using Codice.Client.Common;
using System;
using System.Collections.Generic;
using System.Linq;
using UnityEditor;
using UnityEditor.Experimental.GraphView;
using UnityEditor.Search;
using UnityEditor.SearchService;
using UnityEngine;

namespace AI.BT
{
    internal class NodeSearchWindow : ScriptableObject, ISearchWindowProvider
    {
        private Texture2D _indentation;

        //passes node type and mouse position
        public Action<System.Type, Vector2> OnEntrySelected { get; internal set; }

        public void OnEnable()
        {
            _indentation = new Texture2D(1, 1);
            _indentation.SetPixel(0, 0, Color.clear);
            _indentation.Apply();
        }
  
        public List<SearchTreeEntry> CreateSearchTree(SearchWindowContext context)
        {
            var entry = new List<SearchTreeEntry>() { new SearchTreeGroupEntry(new GUIContent("Create New Node"), 0)};

            CreateNodeGroup(typeof(BTNode), 1, ref entry);

            return entry;
        }

        public bool OnSelectEntry(SearchTreeEntry SearchTreeEntry, SearchWindowContext context)
        {
            OnEntrySelected?.Invoke(SearchTreeEntry.userData as System.Type, context.screenMousePosition);

            return true;
        }
        
        private void CreateNodeGroup(System.Type nodetype, int level, ref List<SearchTreeEntry> entry )
        {
            foreach(var type in TypeCache.GetTypesDerivedFrom(nodetype).Where(t => t.BaseType == nodetype))
            {
                var displayname = BTNode.GetDisplayName(type);
                if (type.IsAbstract)
                {
                    entry.Add(new SearchTreeGroupEntry(new GUIContent(displayname), level));

                    CreateNodeGroup(type, level + 1, ref entry);
                }
                else
                {
                  
                    entry.Add(new SearchTreeEntry(new GUIContent(displayname, _indentation)) { level = level, userData = type });
                }
            }
            
        }

      
    }
}