using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.Util;
using Android.Graphics;
using Android.Graphics.Drawables;

namespace Shared
{
	/// <summary>
	/// Button 按键
	/// </summary>
	public class Button : View
	{
		/// <summary>
		///  当前视图
		/// </summary>
		/// <value>The android button.</value>
		AndroidButton currentButton
		{
			get
			{
				
				return androidView as AndroidButton;
			}
			set
			{
				this.androidView = value;
			}
		}
			
		public Button()
		{
			 currentButton = new AndroidButton (Application.Activity);
			 currentButton.SetTextColor (Android.Graphics.Color.White);
			 currentButton.MouseDownEventHandler += (sender, e) => {
				OnMouseDown();
			};
			 currentButton.MouseUPEventHandler += (sender, e) => {
				OnMouseUp();
			};
			 currentButton.SizeChangeEventHandler+= (sender, e) => {
				OnSizeChange(e);
			};
		}

		/// <summary>
		/// 文字大小
		/// </summary>
		/// <value>The size of the text.</value>
		public float TextSize
		{
			get
			{
				return currentButton.TextSize;
			}
			set
			{
				currentButton.SetTextSize(ComplexUnitType.Sp, value);
			}
		}

		int textID;
		/// <summary>
		/// 根据ID获取对应的备注
		/// </summary>
		/// <value>The text I.</value>
		public int TextID
		{
			get
			{
				return textID;
			}
			set
			{
				textID = value;
				Text = Language.StringByID (TextID);
			}
		}
			
		/// <summary>
		/// 文本
		/// </summary>
		/// <value>The text.</value>
		public string Text
		{
			get
			{
				return  currentButton.Text;
			}
			set
			{

				 currentButton.Text = value;
			}
		}

		/// <summary>
		/// 刷新
		/// </summary>
		public override void Refresh()
		{
			base.Refresh ();
			IsSelected = isSelected;
		}

		private uint textColor;
		/// <summary>
		/// 文字颜色
		/// </summary>
		/// <value>The color of the text.</value>
		public uint TextColor
		{
			get
			{
				return textColor;
			}
			set
			{
				textColor = value;
				byte r, g, b, a;
				r = (byte)(this.textColor / 256 / 256 % 256);
				g = (byte)(this.textColor / 256 % 256);
				b = (byte)(this.textColor % 256);
				a = (byte)(this.textColor / 256 / 256 / 256 % 256);

				currentButton.SetTextColor(Android.Graphics.Color.Argb(a, r, g, b));
			}
		}

		private bool isSelected;
		private string beforeImagePath;
		/// <summary>
		/// 选中状态
		/// </summary>
		/// <value><c>true</c> if this instance is selected; otherwise, <c>false</c>.</value>
		public bool IsSelected
		{
			get
			{
				return this.isSelected;
			}
			set
			{
				this.isSelected = value;
				if (this.RealView.Parent == null || Radius != 0)
				{
					return;
				}
				if (this.isSelected)
				{
					if (beforeImagePath == this.SelectedImagePath)
					{
						return;
					}

					if (this.Background(this.SelectedImagePath))
					{
						beforeImagePath = this.SelectedImagePath;
					}
				}
				else
				{
					if (beforeImagePath == this.UnSelectedImagePath)
					{
						return;
					}

					if (this.Background(this.UnSelectedImagePath))
					{
						beforeImagePath = this.UnSelectedImagePath;
					}
				}
			}
		}
			
		private TextAlignment textAlignment= TextAlignment.Center;
		/// <summary>
		/// 文字对齐方式
		/// </summary>
		/// <param name="horizontalAlignment">Horizontal alignment.</param>
		/// <param name="verticalAlignment">Vertical alignment.</param>
		public TextAlignment TextAlignment {
			get {
				return this.textAlignment;
			}
			set {
				this.textAlignment = value;
				switch (value) {
				case TextAlignment.TopLeft:
					this. currentButton.Gravity = GravityFlags.Top | GravityFlags.Left;
					break;
				case TextAlignment.TopCenter:
					this. currentButton.Gravity = GravityFlags.Top | GravityFlags.Center;
					break;
				case TextAlignment.TopRight: 
					this. currentButton.Gravity = GravityFlags.Top | GravityFlags.Right;
					break; 
				case TextAlignment.CenterLeft:
					this. currentButton.Gravity = GravityFlags.Center | GravityFlags.Left;
					break;
				case TextAlignment.Center:
					this. currentButton.Gravity = GravityFlags.Center | GravityFlags.Center;
					break;
				case TextAlignment.CenterRight:
					this. currentButton.Gravity = GravityFlags.Center | GravityFlags.Right;
					break;
				case TextAlignment.BottomLeft:
					this. currentButton.Gravity = GravityFlags.Bottom | GravityFlags.Left;
					break;
				case TextAlignment.BottomCenter:
					this. currentButton.Gravity = GravityFlags.Bottom | GravityFlags.Center;
					break;
				case TextAlignment.BottomRight:
					this. currentButton.Gravity = GravityFlags.Bottom | GravityFlags.Right;
					break;
				}
			}
		}

		/// <summary>
		/// 内边距
		/// </summary>
		/// <value>The padding.</value>
		public override Padding Padding {
			get {
				return new Padding (this. currentButton.PaddingTop, this. currentButton.PaddingLeft,this. currentButton.PaddingBottom, this. currentButton.PaddingRight);
			}
			set {
				//base.Padding = value;
				this. currentButton.SetPadding (DensityUtil.Dip2Px( value.Left),DensityUtil.Dip2Px( value.Top),DensityUtil.Dip2Px( value.Right),DensityUtil.Dip2Px( value.Bottom));
			}
		}
			
		private string selectedImagePath;
		/// <summary>
		/// 选择时背景图路径
		/// </summary>
		/// <value>The selected image path.</value>
		public string SelectedImagePath 
		{
			get
			{
				return this.selectedImagePath;
			}
			set{ 
				this.selectedImagePath = value;
				IsSelected = IsSelected;
			}
		}

		private string unSelectedImagePath;
		/// <summary>
		/// 非选中状态的背景图路径
		/// </summary>
		/// <value>The un selected image path.</value>
		public string UnSelectedImagePath 
		{
			get
			{
				return this.unSelectedImagePath;
			}
			set
			{
				this.unSelectedImagePath = value;
				IsSelected = IsSelected;
			}
		}

	}
	public class AndroidButton : Android.Widget.Button
	{
		
		public AndroidButton(Context context)
			: base(context)
		{
			this.SetBackgroundColor (Android.Graphics.Color.Transparent);
			this.SetPadding (0, 0, 0, 0);
		}

		public AndroidButton(Context context, IAttributeSet attrs)
			: base(context, attrs) { }

		protected AndroidButton(IntPtr javaReference, JniHandleOwnership transfer)
			: base(javaReference, transfer) { }

		public AndroidButton(Context context, IAttributeSet attrs, int defStyle)
			: base(context, attrs, defStyle) { }

		/// <summary>
		/// 点击弹起事件
		/// </summary>
		public  EventHandler MouseUPEventHandler;
		/// <summary>
		/// 点击按下事件
		/// </summary>
		public  EventHandler MouseDownEventHandler;

		/// <summary>
		/// 点击事件
		/// </summary>
		/// <returns>The touch event.</returns>
		/// <param name="e">E.</param>
		public override bool OnTouchEvent(Android.Views.MotionEvent e)
		{
			if (e.Action == Android.Views.MotionEventActions.Down && MouseDownEventHandler != null)
			{
				MouseDownEventHandler(this, EventArgs.Empty);
			}
			else if (e.Action == Android.Views.MotionEventActions.Up && MouseUPEventHandler != null)
			{
				MouseUPEventHandler(this, EventArgs.Empty);
			}
			return base.OnTouchEvent(e);
		}

		/// <summary>
		/// 大小变化事件
		/// </summary>
		public  EventHandler<Size> SizeChangeEventHandler;

		public override ViewGroup.LayoutParams LayoutParameters
		{
			get
			{
				return base.LayoutParameters;
			}
			set
			{
				var layoutParams = base.LayoutParameters;
				base.LayoutParameters = value;

				if (layoutParams == null || layoutParams.Width != value.Width || layoutParams.Height != value.Height)
				{
					if (this.SizeChangeEventHandler != null)
					{
						this.SizeChangeEventHandler(this, new Size((int)this.LayoutParameters.Width, (int)this.LayoutParameters.Height));
					}
				}
			}
		}

	}
}