using System;
using UIKit;
using CoreGraphics;
using Shared.IO;
using Foundation;

namespace Shared
{
	/// <summary>
	/// 在滑动事件下，可显示隐藏些自定义视图
	/// </summary>
	public class RowLayout : ViewGroup
	{
		/// <summary>
		/// 右边的视图列表
		/// </summary>
		internal System.Collections.Generic.List<Button> leftView = new System.Collections.Generic.List<Button>();
		/// <summary>
		/// 右边的视图列表
		/// </summary>
		internal System.Collections.Generic.List<Button> rigthView = new System.Collections.Generic.List<Button>();

		/// <summary>
		/// 重新刷新控件
		/// </summary>
		public override void Refresh()
		{
			base.Refresh();
		}
		/// <summary>
		/// 控件宽度
		/// </summary>
		public override int Width
		{
			get
			{
				return base.Width;
			}
            set
            {
                base.Width = value;
                if (!IsCanRefresh)
                    return;
            }
		}

		/// <summary>
		/// 子视图的宽度
		/// </summary>
		public int SubViewWidth = 70;

		/// <summary>
		/// 控件的高度
		/// </summary>
		/// <value>The height.</value>
		public override int Height
		{
			get
			{
				return base.Height;
			}
			set
			{
				base.Height = value;
				if (!IsCanRefresh)
					return;

				{
					var frame = realViewGroup.Frame;
					frame.Height = Height;
					realViewGroup.Frame = frame;
				}
			}
		}

		/// <summary>
		/// 增加左边视图
		/// </summary>
		/// <param name="view">View.</param>
		public void AddLeftView(Button view)
		{
			if (null == view)
			{
				return;
			}
			view.X = leftView.Count * SubViewWidth;
			view.Y = 0;
			view.Width = SubViewWidth;
			view.Height = Height;
			viewGroup.AddSubview(view.RealView);
			view.Parent = this;
			view.Refresh();
			leftView.Add(view);
			var frame = realViewGroup.Frame;
			frame.X += SubViewWidth;
			realViewGroup.Frame = frame;
			foreach (var right in rigthView)
			{
				right.X += SubViewWidth;
			}
			(viewGroup as UIScrollView).ContentSize = new CoreGraphics.CGSize((leftView.Count + rigthView.Count) * SubViewWidth + realViewGroup.Frame.Width, 0);
			(viewGroup as UIScrollView).SetContentOffset(new CGPoint(realViewGroup.Frame.X, 0), false);
		}

        internal override void removeChildParent()
        {
            foreach (var tempView in leftView)
            {
                tempView.Parent = null;
            }
            foreach (var tempView in rigthView)
            {
                tempView.Parent = null;
            }
            base.removeChildParent();
        }

        /// <summary>
        /// 增加右边视图
        /// </summary>
        /// <param name="view">View.</param>
        public void AddRightView(Button view)
		{
           if (null == view)
			{
				return;
			}
			view.X =(int)realViewGroup.Frame.Right+ rigthView.Count * SubViewWidth;
			view.Y = 0;
			view.Width = SubViewWidth;
			view.Height = Height;
			viewGroup.AddSubview(view.RealView);
			view.Parent = this;
			view.Refresh();
			rigthView.Add(view);

			(viewGroup as UIScrollView).ContentSize = new CoreGraphics.CGSize((leftView.Count + rigthView.Count) * SubViewWidth + realViewGroup.Frame.Width, 0);
			(viewGroup as UIScrollView).SetContentOffset(new CGPoint(realViewGroup.Frame.X, 0), false);

		}

        /// <summary>
        /// 在滑动事件下，可显示隐藏些自定义视图
        /// </summary>
        public RowLayout()
		{
            viewGroup = new UIScrollView { Bounces = false };
            realViewGroup = new MyRowLayout(this) { };
            
			viewGroup.AddSubview(realViewGroup);
			viewGroup.Layer.MasksToBounds = true;

            (viewGroup as UIScrollView).ShowsHorizontalScrollIndicator = false;//隐藏水平滚动条
        }



        /// <summary>
        /// 垂直方向滚动视图
        /// </summary>
        class MyRowLayout : UIView
        {
            [Weak] internal RowLayout rowLayout;
            public MyRowLayout(RowLayout rowLayout)
            {
                this.rowLayout = rowLayout;
            }
            /// <summary>
            /// 点击开始
            /// </summary>
            /// <param name="touches">Touches.</param>
            /// <param name="evt">Evt.</param>
            public override void TouchesBegan(NSSet touches, UIEvent evt)
            {
                rowLayout?.TouchEvent(EventActions.Down, (touches.AnyObject as UITouch).LocationInView(this));
            }
            /// <summary>
            ///  移动
            /// </summary>
            /// <param name="touches">Touches.</param>
            /// <param name="evt">Evt.</param>
            public override void TouchesMoved(NSSet touches, UIEvent evt)
            {
                rowLayout?.TouchEvent(EventActions.Move, (touches.AnyObject as UITouch).LocationInView(this));
            }

            /// <summary>
            /// 点击弹起
            /// </summary>
            /// <param name="touches">Touches.</param>
            /// <param name="evt">Evt.</param>
            public override void TouchesEnded(NSSet touches, UIEvent evt)
            {
                rowLayout?.TouchEvent(EventActions.Up, (touches.AnyObject as UITouch).LocationInView(this));
            }

            public override void TouchesCancelled(NSSet touches, UIEvent evt)
            {
                rowLayout?.TouchEvent(EventActions.Cancel, (touches.AnyObject as UITouch).LocationInView(this));
            }
            /// <summary>
            /// 框架默认加了两个UIImageView ，这样可以去掉默认添加
            /// </summary>
            /// <param name="view">View.</param>
            public override void AddSubview(UIView view)
            {
                if (view.GetType() == typeof(UIImageView) && view.Tag != int.MinValue)
                {
                    return;
                }
                base.AddSubview(view);
            }
        }
    }
}