import { resolver, SecurePassword, AuthenticationError } from "blitz"

import db, { Role } from "../../../db"
import { Login } from "../validations"

export const authenticateUser = async (rawEmail: string, rawPassword: string) => {
	const email = rawEmail.toLowerCase().trim()
	const password = rawPassword.trim()
	const user = await db.user.findFirst({ where: { email } })
	if (!user) throw new AuthenticationError()

	const result = await SecurePassword.verify(user.hashedPassword, password)

	if (result === SecurePassword.VALID_NEEDS_REHASH) {
		// Upgrade hashed password with a more secure hash
		const improvedHash = await SecurePassword.hash(password)
		await db.user.update({ where: { id: user.id }, data: { hashedPassword: improvedHash } })
	}

	const { hashedPassword, ...rest } = user
	return rest
}

export default resolver.pipe(resolver.zod(Login), async ({ email, password }, ctx) => {
	// This throws an error if credentials are invalid
	const user = await authenticateUser(email, password)

	await ctx.session.$create({ userId: user.id, role: user.role as Role })

	return user
})