claude-code-usage-dashboard/client/components/LoginPage.tsx

import React, { useState } from 'react';

interface LoginPageProps {
  onLogin: (apiKey: string) => void;
  isLoading: boolean;
  error: string;
}

export function LoginPage({ onLogin, isLoading, error }: LoginPageProps) {
  const [apiKey, setApiKey] = useState('');
  const [showApiKey, setShowApiKey] = useState(false);

  const handleSubmit = (e: React.FormEvent) => {
    e.preventDefault();
    if (apiKey.trim()) {
      onLogin(apiKey.trim());
    }
  };

  return (
    <div className="min-h-screen bg-background flex flex-col justify-center py-12 sm:px-6 lg:px-8">
      <div className="sm:mx-auto sm:w-full sm:max-w-md">
        <div className="text-center">
          <h1 className="text-3xl font-bold text-foreground">Claude Code Usage Dashboard</h1>
          <p className="mt-2 text-sm text-muted-foreground">
            Monitor your API usage and billing across different periods
          </p>
        </div>
      </div>

      <div className="mt-8 sm:mx-auto sm:w-full sm:max-w-md">
        <div className="bg-card py-8 px-4 shadow-sm border border-border rounded-lg sm:px-10">
          <form className="space-y-6" onSubmit={handleSubmit}>
            <div>
              <label htmlFor="api-key" className="block text-sm font-medium text-card-foreground">
                API Key
              </label>
              <div className="mt-1 relative">
                <input
                  id="api-key"
                  name="api-key"
                  type={showApiKey ? 'text' : 'password'}
                  required
                  value={apiKey}
                  onChange={(e) => setApiKey(e.target.value)}
                  className="appearance-none block w-full px-3 py-2 pr-10 border border-border rounded-md shadow-sm placeholder:text-muted-foreground focus:outline-none focus:ring-2 focus:ring-ring focus:border-ring sm:text-sm bg-background text-foreground"
                  placeholder="Enter your API key"
                  disabled={isLoading}
                />
                <button
                  type="button"
                  onClick={() => setShowApiKey(!showApiKey)}
                  className="absolute inset-y-0 right-0 pr-3 flex items-center text-sm leading-5"
                >
                  {showApiKey ? (
                    <svg className="h-5 w-5 text-muted-foreground" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M13.875 18.825A10.05 10.05 0 0112 19c-4.478 0-8.268-2.943-9.543-7a9.97 9.97 0 011.563-3.029m5.858.908a3 3 0 114.243 4.243M9.878 9.878l4.242 4.242M9.878 9.878L8.464 8.464l1.414-1.414M14.12 14.12l1.415 1.415" />
                    </svg>
                  ) : (
                    <svg className="h-5 w-5 text-muted-foreground" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z" />
                    </svg>
                  )}
                </button>
              </div>
            </div>

            {error && (
              <div className="rounded-md bg-destructive/10 p-4">
                <div className="flex">
                  <div className="flex-shrink-0">
                    <svg className="h-5 w-5 text-destructive" viewBox="0 0 20 20" fill="currentColor">
                      <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clipRule="evenodd" />
                    </svg>
                  </div>
                  <div className="ml-3">
                    <p className="text-sm font-medium text-destructive">{error}</p>
                  </div>
                </div>
              </div>
            )}

            <div>
              <button
                type="submit"
                disabled={isLoading || !apiKey.trim()}
                className="w-full flex justify-center py-2 px-4 border border-transparent rounded-md shadow-sm text-sm font-medium text-primary-foreground bg-primary hover:bg-primary/90 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-ring disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
              >
                {isLoading ? (
                  <>
                    <svg className="animate-spin -ml-1 mr-3 h-5 w-5 text-primary-foreground" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24">
                      <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4"></circle>
                      <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
                    </svg>
                    Verifying...
                  </>
                ) : (
                  'Access Dashboard'
                )}
              </button>
            </div>
          </form>

          <div className="mt-6">
            <div className="text-center text-sm text-muted-foreground">
              <p>Enter your API key to view your usage statistics and billing information.</p>
            </div>
          </div>
        </div>
      </div>
    </div>
  );
}