using UnityEditor;
using UnityEngine;

namespace LLM.Editor.Commands
{
    public static class CommandUtility
    {
        public static Object ResolveIdentifier(Data.CommandContext context, string logicalName)
        {
            if (string.IsNullOrEmpty(logicalName))
            {
                context.ErrorMessage = "Identifier is null or empty.";
                return null;
            }

            if (!context.IdentifierMap.TryGetValue(logicalName, out var persistentId))
            {
                // Fallback for objects that might have been selected by the user directly
                // and therefore won't be in the map.
                var foundObject = GameObject.Find(logicalName);
                if (foundObject) return foundObject;
                
                context.ErrorMessage = $"Logical name '{logicalName}' not found in the identifier map.";
                return null;
            }

            // Check if it's a scene object path
            if (persistentId.StartsWith("/"))
            {
                var go = GameObject.Find(persistentId);
                if (!go)
                {
                    context.ErrorMessage = $"Could not find GameObject at path: '{persistentId}' for logical name '{logicalName}'. It may have been deleted or renamed.";
                }
                return go;
            }

            if (int.TryParse(persistentId, out var sceneObjectId))
            {
                var go = EditorUtility.InstanceIDToObject(sceneObjectId);
                if (go == null)
                {
                    context.ErrorMessage = $"Could not find GameObject with InstanceID: '{sceneObjectId}' for logical name '{logicalName}'. It may have been deleted or renamed.";
                }
                return go;
            }
            
            // Assume it's a GUID for a project asset
            var assetPath = AssetDatabase.GUIDToAssetPath(persistentId);
            if (string.IsNullOrEmpty(assetPath))
            {
                context.ErrorMessage = $"Could not find asset path for GUID: '{persistentId}' for logical name '{logicalName}'.";
                return null;
            }
            
            return AssetDatabase.LoadAssetAtPath<Object>(assetPath);
        }
    }
}