using System.Collections.Generic;
using UnityEngine;

namespace ShrinkTutorial
{
    public static class ShrinkTutorialAnchorRegistry
    {
        private static readonly Dictionary<string, ShrinkTutorialAnchor> Anchors = new();

        public static void Register(ShrinkTutorialAnchor anchor)
        {
            if (!anchor || string.IsNullOrWhiteSpace(anchor.AnchorId))
                return;

            Anchors[anchor.AnchorId] = anchor;
        }

        public static void Unregister(ShrinkTutorialAnchor anchor)
        {
            if (!anchor || string.IsNullOrWhiteSpace(anchor.AnchorId))
                return;

            if (Anchors.TryGetValue(anchor.AnchorId, out var current) && current == anchor)
                Anchors.Remove(anchor.AnchorId);
        }

        public static Transform Get(string anchorId)
        {
            if (string.IsNullOrWhiteSpace(anchorId))
                return null;

            return Anchors.TryGetValue(anchorId, out var anchor) && anchor
                ? anchor.transform
                : null;
        }

        public static void Reset()
        {
            Anchors.Clear();
        }
    }
}