using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using UIKit;
using Foundation;
using Shared.IO;
using CoreGraphics;

namespace Shared
{
    /// <summary>
    /// EditTextView 文本输入框
    /// 支持换行
    /// </summary>
    public class EditTextView : View
    {
        public Action<View, FocusEventArgs> FoucsChanged;
        /// <summary>
        /// 当前视图
        /// </summary>
        /// <value>The ios user interface text view.</value>
        MyEditTextView iosUITextView
        {
            get
            {
                return uiView as MyEditTextView;
            }
            set
            {
                uiView = value;
            }
        }

        //一端口进入配置模式 1提示不要接入设备  2获取设备列表  3接入设备  4追加设备
        /// <summary>
        /// 文字大小
        /// </summary>
        /// <value>The size of the text.</value>
        public float TextSize
        {
            get
            {
                return (float)iosUITextView.Font.PointSize;
            }
            set
            {
                iosUITextView.Font = UIFont.SystemFontOfSize(value);// .SetTextSize (ComplexUnitType.Sp, value);
                iosUITextView.placeholderUILabel.Font = UIFont.SystemFontOfSize(value);// .SetTextSize (ComplexUnitType.Sp, value);
            }
        }

        /// <summary>
        /// 是否设置为加载时显示输入键盘
        /// </summary>
        /// <value><c>true</c> if is first responder; otherwise, <c>false</c>.</value>
        public bool IsFirstResponder
        {
            get
            {
                return iosUITextView.IsFirstResponder;
            }
            set
            {
                if (value)
                {
                    iosUITextView.BecomeFirstResponder();
                }
                else
                {
                    iosUITextView.ResignFirstResponder();
                }
            }
        }

        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>
        /// 是否使能
        /// </summary>
        /// <value>是否使能</value>
        public override bool Enable
        {
            get
            {
                return true;
            }
            set
            {
                //iosUITextView.Enabled = value;
            }
        }


        string _placeholderText = " ";
        /// <summary>
        /// 显示提示信息
        /// </summary>
        /// <value>The placeholder.</value>
        public string PlaceholderText
        {
            get
            {
                return _placeholderText;
            }
            set
            {
                //iosUITextView.Placeholder = value;

                _placeholderText = value;

                iosUITextView.placeholderUILabel.Text = _placeholderText;
            }
        }


        UIColor _placeholderTextUIColor;
        uint placeholderTextColor;
        /// <summary>
        /// Gets or sets the color of the placeholder text.
        /// </summary>
        /// <value>The color of the placeholder text.</value>
        public uint PlaceholderTextColor
        {
            get
            {
                return placeholderTextColor;
            }
            set
            {
                placeholderTextColor = value;
                byte r, g, b, a;
                r = (byte)(placeholderTextColor / 256 / 256 % 256);
                g = (byte)(placeholderTextColor / 256 % 256);
                b = (byte)(placeholderTextColor % 256);
                a = (byte)(placeholderTextColor / 256 / 256 / 256 % 256);

                //iosUITextView.SetValueForKeyPath(UIColor.FromRGBA(r, g, b, a), new NSString("_placeholderLabel.textColor"));

                _placeholderTextUIColor = UIColor.FromRGBA(r, g, b, a);

                iosUITextView.placeholderUILabel.TextColor = _placeholderTextUIColor;
            }
        }

   
        /// <summary>
        /// 是否用*号隐藏字符
        /// </summary>
        /// <value>The secure text entry.</value>
        public bool SecureTextEntry
        {
            get
            {
                return iosUITextView.SecureTextEntry;
            }
            set
            {
                iosUITextView.SecureTextEntry = value;
                if (value)
                {
                    SetTextContentType();
                }
            }
        }


        /// <summary>
        /// 解决iOS12 以上默认提示自动生成强密码
        /// </summary>
        public void SetTextContentType()
        {
            if (UIDevice.CurrentDevice.CheckSystemVersion(11, 0))
            {
                iosUITextView.SetTextContentType(UITextContentType.Password);
            }
        }
        public static EditTextView Instance;
        /// <summary>
        /// 构造函数
        /// </summary>
        public EditTextView()
        {
            iosUITextView = new MyEditTextView(this) { };

            this.TextSize = Application.FontSize;
        }

        /// <summary>
        /// 创新需要创新的信息
        /// </summary>
        public override void Refresh()
        {
            base.Refresh();
            IsSelected = isSelected;
        }


        /// <summary>
        /// 文本
        /// </summary>
        /// <value>The text.</value>
        public string Text
        {
            get
            {
                return iosUITextView.Text;
            }
            set
            {

                iosUITextView.Text = value;
                TextChangeEventHandler?.Invoke(this, value);//赋值，增加触发事件
            }
        }

        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)(textColor / 256 / 256 % 256);
                g = (byte)(textColor / 256 % 256);
                b = (byte)(textColor % 256);
                a = (byte)(textColor / 256 / 256 / 256 % 256);
                iosUITextView.TextColor = UIKit.UIColor.FromRGBA(r, g, b, a);

            }
        }


        bool isSelected;
        /// <summary>
        /// Gets or sets a value indicating whether this instance is selected.
        /// </summary>
        /// <value><c>true</c> if this instance is selected; otherwise, <c>false</c>.</value>
        public bool IsSelected
        {
            get
            {
                return isSelected;
            }
            set
            {
                isSelected = value;

                if (!IsCanRefresh)
                {
                    return;
                }
                if (isSelected)
                {
                    byte r, g, b, a;
                    r = (byte)(SelectedBackgroundColor / 256 / 256 % 256);
                    g = (byte)(SelectedBackgroundColor / 256 % 256);
                    b = (byte)(SelectedBackgroundColor % 256);
                    a = (byte)(SelectedBackgroundColor / 256 / 256 / 256 % 256);
                    iosUITextView.BackgroundColor = UIKit.UIColor.FromRGBA(r, g, b, a);
                }
                else
                {
                    byte r, g, b, a;
                    r = (byte)(BackgroundColor / 256 / 256 % 256);
                    g = (byte)(BackgroundColor / 256 % 256);
                    b = (byte)(BackgroundColor % 256);
                    a = (byte)(BackgroundColor / 256 / 256 / 256 % 256);
                    iosUITextView.BackgroundColor = UIKit.UIColor.FromRGBA(r, g, b, a);
                }
            }
        }

        /// <summary>
        /// 选择时背景颜色
        /// </summary>
        /// <value>The color of the text.</value>
        public uint SelectedBackgroundColor
        {
            get;
            set;
        }


        TextAlignment textAlignment = TextAlignment.Center;

        /// <summary>
        /// Texts the alignment.
        /// </summary>
        public TextAlignment TextAlignment
        {
            get
            {
                return textAlignment;
            }
            set
            {
                textAlignment = value;
                switch (value)
                {
                    case TextAlignment.TopLeft:
                        //iosUITextView.TextAlignment = UITextAlignment.Left;
                        break;
                    case TextAlignment.TopCenter:
                        //iosUITextView.TextAlignment = UITextAlignment.Center| UITextAlignment.Left;
                        break;
                    case TextAlignment.TopRight:
                        //	iosUITextView.TextAlignment = UITextAlignment.Right;
                        break;
                    case TextAlignment.CenterLeft:
                        iosUITextView.TextAlignment = UITextAlignment.Left;
                        break;
                    case TextAlignment.Center:
                        iosUITextView.TextAlignment = UITextAlignment.Center;
                        break;
                    case TextAlignment.CenterRight:
                        iosUITextView.TextAlignment = UITextAlignment.Right;
                        break;
                    case TextAlignment.BottomLeft:
                        //					iosUITextView.TextAlignment = UIKit.UIControlContentVerticalAlignment.Bottom;
                        //					iosUITextView.TextAlignment = UIKit.UIControlContentHorizontalAlignment.Left;
                        break;
                    case TextAlignment.BottomCenter:
                        //					iosUITextView.TextAlignment = UIKit.UIControlContentVerticalAlignment.Bottom;
                        //					iosUITextView.TextAlignment = UIKit.UIControlContentHorizontalAlignment.Center;
                        break;
                    case TextAlignment.BottomRight:
                        //					iosUITextView.VerticalAlignment = UIKit.UIControlContentVerticalAlignment.Bottom;
                        //					iosUITextView.HorizontalAlignment = UIKit.UIControlContentHorizontalAlignment.Right;
                        break;
                }
            }
        }

        /// <summary>
        /// 选择时背景图路径
        /// </summary>
        /// <value>The selected image path.</value>
        public string SelectedImagePath { get; set; }

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


        /// <summary>
        /// 输入文字变化事件
        /// </summary>
        public Action<View, string> TextChangeEventHandler;

        /// <summary>
        /// 按了返回按键事件
        /// </summary>
        public Action<View> EditorEnterAction;
        /// <summary>
        /// 设置焦点
        /// </summary>
        public bool Foucs
        {
            get
            {
                return  iosUITextView.IsFirstResponder;
            }
            set
            {
                if (value)
                {
                    //显示键盘
                    iosUITextView.BecomeFirstResponder();
                }
                else {
                    //隐藏键盘
                    iosUITextView.ResignFirstResponder();
                }
            }
        }

        /// <summary>
        /// 刷新placeholderUILabel布局
        /// </summary>
        public void InitIosPlaceholderUILabelWithHeight(int mHeight)
        {
            var MFrame = iosUITextView.placeholderUILabel.Frame;
            MFrame.X = 5;
            MFrame.Y = 0;
            MFrame.Height = mHeight;
            MFrame.Width = iosUITextView.Frame.Size.Width - 20;
            iosUITextView.placeholderUILabel.Frame = MFrame;
        }

        /// <summary>
        /// 隐藏软键盘
        /// </summary>
        public void HideSoftInput()
        {
            Foucs = false;
        }

        public Action<View, string> KeyEventAction;
        class MyEditTextView : UIKit.UITextView, IUITextViewDelegate
        {
            public UILabel placeholderUILabel;
            [Weak] EditTextView EditTextView;
            public MyEditTextView(EditTextView EditTextView)
            {
                this.EditTextView = EditTextView;
                TextColor = UIColor.White;
                placeholderUILabel = new UILabel(new CGRect(5, 0, this.Frame.Size.Width - 20, 40));
                placeholderUILabel.Lines = 0;
                placeholderUILabel.TextColor = UIColor.Gray;


                this.AddSubview(placeholderUILabel);

                this.Delegate = this;
                EditorEnterAction += () => {
                    this.EditTextView?.EditorEnterAction?.Invoke(this.EditTextView);
                };

                //EditingChanged += (sender, e) =>
                //{
                //    this.EditTextView?.TextChangeEventHandler?.Invoke(this.EditTextView, Text);
                //};
                //EditingDidBegin += (sender, e) =>
                //{
                //    Instance = this.EditTextView;
                //    this.EditTextView?.FoucsChanged?.Invoke(this.EditTextView, new FocusEventArgs { Focus = true });
                //};
                //EditingDidEnd += (sender, e) =>
                //{
                //    this.EditTextView?.FoucsChanged?.Invoke(this.EditTextView, new FocusEventArgs { Focus = false });
                //};
            }

            //public void InitPlaceholderUILabelWithHeight(int mHeight) {
            //    var MFrame = placeholderUILabel.Frame;
            //    MFrame.Height = mHeight;
            //    MFrame.Width = this.Frame.Size.Width - 20;
            //    placeholderUILabel.Frame = MFrame;
            //}

            public override void MovedToSuperview()
            {
                base.MovedToSuperview();
                if (Superview == null)
                {
                    Shared.HDLUtils.WriteLine("从父控件中移除");
                }
                else {
                    Shared.HDLUtils.WriteLine("添加到父控件");
                }
            }

            public override void DeleteBackward()
            {
                base.DeleteBackward();
                EditTextView?.KeyEventAction?.Invoke(EditTextView, "Del");
            }

            internal System.Action EditorEnterAction;


            [Export("textViewDidChange:")]
            public new void Changed(UITextView textView)
            {
                this.EditTextView?.TextChangeEventHandler?.Invoke(this.EditTextView, Text);

                //取消按钮点击权限，并显示文字
                if (textView.Text.Length == 0)
                {
                    placeholderUILabel.Hidden = false;
                }
                else
                {
                    placeholderUILabel.Hidden = true;
                }
            }

            [Export("textViewDidBeginEditing:")]
            public void EditingStarted(UITextView textView)
            {
                Instance = this.EditTextView;
                this.EditTextView?.FoucsChanged?.Invoke(this.EditTextView, new FocusEventArgs { Focus = true });
            }
            [Export("textViewDidEndEditing:")]
            public void EditingEnded(UITextView textView)
            {
                this.EditTextView?.FoucsChanged?.Invoke(this.EditTextView, new FocusEventArgs { Focus = false });
            }

            


            nfloat x;
       
            /// <summary>
            /// 点击开始
            /// </summary>
            /// <param name="touches">Touches.</param>
            /// <param name="evt">Evt.</param>
            public override void TouchesBegan(NSSet touches, UIEvent evt)
            {
                EditTextView?.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)
            {
                EditTextView?.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)
            {
                EditTextView?.TouchEvent(EventActions.Up, (touches.AnyObject as UITouch).LocationInView(this));
            }

            public override void TouchesCancelled(NSSet touches, UIEvent evt)
            {
                EditTextView?.TouchEvent(EventActions.Cancel, (touches.AnyObject as UITouch).LocationInView(this));
            }
        }
    }
    //public class FocusEventArgs : EventArgs
    //{
    //    /// <summary>
    //    /// true 为获取到焦点
    //    /// false 焦点消失
    //    /// </summary>
    //    public bool Focus;
    //}


//    -(void) textViewDidChange:(UITextView*) textView
//    {
//        self.descLab.hidden = YES;
//        self.sendBtn.userInteractionEnabled = YES;
//        self.sendBtn.backgroundColor = MainColor;
//        //实时显示字数
//        self.stringlenghtLab.text = [NSString stringWithFormat:@"%ld/100",(long)textView.text.length];
    
//    //字数限制
//    if (textView.text.length >= 100) {
//            textView.text = [textView.text substringToIndex: 100];
//        }
    
//    //取消按钮点击权限，并显示文字
//    if (textView.text.length == 0) {
//            self.descLab.hidden = NO;
//            self.sendBtn.userInteractionEnabled = NO;
//            self.sendBtn.backgroundColor = [UIColor lightGrayColor];
//        }
//    }

//-(BOOL) textView:(UITextView*) textView shouldChangeTextInRange:(NSRange) range replacementText:(NSString*) text
//    {
//    if ([text isEqualToString:@"\n"]) {


//        [self.FKTextView resignFirstResponder];
        
//        return NO;
//    }
    
//    return YES;
//}
}