'use client';

import { useState } from 'react';
import { Button } from './ui/button';
import { Input } from './ui/input';
import { useAuth } from './AuthProvider';
import { Lock, User, AlertCircle } from 'lucide-react';
import { useRegisterModal } from './modal/ModalStackProvider';

interface AuthModalProps {
  isOpen: boolean;
}

export function AuthModal({ isOpen }: AuthModalProps) {
  useRegisterModal(isOpen, { id: 'auth-modal', allowEscape: false, onClose: () => null });
  const { login } = useAuth();
  const [username, setUsername] = useState('');
  const [password, setPassword] = useState('');
  const [isLoading, setIsLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setIsLoading(true);
    setError(null);

    const success = await login(username, password);
    
    if (!success) {
      setError('Invalid username or password');
    }
    
    setIsLoading(false);
  };

  if (!isOpen) return null;

  return (
    <div className="fixed inset-0 backdrop-blur-sm bg-black/50 flex items-center justify-center z-50 p-4">
      <div className="bg-card rounded-lg shadow-xl max-w-md w-full border border-border">
        {/* Header */}
        <div className="flex items-center justify-center p-6 border-b border-border">
          <div className="flex items-center gap-3">
            <Lock className="h-8 w-8 text-primary" />
            <h2 className="text-2xl font-bold text-card-foreground">Authentication Required</h2>
          </div>
        </div>

        {/* Content */}
        <div className="p-6">
          <p className="text-muted-foreground text-center mb-6">
            Please enter your credentials to access the application.
          </p>

          <form onSubmit={handleSubmit} className="space-y-4">
            <div>
              <label htmlFor="username" className="block text-sm font-medium text-foreground mb-2">
                Username
              </label>
              <div className="relative">
                <User className="absolute left-3 top-1/2 transform -translate-y-1/2 h-4 w-4 text-muted-foreground" />
                <Input
                  id="username"
                  type="text"
                  placeholder="Enter your username"
                  value={username}
                  onChange={(e) => setUsername(e.target.value)}
                  disabled={isLoading}
                  className="pl-10"
                  required
                />
              </div>
            </div>

            <div>
              <label htmlFor="password" className="block text-sm font-medium text-foreground mb-2">
                Password
              </label>
              <div className="relative">
                <Lock className="absolute left-3 top-1/2 transform -translate-y-1/2 h-4 w-4 text-muted-foreground" />
                <Input
                  id="password"
                  type="password"
                  placeholder="Enter your password"
                  value={password}
                  onChange={(e) => setPassword(e.target.value)}
                  disabled={isLoading}
                  className="pl-10"
                  required
                />
              </div>
            </div>

            {error && (
              <div className="flex items-center gap-2 p-3 bg-error/10 text-error-foreground border border-error/20 rounded-md">
                <AlertCircle className="h-4 w-4" />
                <span className="text-sm">{error}</span>
              </div>
            )}

            <Button
              type="submit"
              disabled={isLoading || !username.trim() || !password.trim()}
              className="w-full"
            >
              {isLoading ? 'Signing In...' : 'Sign In'}
            </Button>
          </form>
        </div>
      </div>
    </div>
  );
}