using FairyGUI;
using System;
using System.Collections.Generic;
using UnityEngine;
using XGame.Framework.UI;

namespace XGame.Framework.FGUI
{
    /// <summary>
    /// FGUI相关的操作都在IUIViewModel的实现类里
    /// </summary>
    public abstract class FguiViewModel : IUIViewModel, IUIVMInternal, IDisposable
    {
        protected GComponent Panel { get; private set; }

        public Vector3 Pos
        {
            get=> Panel.position;
            set => Panel.position = value;
        }

        public Vector2 Scale
        {
            get => Panel.scale;
            set => Panel.scale = value;
        }

        public ScrollPane Scroll =>Panel.scrollPane;

        public EventListener PanelEvent => Panel.onClick;
        private HashSet<INestedInternal> _nestedViews;

        void IUIVMInternal.Init(IUIPanel uiPanel, IUIViewAdapter adapter)
        {
            Init((uiPanel as FguiPanel).Panel, adapter);
        }
        void IUIVMInternal.Init(IUINested nested, IUIViewAdapter adapter)
        {
            Init((nested as FguiNested).Component, adapter);
        }
        void IUIVMInternal.EnableChildren(object intent)
        {
            if (_nestedViews == null)
                return;
            foreach(var nestedView in _nestedViews)
            {
                nestedView.EnableByParent(intent);
            }
        }

        void IUIVMInternal.DisableChildren()
        {
            if (_nestedViews == null)
                return;
            foreach (var nestedView in _nestedViews)
            {
                nestedView.DisableByParent();
            }
        }

        private void Init(GComponent panel, IUIViewAdapter adapter)
        {
            Panel = panel;
            BindComponents(panel, adapter);
            CustomBind(panel, adapter);
        }
        protected abstract void BindComponents(GComponent panel, IUIViewAdapter adapter);
        /// <summary>
        /// 自定义绑定，有需要的重载
        /// </summary>
        /// <param name="panel"></param>
        protected virtual void CustomBind(GComponent panel, IUIViewAdapter adapter)
        {
        }

        public void AddChild(INestedView nestedView)
        {
            if (nestedView is INestedInternal temp)
            {
                _nestedViews ??= new HashSet<INestedInternal>();
                _nestedViews.Add(temp);
            }
        }
        public void RemoveChild(INestedView nestedView)
        {
            if (_nestedViews == null) return;
            if (nestedView is INestedInternal temp)
            {
                _nestedViews.Remove(temp);
            }
        }

        /// <summary>
        /// 结束ui的所有tween
        /// </summary>
        public void KillTweens(bool complete = false)
        {
            GTween.Kill(Panel, complete);
        }

        void IDisposable.Dispose()
        {
            if (_nestedViews != null)
            {
                foreach(var nestedView in _nestedViews)
                {
                    (nestedView as IDisposable)?.Dispose();
                }
                _nestedViews.Clear();
            }
        }
    }
}