<?php

function text($path, $default = "")
{
    $file = __DIR__ . "/.data/$path";
    return file_exists($file) ? trim(file_get_contents($file)) : $default;
}

function routing($dir, $input)
{
    $segments = explode("/", $input);
    $currentFolder = $dir;
    while (count($segments) > 0) {
        $segment = array_shift($segments);
        if (strpos($segment, "..") !== false) {
            header("HTTP/1.1 404 Not Found");
            header("X-Error: Double dot in path");
            exit;
        }
        $path = "$currentFolder/$segment.php";
        if (is_file($path)) {
            return $path;
        }
        $path = "$currentFolder/$segment";
        if (is_dir($path)) {
            $currentFolder = "$currentFolder/$segment";
            continue;
        }
        $path = "$currentFolder/_id.php";
        if (is_file($path)) {
            return $path;
        }
        $path = "$currentFolder/_404.php";
        if (is_file($path)) {
            return $path;
        }
        return __DIR__ . "/.routes/_404.php";
    }
    $file = "$currentFolder/_index.php";
    if (is_file($file)) {
        return $file;
    }
    return __DIR__ . "/.routes/_404.php";
}

$path = $_GET["path"] ?: "products/1234";

$cfg_title = "example.com";
$file = routing(__DIR__ . "/.routes", $path);

require $file;