import React, { useState } from 'react';
import { AlertCircle, Lock, User } from 'lucide-react';
import { useAuth } from '../contexts/AuthContext';

export default function LoginForm() {
    const [username, setUsername] = useState('');
    const [password, setPassword] = useState('');
    const [loading, setLoading] = useState(false);
    const [error, setError] = useState('');
    const { login } = useAuth();

    const handleSubmit = async (e) => {
        e.preventDefault();
        setError('');
        setLoading(true);

        const result = await login(username, password);

        if (!result.success) {
            setError(result.error);
        }

        setLoading(false);
    };

    return (
        <div className="min-h-screen bg-intel-darkest grid-bg flex items-center justify-center p-4 relative overflow-hidden fade-in">
            {/* Scanning line effect */}
            <div className="scan-line"></div>

            <div className="intel-card rounded-lg shadow-2xl max-w-md w-full p-8 border-intel-accent relative z-10">
                <div className="text-center mb-8">
                    <div className="w-16 h-16 bg-gradient-to-br from-intel-accent to-intel-accent-dim rounded-full flex items-center justify-center mx-auto mb-4 shadow-lg" style={{boxShadow: '0 0 30px rgba(0, 217, 255, 0.4)'}}>
                        <Lock className="w-8 h-8 text-intel-darkest" />
                    </div>
                    <h1 className="text-3xl font-bold text-intel-accent font-mono tracking-tight">CVE INTEL</h1>
                    <p className="text-gray-400 mt-2 font-sans text-sm">Threat Intelligence Access Portal</p>
                </div>

                {error && (
                    <div className="mb-6 p-4 bg-intel-danger/10 border border-intel-danger/30 rounded flex items-start gap-3">
                        <AlertCircle className="w-5 h-5 text-intel-danger flex-shrink-0 mt-0.5" />
                        <p className="text-sm text-gray-300">{error}</p>
                    </div>
                )}

                <form onSubmit={handleSubmit} className="space-y-6">
                    <div>
                        <label htmlFor="username" className="block text-xs font-medium text-gray-400 mb-2 uppercase tracking-wider">
                            Username
                        </label>
                        <div className="relative">
                            <User className="w-5 h-5 text-gray-500 absolute left-3 top-1/2 transform -translate-y-1/2" />
                            <input
                                id="username"
                                type="text"
                                required
                                value={username}
                                onChange={(e) => setUsername(e.target.value)}
                                className="intel-input w-full pl-10"
                                placeholder="Enter username"
                                disabled={loading}
                            />
                        </div>
                    </div>

                    <div>
                        <label htmlFor="password" className="block text-xs font-medium text-gray-400 mb-2 uppercase tracking-wider">
                            Password
                        </label>
                        <div className="relative">
                            <Lock className="w-5 h-5 text-gray-500 absolute left-3 top-1/2 transform -translate-y-1/2" />
                            <input
                                id="password"
                                type="password"
                                required
                                value={password}
                                onChange={(e) => setPassword(e.target.value)}
                                className="intel-input w-full pl-10"
                                placeholder="Enter password"
                                disabled={loading}
                            />
                        </div>
                    </div>

                    <button
                        type="submit"
                        disabled={loading}
                        className="w-full intel-button intel-button-primary py-3 disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
                    >
                        {loading ? (
                            <>
                                <div className="loading-spinner w-5 h-5"></div>
                                <span className="font-mono uppercase tracking-wider">Authenticating...</span>
                            </>
                        ) : (
                            <span className="font-mono uppercase tracking-wider">Access System</span>
                        )}
                    </button>
                </form>

                <div className="mt-6 pt-6 border-t border-intel-grid">
                    <p className="text-sm text-gray-500 text-center font-mono">
                        Default: <span className="text-intel-accent">admin</span> / <span className="text-intel-accent">admin123</span>
                    </p>
                </div>
            </div>
        </div>
    );
}