using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using AVFoundation;
using Foundation;
using MediaPlayer;

namespace Shared
{
    [System.Serializable]
    public class MusicInfo
    {
        static MusicInfo()
        {
            System.Threading.Tasks.Task.Run(() =>
            {
                chekcAuthOfMusic();
            });
        }
        static void chekcAuthOfMusic()
        {
            var authStatus = MPMediaLibrary.AuthorizationStatus;
            if (authStatus == MPMediaLibraryAuthorizationStatus.NotDetermined)
            {
                MPMediaLibrary.RequestAuthorization((status) =>
                {
                    if (status == MPMediaLibraryAuthorizationStatus.Authorized)
                    {
                        getNativeSongs();
                    }
                });
            }
            else if (authStatus == MPMediaLibraryAuthorizationStatus.Authorized)
            {
                getNativeSongs();
            }
        }
        static void getNativeSongs()
        {
            var itemsFromGenericQuery = new MPMediaQuery().Items;
            if (itemsFromGenericQuery == null)
            {
                return;
            }
            foreach (MPMediaItem song in itemsFromGenericQuery)
            {
                var musicInfo = new MusicInfo { SourceType = "Local", AlbumId = "0", };
                musicInfo.Title = song.ValueForProperty(new NSString("title"))?.ToString().TrimStart('<').TrimEnd('>').Replace("&", "");
                if (musicInfo.Title == null)
                {
                    musicInfo.Title = "Unkown";
                }
                musicInfo.Artist = song.ValueForProperty(new NSString("artist"))?.ToString().TrimStart('<').TrimEnd('>').Replace("&", "");
                if (musicInfo.Artist == null)
                {
                    musicInfo.Artist = "Unkown";
                }

                var ipodUrl = song.ValueForProperty(new NSString("assetURL"))?.ToString().TrimStart('<').TrimEnd('>').Replace("&", "");
                if (ipodUrl == null)
                {
                    ipodUrl = "";
                }
                musicInfo.Album = song.ValueForProperty(new NSString("albumTitle"))?.ToString().TrimStart('<').TrimEnd('>').Replace("&", "");
                if (musicInfo.Album == null)
                {
                    musicInfo.Album = "Unkown";
                }
                musicInfo.Album = musicInfo.Album.Replace("&", "&amp;");

                musicInfo.Duration = song.ValueForProperty(new NSString("playbackDuration"))?.ToString().TrimStart('<').TrimEnd('>').Replace("&", "");
                if (musicInfo.Duration == null)
                {
                    musicInfo.Duration = "0";
                }
                else
                {
                    musicInfo.Duration = ((int)(float.Parse(musicInfo.Duration) * 1000)).ToString();
                }

                //musicInfo.URL = getFileUrl(ipodUrl);
                musicInfo.ID = getFileUrl(ipodUrl);

                if (!string.IsNullOrEmpty(musicInfo.ID))
                {
                    MusicInfoList.Add(musicInfo);
                }
            }
            var sharedInstance = GlobalInfo.SharedInstance;
        }
        static string getTempPath()
        {
            var dirs = NSSearchPath.GetDirectories(NSSearchPathDirectory.CachesDirectory, NSSearchPathDomain.User, true);
            //var dirs = NSSearchPath.GetDirectories(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomain.User, true);
            if (dirs == null || dirs.Length == 0)
            {
                return "";
            }
            return dirs[0];
        }
        //Error MT5211: Native linking failed, undefined Objective-C class: HTTPServer.The symbol '_OBJC_CLASS_$_HTTPServer' could not be found in any of the libraries or frameworks linked with your application. (MT5211) (Demo.IOS)
        static string getFileUrl(string theURL)
        {
            if (string.IsNullOrEmpty(theURL))
            {
                return "";
            }
            var range = theURL.IndexOf("ipod-library:");
            var substring = theURL.Substring(range);

            var nameRange = theURL.IndexOf("?id=");
            var nameStringPart = theURL.Substring(nameRange + 4);

            var fileName = /*"SongFile_" +*/ nameStringPart;
            var filePath = getTempPath() + "/" + fileName;

            if (!NSFileManager.DefaultManager.FileExists(filePath))
            {
                var theResourceURL = NSUrl.FromString(substring);
                var songAsset = AVUrlAsset.Create(theResourceURL);// new AVUrlAsset(theResourceURL);// [AVURLAsset URLAssetWithURL: theResourceURL options: nil];

                var exportSession = new AVAssetExportSession(songAsset, AVAssetExportSessionPreset.AppleM4A);
                exportSession.OutputUrl = new NSUrl(filePath, false);// [NSURL fileURLWithPath: filePath];
                exportSession.OutputFileType = "com.apple.m4a-audio";

                exportSession.ExportAsynchronously(() =>
                {
                    if (exportSession.Status == AVAssetExportSessionStatus.Completed)
                    {
                        Shared.HDLUtils.WriteLine("音乐文件复制完成");
                    }
                    else
                    {
                        Shared.HDLUtils.WriteLine("音乐文件复制失败");
                    }
                });//248838
            }
            //return $"http://{new Net.NetWiFi().IpAddress}:9876/Path={fileName}";
            return fileName;
        }
        /// <summary>
        /// 歌曲名称
        /// </summary>
        public string Title;
        /// <summary>
        /// 歌曲的歌手名 
        /// </summary>
        public string Artist;
        /// <summary>
        /// 歌曲的专辑名     
        /// </summary>
        public string Album;
        /// <summary>
        /// 歌曲专辑ID
        /// </summary>
        public string AlbumId;
        /// <summary>
        /// 歌曲文件的路径
        /// </summary>
        public string Data;
        /// <summary>
        /// 歌曲的总播放时长
        /// </summary>
        public string Size;
        /// <summary>
        /// 歌曲的总播放时长
        /// </summary>
        public string Duration;
        /// <summary>
        /// 音乐ID
        /// </summary>
        public string ID;
        /// <summary>
        /// 网络地址
        /// </summary>
        public string URL;
        /// <summary>
        ///   文件名
        /// </summary>
        public string filename;
        /// <summary>
        /// DLNA列表名
        /// </summary>
        public string dlnalistName;
        /// <summary>
        /// 图片
        /// </summary>
        public string Image;
        /// <summary>
        /// 电台类型
        /// </summary>
        public string Cntype;
        /// <summary>
        /// 电台类型
        /// </summary>
        public string Cnkey;
        /// <summary>
        /// 是否是目录
        /// </summary>
        public bool IsDirectory = true;

        /// <summary>
        /// USB  Local URL 
        /// </summary>
        public string SourceType;
        public string SourceName;


        readonly static List<MusicInfo> musicInfoList = new List<MusicInfo> { };
        /// <summary>
        /// 获取所有的
        /// </summary>
        public static List<MusicInfo> MusicInfoList
        {
            get
            {
                return musicInfoList;
            }
        }

        public object Tag;
    }
    
}