using System;
using System.Collections;
using System.Collections.Generic;
using Kill.Core;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Video;
namespace Kill.UI.Components
{
    public class VideoCtrl : MonoBehaviour
    {
        public bool istest;
        public VideoPlayer videoPlayer;

        public bool needFullScreen = false;
        bool isFullScreen = false;
        /// <summary>
        /// 0:正常播放 1:全屏播放
        /// </summary>
        public List<RenderTexture> renderTextures;
        public RawImage windowImage;
        public RawImage fullImage;
        /// <summary>竖屏全屏UI（竖屏视频全屏时使用，在场景中配置）</summary>
        public RawImage portraitFullImage;
        /// <summary>当前使用的全屏显示目标（根据视频宽高比选择）</summary>
        RawImage currentFullImage;
        public GameObject playButton;
        public GameObject pauseButton;
        public Text totalTimeText;
        public Text nowTime;
        public Slider slider;
        bool isplaying = false;
        bool ispause = true;
        Action playOver;
        string url;
        public GameObject loading;
        private void FixedUpdate()
        {
            if (isplaying)
            {

                OnVideoPlaying();
            }

        }
        public void Init(string url, Action playOver)
        {
            if(loading)
                loading.SetActive(true);
            // 视频加载完成前隐藏窗口画面，避免显示上一个视频残留
            if (windowImage != null)
                windowImage.gameObject.SetActive(false);
            // 停止播放状态与进度记录，避免加载期间用旧数据刷新进度条/时间
            isplaying = false;
            lastFrame = 0;
            // 重置时间显示，避免加载期间显示上一个视频的旧时长
            totalTime = 0;
            nowTime.text=SecondToHour(0);
            if (totalTimeText != null)
                totalTimeText.text=SecondToHour(0);
            if (slider != null)
                slider.value=0;
            this.playOver = playOver;
            this.url = url;
            SetVideo(url);
            if (playButton != null)
            {
                playButton.SetActive(false);
            }
            if (pauseButton != null)
            {
                pauseButton.SetActive(false);
            }
            ispause = true;
        }

        public void PlayVideo()
        {
            StartCoroutine(YieldPlay());

        }



        public IEnumerator YieldPlay()
        {
            yield return new WaitForSeconds(0.1f);
            ispause = false;
            videoPlayer.Play();
            if (playButton != null)
            {
                playButton.SetActive(false);
            }
            if (pauseButton != null)
            {
                pauseButton.SetActive(true);
            }
            isplaying = true;
        }
        public void PauseVideo()
        {
            ispause = true;
            videoPlayer.Pause();
            isplaying = false;
            if (playButton != null)
            {
                playButton.SetActive(true);
            }
            if (pauseButton != null)
            {
                pauseButton.SetActive(false);
            }
        }
        public void RePlay()
        {
            videoPlayer.Stop();
            videoPlayer.frame = 0;
            PlayVideo();
        }
        public void SetVideo(string url)
        {
            videoPlayer.url = url;
            videoPlayer.prepareCompleted += VideoPrepared;
            videoPlayer.Prepare();
            if (playButton != null)
            {
                playButton.SetActive(true);
            }
        }
        public void Stop()
        {
            videoPlayer.Stop();
            videoPlayer.url = "";
            isplaying = false;
            lastFrame = 0;
            nowTime.text=SecondToHour(0);
            // 停止时清空总时长与进度条，避免残留上一个视频的显示
            totalTime = 0;
            if (totalTimeText != null)
                totalTimeText.text=SecondToHour(0);
            if (slider != null)
                slider.value=0;
        }
        int totalTime = 0;
        public void VideoPrepared(VideoPlayer player)
        {
            if (renderTextures != null && renderTextures.Count > 0)
            {
                foreach (var r in renderTextures)
                    Destroy(r);
                renderTextures.Clear();
            }
            renderTextures=new List<RenderTexture>();
            // 窗口视图：完整显示视频并居中，保持比例，多余部分留黑（竖屏视频占满高度、两侧留黑）
            RenderTexture texture = new RenderTexture((int)player.width, (int)player.height, 1);
            renderTextures.Add(texture);
            player.targetTexture = texture;
            windowImage.texture = texture;
            // 视频加载完成，重新显示窗口画面
            if (windowImage != null)
                windowImage.gameObject.SetActive(true);
            FitWindowAspect(windowImage, player.width / (float)Mathf.Max(1, (int)player.height));
            if (needFullScreen)
            {
                // 根据视频宽高比选择全屏UI：竖屏视频用竖屏全屏UI，否则用默认全屏UI
                currentFullImage = (player.width < player.height && portraitFullImage != null) ? portraitFullImage : fullImage;
                // 全屏纹理按视频分辨率创建，保证宽高比正确、不变形
                RenderTexture fullTexture = new RenderTexture((int)player.width, (int)player.height, 1);
                renderTextures.Add(fullTexture);
                currentFullImage.texture = fullTexture;
                // 显示区域铺满屏幕，保持视频比例，超出部分裁剪（cover模式：尽量铺满屏幕）
                float videoAspect = player.width / (float)Mathf.Max(1, (int)player.height);
                var fullRt = currentFullImage.rectTransform;
                var fullParent = fullRt.parent as RectTransform;
                currentFullImage.uvRect = new Rect(0, 0, 1, 1);
                if (fullParent != null && fullParent.rect.width > 0 && fullParent.rect.height > 0)
                {
                    float parentW = fullParent.rect.width;
                    float parentH = fullParent.rect.height;
                    // 检测全屏UI是否旋转了90°（横屏视频旋转90°后铺满竖屏手机屏幕）
                    float rotZ = Mathf.Abs(Mathf.DeltaAngle(fullRt.localEulerAngles.z, 0f));
                    bool rotated90 = rotZ >= 45f && rotZ <= 135f;
                    if (rotated90)
                    {
                        // 旋转90°的UI：矩形宽高互换，旋转后视觉铺满屏幕
                        fullRt.anchorMin = new Vector2(0.5f, 0.5f);
                        fullRt.anchorMax = new Vector2(0.5f, 0.5f);
                        fullRt.pivot = new Vector2(0.5f, 0.5f);
                        fullRt.sizeDelta = new Vector2(parentH, parentW);
                    }
                    else
                    {
                        fullRt.anchorMin = Vector2.zero;
                        fullRt.anchorMax = Vector2.one;
                        fullRt.pivot = new Vector2(0.5f, 0.5f);
                        fullRt.sizeDelta = Vector2.zero;
                    }
                    // 按视频比例裁剪（cover）：旋转后视频宽对应屏幕高，显示比例需取反
                    float frameAspect = rotated90 ? parentH / parentW : parentW / parentH;
                    if (Mathf.Abs(frameAspect - videoAspect) >= 0.001f)
                    {
                        if (videoAspect > frameAspect)
                        {
                            // 视频相对更宽：裁剪左右
                            float uvW = frameAspect / videoAspect;
                            currentFullImage.uvRect = new Rect((1 - uvW) / 2f, 0, uvW, 1);
                        }
                        else
                        {
                            // 视频相对更窄：裁剪上下
                            float uvH = videoAspect / frameAspect;
                            currentFullImage.uvRect = new Rect(0, (1 - uvH) / 2f, 1, uvH);
                        }
                    }
                }
            }
            videoPlayer.frame = 0;
            if (slider != null)
                slider.value = 0;
            // 总时长计算：优先用 length（秒）；切换视频时 frameCount 可能残留旧视频的帧数，作为兜底
            float duration = (float)player.length;
            if (duration > 0)
            {
                totalTime = (int)(duration + 0.5f);
            }
            else if (player.frameCount > 0 && player.frameRate > 0)
            {
                totalTime = (int)(player.frameCount / player.frameRate + 0.5f);
            }
            else
            {
                totalTime = 0;
            }
            if (totalTimeText != null)
                totalTimeText.text = SecondToHour(totalTime);

            videoPlayer.prepareCompleted -= VideoPrepared;

            player.loopPointReached += VideoOver;
            if (playButton != null)
                playButton.SetActive(true);
            nowTime.text=SecondToHour(0);
            if(loading)
                loading.SetActive(false);
        }
        /// <summary>
        /// 窗口显示适配：在窗口内完整显示视频（contain模式）并居中，保持比例，多余部分留黑
        /// 竖屏视频占满高度、两侧留黑；横屏视频占满宽度、上下留黑
        /// 仅调整windowImage（铺满窗口的RawImage）自身的尺寸，不影响窗口UI位置
        /// </summary>
        private void FitWindowAspect(RawImage image, float videoAspect)
        {
            if (image == null) return;
            var rt = image.rectTransform;
            var parent = rt.parent as RectTransform;
            float parentW = parent != null ? parent.rect.width : Screen.width;
            float parentH = parent != null ? parent.rect.height : Screen.height;

            float targetW, targetH;
            if (videoAspect >= parentW / parentH)
            {
                // 视频更宽：宽度铺满，高度按比例缩小，上下留黑
                targetW = parentW;
                targetH = parentW / videoAspect;
            }
            else
            {
                // 视频更高：高度铺满，宽度按比例缩小，左右留黑
                targetH = parentH;
                targetW = parentH * videoAspect;
            }

            rt.anchorMin = new Vector2(0.5f, 0.5f);
            rt.anchorMax = new Vector2(0.5f, 0.5f);
            rt.pivot = new Vector2(0.5f, 0.5f);
            rt.sizeDelta = new Vector2(targetW, targetH);
            rt.anchoredPosition = Vector2.zero;
            image.uvRect = new Rect(0, 0, 1, 1);
        }
        public void ShowAnimation(int dir)
        {
            Animation Anim = GetComponent<Animation>();
            if (Anim != null)
            {
                if (dir == -1)
                {
                    Anim["视频出现"].time = Anim["视频出现"].clip.length;
                    Anim["视频出现"].speed = -1;
                    Anim.Play("视频出现");
                }
                else
                {
                    Anim["视频出现"].time = 0;
                    Anim["视频出现"].speed = 1;
                    Anim.Play("视频出现");
                }
            }
        }
        long lastFrame = 0;
        /// <summary>
        /// 播放中事件（给进度条赋值）
        /// </summary>

        public void OnVideoPlaying()
        {
            if (slider == null)
                return;
            // 帧数据未就绪（重新播放/切换视频的瞬间 frameCount 可能为0），跳过本次刷新，避免除零产生 Infinity/NaN
            if (videoPlayer.frameCount <= 0)
                return;
            if (Mathf.Abs(videoPlayer.frame - lastFrame) < 1)
                return;
            slider.value = (videoPlayer.frame + 1) / (float)videoPlayer.frameCount;
            lastFrame = videoPlayer.frame;
            nowTime.text = SecondToHour((int)(totalTime * slider.value));
        }
        /// <summary>
        /// 拖动进度条
        /// </summary>
        public void PointDownUp()
        {
            //if (slider.value != lastValue)
            //{
            //    videoPlayer.frame = (long)(videoPlayer.frameCount * slider.value);
            //}
            if (slider.value >= 0.98f)
            {
                videoPlayer.Stop();
                VideoOver(videoPlayer);
                return;

            }
            videoPlayer.frame = (long)(videoPlayer.frameCount * slider.value) - 1;
            nowTime.text = SecondToHour((int)(totalTime * slider.value));
            if (!ispause)
            {
                videoPlayer.Play();
                isplaying = true;
            }
            // TeacherServer.m_instance.SendVideoProcess((long)(videoPlayer.frameCount * slider.value) - 1);
        }
        public void PointDown()
        {
            videoPlayer.Pause();
            isplaying = false;
        }
        public void Draging()
        {
            videoPlayer.frame = (long)(videoPlayer.frameCount * slider.value) - 1;
            nowTime.text = SecondToHour((int)(totalTime * slider.value));
        }
        public void VideoOver(VideoPlayer vp)
        {
            vp.loopPointReached -= VideoOver;
            isplaying = false;
            if (playButton != null)
            {
                playButton.SetActive(true);
            }
            if (pauseButton != null)
            {
                pauseButton.SetActive(false);
            }
            // 全屏播放结束后自动退出全屏
            if (isFullScreen)
                SetFullScreen(false);
            playOver?.Invoke();
            // 播放结束不重新加载视频：停止并回到开头，重置UI，等待再次播放
            videoPlayer.Stop();
            videoPlayer.frame = 0;
            lastFrame = 0;
            nowTime.text = SecondToHour(0);
            if (slider != null) slider.value = 0;
            ispause = true;
            // 重新订阅播放结束事件，保证再次播放结束后仍能触发
            vp.loopPointReached += VideoOver;
        }
        public void SetFullScreen(bool isFullScreen)
        {
            this.isFullScreen = isFullScreen;
            // 未设置过全屏目标时兜底用默认全屏UI
            if (currentFullImage == null) currentFullImage = fullImage;
            if (isFullScreen)
            {
#if UNITY_ANDROID
                AndroidStatusBar.statusBarState = AndroidStatusBar.States.Hidden;
#endif
                videoPlayer.targetTexture = renderTextures[1];
                currentFullImage.transform.parent.gameObject.SetActive(true);
                UIManager.Instance.AddBackAction(() => SetFullScreen(false));
                if (ispause)
                    PlayVideo();
            }
            else
            {
#if UNITY_ANDROID
                AndroidStatusBar.statusBarState = AndroidStatusBar.States.TranslucentOverContent;
#endif
                videoPlayer.targetTexture = renderTextures[0];
                currentFullImage.transform.parent.gameObject.SetActive(false);
                UIManager.Instance.RecoverBackAction();
            }
        }
        /// <summary>
        /// 秒转换小时
        /// </summary>
        /// <param name="time"></param>
        /// <returns></returns>
        public string SecondToHour(float time)
        {
            int hour = 0;
            int minute = 0;
            int second = 0;
            second = (int)time;

            if (second >= 60)
            {
                minute = second / 60;
                second = second % 60;
            }
            if (minute >= 60)
            {
                hour = minute / 60;
                minute = minute % 60;
            }
            string result = "";
            if (hour > 0)
            {
                result += hour + ":";

            }
            if (minute < 10)
                result += "0";
            result += minute + ":";
            if (second < 10)
                result += "0";
            result += second.ToString();
            return result;
        }
    }
}