import React, { useState } from 'react';
import { login, getAzureLoginUrl } from '../graphService';
import { User, AppSettings } from '../types';

interface LoginFormProps {
    settings: AppSettings;
    onLoginSuccess: (user: User) => void;
    onCancel: () => void;
}

const LoginForm: React.FC<LoginFormProps> = ({ settings, onLoginSuccess, onCancel }) => {
    const [username, setUsername] = useState('');
    const [password, setPassword] = useState('');
    const [authSource, setAuthSource] = useState<'local' | 'ldap'>('local');
    const [error, setError] = useState('');
    const [isLoading, setIsLoading] = useState(false);

    const handleLogin = async (e: React.FormEvent) => {
        e.preventDefault();
        if (!username || !password) {
            setError("Username and password are required.");
            return;
        }
        setIsLoading(true);
        setError('');
        try {
            const data = await login(username, password, authSource);
            console.log("[LOGIN DEBUG] Server Response:", data);
            
            if (data && (data.user || data.success === true)) {
                // PHP might return {success: true, user: {...}} or just {user: {...}}
                const userObj = data.user || data; 
                onLoginSuccess(userObj as User);
            } else {
                setError(data?.error || "Authentication failed: No user data returned.");
            }
        } catch (err: any) {
            console.error("[LOGIN ERROR]", err);
            setError(err.message || 'The server rejected these credentials.');
        } finally {
            setIsLoading(false);
        }
    };

    const handleAzureLogin = async () => {
        setIsLoading(true);
        try {
            const { url } = await getAzureLoginUrl();
            window.location.href = url;
        } catch (err: any) {
            setError(err.message);
            setIsLoading(false);
        }
    };

    // Safety check for settings object
    if (!settings) return null;

    return (
        <div className="fixed inset-0 bg-slate-950/80 flex justify-center items-center z-50 p-4 backdrop-blur-sm">
            <div className="bg-slate-900 p-8 rounded-2xl shadow-2xl w-full max-w-sm border border-slate-800 animate-in fade-in zoom-in duration-200">
                <div className="text-center mb-8">
                    <h2 className="text-2xl font-bold text-white mb-1">
                        System Login
                    </h2>
                    <p className="text-xs text-slate-500">Secure License Repository</p>
                </div>

                {error && (
                    <div className="bg-red-500/10 border border-red-500/50 text-red-400 text-[10px] font-mono p-3 rounded-lg mb-6 text-center break-words">
                        {error}
                    </div>
                )}

                <div className="space-y-4">
                    {settings?.azure_enabled && (
                        <button 
                            onClick={handleAzureLogin}
                            disabled={isLoading}
                            className="w-full flex items-center justify-center gap-3 bg-white hover:bg-gray-100 text-slate-900 font-bold py-2.5 px-4 rounded-xl transition-all disabled:opacity-50"
                        >
                            <svg className="w-4 h-4" viewBox="0 0 21 21" xmlns="http://www.w3.org/2000/svg"><path d="m0 0h10.1v10.1h-10.1z" fill="#f35325"/><path d="m10.9 0h10.1v10.1h-10.1z" fill="#81bc06"/><path d="m0 10.9h10.1v10.1h-10.1z" fill="#05a6f0"/><path d="m10.9 10.9h10.1v10.1h-10.1z" fill="#ffba08"/></svg>
                            Entra ID SSO
                        </button>
                    )}

                    <form onSubmit={handleLogin} className="space-y-4">
                        {settings?.ldap_enabled && (
                            <div className="grid grid-cols-2 gap-1 p-1 bg-slate-950 rounded-lg border border-slate-800">
                                <button type="button" onClick={() => setAuthSource('local')} className={`py-1.5 text-xs font-bold rounded-md transition-all ${authSource === 'local' ? 'bg-slate-800 text-cyan-400' : 'text-slate-500'}`}>Local</button>
                                <button type="button" onClick={() => setAuthSource('ldap')} className={`py-1.5 text-xs font-bold rounded-md transition-all ${authSource === 'ldap' ? 'bg-slate-800 text-cyan-400' : 'text-slate-500'}`}>LDAP</button>
                            </div>
                        )}

                        <div>
                            <label className="block text-[10px] font-bold text-slate-500 uppercase mb-1 ml-1 tracking-widest">Username</label>
                            <input 
                                type="text" 
                                value={username} 
                                onChange={e => setUsername(e.target.value)} 
                                className="w-full bg-slate-950 border border-slate-800 rounded-xl p-3 text-sm text-gray-200 focus:outline-none focus:border-cyan-500 transition-all shadow-inner" 
                                placeholder="Username" 
                                autoFocus 
                            />
                        </div>
                        <div>
                            <label className="block text-[10px] font-bold text-slate-500 uppercase mb-1 ml-1 tracking-widest">Password</label>
                            <input 
                                type="password" 
                                value={password} 
                                onChange={e => setPassword(e.target.value)} 
                                className="w-full bg-slate-950 border border-slate-800 rounded-xl p-3 text-sm text-gray-200 focus:outline-none focus:border-cyan-500 transition-all shadow-inner" 
                                placeholder="••••••••" 
                            />
                        </div>

                        <div className="flex gap-3 pt-2">
                            <button type="button" onClick={onCancel} className="flex-1 bg-slate-800 hover:bg-slate-700 text-slate-400 text-sm font-bold py-3 rounded-xl border border-slate-700 transition-all">Cancel</button>
                            <button type="submit" disabled={isLoading} className="flex-1 bg-cyan-600 hover:bg-cyan-500 text-white text-sm font-bold py-3 rounded-xl transition-all shadow-lg active:scale-95 disabled:opacity-50">
                                {isLoading ? 'Authenticating...' : 'Sign In'}
                            </button>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    );
};

export default LoginForm;