin = $request->getHeaderLine('Origin');
            if (!empty($origin)) {
                $domain = parse_url($origin, PHP_URL_HOST);
            } else {
                $domain = $request->getHeaderLine('Host');
            }

            $configPath = __DIR__ . '/../../config.json';
            $config = file_exists($configPath) ? json_decode(file_get_contents($configPath), true) : [];
            $name = $config[$domain] ?? null;
            $params = (array)$request->getParsedBody();
            if(!$name){
               return $this->json($response, [
                'status' => 'not_found',
                'message' => 'Container not found',
            ], 404); 
            }
            $captcha = new PCaptcha();

            if (!$captcha->validate_captcha($params['panswer'])) {
                return $this->json($response, ['status' => 'error', 'message' => 'Invalid CAPTCHA'], 400);
            }

            $lxd = new LxdService();

            $status = $lxd->getContainerState($name)['metadata']['status'] ?? 'Stopped';
            if ($status !== 'Running') {
                $lxd->startContainer($name);
            }

            // Write log
            LogWriterHelper::write($name, $request->getUri());

            $redirect = '/waiting?name='.$name .'&redirect='.urlencode($params['redirect']);
            // Login success
            return $this->json($response, ['status' => 'success', 'message' => 'Container started!', 'redirect' => $redirect]);
        } catch (\Throwable $e) {
            return $this->json($response, [
                'status' => 'error',
                'message' => $e->getMessage(),
            ], 500);
        }
    }

    public function status(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
    {   
        $queryParams = $request->getQueryParams();
        $name = $queryParams['name'] ?? '';

        if (empty($name)) {
            return $this->json($response, [
                'status' => 'error',
                'message' => 'Missing container name.',
            ], 400);
        }

        $lxd = new LxdService();

        $state = $lxd->getContainerState($name);
        if (!$state) {
            return $this->json($response, [
                'status' => 'not_found',
                'message' => 'Container not found',
            ], 404);
        }

        $status = $state['metadata']['status'] ?? 'Stopped';
        if ($status !== 'Running') {
            return $this->json($response, [
                'status' => 'starting',
                'message' => 'Container is not yet running',
            ]);
        }

        $ip = $lxd->getContainerIP($name);
        $nginx = $lxd->isServiceRunning($name, 'nginx');
        $mysql = $lxd->isServiceRunning($name, 'mysql');
        if ($ip && $nginx === 'active' && $mysql === 'active') {
            return $this->json($response, [
                'status' => 'ready',
                'ip' => $ip,
                'message' => 'Container is ready',
            ]);
        }

        if($nginx === 'failed'){
            return $this->json($response, [
                'status' => 'failed',
                'message' => 'Failed to start web server service in container',
            ], 400);
        }

        if($mysql === 'failed'){
            return $this->json($response, [
                'status' => 'failed',
                'message' => 'Failed to start mysql service in container',
            ], 400);
        }

        return $this->json($response, [
            'status' => 'running',
            'message' => 'Container is running, waiting for services...',
        ]);
    }


    /**
     * Sends a JSON response.
     */
    protected function json($response, array $data, int $status = 200)
    {
        $payload = json_encode($data, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);

        $response->getBody()->write($payload);

        return $response
            ->withHeader('Content-Type', 'application/json')
            ->withHeader('Access-Control-Allow-Origin', '*')
            ->withStatus($status);
    }

}