using System.Windows;
using System.Windows.Media;
using Caliburn.Metadata;
using Caliburn.Services;

namespace Caliburn.Messaging
{
    public class ActionMessageSender
    {
        private readonly ActionMessage _message;
        private readonly DependencyObject _source;

        public ActionMessageSender(DependencyObject source, ActionMessage message)
        {
            _message = message;
            _source = source;
        }

        public virtual void Send()
        {
            Send(_source, _source);
        }

        protected virtual void Send(DependencyObject currentSource, DependencyObject originalSource)
        {
            if(currentSource == null) return;

            IPresenterManager presenterManager = DI.Resolve<IPresenterManager>();
            PresenterBinding binding = presenterManager.GetBinding(currentSource);

            if(binding == PresenterBinding.NotFound) return;

            object presenter = binding.Presenter;

            PresenterInfo presenterInfo =
                presenterManager.GetInfo(presenter.GetType());

            ActionInfo actionInfo = presenterInfo.FindAction(_message.Action);

            if(actionInfo != null) actionInfo.Execute(presenter, _message, originalSource);
            else Send(VisualTreeHelper.GetParent(binding.Target), originalSource);
        }
    }
}