#nullable enable
using System;
using System.Threading.Tasks;
using Windows.ApplicationModel.DataTransfer;
 
using WindowsClipboard = Windows.ApplicationModel.DataTransfer.Clipboard;
 
namespace Microsoft.Maui.ApplicationModel.DataTransfer
{
	partial class ClipboardImplementation : IClipboard
	{
		public Task SetTextAsync(string? text)
		{
			var dataPackage = new DataPackage();
			dataPackage.SetText(text);
			WindowsClipboard.SetContent(dataPackage);
			return Task.CompletedTask;
		}
 
		public bool HasText
			=> WindowsClipboard.GetContent().Contains(StandardDataFormats.Text);
 
		public Task<string?> GetTextAsync()
		{
			var clipboardContent = WindowsClipboard.GetContent();
			return clipboardContent.Contains(StandardDataFormats.Text)
				? clipboardContent.GetTextAsync().AsTask()
				: Task.FromResult<string?>(null);
		}
 
		void StartClipboardListeners()
			=> WindowsClipboard.ContentChanged += ClipboardChangedEventListener;
 
		void StopClipboardListeners()
			=> WindowsClipboard.ContentChanged -= ClipboardChangedEventListener;
 
		/// <summary>
		/// The event listener for triggering the <see cref="ClipboardContentChanged"/> event.
		/// </summary>
		/// <param name="sender">The object that initiated the event.</param>
		/// <param name="val">The value for this event.</param>
		public void ClipboardChangedEventListener(object? sender, object val) => OnClipboardContentChanged();
	}
}