using DG.Tweening;
using FairyGUI;
using UnityEngine;
using UnityEngine.Video;

namespace BallKingdomCrush
{
    public static class VideoPlayerHandover
    {
        private static VideoPlayer currentPlayer;
        private static Transform originalParent;
        private static GLoader originalLoader;

        /// <summary>
        /// 接管播放器，切换父物体和绑定loader
        /// </summary>
        public static void TakeOver(VideoPlayer player, Transform newParent, GLoader newLoader)
        {
            if (player == null)
            {
                Debug.LogWarning("[VideoPlayerHandover] TakeOver: player is null");
                return;
            }

            currentPlayer = player;

            // 只记录第一次的父物体和loader（方便后面还原）
            if (originalParent == null)
                originalParent = player.transform.parent;
            if (originalLoader == null && newLoader != null)
                originalLoader = newLoader;

            // 切父物体
            player.transform.SetParent(newParent, false);

            // 延迟绑定到新loader显示，确保 RenderTexture 已准备好
            DOTween.To(() => 0, _ =>
            {
                if (player.targetTexture != null && IsValidRenderTexture(player.targetTexture))
                {
                    newLoader.texture = new NTexture(player.targetTexture);
                    newLoader.visible = true;
                    Debug.Log($"[VideoPlayerHandover] TakeOver: bound to loader {newLoader.name}, texture size: {player.targetTexture.width}x{player.targetTexture.height}");
                }
                else
                {
                    Debug.LogWarning("[VideoPlayerHandover] TakeOver: targetTexture invalid or not ready");
                }
            }, 0, 0.05f); // 延迟 0.05s
        }

        /// <summary>
        /// 归还播放器到原父物体和loader
        /// </summary>
        public static void Return()
        {
            if (currentPlayer == null)
            {
                Debug.LogWarning("[VideoPlayerHandover] Return: currentPlayer is null");
                return;
            }

            // 切回原父物体
            currentPlayer.transform.SetParent(originalParent, false);

            // 绑定回原loader显示
            if (originalLoader != null)
            {
                if (currentPlayer.targetTexture != null && IsValidRenderTexture(currentPlayer.targetTexture))
                {
                    originalLoader.texture = new NTexture(currentPlayer.targetTexture);
                    originalLoader.visible = true;
                    Debug.Log($"[VideoPlayerHandover] Return: bound back to original loader {originalLoader.name}, texture size: {currentPlayer.targetTexture.width}x{currentPlayer.targetTexture.height}");
                }
                else
                {
                    Debug.LogWarning("[VideoPlayerHandover] Return: targetTexture invalid or not ready");
                }
            }

            // 清除引用，下次接管会重新记录
            currentPlayer = null;
            originalParent = null;
            originalLoader = null;
        }

        /// <summary>
        /// RenderTexture 尺寸合法性检查
        /// </summary>
        private static bool IsValidRenderTexture(RenderTexture rt)
        {
            return rt != null && rt.width > 0 && rt.height > 0;
        }
    }
}