<?php
require_once __DIR__.'/../lib/docset_repository.php';
require_once __DIR__.'/../lib/docset_renderer.php';

$repo = new DocsetRepository();
$docsetId = (string)($_GET['docset'] ?? '');
$relativePath = (string)($_GET['path'] ?? '');
$doc = $repo->resolveDocumentPath($docsetId, $relativePath);
if(!$doc)
{
	http_response_code(404);
	header('Content-Type: text/plain; charset=utf-8');
	echo "Docset asset not found.";
	exit;
}

$file = $doc['file'];
$mime = detect_docset_mime($file);
header('Content-Type: '.$mime);
header('X-Content-Type-Options: nosniff');

if(str_starts_with($mime, 'text/html'))
{
	header("Content-Security-Policy: default-src 'self' data:; script-src 'none'; object-src 'none'; frame-ancestors 'self'; img-src 'self' data:; font-src 'self' data:; style-src 'self' 'unsafe-inline'");
	echo DocsetRenderer::rewriteAssetHtml((string)file_get_contents($file), $repo, $docsetId, dirname($doc['relative']));
	exit;
}

readfile($file);
exit;

function detect_docset_mime(string $file): string
{
	$extension = strtolower(pathinfo($file, PATHINFO_EXTENSION));
	$map = array(
		'html' => 'text/html; charset=utf-8',
		'htm' => 'text/html; charset=utf-8',
		'css' => 'text/css; charset=utf-8',
		'js' => 'application/javascript; charset=utf-8',
		'json' => 'application/json; charset=utf-8',
		'png' => 'image/png',
		'jpg' => 'image/jpeg',
		'jpeg' => 'image/jpeg',
		'gif' => 'image/gif',
		'svg' => 'image/svg+xml',
		'webp' => 'image/webp',
		'woff' => 'font/woff',
		'woff2' => 'font/woff2',
		'ttf' => 'font/ttf',
		'ico' => 'image/x-icon',
	);
	return $map[$extension] ?? 'application/octet-stream';
}