using System.Collections;

namespace AibisDream.FixSystem
{
    public enum FixTransitionMode
    {
        Animated,
        Immediate
    }

    public readonly struct FixTransition
    {
        public readonly FixSceneMode? From;
        public readonly FixSceneMode To;
        public readonly string Args;
        public readonly FixTransitionMode Mode;

        public FixTransition(FixSceneMode? from, FixSceneMode to, string args, FixTransitionMode mode)
        {
            From = from;
            To = to;
            Args = args ?? "";
            Mode = mode;
        }
    }

    /// <summary>
    /// A cue is a directed scene orchestration unit for a Fix mode.
    /// It owns camera, timeline, UI and interaction setup for entering or leaving that mode.
    /// </summary>
    public interface IFixSceneCue
    {
        FixSceneMode Mode { get; }

        IEnumerator Enter(FixTransition transition);

        IEnumerator Exit(FixTransition transition)
        {
            yield break;
        }

        IEnumerator EnterImmediate(FixTransition transition)
        {
            yield break;
        }
    }
}