namespace DDD
{
    public class BaseViewModelUi<TViewModel> : BaseUi where TViewModel : SimpleViewModel
    {
        protected TViewModel _viewModel;

        protected override void Awake()
        {
            base.Awake();

            _viewModel = GetComponent<TViewModel>();
        }

        protected override void OnOpenedEvents()
        {
            base.OnOpenedEvents();
            
            if (_viewModel && _bindingContext != null)
            {
                _bindingContext.SetDataContext(_viewModel);
                _viewModel.PropertyChanged += OnViewModelPropertyChanged;
            }
        }
        
        protected override void OnClosedEvents()
        {
            base.OnClosedEvents();
            
            if (_viewModel != null)
            {
                _viewModel.PropertyChanged -= OnViewModelPropertyChanged;
            }
        }

        public override void OpenPanel()
        {
            base.OpenPanel();
            
            _viewModel?.Initialize();
        }

        public override void ClosePanel()
        {
            base.ClosePanel();
            
            _viewModel?.Cleanup();
        }
        
        /// <summary>
        /// ViewModel 메서드 호출 헬퍼
        /// </summary>
        protected void InvokeViewModelMethod(string methodName, params object[] parameters)
        {
            if (_viewModel == null) return;

            var method = _viewModel.GetType().GetMethod(methodName);
            method?.Invoke(_viewModel, parameters);
        }

        /// <summary>
        /// ViewModel 속성 설정 헬퍼
        /// </summary>
        protected void SetViewModelProperty(string propertyName, object value)
        {
            if (_viewModel == null) return;

            var property = _viewModel.GetType().GetProperty(propertyName);
            if (property != null && property.CanWrite)
            {
                property.SetValue(_viewModel, value);
            }
        }
    }
}