using System;
using Android.Content;
using Android.Views;
using Android.Support.V4.View;
using Android.Widget;


namespace Shared
{
    /// <summary>
    /// 在滑动事件下，可显示隐藏些自定义视图
    /// </summary>
    public class UIDrawerLayout : ViewGroup
    {
        AndroidDrawerLayout androidDrawerLayout;

        /// <summary>
        /// 宽度设置或读取
        /// </summary>
        /// <value>The width.</value>
        public override int Width
        {
            get
            {
                return base.Width;
            }
            set
            {
                base.Width = value;
                if (!IsCanRefresh)
                {
                    return;
                }
                var layoutParameters = androidDrawerLayout.LayoutParameters;
                layoutParameters.Width = Width;
                androidDrawerLayout.LayoutParameters = layoutParameters;
            }
        }

        /// <summary>
        /// 视图高度
        /// </summary>
        /// <value>The height.</value>
        public override int Height
        {
            get
            {
                return base.Height;
            }
            set
            {
                base.Height = value;
                if (!IsCanRefresh)
                {
                    return;
                }
                var layoutParameters = androidDrawerLayout.LayoutParameters;
                layoutParameters.Height = Height;
                androidDrawerLayout.LayoutParameters = layoutParameters;
            }
        }

        LinearLayout leftLinarLayout;

        Android.Widget.FrameLayout mainLinarLayout;

        /// <summary>
        /// 在滑动事件下，可显示隐藏些自定义视图
        /// </summary>
        public UIDrawerLayout()
        {
            //viewGroup = new Android.Widget.FrameLayout(Application.Activity);
            androidDrawerLayout = new AndroidDrawerLayout(Application.Activity, this) { };

            viewGroup = androidDrawerLayout;
            //androidDrawerLayout.LeftToRightAction += () =>
            //{
            //    OpenLeftMenu();
            //};

            //androidDrawerLayout.RightToLeftAction += () =>
            //{
            //    CloseLeftMenu();
            //};



            leftLinarLayout = new LinearLayout(Application.Activity) {  Alpha = 1.0f };  
            mainLinarLayout = new Android.Widget.FrameLayout(Application.Activity) { Alpha = 1.0f };

            //viewGroup.AddView(androidDrawerLayout, new Android.Support.V4.Widget.DrawerLayout.LayoutParams(Android.Support.V4.Widget.DrawerLayout.LayoutParams.MatchParent, Android.Support.V4.Widget.DrawerLayout.LayoutParams.MatchParent));
            realViewGroup = mainLinarLayout;

         Android.Support.V4.Widget.DrawerLayout.LayoutParams lp = new Android.Support.V4.Widget.DrawerLayout.LayoutParams(Android.Support.V4.Widget.DrawerLayout.LayoutParams.MatchParent, Android.Support.V4.Widget.DrawerLayout.LayoutParams.MatchParent);
            androidDrawerLayout.AddView(mainLinarLayout, lp);


            Android.Support.V4.Widget.DrawerLayout.LayoutParams lp2 = new Android.Support.V4.Widget.DrawerLayout.LayoutParams(Application.CurrentWidth, Android.Support.V4.Widget.DrawerLayout.LayoutParams.MatchParent);
            lp2.Gravity = GravityCompat.Start;
            androidDrawerLayout.AddView(leftLinarLayout, lp2);

          

            //lp2.Gravity = GravityCompat.End;
            //androidDrawerLayout.AddView(leftLinarLayout, lp2);

        }



        /// <summary>
        /// 打开抽屉view
        /// </summary>
        public void OpenLeftMenu()
        {

            if (!androidDrawerLayout.IsDrawerOpen(GravityCompat.Start))
            {
                androidDrawerLayout.OpenDrawer(GravityCompat.Start);
            }
            System.Console.WriteLine("DrawerLayout:OpenLeftMenu");
        }



        /// <summary>
        /// 关闭抽屉view
        /// </summary>
        public void CloseLeftMenu()
        {
            if (androidDrawerLayout.IsDrawerOpen(GravityCompat.Start))
            {
                androidDrawerLayout.CloseDrawer(GravityCompat.Start);
            }

            System.Console.WriteLine("DrawerLayout:CloseLeftMenu");
        }






        /// <summary>
        /// 增加左边视图
        /// </summary>
        /// <param name="view">View.</param>
        public void AddLeftView(View view)
        {
            leftLinarLayout.AddView(view.AndroidView, new Android.Views.ViewGroup.LayoutParams(leftLinarLayout.LayoutParameters.Width, leftLinarLayout.LayoutParameters.Height));
            view.Parent = this;
            view.Width = leftLinarLayout.LayoutParameters.Width;
            view.Height = leftLinarLayout.LayoutParameters.Height;
        }




        class AndroidDrawerLayout : Android.Support.V4.Widget.DrawerLayout
        {
            View _view;
            int mTouchSlop
            {
                get
                {
                    var configuration = ViewConfiguration.Get(Context);
                    //最小的滑动距离
                    return configuration.ScaledTouchSlop;
                }
            }
            public AndroidDrawerLayout(Context context, View view)
                : base(context)
            {
                _view = view;
      
            }

            //float mLastX, mLastY;
            ////internal bool isShowLeft;
            ////internal bool isShowRight;
            //public Action RightToLeftAction;
            //public Action LeftToRightAction;
            //bool isActioned;
            //bool action(MotionEvent e)
            //{
            //    switch (e.Action)
            //    {
            //        case MotionEventActions.Down:
            //            //记录点击的最新X坐标
            //            mLastX = e.RawX;
            //            mLastY = e.RawY;
            //            Parent?.RequestDisallowInterceptTouchEvent(true);
            //            break;
            //        case MotionEventActions.Move:
            //            var x = e.RawX;
            //            var y = e.RawY;
            //            var deltaX = x - mLastX;
            //            var deltaY = y - mLastY;

            //            if (Math.Abs(deltaY) < Math.Abs(deltaX))
            //            {
            //                if (!isActioned)
            //                {
            //                    //RightToLeftAction
            //                    if (deltaX < -mTouchSlop)
            //                    {

            //                        if (x / this.Width >= 0.5)
            //                        { 

            //                            isActioned = true;
            //                            //parentDelay(true);
            //                            System.Console.WriteLine("DrawerLayout:DispatchTouchEvent:RightToLeft");
            //                            RightToLeftAction?.Invoke();
            //                        }
            //                    }
            //                    //LeftToRightAction
            //                    if (mTouchSlop < deltaX)
            //                    {
            //                        if (x / this.Width <= 0.5)
            //                        {
            //                            isActioned = true;
            //                            //parentDelay(true);
            //                            System.Console.WriteLine("DrawerLayout:DispatchTouchEvent:LeftToRight");
            //                            LeftToRightAction?.Invoke();
            //                        }
            //                    }
            //                }
            //                return true;
            //            }
            //            else
            //            {
            //                //上下滑动时，允许父控件的拦截
            //                if (4 < Math.Abs(deltaY))
            //                {
            //                    Parent?.RequestDisallowInterceptTouchEvent(false);
            //                }
            //            }
            //            break;
            //    }
            //    return false;
            //}

            ///// <summary>
            ///// 执行OnInterceptTouchEvent和OnTouchEvent
            ///// </summary>
            ///// <returns><c>true</c>事件已经处理<c>false</c>事件没有处理</returns>
            ///// <param name="e">E.</param>
            //public override bool DispatchTouchEvent(MotionEvent e)
            //{
            //    //System.Console.WriteLine($"{GetType()} Height->{Height} Width->{Width} DispatchTouchEvent->{e.Action}");
            //    if (e.Action == MotionEventActions.Down)
            //    {
            //        isActioned = false;
            //        //还原允许拦截事件
            //        RequestDisallowInterceptTouchEvent(false);
            //    }
            //    return base.DispatchTouchEvent(e);
            //}

            //public override bool OnInterceptTouchEvent(MotionEvent e)
            //{
            //    //System.Console.WriteLine($"{GetType()} Height->{Height} Width->{Width} OnInterceptTouchEvent->{e.Action}");
            //    if (disallowIntercept)
            //    {
            //        return false;
            //    }
            //    if (action(e))
            //    {
            //        return true;
            //    }
            //    return base.OnInterceptTouchEvent(e);
            //}

            ///// <summary>
            ///// 重写点击事件
            ///// </summary>
            ///// <returns><c>true</c>, if touch event was oned, <c>false</c> otherwise.</returns>
            ///// <param name="e">E.</param>
            //public override bool OnTouchEvent(MotionEvent e)
            //{
            //    //System.Console.WriteLine($"{GetType()} Height->{Height} Width->{Width} OnTouchEvent->{e.Action}");
            //    if (!isActioned)
            //    {
            //        _view.TouchEvent(e);
            //    }
            //    action(e);
            //    return true;
            //}
            //bool disallowIntercept;
            //public override void RequestDisallowInterceptTouchEvent(bool disallowIntercept)
            //{
            //    this.disallowIntercept = disallowIntercept;
            //    //System.Console.WriteLine($"{GetType()} Height->{Height} RequestDisallowInterceptTouchEvent->{disallowIntercept}");
            //    base.RequestDisallowInterceptTouchEvent(disallowIntercept);
            //    Parent?.RequestDisallowInterceptTouchEvent(disallowIntercept);
            //}
        }
    }
}