using GeekDesk.Control.Windows;
using GeekDesk.Util;
using GeekDesk.ViewModel;
using GlobalHotKey;
using HandyControl.Data;
using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Interop;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace GeekDesk.Control.UserControls.Config
{
    /// <summary>
    /// 动作设置
    /// </summary>
    public partial class MotionControl : UserControl
    {
        private static bool hotkeyFinished = true; //热键设置结束
        private static KeyEventArgs prevKeyTemp; //上一个按键
        private static AppConfig appConfig = MainWindow.appData.AppConfig;

        public MotionControl()
        {
            InitializeComponent();
        }


        /// <summary>
        /// 注册热键按下
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void HotKeyDown(object sender, KeyEventArgs e)
        {
            if (!e.IsRepeat)
            {
                if (hotkeyFinished)
                {
                    appConfig.Hotkey = 0;
                    appConfig.HotkeyStr = "";
                    appConfig.HotkeyModifiers = 0;
                    hotkeyFinished = false;
                }
                //首次按下按键
                if (appConfig.HotkeyStr == null || appConfig.HotkeyStr.Length == 0)
                {
                    if (CheckModifierKeys(e))
                    {
                        //辅助键
                        appConfig.HotkeyStr = GetKeyName(e);
                        appConfig.HotkeyModifiers = GetModifierKeys(e);
                        prevKeyTemp = e;
                    }
                }
                else
                {
                    //非首次按下  需要判断前一个键值是否为辅助键
                    if (CheckModifierKeys(prevKeyTemp)
                        && ((e.Key >= Key.A && e.Key <= Key.Z)
                        || (e.Key >= Key.F1 && e.Key <= Key.F12)
                        || (e.Key >= Key.D0 && e.Key <= Key.D9)))
                    {
                        appConfig.Hotkey = e.Key;
                        appConfig.HotkeyStr += e.Key.ToString();
                        prevKeyTemp = e;
                    }
                    else if (CheckModifierKeys(e))
                    {
                        appConfig.HotkeyStr += GetKeyName(e);
                        appConfig.HotkeyModifiers |= GetModifierKeys(e);
                        prevKeyTemp = e;
                    }
                }
            }
        }

        private string GetKeyName(KeyEventArgs e)
        {
            Key key = e.Key;
            if (key == Key.LeftCtrl || key == Key.RightCtrl)
            {
                return "Ctrl + ";
            } else if (key == Key.LWin || key == Key.RWin)
            {
                return "Win + ";
            }
            else if (key == Key.LeftShift || key == Key.RightShift)
            {
                return "Shift + ";
            }
            else
            {
                return "Alt + ";
            }

        }

        private HotkeyModifiers GetModifierKeys(KeyEventArgs e)
        {
            Key key = e.Key;
            if (key == Key.LeftCtrl || key == Key.RightCtrl)
            {
                return HotkeyModifiers.MOD_CONTROL;
            }
            else if (key == Key.LWin || key == Key.RWin)
            {
                return HotkeyModifiers.MOD_WIN;
            }
            else if (key == Key.LeftShift || key == Key.RightShift)
            {
                return HotkeyModifiers.MOD_SHIFT;
            }
            else
            {
                return HotkeyModifiers.MOD_ALT;
            }
        }

        private bool CheckModifierKeys(KeyEventArgs e)
        {
            Key key = e.Key;
            return key == Key.LeftCtrl || key == Key.RightCtrl
                || key == Key.LWin || key == Key.RWin
                || key == Key.LeftShift || key == Key.RightShift
                || key == Key.LeftAlt || key == Key.RightAlt;
        }


        private void HotKeyUp(object sender, KeyEventArgs e)
        {
            hotkeyFinished = true;
            ConfigWindow cw = (ConfigWindow)Window.GetWindow(this);
            try
            {
                if (cw.mainWindow.hotKeyId != -1)
                {
                    Hotkey.UnRegist(new WindowInteropHelper(cw.mainWindow).Handle, Hotkey.keymap[cw.mainWindow.hotKeyId]);
                }
                cw.mainWindow.hotKeyId = Hotkey.Regist(cw.mainWindow, appConfig.HotkeyModifiers, appConfig.Hotkey, () =>
                {
                    if (cw.mainWindow.Visibility == Visibility.Collapsed)
                    {
                        cw.mainWindow.ShowApp();
                    }
                    else
                    {
                        cw.mainWindow.Visibility = Visibility.Collapsed;
                    }
                });
            } catch (Exception)
            {
                HandyControl.Controls.Growl.WarningGlobal("当前快捷键已被其它程序占用(" + appConfig.HotkeyStr + ")!");
            }
            
        }

        private void ShowApp(MainWindow mainWindow)
        {
            if (appConfig.FollowMouse)
            {
                ShowAppAndFollowMouse(mainWindow);
            }
            else
            {
                this.Visibility = Visibility.Visible;
            }
            Keyboard.Focus(this);
        }

        /// <summary>
        /// 随鼠标位置显示面板 (鼠标始终在中间)
        /// </summary>
        private void ShowAppAndFollowMouse(MainWindow mainWindow)
        {
            //获取鼠标位置
            System.Windows.Point p = MouseUtil.GetMousePosition();
            double left = SystemParameters.VirtualScreenLeft;
            double top = SystemParameters.VirtualScreenTop;
            double width = SystemParameters.VirtualScreenWidth;
            double height = SystemParameters.VirtualScreenHeight;
            double right = width - Math.Abs(left);
            double bottom = height - Math.Abs(top);


            if (p.X - mainWindow.Width / 2 < left)
            {
                //判断是否在最左边缘
                mainWindow.Left = left;
            }
            else if (p.X + mainWindow.Width / 2 > right)
            {
                //判断是否在最右边缘
                mainWindow.Left = right - mainWindow.Width;
            }
            else
            {
                mainWindow.Left = p.X - mainWindow.Width / 2;
            }


            if (p.Y - mainWindow.Height / 2 < top)
            {
                //判断是否在最上边缘
                mainWindow.Top = top;
            }
            else if (p.Y + mainWindow.Height / 2 > bottom)
            {
                //判断是否在最下边缘
                mainWindow.Top = bottom - mainWindow.Height;
            }
            else
            {
                mainWindow.Top = p.Y - mainWindow.Height / 2;
            }

            mainWindow.Visibility = Visibility.Visible;
        }
    }
}