using Connected.Annotations;
using Connected.Utilities;
using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Web;

namespace Connected.Components;

public partial class TextField<T> : DebouncedInput<T>
{
    private Mask? _maskReference;

	public Input<string> InputReference { get; private set; }

	/// <summary>
	/// Type of the input element. It should be a valid HTML5 input type.
	/// </summary>
	[Parameter]
	[Category(CategoryTypes.FormComponent.Behavior)]
	public InputType InputType { get; set; } = InputType.Text;

	internal override InputType GetInputType() => InputType;

	private string GetCounterText() => Counter == null ? string.Empty : (Counter == 0 ? (string.IsNullOrEmpty(Text) ? "0" : $"{Text.Length}") : ((string.IsNullOrEmpty(Text) ? "0" : $"{Text.Length}") + $" / {Counter}"));

	/// <summary>
	/// Show clear button.
	/// </summary>
	[Parameter]
	[Category(CategoryTypes.FormComponent.Behavior)]
	public bool Clearable { get; set; } = false;

	/// <summary>
	/// Button click event for clear button. Called after text and value has been cleared.
	/// </summary>
	[Parameter] public EventCallback<MouseEventArgs> OnClearButtonClick { get; set; }

    protected string ClassList =>
		new CssBuilder("mud-input-input-control")
		.AddClass(Class)
		.Build();

	public override ValueTask FocusAsync()
	{
		if (_mask == null)
			return InputReference.FocusAsync();
		else
			return _maskReference.FocusAsync();
	}

	public override ValueTask BlurAsync()
	{
		if (_mask == null)
			return InputReference.BlurAsync();
		else
			return _maskReference.BlurAsync();
	}

	public override ValueTask SelectAsync()
	{
		if (_mask == null)
			return InputReference.SelectAsync();
		else
			return _maskReference.SelectAsync();
	}

	public override ValueTask SelectRangeAsync(int pos1, int pos2)
	{
		if (_mask == null)
			return InputReference.SelectRangeAsync(pos1, pos2);
		else
			return _maskReference.SelectRangeAsync(pos1, pos2);
	}

	protected override void ResetValue()
	{
		if (_mask == null)
			InputReference.Reset();
		else
			_maskReference.Reset();
		base.ResetValue();
	}

	/// <summary>
	/// Clear the text field, set Value to default(T) and Text to null
	/// </summary>
	/// <returns></returns>
	public Task Clear()
	{
		if (_mask == null)
			return InputReference.SetText(null);
		else
			return _maskReference.Clear();
	}

	/// <summary>
	/// Sets the input text from outside programmatically
	/// </summary>
	/// <param name="text"></param>
	/// <returns></returns>
	public async Task SetText(string text)
	{
		if (_mask == null)
		{
			if (InputReference != null)
				await InputReference.SetText(text);
			return;
		}
		await _maskReference.Clear();
		_maskReference.OnPaste(text);
	}


	private IMask _mask = null;

	/// <summary>
	/// Provide a masking object. Built-in masks are PatternMask, MultiMask, RegexMask and BlockMask
	/// Note: when Mask is set, TextField will ignore some properties such as Lines, Pattern or HideSpinButtons, OnKeyDown and OnKeyUp, etc.
	/// </summary>
	[Parameter]
	[Category(CategoryTypes.General.Data)]
	public IMask Mask
	{
		get => _maskReference?.MaskKind ?? _mask; // this might look strange, but it is absolutely necessary due to how Mask works.
		set
		{
			_mask = value;
		}
	}

	protected override Task SetValueAsync(T value, bool updateText = true)
	{
		if (_mask != null)
		{
			var textValue = Converter.Convert(value);
			_mask.SetText(textValue);
			textValue = Mask.GetCleanText();
			value = Converter.ConvertBack(textValue);
		}
		return base.SetValueAsync(value, updateText);
	}

	protected override Task SetTextAsync(string text, bool updateValue = true)
	{
		if (_mask != null)
		{
			_mask.SetText(text);
			text = _mask.Text;
		}
		return base.SetTextAsync(text, updateValue);
	}

	private async Task OnMaskedValueChanged(string s)
	{
		await SetTextAsync(s);
	}
}