using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Android.App;
using Android.Content;
using Android.Graphics;
using Android.Graphics.Drawables;
using Android.OS;
using Android.Runtime;
using Android.Text;
using Android.Text.Method;
using Android.Views;
using Android.Widget;
using TcuMobile.Controls;
using TcuMobile.Droid.Renderers.Material;
using Xamarin.Forms;
using Xamarin.Forms.Material.Android;
using Xamarin.Forms.Platform.Android;

[assembly: ExportRenderer(typeof(MaterialEntry), typeof(ExtendedMaterialEntryRenderer), new[] { typeof(VisualMarker.MaterialVisual) })]
namespace TcuMobile.Droid.Renderers.Material
{
    public class ExtendedMaterialEntryRenderer : MaterialEntryRenderer
    {
        public OnTrailingDrawableTouchListener TrailingDrawableTouchListener { get; private set; }

        public new MaterialEntry Element => (MaterialEntry)base.Element;

        public ExtendedMaterialEntryRenderer(Context context) : base(context)
        {
        }

        protected override async void OnElementChanged(ElementChangedEventArgs<Entry> e)
        {
            base.OnElementChanged(e);
            if (e.OldElement != null || e.NewElement == null)
                return;
            Control.SetCounter(Element);
            Control.SetHelperText(Element);
            Control.SetBackground(Element);
            await Control.SetDrawable(Element);
            Control.SetError(Element);
            this.Control.EditText.SetSelectAllOnFocus(this.Element.SelectAllOnFocus);
            this.SetIsDecimal();
            this.SetIsFocusable();
            this.SetIsNumeric();
            
        }

        protected override async void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            base.OnElementPropertyChanged(sender, e);
            if (e.PropertyName == nameof(MaterialEntry.LeadingImageSource) || e.PropertyName == nameof(MaterialEntry.TrailingImageSource))
                await Control.SetDrawable(Element);
            if (e.PropertyName == nameof(Element.IsErrorEnabled) || e.PropertyName == nameof(Element.ErrorText))
                Control.SetError(Element);
            if (e.PropertyName == nameof(Element.IsHelperTextEnabled) || e.PropertyName == nameof(Element.HelperText))
                Control.SetHelperText(Element);
            if (e.PropertyName == nameof(Element.IsCounterEnabled) || e.PropertyName == nameof(Element.CounterMaxLength))
                Control.SetCounter(Element);
            if (e.PropertyName == nameof(Element.CornerRadius) || e.PropertyName == nameof(Element.BackgroundColor) || e.PropertyName == nameof(Element.BorderWidth) || e.PropertyName == nameof(Element.BorderColor))
                Control.SetBackground(Element);
            if (e.PropertyName == nameof(Element.SelectAllOnFocus))
                this.Control.EditText.SetSelectAllOnFocus(this.Element.SelectAllOnFocus);
            if (e.PropertyName == nameof(Element.Focusable))
                this.SetIsFocusable();
            if (e.PropertyName == nameof(Element.IsDecimal))
                this.SetIsDecimal();
            if (e.PropertyName == nameof(Element.IsNumeric))
                this.SetIsNumeric();
        }

        private void SetIsDecimal()
        {
            if (this.Control == null) return;
            if (this.Element.IsDecimal)
            {
                if (Build.VERSION.SdkInt >= BuildVersionCodes.O)
                    this.Control.EditText.KeyListener = DigitsKeyListener.GetInstance(null, true, true);
                else
                    this.Control.EditText.KeyListener = DigitsKeyListener.GetInstance(true, true);
                this.Control.EditText.InputType = InputTypes.ClassNumber | InputTypes.NumberFlagDecimal;
            }
        }

        private void SetIsNumeric()
        {
            if (this.Control == null) return;
            if (this.Element.IsNumeric)
            {
                InputTypes its = InputTypes.ClassNumber | InputTypes.NumberVariationNormal;
                Control.EditText.SetRawInputType(its);
            }
        }

        private void SetIsFocusable()
        {
            if (this.Control == null) return;
            this.Control.EditText.Focusable = this.Element.Focusable;
            if (this.Element.Focusable)
            {
                this.Control.Click -= this.OnClick;
                this.Control.EditText.Click -= OnClick;
            }
            else
            {
                //todo: вернуть тип ввода назад после того, как присвоим IsFocusable=true
                this.Control.EditText.InputType = InputTypes.Null;
                this.Control.Click += this.OnClick;
                this.Control.EditText.Click += OnClick;
            }
        }

        private void OnClick(object sender, EventArgs e)
        {
            this.Element.InvokeTapped();
        }
    }

    public class OnTrailingDrawableTouchListener : Java.Lang.Object, Android.Views.View.IOnTouchListener
    {
        public event EventHandler RightDrawableClicked;

        public Action OnTapped { get; }

        public OnTrailingDrawableTouchListener()
        {
        }

        public OnTrailingDrawableTouchListener(Action onTapped)
        {
            OnTapped = onTapped;
        }

        public bool OnTouch(Android.Views.View view, MotionEvent e)
        {
            if (view is EditText && e.Action == MotionEventActions.Up)
            {
                EditText editText = (EditText)view;
                if (editText.GetCompoundDrawables()[2] != null)
                {
                    if (e.RawX >= (editText.Right - editText.GetCompoundDrawables()[2].Bounds.Width()))
                    {
                        this.RightDrawableClicked?.Invoke(this, new EventArgs());
                        OnTapped();
                        return true;
                    }
                }
            }
            return false;
        }
    }
}