import { NextRequest, NextResponse } from "next/server"
import { AuthError } from "next-auth"

import { Lang } from "@/constants/languages"
import { login } from "@/constants/routes/handleAuth"
import { env } from "@/env/server"
import { badRequest, internalServerError } from "@/server/errors/next"

import { signIn } from "@/auth"

export async function GET(
  request: NextRequest,
  context: { params: { lang: Lang } }
) {
  let redirectTo: string

  // Set redirect url from the magicLinkRedirect Cookie which is set when intiating login
  redirectTo =
    request.cookies.get("magicLinkRedirectTo")?.value ||
    "/" + context.params.lang

  if (!env.PUBLIC_URL) {
    throw internalServerError("No value for env.PUBLIC_URL")
  }

  // Make relative URL to absolute URL
  if (redirectTo.startsWith("/")) {
    redirectTo = new URL(redirectTo, env.PUBLIC_URL).href
  }

  // Update Seamless login url as Magic link login has a different authenticator in Curity
  redirectTo = redirectTo.replace("updatelogin", "updateloginemail")

  const loginKey = request.nextUrl.searchParams.get("loginKey")

  if (!loginKey) {
    return badRequest()
  }

  try {
    /**
     * Passing `redirect: false` to `signIn` will return the URL instead of
     * automatically redirecting to it inside of `signIn`.
     * https://github.com/nextauthjs/next-auth/blob/3c035ec/packages/next-auth/src/lib/actions.ts#L76
     */
    console.log({ login_redirectTo: redirectTo })
    let redirectUrl = await signIn(
      "curity",
      {
        redirectTo,
        redirect: false,
      },
      {
        ui_locales: context.params.lang,
        scope: ["openid", "profile"].join(" "),
        loginKey: loginKey,
        for_origin: env.PUBLIC_URL,
        acr_values: "abc",
        version: "2",
      }
    )

    if (redirectUrl) {
      return NextResponse.redirect(redirectUrl)
    }
  } catch (error) {
    if (error instanceof AuthError) {
      console.error({ signInAuthError: error })
    } else {
      console.error({ signInError: error })
    }
  }

  return internalServerError()
}