using System;
using UIKit;
using CoreGraphics;

namespace Shared
{
    /// <summary>
    /// Loading UI
    /// </summary>
    public class Loading : View
    {

        public bool CurStatus = false;
        internal IosLoading iosLoading
        {
            get
            {
                return uiView as IosLoading;
            }
            set
            {
                uiView = value;
            }
        }

        /// <summary>
        /// Loading UI
        /// </summary>
        public Loading()
        {
            var bounds = UIScreen.MainScreen.Bounds;
            iosLoading = new IosLoading(bounds);
        }


        /// <summary>
        /// 开始当前视图
        /// </summary>
        public void Start()
        {
            Text = "Loading......";
            iosLoading.Start();
            CurStatus = true;
        }

        /// <summary>
        /// 开始当前视图
        /// </summary>
        public void Start(string s)
        {
            Text = s;
            iosLoading.Start();
        }


        /// <summary>
        /// 隐藏当前视图
        /// </summary>
        public void Hide()
        {
            Text = "Loading......";
            iosLoading.Hide();
            CurStatus = false;
        }

        public string Text
        {
            get
            {
                return iosLoading.uiLabel.Text;
            }
            set
            {
                iosLoading.uiLabel.Text = value;
                iosLoading.RefreshWidth();

            }
        }

        uint mTextColor;
        public uint TextColor
        {
            get
            {
                return mTextColor;
            }
            set
            {
                mTextColor = value;
                iosLoading.uiLabel.TextColor = HDLUtils.GetUIColorWithUint(mTextColor);
            }
        }



        public virtual uint LodingBackgroundColor
        {
            get
            {
                return (iosLoading as IosLoading).LodingBackgroundColor;
            }
            set
            {
                (iosLoading as IosLoading).LodingBackgroundColor = value;
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="mViewStyle">1 为灰色</param>
        public void SetUIActivityIndicatorViewStyle(int mViewStyle)
        {
            (iosLoading as IosLoading).SetUIActivityIndicatorViewStyle(mViewStyle);

        }

        /// <summary>
        /// 文字大小
        /// </summary>
        /// <value>The size of the text.</value>
        public float TextSize
        {
            get
            {
                return (float)iosLoading.uiLabel.Font.PointSize;
            }
            set
            {
                iosLoading.uiLabel.Font = UIFont.FromName(iosLoading.uiLabel.Font.Name, value);
            }
        }


    }

    internal class IosLoading : UIView
    {

        UIActivityIndicatorView activitySpinner = new UIActivityIndicatorView(UIActivityIndicatorViewStyle.WhiteLarge);
        public UILabel uiLabel = new UILabel();
        UIView backUIView = new UIView(new CGRect(0, 0, 160, 120));

        public IosLoading(CGRect frame)
        {
            BackgroundColor = UIKit.UIColor.FromRGBA(0x32, 0x32, 0x32, 50);

            Frame = frame;
            Hidden = true;

            AutoresizingMask = UIViewAutoresizing.All;

            var f = backUIView.Frame;
            f.Width = frame.Width;
            //f.Height = frame.Height;
            backUIView.Frame = f;
            var center = backUIView.Center;
            center.X = Frame.Width / 2;
            center.Y = Frame.Height / 2;
            backUIView.Center = center;
            AddSubview(backUIView);
            // create the activity spinner, center it horizontall and put it 5 points above center x
            var center1 = activitySpinner.Center;
            center1.X = backUIView.Frame.Width / 2;
            center1.Y = (backUIView.Frame.Height - 62) / 2 + 20;
            activitySpinner.Center = center1;
            backUIView.AddSubview(activitySpinner);
            activitySpinner.BackgroundColor = UIColor.Clear;
            activitySpinner.Color = UIColor.Gray;

            var frame2 = uiLabel.Frame;
            frame2.Y = backUIView.Frame.Height - 42;
            frame2.Width = backUIView.Frame.Width;
            frame2.Height = 22;
            uiLabel.Frame = frame2;

            uiLabel.BackgroundColor = UIColor.Clear;
            uiLabel.TextColor = UIColor.Gray;
            uiLabel.TextAlignment = UITextAlignment.Center;
            //uiLabel.F
            backUIView.AddSubview(uiLabel);

        }

        public void Start()
        {
            if (Superview == null)
            {
                return;
            }
           
            Hidden = false;
            activitySpinner.StartAnimating();
            Superview.BringSubviewToFront(this);
        }

        /// <summary>
        /// Fades out the control and then removes it from the super view
        /// </summary>
        public void Hide()
        {
            if (Superview == null)
            {
                return;
            }
            Hidden = true;
            activitySpinner.StopAnimating();
            Superview.SendSubviewToBack(this);
        }

        uint loadingBackgroundColor;
        /// <summary>
        /// 背景颜色
        /// </summary>
        /// <value>The color of the background.</value>
        public virtual uint LodingBackgroundColor
        {
            get
            {
                return loadingBackgroundColor;
            }
            set
            {
                loadingBackgroundColor = value;

                if (this.GetType() != typeof(ImageView))
                {
                    byte r, g, b, a;
                    r = (byte)(loadingBackgroundColor / 256 / 256 % 256);
                    g = (byte)(loadingBackgroundColor / 256 % 256);
                    b = (byte)(loadingBackgroundColor % 256);
                    a = (byte)(loadingBackgroundColor / 256 / 256 / 256 % 256);
                    backUIView.BackgroundColor = UIKit.UIColor.FromRGBA(r, g, b, a);


                    backUIView.Layer.MasksToBounds = true;
                    backUIView.Layer.CornerRadius = 6;
                    backUIView.Layer.BorderWidth = 0;
                }
            }
        }

        public void SetUIActivityIndicatorViewStyle(int mViewStyle)
        {
            if (mViewStyle == 1)
            {
                activitySpinner.ActivityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray;
            }
            else
            {
                activitySpinner.ActivityIndicatorViewStyle = UIActivityIndicatorViewStyle.WhiteLarge;
            }

        }

        public void RefreshWidth()
        {
            int maxTextWidth = GetTextWidth() + 40;
            if (maxTextWidth > this.Frame.Width - 20)
            {
                maxTextWidth = (int)this.Frame.Width - 20;
            }
            else if (maxTextWidth < 120)
            {
                maxTextWidth = 120;
            }

            var mFrame = backUIView.Frame;
            if ((int)mFrame.Width == maxTextWidth)
            {
                return;
            }

            mFrame.Width = maxTextWidth;
            //f.Height = frame.Height;
            backUIView.Frame = mFrame;
            var center = backUIView.Center;
            center.X = Frame.Width / 2;
            center.Y = Frame.Height / 2;

            backUIView.Center = center;

            var center1 = activitySpinner.Center;
            center1.X = backUIView.Frame.Width / 2;
            activitySpinner.Center = center1;

            var frame2 = uiLabel.Frame;
            frame2.Width = backUIView.Frame.Width;
            uiLabel.Frame = frame2;
        }

        /// <summary>
        /// 获取字体长度
        /// </summary>
        int GetTextWidth()
        {
            try
            {
                CGSize fontSize = uiLabel.Text.StringSize(uiLabel.Font);
                return (int)fontSize.Width;
            }
            catch
            {
                return 0;
            }
        }

    }
}