using System;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;
using vCloud.GeneratePackages.Tool.ViewModels;
using Vinno.IUS.Common.Log;

namespace vCloud.GeneratePackages.Tool
{
    public interface IDescriptionUpdater
    {
        /// <summary>
        /// Update Discription
        /// </summary>
        /// <param name="desc"></param>
        void Update(string desc, bool writeLogger = true);

        /// <summary>
        /// The event Update Discription
        /// </summary>
        event EventHandler<string> DescriptionUpdated;
    }

    public class DescriptionUpdater : IDescriptionUpdater
    {
        /// <summary>
        /// The event Update Discription
        /// </summary>
        public event EventHandler<string> DescriptionUpdated;

        /// <summary>
        /// Update Discription
        /// </summary>
        /// <param name="desc"></param>
        public void Update(string desc, bool writeLogger = true)
        {
            if (writeLogger)
            {
                Logger.WriteLineInfo(desc);
            }
            DescriptionUpdated.Invoke(this, desc);            
        }
    }

    /// <summary>
    /// ModalActionWindow.xaml 的交互逻辑
    /// </summary>
    public partial class ModalActionWindow : Window
    {
        ModalActionViewModel _viewModel;
        private const int GWL_STYLE = -16;
        private const int WS_SYSMENU = 0x80000;
        [DllImport("user32.dll", SetLastError = true)]
        private static extern int GetWindowLong(IntPtr hWnd, int nIndex);
        [DllImport("user32.dll")]
        private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
        public ModalActionWindow(Action action, IDescriptionUpdater descriptionUpdater, string descpription = null, string title = null)
        {            
            InitializeComponent();
            Loaded += OnWindow_Loaded;
             _viewModel = new ModalActionViewModel(action, descriptionUpdater, descpription, title);
            _viewModel.ClosedRequest += OnClose;
            DataContext = _viewModel;
        }

        private void OnWindow_Loaded(object sender, RoutedEventArgs e)
        {
            var hwnd = new WindowInteropHelper(this).Handle;
            SetWindowLong(hwnd, GWL_STYLE, GetWindowLong(hwnd, GWL_STYLE) & ~WS_SYSMENU);
        }



        /// <summary>
        /// Update description
        /// </summary>
        /// <param name="desc"></param>
        public void Update(string desc)
        {
            Dispatcher.Invoke(()=> {
                if (_viewModel != null)
                { 
                    _viewModel.Description = desc;
                }
            });
        }

        private void OnClose(object sender, EventArgs e)
        {
            Loaded -= OnWindow_Loaded;
            _viewModel.ClosedRequest -= OnClose;
            Close();
        }
    }
}