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

namespace Sarand.Net.Mobile.Maui.Controls
{
	public class SamEntry : Entry, ISamNativeControlStyle, ISamControl
	{
		// --- Definitions ---

		public enum TextCaseType
		{
			Normal,
			Upper,
			Lower,
			Title
		}

		// --- Data Members ---

		private bool trimTextOnCompletion = true;
		private TextInfo textInfo = CultureInfo.CurrentCulture.TextInfo;
		private TextCaseType textCase = TextCaseType.Normal;
		private bool numericOnly = false;
		private byte decimals = 0;

		// --- Construction ---

		public SamEntry()
		{
			DefaultFontSize = FontSize;
			TextChanged += SamEntry_TextChanged;
			Completed += SamEntry_Completed;
		}

		// --- Component state ---

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

		// --- Properties ---

		public bool TrimText
		{
			get { return trimTextOnCompletion; }
			set
			{
				if (trimTextOnCompletion == value) return;
				trimTextOnCompletion = value;
			}
		}
		/// <summary>
		/// Whether to format text as it is entered.
		/// <para>NB This can lead to problems with the cursor position and typing doesn't give expected results.</para>
		/// <para>Default: False.</para>
		/// </summary>
		public bool FormatTextOnChange { get; set; } = false;
		public double DefaultFontSize { get; }
		public TextCaseType TextCase
		{
			get { return textCase; }
			set
			{
				if (textCase == value) return;
				textCase = value;
				FormatText();
			}
		}
		public bool NumericOnly
		{
			get { return numericOnly; }
			set
			{
				if (numericOnly == value) return;
				numericOnly = value;
				if (numericOnly)
					HorizontalTextAlignment = TextAlignment.End;
				Keyboard = Keyboard.Numeric;
				FormatText();
			}
		}
		public byte Decimals
		{
			get { return decimals; }
			set
			{
				if (numericOnly && decimals == value) return;
				numericOnly = true;
				HorizontalTextAlignment = TextAlignment.End;
				decimals = value;
				Keyboard = Keyboard.Numeric;
				FormatText();
			}
		}

		// --- 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;

		// --- Format text ---

		private void FormatText(bool trimText = false)
		{
			String fn = GetType().Name + ".FormatText";
			String originalText = Text;
			SamEntryTextFormatOptions options = new SamEntryTextFormatOptions()
			{
				TextCase = textCase,
				NumericOnly = numericOnly,
				Decimals = decimals,
				TrimText = trimText,
				TextInfo = textInfo
			};
			String formattedText = SamEntryTextFormatter.Format(originalText, options);

			if (!originalText.Equals(formattedText))
			{
				SaLogger.Debug(fn + " Text: " + originalText + ". Formatted: " + formattedText);
				Text = formattedText;
			}
		}

		// --- Control events ---

		private void SamEntry_TextChanged(object? sender, TextChangedEventArgs e)
		{
			if (FormatTextOnChange) FormatText();
		}
		private void SamEntry_Completed(object? sender, EventArgs e)
		{
			FormatText(trimTextOnCompletion);
		}

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