using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Threading;
using JD.Interfaces.Remoting;
using JD.Plugin.WPF.Module.ViewModel;
using Plume.WPF.Mvvm;

namespace JD.Plugin.WPF.Module.Views
{
    public class PluginCollection : BindableBase, IEnumerable<PluginViewModel>
    {
        private readonly Dispatcher _dispatcher;
        private PluginViewModel[] _plugins;

        public PluginCollection(Dispatcher dispatcher, params IPlugin[] plugins)
        {
            _dispatcher = dispatcher;
            ProcessInnerCollection(plugins);
        }

        public PluginCollection(params IPlugin[] plugins) : this(null, plugins)
        {
        }

        private void ProcessInnerCollection(IPlugin[] plugins)
        {
            List<PluginViewModel> pluginViewModels = new List<PluginViewModel>(plugins.Length);
            foreach (IPlugin plugin in plugins.ToArray())
            {
                plugin.ConnectedChanged += Plugin_ConnectedChanged;
                PluginViewModel pluginvm = new PluginViewModel { IsConnected = plugin.IsConnected, Name = plugin.Name };
                pluginViewModels.Add(pluginvm);
            }

            Plugins = pluginViewModels.ToArray();
        }

        public PluginViewModel[] Plugins
        {
            get => _plugins;
            set => SetProperty(ref _plugins, value);
        }
        
        private void Plugin_ConnectedChanged(object sender, IPlugin e)
        {
            PluginViewModel pluginViewModel = Plugins.Single(p => p.Name == e.Name);

            if (_dispatcher != null)
            {
                _dispatcher.Invoke(() => {
                    pluginViewModel.IsConnected = e.IsConnected;
                });
            }
            else
            {
                pluginViewModel.IsConnected = e.IsConnected;
            }
        }

        /// <inheritdoc />
        public IEnumerator<PluginViewModel> GetEnumerator()
        {
            return _plugins.ToList().GetEnumerator();
        }

        /// <inheritdoc />
        IEnumerator IEnumerable.GetEnumerator()
        {
            return _plugins.GetEnumerator();
        }
    }
}