<?php

use MyApp\Core\Config;
use MyApp\Core\Router;

class App
{
    private $prefix = 'MyApp\\';

    private $classDirs = [
        'Controller\\' => 'controllers/',
        'Core\\' => 'core/',
        'Model\\' => 'models/',
        'Service\\' => 'services/',
        'View\\' => 'views/',
    ];
    private $basedir = __DIR__;
    /**
     * @var Config
     */
    public $config;
    /**
     * @var \PDO
     */
    public $db = null;

    /**
     * App constructor.
     *
     * @param bool $start Start router. Default true.
     */
    public function __construct(bool $start = true)
    {
        global $app;
        $app = $this;
        spl_autoload_register([$this, 'autoload']);

        $this->config = (new Config())->setDbName('db')
                                      ->setDbPort(3306)
                                      ->setDbUser('user')
                                      ->setDbPassword('password')
                                      ->setSrcDir($this->basedir)
                                      ->setTimezone('Europe/Moscow')
                                      ->setClassDirs($this->classDirs)
                                      ->setControllersDir($this->basedir.'/controllers/')
                                      ->setControllersNamespace('\\MyApp\\Controller\\')
                                      ->setSiteName('BadPing. Nagios better');

        if ($start) {
            new Router();
        }
    }

    /**
     * Autoload function.
     *
     * @param string $className
     */
    public function autoload(string $className)
    {
        if (0 !== strpos($className, $this->prefix)) {
            return;
        }

        $fileName = substr($className, strlen($this->prefix));
        $fileName = str_replace(array_keys($this->classDirs), array_values($this->classDirs), $fileName);
        $fileName = $this->basedir.'/'.str_replace('\\', '/', $fileName).'.php';

        if (file_exists($fileName)) {
            require $fileName;
        }
    }

    /**
     * Parse tags from method comments.
     *
     * @param string $comment
     * @param string $tags
     *
     * @return array|null
     */
    public function parseTagsFromComment(string $comment, string $tags = 'RouteRegExp|HttpMethod')
    {
        if (preg_match_all("/^\\ *\\* \\@(?<type>$tags)\\ =\\ \"(?<value>.*)\\\".*\$/m", $comment, $matches)) {
            $out = [];
            foreach ($matches['type'] as $key => $type) {
                if ('HttpMethod' == $type) {
                    $out[$type] = explode(',', $matches['value'][$key]);
                } else {
                    $out[$type] = $matches['value'][$key];
                }
            }

            return $out;
        }

        return null;
    }
}