<?php

define('BASE_PATH', __DIR__);

$config = require BASE_PATH . '/config.php';

$app = new App($config);

class App
{
    private $config;

    public function __construct(array $config)
    {
        $this->config = $config;
    }

    public function db()
    {
        if (!isset($this->db)) {
            $host = $this->config['db']['host'];
            $password = $this->config['db']['password'];
            $user = $this->config['db']['user'];
            $dbname = $this->config['db']['dbname'];

            try {
                $this->db = new PDO("mysql:host=$host;dbname=$dbname", $user, $password);
            } catch (PDOException $e) {
                exit('Error: ' . $e->getMessage());
            }
        }

        return $this->db;
    }

    /**
     * Routes requsts to the correct file.
     */
    public function run()
    {
        $uri = $_SERVER['REQUEST_URI'];
        $matches = [];

        switch ($uri) {
            case '/':
            case '/customer':
                require BASE_PATH . '/src/CustomerList.php';
                exit();

            case (preg_match('/^\/customer\/(\d+)$/', $uri, $matches) === 1):
                $customerId = $matches[1];
                require BASE_PATH . '/src/CustomerView.php';
                exit();

            default:
                require BASE_PATH . '/src/404.php';
                exit();
        }
    }
}