using Sarand.Net.Mobile.Maui.App;
using Sarand.Net.Standard.Base.Utils;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Sarand.Net.Mobile.Maui.Controls
{
	public class SamEditor : Editor, ISamNativeControlStyle, ISamControl
	{
		// --- Data Members ---

		private bool trimTextOnCompletion = true;
		private int NumberOfLinesPrevious = 0;

		// --- Construction ---

		public SamEditor()
		{
			DefaultFontSize = FontSize;
			Text = "";
			TextChanged += SamEditor_TextChanged;
			Completed += SamEditor_Completed;
		}

		// --- Component state ---

		public void SetControlActivity(bool enabled)
		{
			if (IsEnabled != enabled) IsEnabled = enabled;
		}

		// --- Properties ---


		public double DefaultFontSize { get; }

		public bool TrimText
		{
			get { return trimTextOnCompletion; }
			set
			{
				if (trimTextOnCompletion == value) return;
				trimTextOnCompletion = value;
			}
		}

		// --- Native styling ---
		public bool NativeNoBorder { get; set; } = Sam.Visuals.Form.Controls.NativeNoBorder;
		public bool NativeNoUnderline { get; set; } = Sam.Visuals.Form.Controls.NativeNoUnderline;
		public bool NativeBackgroundClear { get; set; } = Sam.Visuals.Form.Controls.NativeBackgroundClear;

		// --- Control events ---

		// Key Press event is not supported directly in Xamarin.
		// Requires O/S specific implementation.
		// See: Sarand.LogisticsMgr.Mobile.Droid.Forms.Renderers.SlmEditorRenderer
		public void OnKeyPress_Enter()
		{
			// Resize control based on entered text.
			InvalidateMeasure();
		}
		private void SamEditor_TextChanged(object? sender, TextChangedEventArgs e)
		{
			// If the number of lines of text has changed, resize the control.
			int NumberOfLines = StringUtil.EmptyOnNull(Text).Split('\n').Length;
			if (NumberOfLines != NumberOfLinesPrevious)
				// Resize control based on entered text.
				InvalidateMeasure();
			NumberOfLinesPrevious = NumberOfLines;
		}
		private void SamEditor_Completed(object? sender, EventArgs e)
		{
			if (trimTextOnCompletion)
				Text = Text.Trim();
			// Resize control based on entered text.
			InvalidateMeasure();
		}

		// --- The End ---
	}
}