rack-planner/client/src/components/auth/LoginPage.tsx

import { useState, type FormEvent } from 'react';
import { useNavigate } from 'react-router-dom';
import { toast } from 'sonner';
import { useAuthStore } from '../../store/useAuthStore';
import { Button } from '../ui/Button';

export function LoginPage() {
  const navigate = useNavigate();
  const { login } = useAuthStore();
  const [username, setUsername] = useState('');
  const [password, setPassword] = useState('');
  const [loading, setLoading] = useState(false);

  async function handleSubmit(e: FormEvent) {
    e.preventDefault();
    if (!username.trim() || !password) return;

    setLoading(true);
    try {
      await login(username.trim(), password);
      navigate('/rack', { replace: true });
    } catch (err) {
      toast.error(err instanceof Error ? err.message : 'Login failed');
    } finally {
      setLoading(false);
    }
  }

  return (
    <div className="min-h-screen bg-[#0f1117] flex items-center justify-center p-4">
      <div className="w-full max-w-sm">
        {/* Logo / wordmark */}
        <div className="text-center mb-8">
          <div className="inline-flex items-center gap-2 mb-2">
            <div className="w-8 h-8 bg-blue-500 rounded flex items-center justify-center">
              <svg
                width="18"
                height="18"
                viewBox="0 0 18 18"
                fill="none"
                xmlns="http://www.w3.org/2000/svg"
              >
                <rect x="1" y="2" width="16" height="3" rx="1" fill="white" />
                <rect x="1" y="7" width="16" height="3" rx="1" fill="white" opacity="0.7" />
                <rect x="1" y="12" width="16" height="3" rx="1" fill="white" opacity="0.4" />
              </svg>
            </div>
            <span className="text-xl font-bold text-white tracking-wider">RACKMAPPER</span>
          </div>
          <p className="text-slate-500 text-sm">Network infrastructure management</p>
        </div>

        {/* Card */}
        <form
          onSubmit={handleSubmit}
          className="bg-slate-800 border border-slate-700 rounded-xl p-6 space-y-4 shadow-2xl"
        >
          <div className="space-y-1">
            <label htmlFor="username" className="block text-sm font-medium text-slate-300">
              Username
            </label>
            <input
              id="username"
              type="text"
              autoComplete="username"
              autoFocus
              value={username}
              onChange={(e) => setUsername(e.target.value)}
              disabled={loading}
              className="w-full bg-slate-900 border border-slate-600 rounded-lg px-3 py-2 text-slate-100 text-sm placeholder:text-slate-600 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent disabled:opacity-50"
              placeholder="admin"
            />
          </div>

          <div className="space-y-1">
            <label htmlFor="password" className="block text-sm font-medium text-slate-300">
              Password
            </label>
            <input
              id="password"
              type="password"
              autoComplete="current-password"
              value={password}
              onChange={(e) => setPassword(e.target.value)}
              disabled={loading}
              className="w-full bg-slate-900 border border-slate-600 rounded-lg px-3 py-2 text-slate-100 text-sm placeholder:text-slate-600 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent disabled:opacity-50"
              placeholder="••••••••"
            />
          </div>

          <Button
            type="submit"
            disabled={loading || !username.trim() || !password}
            loading={loading}
            className="w-full mt-2"
          >
            Sign in
          </Button>
        </form>

        <p className="text-center text-xs text-slate-600 mt-4">
          Credentials are set via Docker environment variables.
        </p>
      </div>
    </div>
  );
}