using System;
using System.Diagnostics.CodeAnalysis;

namespace JavaScriptEngineSwitcher.ChakraCore.JsRt
{
	/// <summary>
	/// Attributes of a runtime
	/// </summary>
	[Flags]
	internal enum JsRuntimeAttributes
	{
		/// <summary>
		/// No special attributes
		/// </summary>
		None = 0x00000000,

		/// <summary>
		/// The runtime will not do any work (such as garbage collection) on background threads
		/// </summary>
		DisableBackgroundWork = 0x00000001,

		/// <summary>
		/// The runtime should support reliable script interruption. This increases the number of
		/// places where the runtime will check for a script interrupt request at the cost of a
		/// small amount of runtime performance.
		/// </summary>
		AllowScriptInterrupt = 0x00000002,

		/// <summary>
		/// Host will call <c>Idle</c>, so enable idle processing. Otherwise, the runtime will manage
		/// memory slightly more aggressively.
		/// </summary>
		EnableIdleProcessing = 0x00000004,

		/// <summary>
		/// Runtime will not generate native code
		/// </summary>
		DisableNativeCodeGeneration = 0x00000008,

		/// <summary>
		/// Using <c>eval</c> or <c>Function</c> constructor will throw an exception
		/// </summary>
		[SuppressMessage("StyleCop.CSharp.DocumentationRules", "SA1650:ElementDocumentationMustBeSpelledCorrectly", Justification = "Eval is a valid function name.")]
		DisableEval = 0x00000010,

		/// <summary>
		/// Runtime will enable all experimental features
		/// </summary>
		EnableExperimentalFeatures = 0x00000020,

		/// <summary>
		/// Calling <c>JsSetException</c> will also dispatch the exception to the script debugger
		/// (if any) giving the debugger a chance to break on the exception
		/// </summary>
		DispatchSetExceptionsToDebugger = 0x00000040,

		/// <summary>
		/// Disable Failfast fatal error on OOM
		/// </summary>
		DisableFatalOnOOM = 0x00000080,

		/// <summary>
		/// Runtime will not allocate executable code pages.
		/// This also implies that Native Code generation will be turned off.
		/// Note that this will break JavaScript stack decoding in tools like WPA since they
		/// rely on allocation of unique thunks to interpret each function and allocation of
		/// those thunks will be disabled as well.
		/// </summary>
		DisableExecutablePageAllocation = 0x00000100
	}
}