using System;

namespace LanLib.Singleton
{
    [Flags]
    public enum SingletonDestroyCondition
    {
        /// <summary>
        /// Dont destroy automatically.
        /// </summary>
        Never = 0,

        /// <summary>
        /// Destroy on scene unload.
        /// </summary>
        SceneUnload = 1 << 0,

        /// <summary>
        /// Destroy on script recompilation. [Default]
        /// </summary>
        ReloadDomain = 1 << 1,

        /// <summary>
        /// Destroy on application mode switch from play mode to editor mode.
        /// </summary>
        ExitPlay = 1 << 2,

        /// <summary>
        /// Destroy on application mode switch from editor mode to play mode.
        /// </summary>
        ExitEdit = 1 << 3,
    }

    [Flags]
    public enum SingletonCreateCondition
    {
        /// <summary>
        /// Dont instantiate automatically.
        /// </summary>
        LazyLoad = 0,

        /// <summary>
        /// Instantiate on domain reloads. More exactly, editor mode means script compiled mostly, while runtime mode means application launched.
        /// </summary>
        ReloadDomain = 1 << 0,

        /// <summary>
        /// Instantiate on enter play mode. Editor only.
        /// </summary>
        EnterPlay = 1 << 1,
    }

    public static class Extensions
    {
        public static bool Contains(this SingletonCreateCondition con, SingletonCreateCondition con2)
            => (con & con2) != 0;

        public static bool Contains(this SingletonDestroyCondition con, SingletonDestroyCondition con2)
            => (con & con2) != 0;
    }
}