import React, { useState } from 'react';
import { Loader, 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-gray-100 flex items-center justify-center p-4">
            <div className="bg-white rounded-lg shadow-xl max-w-md w-full p-8">
                <div className="text-center mb-8">
                    <div className="w-16 h-16 bg-[#0476D9] rounded-full flex items-center justify-center mx-auto mb-4">
                        <Lock className="w-8 h-8 text-white" />
                    </div>
                    <h1 className="text-2xl font-bold text-gray-900">CVE Dashboard</h1>
                    <p className="text-gray-600 mt-2">Sign in to access the dashboard</p>
                </div>

                {error && (
                    <div className="mb-6 p-4 bg-red-50 border border-red-200 rounded-lg flex items-start gap-3">
                        <AlertCircle className="w-5 h-5 text-red-600 flex-shrink-0 mt-0.5" />
                        <p className="text-sm text-red-700">{error}</p>
                    </div>
                )}

                <form onSubmit={handleSubmit} className="space-y-6">
                    <div>
                        <label htmlFor="username" className="block text-sm font-medium text-gray-700 mb-2">
                            Username
                        </label>
                        <div className="relative">
                            <User className="w-5 h-5 text-gray-400 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="w-full pl-10 pr-4 py-3 border border-gray-300 rounded-lg focus:ring-2 focus:ring-[#0476D9] focus:border-transparent"
                                placeholder="Enter your username"
                                disabled={loading}
                            />
                        </div>
                    </div>

                    <div>
                        <label htmlFor="password" className="block text-sm font-medium text-gray-700 mb-2">
                            Password
                        </label>
                        <div className="relative">
                            <Lock className="w-5 h-5 text-gray-400 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="w-full pl-10 pr-4 py-3 border border-gray-300 rounded-lg focus:ring-2 focus:ring-[#0476D9] focus:border-transparent"
                                placeholder="Enter your password"
                                disabled={loading}
                            />
                        </div>
                    </div>

                    <button
                        type="submit"
                        disabled={loading}
                        className="w-full py-3 bg-[#0476D9] text-white rounded-lg hover:bg-[#0360B8] transition-colors font-medium shadow-md disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
                    >
                        {loading ? (
                            <>
                                <Loader className="w-5 h-5 animate-spin" />
                                Signing in...
                            </>
                        ) : (
                            'Sign In'
                        )}
                    </button>
                </form>

                <div className="mt-6 pt-6 border-t border-gray-200">
                    <p className="text-sm text-gray-500 text-center">
                        Default admin credentials: admin / admin123
                    </p>
                </div>
            </div>
        </div>
    );
}