using System;
using System.Text.RegularExpressions;
using Vinno.IUS.Common.Log;
using Vinno.vCloud.Protocol.Infrastructures;

namespace Vinno.vCloud.Common.Storage
{
    public class FileTokenInfo
    {
        /// <summary>
        /// The  token split characters
        /// </summary>
        public static string[] TokenSplitor = new string[] { "!U$" };
        /// <summary>
        /// The storage type
        /// </summary>
        public StorageType StorageType { get; }

        /// <summary>
        /// Token id for Vinno Storage service
        /// </summary>
        public string TokenId { get; }

        /// <summary>
        /// If 'StorageType' is default,this is vinno storage url, for example:cloud.xinglinghui.com:9097
        /// If 'StorageType' is ufile, this is a ufile download url, for example:http://download.fis.plus/Flyinsono_Windows_1.7.21.19487.exe
        /// </summary>
        public string Url { get; private set; }

        public FileTokenInfo(string fileTokenString)
        {
            //parse file token string, formates are
            //Default|cloud.xinglinghui.com:9097/TokenId
            //UFile{TokenSplitor}http://download.fis.plus/Flyinsono_Windows_1.7.21.19487.exe
            //var infors = Regex.Split(fileTokenString, TokenSplitor, RegexOptions.IgnoreCase);
            var infors = fileTokenString?.Split(TokenSplitor, StringSplitOptions.None);
            if (infors!=null&&infors.Length == 2)
            {
                if (Enum.TryParse<StorageType>(infors[0], out var type))
                {
                    StorageType = type;                    
                }
                if (StorageType == StorageType.ObjectStorage)
                {
                    Url = infors[1];
                    var fileName = string.Empty;
                    var values = Url.Split('_');
                    var length = values.Length;
                    if (length > 1)
                    {
                        fileName = values[length - 1];
                    }
                    var urlValues = fileName.Split('.');
                    if (urlValues.Length > 1)
                    {
                        TokenId = urlValues[0];
                    }
                }
                else
                {
                    var subInfors = infors[1].Split(new char[] { '/' }, StringSplitOptions.RemoveEmptyEntries);                    
                    if (subInfors.Length == 2)
                    {
                        Url = subInfors[0];
                        TokenId = subInfors[1];
                    }
                    else
                    {
                        Logger.WriteLineWarn($"Invalid file token string {fileTokenString}");
                    }
                }
            }
            else
            {
                Logger.WriteLineWarn($"Invalid file token string em {fileTokenString}");
            }
        }

        /// <summary>
        /// update url
        /// </summary>
        /// <param name="newUrl"></param>
        public void UpdateUrl(string newUrl) 
        {
            Url = newUrl;
        }
    }
}