betterNAS/apps/web/app/login/page.tsx

"use client";

import { useState } from "react";
import { useRouter } from "next/navigation";
import { login, register, ApiError } from "@/lib/api";
import { Button } from "@/components/ui/button";
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";

export default function LoginPage() {
  const router = useRouter();
  const [username, setUsername] = useState("");
  const [password, setPassword] = useState("");
  const [error, setError] = useState<string | null>(null);
  const [loading, setLoading] = useState(false);
  const [mode, setMode] = useState<"login" | "register">("login");

  async function handleSubmit(event: React.FormEvent) {
    event.preventDefault();
    setError(null);
    setLoading(true);

    try {
      if (mode === "login") {
        await login(username, password);
      } else {
        await register(username, password);
      }
      router.push("/");
    } catch (err) {
      if (err instanceof ApiError) {
        setError(err.message);
      } else {
        setError("Something went wrong");
      }
    } finally {
      setLoading(false);
    }
  }

  return (
    <main className="flex min-h-screen items-center justify-center bg-background px-4">
      <Card className="w-full max-w-sm">
        <CardHeader className="text-center">
          <p className="text-xs font-medium uppercase tracking-widest text-muted-foreground">
            betterNAS
          </p>
          <CardTitle className="text-xl">
            {mode === "login" ? "Sign in" : "Create account"}
          </CardTitle>
          <CardDescription>
            {mode === "login"
              ? "Sign in to your betterNAS control plane with the same credentials you use for the node agent and Finder."
              : "Create your betterNAS account. You will use the same username and password for the web app, node agent, and Finder."}
          </CardDescription>
        </CardHeader>
        <CardContent>
          <form onSubmit={handleSubmit} className="flex flex-col gap-4">
            <div className="flex flex-col gap-1.5">
              <label
                htmlFor="username"
                className="text-sm font-medium text-foreground"
              >
                Username
              </label>
              <input
                id="username"
                type="text"
                autoComplete="username"
                required
                minLength={3}
                maxLength={64}
                value={username}
                onChange={(e) => setUsername(e.target.value)}
                className="rounded-lg border border-input bg-background px-3 py-2 text-sm outline-none ring-ring focus:ring-2"
                placeholder="admin"
              />
            </div>

            <div className="flex flex-col gap-1.5">
              <label
                htmlFor="password"
                className="text-sm font-medium text-foreground"
              >
                Password
              </label>
              <input
                id="password"
                type="password"
                autoComplete={
                  mode === "login" ? "current-password" : "new-password"
                }
                required
                minLength={8}
                value={password}
                onChange={(e) => setPassword(e.target.value)}
                className="rounded-lg border border-input bg-background px-3 py-2 text-sm outline-none ring-ring focus:ring-2"
              />
            </div>

            {error && <p className="text-sm text-destructive">{error}</p>}

            <Button type="submit" disabled={loading} className="w-full">
              {loading
                ? "..."
                : mode === "login"
                  ? "Sign in"
                  : "Create account"}
            </Button>

            <p className="text-center text-sm text-muted-foreground">
              {mode === "login" ? (
                <>
                  No account?{" "}
                  <button
                    type="button"
                    onClick={() => {
                      setMode("register");
                      setError(null);
                    }}
                    className="text-foreground underline underline-offset-2"
                  >
                    Create one
                  </button>
                </>
              ) : (
                <>
                  Already have an account?{" "}
                  <button
                    type="button"
                    onClick={() => {
                      setMode("login");
                      setError(null);
                    }}
                    className="text-foreground underline underline-offset-2"
                  >
                    Sign in
                  </button>
                </>
              )}
            </p>
          </form>
        </CardContent>
      </Card>
    </main>
  );
}