import { contentType } from '@std/media-types'
import { extname } from '@std/path'
import { getBaseUrl, getSourceUrl } from './src/url_utils.ts'
import { toUser, toUserDomain } from './src/user_utils.ts'

Deno.serve({ port: Number(Deno.env.get('PORT') ?? 8000) }, async (req) => {
	const reqUrl = new URL(req.url)

	// Get and check user-domain and user-login
	const rawUserDomain = reqUrl.hostname.split('.')[0]
	const userDomain = toUserDomain(rawUserDomain)
	const user = toUser(userDomain)

	console.log(`Getting portfolio of > @${user}`)

	// Get relative source path
	const filePath = `.${reqUrl.pathname}`

	// Get source base url ("/dist" if available, "/" else)
	const baseUrl = await getBaseUrl(user)
	const fileUrl = getSourceUrl(filePath, baseUrl)

	// Get source and mime type
	const response = await fetch(fileUrl)
	const ext = extname(fileUrl.pathname)
	const mimeType = contentType(ext) ?? 'text/plain; charset=utf-8' // Assume plain text as default.

	if (response.ok) {
		// Update content-type if not bin file
		if (response.headers.get('Content-Type') !== 'application/octet-stream') {
			response.headers.set('Content-Type', mimeType)
		}

		// Stream original file to user
		return response
	}

	return response
})