using UnityEngine;
using UnityEngine.Playables;
using UnityEngine.Timeline;

namespace MaterialTrack.Group
{
    [TrackColor(0.1f, 0.5f, 0.2f)]
    [TrackBindingType(typeof(MaterialGroup))]
    [TrackClipType(typeof(MaterialGroupClip))]
    public class MaterialGroupTrack : TrackAsset
    {
        public override Playable CreateTrackMixer(PlayableGraph graph, GameObject go, int inputCount)
        {
            var mixerPlayable = ScriptPlayable<MaterialGroupMixer>.Create(graph, inputCount);
            var mixerBehaviour = mixerPlayable.GetBehaviour();

            // Initialize clips
            foreach (TimelineClip clip in GetClips())
            {
                var asset = clip.asset as MaterialGroupClip;
                if (asset != null)
                {
                    // Set display name of each clip
                    var data = asset.template;
                    clip.displayName = RendererTrack.BuildClipName(data);

                    // Provide the mixer to the clip's behaviour so the Inspector can find the materials
                    data.mixer = mixerBehaviour;
                }
            }

            return mixerPlayable;
        }
    }
}