using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UIElements;
using UnityEngine.Events;
namespace BITKit
{
    public struct NewSubMenu
    {
        public string name;
        public Vector2 position;
        public IEnumerable<SubAction> actions;
    }
    public struct SubAction
    {
        public string name;
        public UnityAction action;
    }
    public class SubMenu : BITBehavior
    {
        [Header(Constant.Header.Components)]
        public UIDocument document;
        Label label;
        VisualElement context;
        VisualElement root;
        void Start()
        {
            Data.AddListener<IEnumerable<SubAction>>(OnAction);
            Data.AddListener<NewSubMenu>(OnContextMenu);
            root = document.rootVisualElement;
            label = root.Q<Label>("Label");
            context = root.Q("Context");
            SetActive(false);
            root.RegisterCallback<PointerLeaveEvent>(x =>
            {
                SetActive(false);
            });
        }
        void OnContextMenu(NewSubMenu contextMenu)
        {
            label.text = contextMenu.name;
            OnAction(contextMenu.actions);
            root.style.left = contextMenu.position.x - 4f;
            root.style.top = contextMenu.position.y - 4f;
        }
        void OnAction(IEnumerable<SubAction> actions)
        {
            SetActive(true);
            actions.ForEach(x =>
            {
                var button = new Button();
                button.text = x.name;
                button.clicked += () =>
                {
                    x.action.Invoke();
                    SetActive(false);
                };
                context.Add(button);
            });
        }
        public override void SetActive(bool active)
        {
            if (active)
            {
            }
            else
            {
                context.Clear();
            }
            document.rootVisualElement.SetActive(active);
        }
    }
}