import { Brand } from "@/components/ui/brand"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import { SubmitButton } from "@/components/ui/submit-button"
import { createClient } from "@/lib/supabase/server"
import { Database } from "@/supabase/types"
import { createServerClient } from "@supabase/ssr"
import { get } from "@vercel/edge-config"
import { Metadata } from "next"
import { cookies, headers } from "next/headers"
import { redirect } from "next/navigation"


import initTranslations  from "@/lib/i18n";

export const metadata: Metadata = {
  title: "Login"
}

export default async function Login({
  searchParams,
  params: { locale },
}: {
  searchParams: { message: string; email?: string };
  params: { locale: string };
}) {
  const cookieStore = cookies()

  const localeString = locale;
  const { t, resources } = await initTranslations(localeString, ['translation']);

  const supabase = createServerClient<Database>(
    process.env.NEXT_PUBLIC_SUPABASE_URL!,
    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!,
    {
      cookies: {
        get(name: string) {
          return cookieStore.get(name)?.value
        }
      }
    }
  )
  const session = (await supabase.auth.getSession()).data.session

  console.log("[login page]Login session:", session)

  if (session) {
    const { data: homeWorkspace, error } = await supabase
      .from("workspaces")
      .select("*")
      .eq("user_id", session.user.id)
      .eq("is_home", true)
      .single()

    if (!homeWorkspace) {
      throw new Error(error.message)
    }

    // console.log("[login page]======>Redirecting to workspace:", homeWorkspace.id)
    return redirect(`/${localeString}/${homeWorkspace.id}/chat`)

  }

  const signIn = async (formData: FormData) => {
    "use server"

    const email = formData.get("email") as string
    const password = formData.get("password") as string
    const cookieStore = cookies()
    const supabase = createClient(cookieStore)

    const { data, error } = await supabase.auth.signInWithPassword({
      email,
      password
    })

    if (error) {
      // console.log(`[login page]==================> ${localeString}/login?message=${error.message}`);
      return redirect(`/${localeString}/login?message=${error.message}`)
      // return redirect(`/${localeString}/login?message=signupNotAllowed&email=${encodeURIComponent(email)}`)
    }

    const { data: homeWorkspace, error: homeWorkspaceError } = await supabase
      .from("workspaces")
      .select("*")
      .eq("user_id", data.user.id)
      .eq("is_home", true)
      .single()

    if (!homeWorkspace) {
      //const fallbackMessage = String(t("login.unexpectedError"))
      throw new Error(
        homeWorkspaceError?.message || "An unexpected error occurred"
        // homeWorkspaceError?.message || t("login.unexpectedError")
      )
    }

    return redirect(`/${localeString}/${homeWorkspace.id}/chat`)
  }

  const getEnvVarOrEdgeConfigValue = async (name: string) => {
    "use server"
    if (process.env.EDGE_CONFIG) {
      return await get<string>(name)
    }

    return process.env[name]
  }

  const signUp = async (formData: FormData) => {
    "use server"

    
    const email = formData.get("email") as string
    const password = formData.get("password") as string

    const emailDomainWhitelistPatternsString = await getEnvVarOrEdgeConfigValue(
      "EMAIL_DOMAIN_WHITELIST"
    )
    const emailDomainWhitelist = emailDomainWhitelistPatternsString?.trim()
      ? emailDomainWhitelistPatternsString?.split(",")
      : []
    const emailWhitelistPatternsString =
      await getEnvVarOrEdgeConfigValue("EMAIL_WHITELIST")
    const emailWhitelist = emailWhitelistPatternsString?.trim()
      ? emailWhitelistPatternsString?.split(",")
      : []

    // If there are whitelist patterns, check if the email is allowed to sign up
    if (emailDomainWhitelist.length > 0 || emailWhitelist.length > 0) {
      const domainMatch = emailDomainWhitelist?.includes(email.split("@")[1])
      const emailMatch = emailWhitelist?.includes(email)
      if (!domainMatch && !emailMatch) {
        return redirect(
          `/${localeString}/login?message=Email ${email} is not allowed to sign up.`
          // `/${localeString}/login?message=signupNotAllowed&email=${encodeURIComponent(email)}`
        )
      }
    }

    const cookieStore = cookies()
    const supabase = createClient(cookieStore)

    const { error } = await supabase.auth.signUp({
      email,
      password,
      options: {
        // USE IF YOU WANT TO SEND EMAIL VERIFICATION, ALSO CHANGE TOML FILE
        // emailRedirectTo: `${origin}/auth/callback`
      }
    })

    if (error) {
      console.error(error)
      return redirect(`/${localeString}/login?message=${error.message}`)
    }

    return redirect(`/${localeString}/setup`)

    // USE IF YOU WANT TO SEND EMAIL VERIFICATION, ALSO CHANGE TOML FILE
    // return redirect("/login?message=Check email to continue sign in process")
  }

  const handleResetPassword = async (formData: FormData) => {
    "use server"

    const origin = headers().get("origin")
    const email = formData.get("email") as string
    const cookieStore = cookies()
    const supabase = createClient(cookieStore)

    const { error } = await supabase.auth.resetPasswordForEmail(email, {
      redirectTo: `${origin}/auth/callback?next=${localeString}/login/password`
    })

    if (error) {
      return redirect(`/${localeString}/login?message=${error.message}`)
    }

   // const emailtoResetMessage = String(t("login.checkEmailToReset"))  // ← 这是字符串
    // return redirect(`/${localeString}/login?message=${emailtoResetMessage}`)
    return redirect(`/${localeString}/login?message=Check email to reset password`)
  }

 
  let translatedMessage: string | null = null;

  if (searchParams.message === "signupNotAllowed") {
    translatedMessage = t("login.signupNotAllowed", { email: searchParams.email });
  } else if (searchParams.message) {
    translatedMessage = t(`login.${searchParams.message}`);
  }

  return (
    <div className="flex w-full flex-1 flex-col justify-center gap-2 px-8 sm:max-w-md">
      <form
        className="animate-in text-foreground flex w-full flex-1 flex-col justify-center gap-2"
        action={signIn}
      >
        <Brand />

        <Label className="text-md mt-4" htmlFor="email">
          {t("login.email")}
        </Label>
        <Input
          className="mb-3 rounded-md border bg-inherit px-4 py-2"
          name="email"
          placeholder={t("login.emailPlaceholder")}
          required
        />

        <Label className="text-md" htmlFor="password">
        {t("login.password")}
        </Label>
        <Input
          className="mb-6 rounded-md border bg-inherit px-4 py-2"
          type="password"
          name="password"
          placeholder={t("login.passwordPlaceholder")} 
        />

        <SubmitButton className="mb-2 rounded-md bg-blue-700 px-4 py-2 text-white">
        {t("login.loginButton")}
        </SubmitButton>

        <SubmitButton
          formAction={signUp}
          className="border-foreground/20 mb-2 rounded-md border px-4 py-2"
        >
          {t("login.signUpButton")}
        </SubmitButton>

        <div className="text-muted-foreground mt-1 flex justify-center text-sm">
          <span className="mr-1">{t("login.forgotPassword")}</span>
          <button
            formAction={handleResetPassword}
            className="text-primary ml-1 underline hover:opacity-80"
          >
            {t("login.reset")}
          </button>
        </div>

        {/* {searchParams?.message && (
          <p className="bg-foreground/10 text-foreground mt-4 p-4 text-center">
            {searchParams.message}
          </p>
        )} */}

        {translatedMessage && (
          <p className="bg-foreground/10 text-foreground mt-4 p-4 text-center">
            {translatedMessage}
          </p>
        )}        

      </form>
    </div>
  )
}