import 'npm:iterator-polyfill'
import { define } from '../../../utils.ts'
// Polyfill AsyncIterator
// import { db } from ':src/db/mod.ts'
// import { SessionStore } from ':src/session/mod.ts'
// import { respondApi } from ':src/utils.ts'
// import { Contact, type Mail, send } from '@cohabit/mailer'
// import { magicLinkTemplate } from '@cohabit/mailer/templates'
// import { User } from '@cohabit/resources-manager/models'
// import { sleep } from '@jotsr/delayed'

// type MagicLinkInfos = {
// 	remoteId: string
// 	email: string
// 	timestamp: number
// }

// export async function getUserByMail(email: string): Promise<User | undefined> {
// 	const [user] = await db.resource.user
// 		.list((user) => user.mail === email)
// 		.take(1)
// 		.toArray()

// 	return user
// }
export const handler = define.handlers({})
// export const _handler = define.handlers({
// 	async POST(ctx) {
// 		const request = ctx.req
// 		const { email } = await request.json() as { email: string }

// 		// check email before continue
// 		if (!/\S+@\S+\.\S+/.test(email)) {
// 			return respondApi('error', new SyntaxError('empty or invalid email'), 400)
// 		}

// 		const user = await getUserByMail(email)

// 		// generate magic link
// 		const token = crypto.randomUUID()

// 		if (ctx.state.session === undefined) {
// 			return respondApi(
// 				'error',
// 				new Error('missing server session for current user'),
// 				500,
// 			)
// 		}

// 		const remoteAddr = ctx.info.remoteAddr
// 		if (!('hostname' in remoteAddr)) {
// 			return respondApi('error', new Error('connection is not using http'), 500)
// 		}

// 		const endpoint =
// 			`${ctx.url.origin}/api/magiclink?token=${token}&session=${ctx.state.session.uuid}&redirect=/profil`

// 		// save token to session
// 		ctx.state.session.flash<MagicLinkInfos>(`MAGIC_LINK__${token}`, {
// 			email,
// 			remoteId: remoteId(request, { remoteAddr }),
// 			timestamp: Date.now(),
// 		})

// 		// send mail to user
// 		try {
// 			if (user) {
// 				// Get user ip through proxy else from tcp connection
// 				const ip = request.headers.get('X-FORWARDED-FOR') ?? remoteAddr.hostname
// 				const device = request.headers.get('Sec-Ch-Ua-Platform') ?? undefined

// 				await sendMagicLink(user, { device, ip, endpoint })
// 			} else {
// 				//! perform wait to prevent time attacks
// 				await sleep(Math.random() * 5_000 + 2_000) //between 2s and 7s
// 			}
// 			return respondApi('success')
// 		} catch (error) {
// 			console.error('MAGIC_LINK_SENDING', error)
// 			return respondApi(
// 				'error',
// 				new Error(`unable to send mail to ${email}`),
// 				500,
// 			)
// 		}
// 	},
// 	async GET(ctx) {
// 		const request = ctx.req

// 		const token = ctx.url.searchParams.get('token')
// 		const redirect = ctx.url.searchParams.get('redirect')
// 		const sessionId = ctx.url.searchParams.get('session')

// 		// no token or sessionId
// 		if (token === null || sessionId === null) {
// 			return respondApi('error', 'no token or session provided', 400)
// 		}

// 		// set session if 3rd party cookies was blocked
// 		ctx.state.session = ctx.state.session ?? SessionStore.getSession(sessionId)

// 		// no session available
// 		if (ctx.state.session === null || ctx.state.session === undefined) {
// 			return respondApi('error', 'no session datas', 401)
// 		}

// 		// wrong or timeout token
// 		const entry = ctx.state.session.get<MagicLinkInfos>(`MAGIC_LINK__${token}`)

// 		const lifespan = Date.now() - 10 * 60 * 1_000 // ten minutes

// 		if (entry === undefined || entry.timestamp < lifespan) {
// 			return respondApi('error', 'wrong token or timeout exceeded', 401)
// 		}

// 		const remoteAddr = ctx.info.remoteAddr
// 		if (!('hostname' in remoteAddr)) {
// 			return respondApi('error', new Error('connection is not using http'), 500)
// 		}

// 		// check remote id (same user/machine that has query the token)
// 		if (entry.remoteId === remoteId(request, { remoteAddr })) {
// 			const user = await getUserByMail(entry.email)
// 			ctx.state.session.set('user', user)

// 			if (redirect) {
// 				return Response.redirect(new URL(redirect, ctx.url.origin))
// 			}

// 			return respondApi('success', user)
// 		}

// 		return respondApi(
// 			'error',
// 			new Error(
// 				'invalid id, use the same device/ip to query token and verify token',
// 			),
// 			401,
// 		)
// 	},
// })

// function remoteId(
// 	{ headers }: { headers: Headers },
// 	{ remoteAddr }: { remoteAddr: Deno.NetAddr },
// ): string {
// 	const forwardedAddress = headers.get('X-FORWARDED-FOR')
// 	const forwardedProto = headers.get('X-FORWARDED-PROTO')

// 	if (forwardedAddress && forwardedProto) {
// 		return `${forwardedProto}://${forwardedAddress}`
// 	}

// 	return `(${remoteAddr.transport}):${remoteAddr.hostname}:${remoteAddr.port}`
// }

// async function sendMagicLink(
// 	{ firstname, lastname, mail }: User,
// 	{ device, ip, endpoint }: { device?: string; ip?: string; endpoint: string },
// ): Promise<void> {
// 	const message: Mail = {
// 		from: Contact.expand('contact'),
// 		to: [Contact.fromString(`${firstname} ${lastname} <${mail}>`)],
// 		subject: 'Lien de connection pour FabLab Coh@bit',
// 		body: magicLinkTemplate.builder({
// 			device,
// 			ip,
// 			endpoint,
// 		})!,
// 		options: {
// 			cc: [],
// 			cci: [],
// 			attachments: [],
// 		},
// 	}

// 	await send(message)
// }