import React, { useState } from 'react';
import { Card } from '../../ui/card';
import { Button } from '../../ui/button';
import { Input } from '../../ui/input';
import { Lock, Key, Plus, AlertCircle } from 'lucide-react';
import { useToast } from '../../../context/ToastContext';
import { PasswordStrengthIndicator } from '../../auth/PasswordStrengthIndicator';
import { TwoFactorSetup } from './TwoFactorSetup';
import { PasskeyModal } from './PasskeyModal';
import { SessionManagement } from './SessionManagement';
import { LoginHistory } from './LoginHistory';

export const SecuritySettings: React.FC = () => {
  const { addToast } = useToast();
  const [view, setView] = useState<'main' | '2fa' | 'sessions' | 'history'>('main');
  
  // Forms & Modals
  const [currentPassword, setCurrentPassword] = useState('');
  const [newPassword, setNewPassword] = useState('');
  const [confirmPassword, setConfirmPassword] = useState('');
  const [showPasskeyModal, setShowPasskeyModal] = useState(false);
  const [is2FAEnabled, setIs2FAEnabled] = useState(false);

  const handlePasswordUpdate = () => {
    if (newPassword !== confirmPassword) {
      addToast("Passwords do not match", "error");
      return;
    }
    addToast("Password successfully updated", "success");
    setCurrentPassword('');
    setNewPassword('');
    setConfirmPassword('');
  };

  if (view === '2fa') {
    return <TwoFactorSetup onBack={() => setView('main')} onComplete={() => { setIs2FAEnabled(true); setView('main'); }} />;
  }

  return (
    <div className="space-y-8 animate-fadeIn pb-10">
      
      {/* 1. PASSWORD CHANGE */}
      <Card variant="default">
        <h3 className="text-xl font-bold text-white mb-6 flex items-center gap-2">
          <Lock className="w-5 h-5 text-kodo-cyan" /> Password & Authentication
        </h3>
        
        <div className="grid grid-cols-1 lg:grid-cols-2 gap-8">
          <div className="space-y-4">
            <Input 
              type="password" 
              label="Current Password" 
              value={currentPassword} 
              onChange={(e) => setCurrentPassword(e.target.value)} 
            />
            <div className="relative">
              <Input 
                type="password" 
                label="New Password" 
                value={newPassword} 
                onChange={(e) => setNewPassword(e.target.value)} 
              />
              {newPassword && <PasswordStrengthIndicator password={newPassword} />}
            </div>
            <Input 
              type="password" 
              label="Confirm New Password" 
              value={confirmPassword} 
              onChange={(e) => setConfirmPassword(e.target.value)} 
            />
            <div className="pt-2 flex justify-end">
              <Button variant="primary" onClick={handlePasswordUpdate} disabled={!currentPassword || !newPassword}>
                Update Password
              </Button>
            </div>
          </div>

          <div className="space-y-6">
            {/* 2FA Summary */}
            <div className="bg-kodo-ink p-6 rounded-xl border border-kodo-steel">
              <div className="flex justify-between items-start mb-4">
                <div>
                  <h4 className="font-bold text-white text-sm">Two-Factor Authentication</h4>
                  <p className="text-xs text-gray-400 mt-1">Add an extra layer of security to your account.</p>
                </div>
                {is2FAEnabled ? (
                  <span className="text-kodo-lime flex items-center gap-1 text-xs font-bold border border-kodo-lime/30 px-2 py-1 rounded bg-kodo-lime/5"><CheckCircle className="w-3 h-3" /> ENABLED</span>
                ) : (
                  <span className="text-kodo-red flex items-center gap-1 text-xs font-bold border border-kodo-red/30 px-2 py-1 rounded bg-kodo-red/5"><AlertCircle className="w-3 h-3" /> DISABLED</span>
                )}
              </div>
              <Button 
                variant="secondary" 
                className="w-full" 
                onClick={() => setView('2fa')}
              >
                {is2FAEnabled ? 'Manage 2FA Settings' : 'Enable 2FA'}
              </Button>
            </div>

            {/* Passkeys */}
            <div className="bg-kodo-ink p-6 rounded-xl border border-kodo-steel">
              <div className="flex justify-between items-start mb-4">
                <div>
                  <h4 className="font-bold text-white text-sm flex items-center gap-2">
                    <Key className="w-4 h-4 text-kodo-gold" /> Passkeys
                  </h4>
                  <p className="text-xs text-gray-400 mt-1">Sign in with FaceID, TouchID, or device PIN.</p>
                </div>
                <Button variant="ghost" size="icon" onClick={() => setShowPasskeyModal(true)}><Plus className="w-4 h-4" /></Button>
              </div>
              <div className="space-y-2">
                <div className="flex justify-between items-center text-sm p-2 rounded bg-white/5">
                  <span className="text-gray-300">MacBook Pro (Chrome)</span>
                  <span className="text-xs text-gray-500">Added 2d ago</span>
                </div>
              </div>
            </div>
          </div>
        </div>
      </Card>

      {/* 2. SESSIONS & HISTORY */}
      <SessionManagement />
      <LoginHistory />

      {/* MODALS */}
      {showPasskeyModal && (
        <PasskeyModal 
          onClose={() => setShowPasskeyModal(false)} 
          onSuccess={() => addToast("Passkey registered", "success")} 
        />
      )}
    </div>
  );
};