/****************************************************************************
 * Copyright (c) 2017 xiaojun
 * Copyright (c) 2017 liangxie
 * Copyright (c) 2017 imagicbell
 * Copyright (c) 2018 ~ 2022 liangxie
 * 
 * https://qframework.cn
 * https://github.com/liangxiegame/QFramework
 * https://gitee.com/liangxiegame/QFramework
 ****************************************************************************/

namespace QFramework
{
    using UnityEngine;

    /// <summary>
    /// 每个 UIPanel 对应的Data
    /// </summary>
    public interface IUIData
    {
    }

    public class UIPanelData : IUIData
    {
    }

    public abstract partial class UIPanel : QMonoBehaviour, IPanel
    {
        public Transform Transform => transform;

        IPanelLoader IPanel.Loader { get; set; }

        public PanelInfo Info { get; set; }

        public PanelState State { get; set; }

        protected IUIData mUIData;

        public override IManager Manager => UIManager.Instance;

        protected override void OnBeforeDestroy()
        {
            ClearUIComponents();
        }

        protected virtual void ClearUIComponents()
        {
        }

        public void Init(IUIData uiData = null)
        {
            mUIData = uiData;
            OnInit(uiData);
        }

        public void Open(IUIData uiData = null)
        {
            State = PanelState.Opening;
            OnOpen(uiData);
        }

        public override void Hide()
        {
            State = PanelState.Hide;
            base.Hide();
        }


        protected virtual void OnInit(IUIData uiData = null)
        {

        }

        protected virtual void OnOpen(IUIData uiData = null)
        {

        }

        /// <summary>
        /// avoid override in child class
        /// </summary>
        protected sealed override void OnDestroy()
        {
            base.OnDestroy();
        }

        /// <summary>
        /// 关闭,不允许子类调用
        /// </summary>
        void IPanel.Close(bool destroyed)
        {
            Info.UIData = mUIData;
            mOnClosed?.Invoke();
            mOnClosed = null;
            Hide();
            State = PanelState.Closed;
            OnClose();

            if (destroyed)
            {
                Destroy(gameObject);
            }

            var panelInterface = this as IPanel;
            panelInterface.Loader.Unload();
            UIKit.Config.PanelLoaderPool.RecycleLoader(panelInterface.Loader);
            panelInterface.Loader = null;

            mUIData = null;
        }

        protected void CloseSelf()
        {
            UIKit.ClosePanel(this);
        }

        protected void Back()
        {
            UIKit.Back(name);
        }

        /// <summary>
        /// 必须使用这个
        /// </summary>
        protected abstract void OnClose();

        private System.Action mOnClosed;

        public void OnClosed(System.Action onPanelClosed)
        {
            mOnClosed = onPanelClosed;
        }


#if VR
        private void Update()
        {
            transform.localEulerAngles = Vector3.zero;
        }
#endif
    }
}