<?php

$data_time_start = microtime(true);

require_once 'vendor/autoload.php';
require_once 'post_adapter.php';


$adapter = new PostHandler();

$loader = new \Twig\Loader\FilesystemLoader(['./templates', './user_content']);

$twig = new \Twig\Environment($loader,['debug' => true]);
$twig->addExtension(new Twig\Extra\Markdown\MarkdownExtension());

use Twig\Extra\Markdown\DefaultMarkdown;
use Twig\Extra\Markdown\MarkdownRuntime;
use Twig\RuntimeLoader\RuntimeLoaderInterface;

function deduce_user_agent() {
    $real_agent=$_SERVER['HTTP_USER_AGENT'];

    if(preg_match('/(Googlebot|\w*Google\w*)/', $real_agent, $match)) {
        return "bot/google/" . $match[1];
    }
    elseif(preg_match('/(Mozilla|Chrome|Chromium)/', $real_agent, $match)) {
        return "user/" . $match[1];
    }
    else {
        return "unidentified";
    }
}

function log_and_die($path, $die_code = 0, $referrer = null) {
    global $data_time_start;
    global $adapter;

    $data_time_end = microtime(true);

    if(!isset($referrer)) {
        $referrer = 'magic';
        
        if(isset($_SERVER['HTTP_REFERER'])) {
            $referrer = parse_url($_SERVER['HTTP_REFERER'], PHP_URL_HOST);
        }
    }

    $adapter->log_post_access($path,
        deduce_user_agent(),
        $referrer,
        $data_time_end - $data_time_start);

    die($die_code);
}

$twig->addRuntimeLoader(new class implements RuntimeLoaderInterface {
    public function load($class) {
        if (MarkdownRuntime::class === $class) {
            return new MarkdownRuntime(new DefaultMarkdown());
        }
    }
});

function generate_website($SURI) {
    global $twig;
    global $adapter;

    if(preg_match('/^\/api\/admin/', $SURI)) {
        header('Content-Type: application/json');

        $user_api_key = '';
        if(isset($_GET['api_key'])) {
            $user_api_key = $_GET['api_key'];
        }
        if(isset($_POST['api_key'])) {
            $user_api_key = $_POST['api_key'];
        }

        if($user_api_key != file_get_contents('secrets/api_admin_key')) {
            http_response_code(401);

            echo json_encode([
                "authorized" => false
            ]);

            log_and_die('/api/401');
        }

        if($SURI = '/api/admin/upload') {
            $adapter->handle_upload($_POST['post_path'], $_FILES['post_data']['tmp_name']);

            echo json_encode(["ok" => true]);
        }
    } elseif(preg_match('/^\/api/', $SURI)) {
        if($SURI == '/api/post_counters') {
            header('Content-Type: application/json');
            echo json_encode($adapter->get_post_access_counters());
        } elseif($SURI == '/api/metrics') {
            header('Content-Type: application/line');
            echo $adapter->get_post_access_counters_line();
        } elseif(preg_match('/^\/api\/posts(.*)$/', $SURI, $match)) {

            header('Content-Type: application/json');
            echo json_encode($adapter->get_post_by_path($match[1]));

        } elseif(preg_match('/^\/api\/subposts(.*)$/', $SURI, $match)) {

            header('Content-Type: application/json');
            echo json_encode(get_subposts($match[1]));
        } elseif($SURI == '/api/upload') {

            echo $twig->render('upload.html');
        }
    } elseif(preg_match('/^\s*image/', $_SERVER['HTTP_ACCEPT'])) {
        header('Location: /raw' . $SURI);
        exit(0);
    } elseif(true) {
        $post = $adapter->get_post_by_path($SURI);

        if(!$post['found']) {
            echo $twig->render('post_types/rrror.html',[
                "error_code" => '404 Hoard not found!',
                "error_description" => "Well, we searched 
                    far and wide for `" . $SURI . "` but 
                    somehow it must have gotten lost... Sorry!",
                "post" => $post
            ]);

            log_and_die('/404', referrer: ($_SERVER['HTTP_REFERER'] ?? 'magic'));
        }

        if($post['post_metadata']['type'] == 'directory') {
            if(preg_match('/^(.*[^\/])((?:#.*)?)$/', $SURI, $match)) {
                header('Location: ' . $match[1] . '/' . $match[2]);
                
                die();
            }

            echo $twig->render('post_types/directory.html', [ 
                "post" => $post,
                "subposts" => $adapter->get_subposts_by_path($SURI)
            ]);
        }
        elseif($post['post_metadata']['type'] == 'text/markdown') {
            echo $twig->render('post_types/markdown.html', [ 
                "post" => $post
            ]);
        }
        elseif($post['post_metadata']['type'] == 'image') {
            echo $twig->render('post_types/image.html', [
                "post" => $post
            ]);
        }

    } else {
        echo $twig->render('rrror.html',[
            "error_code" => '404 Hoard not found!',
            "error_description" => "Well, we searched 
                far and wide for `" . $SURI . "` but 
                somehow it must have gotten lost... Sorry!"
        ]);	 
    }
}

generate_website($_SERVER['REQUEST_URI']);

log_and_die($_SERVER['REQUEST_URI']);

?>