using System;
using UnityEditor;
using UnityEngine;
using Object = UnityEngine.Object;

namespace SubAssetsToolbox.Editor
{
    /// <summary>
    /// When the user creates a new asset via the right-click menu and the selected asset is a main asset,
    /// this class adds it to the target asset as a sub-asset.
    /// </summary>
    public class AssetRelocator : AssetModificationProcessor
    {
        public static Object LastSelectionOnRightClick;

        static void OnWillCreateAsset(string path)
        {
            // Used to check if the creation happened as a right-click on an asset
            if (LastSelectionOnRightClick == null) return;
            
            string newParentPath = AssetDatabase.GetAssetPath(LastSelectionOnRightClick);

            if (TypeChecker.HasDefaultAction(path, newParentPath)) return; // There's already a default action
            if (!TypeChecker.ValidateSubAssetType(path, false)) return; // Can't be a sub-asset
            if (!TypeChecker.ValidateDestinationType(newParentPath)) return; // Can't contain a sub-asset
             
            EditorApplication.delayCall += () => RelocateAsset(path);
        }

        private static void RelocateAsset(string path)
        {
            Type t = AssetDatabase.GetMainAssetTypeAtPath(path);
            Object justCreatedAsset = AssetDatabase.LoadAssetAtPath(path, t);
            string parentObjectPath = AssetDatabase.GetAssetPath(LastSelectionOnRightClick);
            
            SubAssetsToolbox.AddSubAsset(parentObjectPath, justCreatedAsset, out _);            
            
            AssetDatabase.DeleteAsset(path);
            
            AssetDatabase.SaveAssets();
            AssetDatabase.Refresh();
        }
    }
}