using System;

namespace Vanara.PInvoke
{
	/// <summary>Common properties and methods for errors.</summary>
	public interface IErrorProvider
	{
		/// <summary>Gets a value indicating whether this error represents a failure.</summary>
		/// <value><see langword="true" /> if failed; otherwise, <see langword="false" />.</value>
		bool Failed { get; }

		/// <summary>Gets a value indicating whether this error represents a success.</summary>
		/// <value><see langword="true" /> if succeeded; otherwise, <see langword="false" />.</value>
		bool Succeeded { get; }

		/// <summary>Gets an <see cref="Exception"/> from this error.</summary>
		/// <param name="message">An optional message to add to the exception.</param>
		/// <returns>A correlated <see cref="Exception"/> for this error.</returns>
		Exception GetException(string message = null);

		/// <summary>Throws an equivalent <c>Exception</c> for this error if it is a failure.</summary>
		/// <param name="message">An optional message to add to the exception.</param>
		void ThrowIfFailed(string message = null);

		/// <summary>Converts this error to an <see cref="HRESULT"/>.</summary>
		/// <returns>An equivalent <see cref="HRESULT"/>.</returns>
		HRESULT ToHRESULT();
	}
}