using Android.Content;
using Android.OS;
using Android.Text;
using Android.Views;
using Android.Widget;
using Microsoft.Maui.Controls.Compatibility;
using Microsoft.Maui.Controls.Platform;
using Microsoft.Maui.Handlers;
using System;
using System.ComponentModel;
using System.Text.RegularExpressions;
using Xamarin.Forms;
using Xamarin.Forms.Clinical6.UI.Controls;

namespace Xamarin.Forms.Clinical6.Android.Renderers
{
    public class HtmlLabelHandler : LabelHandler
    {
        public HtmlLabelHandler() : base(Mapper)
        {
        }

        public static new IPropertyMapper<ILabel, LabelHandler> Mapper = new PropertyMapper<ILabel, LabelHandler>(LabelHandler.Mapper)
        {
            [nameof(Label.Text)] = MapHtmlText,
            [nameof(HtmlLabel.HtmlText)] = MapHtmlText
        };

        public static void MapHtmlText(LabelHandler handler, ILabel label)
        {
            if (handler.PlatformView is TextView textView && label is HtmlLabel htmlLabel)
            {
                var text = string.IsNullOrEmpty(htmlLabel.HtmlText) ? label.Text : htmlLabel.HtmlText;

                if (string.IsNullOrEmpty(text))
                {
                    textView.Text = string.Empty;
                    return;
                }

                if ((int)Build.VERSION.SdkInt >= 24)
                {
                    text = htmlLabel.GetStyledHtml();

                    if (!string.IsNullOrEmpty(htmlLabel.HtmlText))
                    {
                        text = htmlLabel.HtmlText;
                    }

                    // Convert rgb() colors to hex format
                    text = Regex.Replace(text,
                        @"rgb\([ ]*(\d+)[ ]*,[ ]*(\d+)[ ]*,[ ]*(\d+)[ ]*\)",
                        m =>
                        {
                            return "#" + int.Parse(m.Groups[1].Value).ToString("X2") +
                                   int.Parse(m.Groups[2].Value).ToString("X2") +
                                   int.Parse(m.Groups[3].Value).ToString("X2");
                        });

                    textView.TextFormatted = Html.FromHtml(text, FromHtmlOptions.ModeLegacy);
                }
                else
                {
                    textView.SetText(Html.FromHtml(text, FromHtmlOptions.ModeLegacy), TextView.BufferType.Spannable);
                }
            }
        }

    }
}
        /// <summary>
        /// Html label renderer.
        /// </summary>
        //public class HtmlLabelRenderer : LabelRenderer
        //{
        //    public HtmlLabelRenderer(Context context) : base(context) { }

        //    /// <summary>
        //    /// Ons the element changed.
        //    /// </summary>
        //    /// <param name="e">E.</param>
        //    protected override void OnElementChanged(ElementChangedEventArgs<Label> e)
        //    {
        //        base.OnElementChanged(e);

        //        SetText();
        //    }

        //    /// <summary>
        //    /// Ons the element property changed.
        //    /// </summary>
        //    /// <param name="sender">Sender.</param>
        //    /// <param name="e">E.</param>
        //    protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
        //    {
        //        base.OnElementPropertyChanged(sender, e);

        //        if(e.PropertyName == Label.TextProperty.PropertyName || e.PropertyName == HtmlLabel.HtmlTextProperty.PropertyName)
        //        {

        //            SetText();
        //        }
        //    }

        //    private void SetText()
        //    {
        //        try
        //        {
        //            var text = Element.Text;

        //            if (!string.IsNullOrEmpty(((HtmlLabel)Element).HtmlText))
        //            {
        //                text = ((HtmlLabel)Element).HtmlText;
        //            }

        //            if (string.IsNullOrEmpty(text))
        //            {
        //                return;
        //            }

        //            if (((int)Build.VERSION.SdkInt) >= 24)
        //            {
        //                text = ((HtmlLabel)Element).GetStyledHtml();

        //                if (!string.IsNullOrEmpty(((HtmlLabel)Element).HtmlText))
        //                {
        //                    text = ((HtmlLabel)Element).HtmlText;
        //                }

        //                //The rgb(#,#,#) format is not supported on Android.
        //                //For more information refer https://stackoverflow.com/questions/60097599/html-content-with-rgb-color-not-displaying-in-android-but-in-iosapple-work-per.
        //                text = Regex.Replace(text,
        //                    @"rgb\([ ]*(\d+)[ ]*,[ ]*(\d+)[ ]*,[ ]*(\d+)[ ]*\)",
        //                    m =>
        //                    {
        //                        return "#" + int.Parse(m.Groups[1].Value).ToString("X2") +
        //                        int.Parse(m.Groups[2].Value).ToString("X2") +
        //                        int.Parse(m.Groups[3].Value).ToString("X2");
        //                    }
        //                );

        //                Control.TextFormatted = Html.FromHtml(text, FromHtmlOptions.ModeLegacy);

        //                // Apparently this does not actually left align...?
        //                //Control.Gravity = GravityFlags.Left;
        //            }
        //            else
        //            {
        //                Control?.SetText(Html.FromHtml(text, FromHtmlOptions.ModeLegacy), TextView.BufferType.Spannable);
        //            }
        //        }
        //        catch
        //        {

        //        }
        //    }
        //}