using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Cysharp.Threading.Tasks;
using RenderStreaming;
using Stary.Evo;
using UnityEngine;
using Unity.XR.XREAL;
using CameraType = Unity.XR.XREAL.CameraType;
#if UNITY_ANDROID && !UNITY_EDITOR
    using GalleryDataProvider =  Unity.XR.XREAL.NativeGalleryDataProvider;
#else
using GalleryDataProvider = Unity.XR.XREAL.MockGalleryDataProvider;
#endif

public class XrealMixedRecorder : IVideoRecorder, IController
{
    public enum ResolutionLevel
    {
        High,
        Middle,
        Low
    }

    public ResolutionLevel resolutionLevel = ResolutionLevel.High;
    public BlendMode blendMode = BlendMode.Blend;
    public AudioState audioState = AudioState.ApplicationAndMicAudio;
    public CaptureSide captureside = CaptureSide.Single;
    public bool useGreenBackGround = false;

    private XREALVideoCapture _videoCapture;

    public bool IsRecording => _videoCapture != null && _videoCapture.IsRecording;
    public Action OnStartedRecordingVideo { get; set; }
    public Action<string> OnStoppedRecordingVideoAction { get; set; }

    private GalleryDataProvider _galleryDataTool;


    /// <summary> Save the video to Application.persistentDataPath. </summary>
    /// <value> The full pathname of the video save file. </value>
    private string VideoSaveExtension => Path.Combine(Application.persistentDataPath, "Recording");

    private string VideoSavePath
    {
        get
        {
            var timeStamp = Time.time.ToString().Replace(".", "").Replace(":", "");
            var filename =
                $"{this.GetSystem<IGlobalConfigSystem>().GetConnectionId()}{timeStamp}.mp4";
            return Path.Combine(Application.persistentDataPath, VideoSaveExtension, filename);
        }
    }

    private string _videoSavePath;

    public void StartRecording()
    {
        _videoSavePath = VideoSavePath;
        if (_videoCapture == null)
            CreateVideoCapture(StartVideoCapture);
        else if (_videoCapture.IsRecording)
            StopVideoCapture();
        else
            StartVideoCapture();
    }

    public void StopRecording()
    {
        if (_videoCapture == null || !_videoCapture.IsRecording)
        {
            Debug.LogError("当前没有正在进行的 XREAL 录制");
            return;
        }

        StopVideoCapture();
    }

    /// <summary> Stops video capture. </summary>
    public void StopVideoCapture()
    {
        if (_videoCapture == null || !_videoCapture.IsRecording)
        {
            Debug.LogWarning("Can not stop video capture!");
            return;
        }

        Debug.Log("Stop Video Capture!");
        _videoCapture.StopRecordingAsync(OnStoppedRecordingVideo);
    }

    /// <summary> Executes the 'stopped recording video' action. </summary>
    /// <param name="result"> The result.</param>
    private void OnStoppedRecordingVideo(XREALVideoCapture.VideoCaptureResult result)
    {
        if (!result.success)
        {
            Debug.Log("Stopped Recording Video Faild!");
            return;
        }

        Debug.Log("Stopped Recording Video!");
        _videoCapture.StopVideoModeAsync(OnStoppedVideoCaptureMode);
    }

    /// <summary> Executes the 'stopped video capture mode' action. </summary>
    /// <param name="result"> The result.</param>
    private async void OnStoppedVideoCaptureMode(XREALVideoCapture.VideoCaptureResult result)
    {
        Debug.Log("Stopped Video Capture Mode!");

        var encoder = _videoCapture.GetContext().GetEncoder() as VideoEncoder;
        var path = encoder.EncodeConfig.outPutPath;
        var filename = string.Format("Xreal_Shot_Video_{0}.mp4",
            DateTimeOffset.UtcNow.ToUnixTimeMilliseconds().ToString());

        await DelayInsertVideoToGallery(path, filename, "Record");
        OnStoppedRecordingVideoAction?.Invoke(path);
        // Release video capture resource.
        _videoCapture.Dispose();
        _videoCapture = null;
    }

    /// <summary> 延迟将视频插入相册，确保视频文件已完全写入 </summary>
    /// <param name="originFilePath"> 视频文件路径 </param>
    /// <param name="displayName"> 显示名称 </param>
    /// <param name="folderName"> 文件夹名称 </param>
    private async UniTask DelayInsertVideoToGallery(string originFilePath, string displayName, string folderName)
    {
        await UniTask.DelayFrame(100);
        InsertVideoToGallery(originFilePath, displayName, folderName);
    }

    /// <summary> 将视频插入到系统相册中 </summary>
    /// <param name="originFilePath"> 视频文件的原始路径 </param>
    /// <param name="displayName"> 视频在相册中显示的名称 </param>
    /// <param name="folderName"> 相册文件夹名称 </param>
    public void InsertVideoToGallery(string originFilePath, string displayName, string folderName)
    {
        Debug.LogFormat("InsertVideoToGallery: {0}, {1} => {2}", displayName, originFilePath, folderName);
        if (_galleryDataTool == null) _galleryDataTool = new GalleryDataProvider();

        _galleryDataTool.InsertVideo(originFilePath, displayName, folderName);
    }

    private void CreateVideoCapture(Action callback)
    {
        XREALVideoCaptureUtility.CreateAsync(false, delegate(XREALVideoCapture videoCapture)
        {
            Debug.Log("Created VideoCapture Instance!");
            if (videoCapture != null)
            {
                _videoCapture = videoCapture;
                callback?.Invoke();
            }
            else
            {
                Debug.LogError("Failed to create VideoCapture Instance!");
            }
        });
    }

    public void StartVideoCapture()
    {
        if (_videoCapture.IsRecording)
        {
            Debug.LogWarning("Can not start video capture!");
            return;
        }

        var cameraParameters = new CameraParameters();
        var cameraResolution = GetResolutionByLevel(resolutionLevel);
        cameraParameters.cameraType = CameraType.RGB;
        cameraParameters.hologramOpacity = 0.0f;
        cameraParameters.frameRate = NativeConstants.RECORD_FPS_DEFAULT;
        cameraParameters.cameraResolutionWidth = cameraResolution.width;
        cameraParameters.cameraResolutionHeight = cameraResolution.height;
        cameraParameters.pixelFormat = CapturePixelFormat.PNG;
        cameraParameters.blendMode = blendMode;
        // Set audio state, audio record needs the permission of "android.permission.RECORD_AUDIO",
        // Add it to your "AndroidManifest.xml" file in "Assets/Plugin".
        cameraParameters.audioState = audioState;
        cameraParameters.captureSide = captureside;
        cameraParameters.backgroundColor = useGreenBackGround ? Color.green : Color.black;

        _videoCapture.StartVideoModeAsync(cameraParameters, OnStartedVideoCaptureMode, true);
    }


    private Resolution GetResolutionByLevel(ResolutionLevel level)
    {
        var resolutions =
            XREALVideoCaptureUtility.SupportedResolutions.OrderByDescending((res) => res.width * res.height);
        var resolution = new Resolution();
        switch (level)
        {
            case ResolutionLevel.High:
                resolution = resolutions.ElementAt(0);
                break;
            case ResolutionLevel.Middle:
                resolution = resolutions.ElementAt(1);
                break;
            case ResolutionLevel.Low:
                resolution = resolutions.ElementAt(2);
                break;
            default:
                break;
        }

        return resolution;
    }

    private void OnStartedVideoCaptureMode(XREALVideoCapture.VideoCaptureResult result)
    {
        if (!result.success)
        {
            Debug.Log("Started Video Capture Mode faild!");
            return;
        }

        Debug.Log("Started Video Capture Mode!");

        _videoCapture.StartRecordingAsync(_videoSavePath, (a) => OnStartedRecordingVideo?.Invoke());
    }

    public IArchitecture GetArchitecture()
    {
        return MainArchitecture.Interface;
    }
}