import { TRPCError } from "@trpc/server"
import { cookies, headers } from "next/headers"
import { redirect } from "next/navigation"

import { Lang } from "@scandic-hotels/common/constants/language"
import { createContext } from "@scandic-hotels/trpc/context"
import {
  appServerClient,
  configureServerClient,
} from "@scandic-hotels/trpc/serverClient"

import { login } from "@/constants/routes/handleAuth"
import { webviews } from "@/constants/routes/webviews"

import { auth } from "@/auth"

import type { Session } from "next-auth"

export async function createAppContext() {
  const headersList = await headers()
  const cookie = await cookies()
  const webviewTokenCookie = cookie.get("webviewToken")
  const loginType = headersList.get("loginType")

  const ctx = createContext({
    lang: headersList.get("x-lang") as Lang,
    pathname: headersList.get("x-pathname")!,
    uid: headersList.get("x-uid"),
    url: headersList.get("x-url")!,
    webToken: webviewTokenCookie?.value,
    contentType: headersList.get("x-contenttype")!,
    auth: async () => {
      const session = await auth()
      const webToken = webviewTokenCookie?.value
      if (!session?.token && !webToken) {
        return null
      }

      return (
        session ||
        ({
          token: { access_token: webToken, loginType },
        } as Session)
      )
    },
  })

  return ctx
}

configureServerClient(createAppContext)

export async function serverClient() {
  const ctx = await createAppContext()

  return appServerClient(ctx, {
    onError: ({ ctx, error }) => {
      if (error instanceof TRPCError) {
        if (error.code === "UNAUTHORIZED") {
          let lang = Lang.en
          let pathname = "/"
          let fullUrl = "/"

          if (ctx) {
            lang = ctx.lang
            pathname = ctx.pathname
            fullUrl = ctx.url
          }

          const fullPathname = new URL(fullUrl).pathname

          if (webviews.includes(fullPathname)) {
            const redirectUrl = `/${lang}/webview/refresh?returnurl=${encodeURIComponent(fullPathname)}`
            console.error(
              "Unautorized in webview, redirecting to: ",
              redirectUrl
            )

            console.log(`[serverClient] onError redirecting to: ${redirectUrl}`)
            redirect(redirectUrl)
          }

          const redirectUrl = `${login[lang]}?redirectTo=${encodeURIComponent(`/${lang}/${pathname}`)}`
          console.log(`[serverClient] onError redirecting to: ${redirectUrl}`)
          redirect(redirectUrl)
        }
      }
    },
  })
}