<?php
// TODO FOR LAUNCH
//  - Make a new list of headers, make sure they're small in file size

// TODO deferred
//  - Make related page

// Todo ultra-deferred
//  - Make blog script

define('FM_HIT', 0x01000000);
define('FM_ERR', 0x02000000);

define('FM_NAV', [
    ['title' => 'Home',     'link' => '/'],
    //['title' => 'Blog',     'link' => '//blog.flash.moe'],
    ['title' => 'Blog',     'link' => '//flash.moe/2020/?blog=1'],
    ['title' => 'Projects', 'link' => '/projects'],
    ['title' => 'Contact',  'link' => '/contact'],
    //['title' => 'Related',  'link' => '/related'],
    ['title' => 'Etcetera', 'link' => '/etc'],
    ['title' => 'Forum',    'link' => '//forum.flash.moe'],
]);

define('FM_BGS', [
    '//mikoto.misaka.nl/i/Konachan.com%20-%20164484%20blush%20brown_eyes%20brown_hair%20drink%20misaka_mikoto%20seifuku%20short_hair%20skirt%20socks%20to_aru_kagaku_no_railgun%20to_aru_majutsu_no_index.png',
    '//mikoto.misaka.nl/i/misaka%202.png',
    '//mikoto.misaka.nl/i/misaka.jpg',
    '//mikoto.misaka.nl/i/Drl8DEPWwAAPniH.jpg',
    '//mikoto.misaka.nl/i/65776322_p2_master1200.jpg',
    '//mikoto.misaka.nl/i/52666925_p0.jpg',
    '//mikoto.misaka.nl/i/44161767_p0.jpg',
    '//mikoto.misaka.nl/i/32809110_p0.jpg',
    '//mikoto.misaka.nl/i/1551886307-ZEgXIk2.jpg',
    '//mikoto.misaka.nl/i/1551886971-MgnvSNG.jpg',
    '//mikoto.misaka.nl/i/1551881563-wR2Dcx8.jpg',
    '//mikoto.misaka.nl/i/1552084409-BsTLlKg.jpg',
]);

define('FM_FEET', [
    'if it ain\'t broke, i\'ll break it',
]);

define('FM_ERRS' , [
    403 => ['code'  => 403, 'title' => 'Access Denied'],
    404 => ['code'  => 404, 'title' => 'Not Found'],
    405 => ['code'  => 405, 'title' => 'Method Not Supported'],
]);

function fm_component(string $name, array $vars = []) {
    extract($vars);
    require __DIR__ . '/../components/' . $name . '.php';
}

function first_paragraph(string $text, string $delimiter = "\n"): string {
    $index = mb_strpos($text, $delimiter);
    return $index === false ? $text : mb_substr($text, 0, $index);
}

function time_elapsed(int $since, bool $full = false): string {
    $now = new DateTime;
    $since = new DateTime(date('c', $since));
    $diff = $now->diff($since);

    $diff->w = floor($diff->d / 7);
    $diff->d -= $diff->w * 7;

    $string = [
        'y' => 'year',
        'm' => 'month',
        'w' => 'week',
        'd' => 'day',
        'h' => 'hour',
        'i' => 'minute',
        's' => 'second',
    ];

    foreach($string as $key => &$value) {
        if($diff->{$key})
            $value = $diff->{$key} . ' ' . $value . ($diff->{$key} > 1 ? 's' : '');
        else
            unset($string[$key]);
    }

    if(!$full)
        $string = array_slice($string, 0, 1);
    return $string ? implode(', ', $string) . ' ago' : 'just now';
}

function cache_output(string $name, int $lifetime, callable $callable) {
    $path = sys_get_temp_dir() . '/fm-' . $name . '.cache';
    if(!is_file($path) || (filemtime($path) + $lifetime) < time())
        file_put_contents($path, serialize($callable()));
    return unserialize(file_get_contents($path));
}

set_include_path(realpath(__DIR__ . '/../lib/') . PATH_SEPARATOR . get_include_path());
spl_autoload_extensions('.php');
spl_autoload_register();

ob_start();

$reqMethod =                      filter_input(INPUT_SERVER, 'REQUEST_METHOD', FILTER_SANITIZE_STRING);
$reqPath   = '/' . trim(parse_url(filter_input(INPUT_SERVER, 'REQUEST_URI',    FILTER_SANITIZE_STRING), PHP_URL_PATH), '/');

if(substr($reqPath, 0, 7) === '/error/') {
    $statusCode = intval(substr($reqPath, 8, 3));
} else {
    foreach(glob(__DIR__ . '/../pages/*.php') as $page) {
        $result = include_once $page;
        $statusCode = $result & 0xFFF;
        if(($result & FM_HIT) === FM_HIT) {
            if($statusCode >= 100 && $statusCode <= 999)
                http_response_code($statusCode);
            return;
        }
        if(($result & FM_ERR) === FM_ERR)
            break;
    }
}

$errorInfo = FM_ERRS[$statusCode ?? 404] ?? FM_ERRS[404];
http_response_code($errorInfo['code']);
fm_component('header', ['title' => $errorInfo['title']]);
printf("            <h2>%s</h2>\r\n", $errorInfo['title']);
fm_component('footer');