// MaterialEmissionListDemo.cs
// A glow switch: click the button and the objects glow, click again and they fade out.
//
// Setup:
//   1. ClickObject: pick the button players click.
//   2. GlowTargets: add the objects that should glow (everything inside them glows too).
//   3. Pick the glow colour and strength, and how fast it fades.
// Want each object in its own colour? Fill in GlowColors: entry #0 colours GlowTargets #0, #1 colours #1, and so on.
// Objects without an entry use GlowColor.
using System.Collections.Generic;
using IHXR.Simulation;

public class MaterialEmissionListDemo : ScriptBase
{
    [Header("Button and objects")]
    [Tooltip("The button players click to switch the glow on and off.")]
    public SceneObject ClickObject;
    [Tooltip("The objects that glow, with everything inside them.")]
    public List<SceneObject> GlowTargets = new List<SceneObject>();

    [Header("Glow")]
    [Tooltip("The glow colour for every object (unless GlowColors gives it its own).")]
    public Color GlowColor = new Color(0.25f, 0.8f, 1f);
    [Tooltip("How bright the glow is.")]
    [Range(0f, 10f)]
    public float GlowStrength = 2f;
    [Tooltip("Seconds to fade in and out. 0 = switches at once.")]
    [Range(0f, 5f)]
    public float FadeSeconds = 0.4f;
    [Tooltip("Glowing when the world starts.")]
    public bool StartLit = false;
    [Tooltip("Optional: a colour per object, in the same order as GlowTargets.")]
    public List<Color> GlowColors = new List<Color>();

    [Header("Button")]
    public string HintText = "Toggle glow";
    public bool HighlightButton = true;
    public float InteractDistance = 10f;

    bool lit;

    public override void Start()
    {
        lit = StartLit;
        if (lit)
            ApplyGlow(0f);

        if (ClickObject == null || ClickObject.IsNull)
        {
            LogWarning("Pick a ClickObject (the button players click).");
            return;
        }
        if (GlowTargets == null || GlowTargets.Count == 0)
            LogWarning("Add at least one object to GlowTargets.");

        MakeInteractable(ClickObject, OnClicked, HighlightButton, null, true, InteractDistance, HintText);
    }

    void OnClicked(InteractionInfo info)
    {
        lit = !lit;
        ApplyGlow(FadeSeconds);
    }

    void ApplyGlow(float fadeSeconds)
    {
        if (GlowTargets == null)
            return;

        for (int i = 0; i < GlowTargets.Count; i++)
        {
            SceneObject target = GlowTargets[i];
            if (target == null || target.IsNull)
                continue;

            if (lit)
            {
                Color color = GlowColors != null && i < GlowColors.Count ? GlowColors[i] : GlowColor;
                SetObjectGlow(target, color, GlowStrength, fadeSeconds);
            }
            else
            {
                ClearObjectGlow(target, fadeSeconds);
            }
        }
    }
}