import { AuthError } from "next-auth";
import { redirect } from "next/navigation";

import { auth, signIn } from "@/src/auth";

type LoginPageProps = {
  searchParams?: Promise<{
    error?: string;
  }>;
};

async function login(formData: FormData) {
  "use server";

  const identifier = String(formData.get("identifier") ?? "").trim();

  console.log("[login-page] Submit login ricevuto", {
    hasIdentifier: Boolean(identifier),
    hasPassword: Boolean(formData.get("password")),
  });

  try {
    await signIn("credentials", {
      identifier,
      password: formData.get("password"),
      redirectTo: "/",
    });
  } catch (error) {
    if (error instanceof AuthError) {
      console.log("[login-page] AuthError durante login", {
        type: error.type,
        cause: error.cause,
      });
      redirect("/login?error=CredentialsSignin");
    }

    console.error("[login-page] Errore inatteso durante login", {
      error: error instanceof Error ? error.message : String(error),
    });
    throw error;
  }
}

export default async function LoginPage({ searchParams }: LoginPageProps) {
  const session = await auth();

  if (session?.user) {
    redirect("/");
  }

  const params = await searchParams;
  const hasError = params?.error === "CredentialsSignin";

  return (
    <main className="flex min-h-[calc(100vh-4rem)] items-center justify-center bg-zinc-50 px-4 py-12">
      <section className="w-full max-w-sm rounded-lg border border-zinc-200 bg-white p-6 shadow-sm">
        <div className="mb-6">
          <h1 className="text-2xl font-semibold text-zinc-950">Accesso</h1>
          <p className="mt-2 text-sm text-zinc-600">
            Entra in MagRicambi con utente o email.
          </p>
        </div>

        {hasError ? (
          <p className="mb-4 rounded-md border border-red-200 bg-red-50 px-3 py-2 text-sm text-red-700">
            Credenziali non valide oppure utente non attivo.
          </p>
        ) : null}

        <form action={login} className="space-y-4">
          <label className="block">
            <span className="text-sm font-medium text-zinc-700">Utente o email</span>
            <input
              required
              autoComplete="username"
              name="identifier"
              type="text"
              className="mt-1 w-full rounded-md border border-zinc-300 px-3 py-2 text-zinc-950 outline-none transition-colors focus:border-zinc-900"
            />
          </label>

          <label className="block">
            <span className="text-sm font-medium text-zinc-700">Password</span>
            <input
              required
              autoComplete="current-password"
              name="password"
              type="password"
              className="mt-1 w-full rounded-md border border-zinc-300 px-3 py-2 text-zinc-950 outline-none transition-colors focus:border-zinc-900"
            />
          </label>

          <button
            type="submit"
            className="w-full rounded-md bg-zinc-950 px-4 py-2 font-medium text-white transition-colors hover:bg-zinc-800"
          >
            Accedi
          </button>
        </form>
      </section>
    </main>
  );
}