/**
 * @module
 * Gaman MIME Utilities
 */

/**
 * Reference:
 * Inspired by Hono's internal mime utility.
 * https://github.com/honojs/hono/blob/main/src/utils/mime.ts
 */

export const detectMime = (
	fileName: string,
	types: Record<string, string> = {},
): string | undefined => {
	types = { ...GAMAN_MIME, ...types };

	const ext = fileName.split('.').pop()?.toLowerCase();
	if (!ext) return;
	let type = types[ext];
	if (type?.startsWith('text/')) {
		type += '; charset=utf-8';
	}
	return type;
};

export const detectExtension = (
	mimeType: string,
	types: Record<string, string> = {},
): string | undefined => {
	types = { ...GAMAN_MIME, ...types };
	for (const key in types) {
		if (types[key] === mimeType) return key;
	}
};

export { GAMAN_MIME };

const GAMAN_MIME: Record<string, string> = {
	aac: 'audio/aac',
	avi: 'video/x-msvideo',
	avif: 'image/avif',
	av1: 'video/av1',
	bin: 'application/octet-stream',
	bmp: 'image/bmp',
	css: 'text/css',
	csv: 'text/csv',
	eot: 'application/vnd.ms-fontobject',
	epub: 'application/epub+zip',
	gif: 'image/gif',
	gz: 'application/gzip',
	htm: 'text/html',
	html: 'text/html',
	ico: 'image/x-icon',
	ics: 'text/calendar',
	jpeg: 'image/jpeg',
	jpg: 'image/jpeg',
	js: 'application/javascript',
	json: 'application/json',
	jsonld: 'application/ld+json',
	map: 'application/json',
	mid: 'audio/midi',
	midi: 'audio/midi',
	mjs: 'application/javascript',
	mp3: 'audio/mpeg',
	mp4: 'video/mp4',
	mpeg: 'video/mpeg',
	oga: 'audio/ogg',
	ogv: 'video/ogg',
	ogx: 'application/ogg',
	opus: 'audio/opus',
	otf: 'font/otf',
	pdf: 'application/pdf',
	png: 'image/png',
	rtf: 'application/rtf',
	svg: 'image/svg+xml',
	tif: 'image/tiff',
	tiff: 'image/tiff',
	ts: 'video/mp2t',
	ttf: 'font/ttf',
	txt: 'text/plain',
	wasm: 'application/wasm',
	webm: 'video/webm',
	weba: 'audio/webm',
	webmanifest: 'application/manifest+json',
	webp: 'image/webp',
	woff: 'font/woff',
	woff2: 'font/woff2',
	xhtml: 'application/xhtml+xml',
	xml: 'application/xml',
	zip: 'application/zip',
	'3gp': 'video/3gpp',
	'3g2': 'video/3gpp2',
	gltf: 'model/gltf+json',
	glb: 'model/gltf-binary',
};