using CP.Common;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Web;
using System.Xml;

namespace CP.Web
{
    /// <summary>
    /// 资源文件管理 by JNswins
    /// </summary>
    public class ResourcesConfigs
    {
        private ResourcesConfigs() { }

        private static string configPath = AppDomain.CurrentDomain.BaseDirectory + "Config\\Resources.config";
        private static ResourcesConfigInfo _config = null;
        private static object lockObject = new object();

        static ResourcesConfigs()
        {
            LoadConfig();
        }
        /// <summary>
        /// 加载配置
        /// </summary>
        public static void LoadConfig()
        {
            var config = new ResourcesConfigInfo();
            if (File.Exists(configPath))
            {
                var doc = new XmlDocument();
                doc.Load(configPath);
                var node = doc.SelectSingleNode("Resources/ResourcesPath");
                if (null != node)
                    config.ResourcesPath = node.InnerText.Trim();

                var list = doc.SelectNodes("Resources/FileList/File");
                if (null != list && 0 < list.Count)
                {
                    config.FileList = new List<ResourcesFile>();
                    foreach (XmlNode item in list)
                    {
                        var entity = new ResourcesFile();

                        node = item.SelectSingleNode("FileName");
                        if (null != node)
                            entity.FileName = node.InnerText.Trim();

                        node = item.SelectSingleNode("FileUrl");
                        if (null != node)
                            entity.FileUrl = node.InnerText.Trim();

                        node = item.SelectSingleNode("Version");
                        if (null != node)
                            entity.Version = TypeConverter.StrToInt(node.InnerText.Trim());

                        node = item.SelectSingleNode("IsLocal");
                        if (null != node)
                            entity.IsLocal = TypeConverter.StrToBool(node.InnerText.Trim(), false);

                        node = item.SelectSingleNode("FileType");
                        if (null != node)
                            entity.FileType = (ResourcesFileType)Enum.Parse(typeof(ResourcesFileType), node.InnerText.Trim(), true);

                        config.FileList.Add(entity);
                    }
                }
            }
            _config = config;
        }
        /// <summary>
        /// 重新加载资源配置
        /// </summary>
        public static void ResetLoadConfig(string configPath = "")
        {
            lock (lockObject)
            {
                var config = GetConfig();
                var newConfig = new ResourcesConfigInfo();
                if (null != config)
                    newConfig.ResourcesPath = config.ResourcesPath;
                if (!string.IsNullOrEmpty(configPath) && File.Exists(configPath))
                    newConfig.ResourcesPath = configPath;

                if (!string.IsNullOrEmpty(newConfig.ResourcesPath))
                {
                    var list = new List<ResourcesFile>();
                    string[] files = null;
                    string path = "";

                    #region 原有远端资源文件
                    if (null != config && null != config.FileList && 0 < config.FileList.Count)
                    {
                        foreach (var item in config.FileList)
                        {
                            if (!item.IsLocal)
                                list.Add(item);
                        }
                    }
                    #endregion

                    #region 本地JS资源文件
                    path = AppDomain.CurrentDomain.BaseDirectory + newConfig.ResourcesPath.Replace("/", "\\") + "js\\";
                    if (Directory.Exists(path))
                    {
                        files = Directory.GetFiles(path);
                        foreach (var item in files)
                        {
                            list.Add(new ResourcesFile()
                            {
                                FileName = System.IO.Path.GetFileName(item),
                                FileUrl = "",
                                Version = TypeConverter.StrToInt(File.GetLastWriteTime(item).ToString("yyyyMMddHH")),
                                IsLocal = true,
                                FileType = ResourcesFileType.JS
                            });
                        }
                    }
                    #endregion

                    #region 本地CSS资源
                    path = AppDomain.CurrentDomain.BaseDirectory + newConfig.ResourcesPath.Replace("/", "\\") + "css\\";
                    if (Directory.Exists(path))
                    {
                        files = Directory.GetFiles(path);
                        foreach (var item in files)
                        {
                            list.Add(new ResourcesFile()
                            {
                                FileName = System.IO.Path.GetFileName(item),
                                FileUrl = "",
                                Version = TypeConverter.StrToInt(File.GetLastWriteTime(item).ToString("yyyyMMddHH")),
                                IsLocal = true,
                                FileType = ResourcesFileType.CSS
                            });
                        }
                    }
                    #endregion

                    newConfig.FileList = list;
                    _config = newConfig;

                    SaveConfig(newConfig);
                }
            }
        }
        /// <summary>
        /// 保存配置文件
        /// </summary>
        /// <param name="config"></param>
        /// <returns></returns>
        public static bool SaveConfig(ResourcesConfigInfo config)
        {
            if (null == config)
                throw new ArgumentNullException("ResourcesConfigInfo 对象为空！");

            var sp = new StringBuilder(2000);
            sp.Append("<?xml version=\"1.0\" encoding=\"utf-8\" ?>\r\n");
            sp.Append("<Resources>\r\n");
            sp.Append("  <ResourcesPath>" + config.ResourcesPath + "</ResourcesPath>\r\n");
            sp.Append("  <FileList>\r\n");
            if (null != config.FileList && 0 < config.FileList.Count)
            {
                foreach (var item in config.FileList)
                {
                    sp.AppendFormat("    <File>\r\n      <FileName>{0}</FileName>\r\n      <FileUrl>{1}</FileUrl>\r\n      <Version>{2}</Version>\r\n      <IsLocal>{3}</IsLocal>\r\n      <FileType>{4}</FileType>\r\n    </File>\r\n",
                        item.FileName, item.FileUrl, item.Version, item.IsLocal, item.FileType);
                }
            }
            sp.Append("  </FileList>\r\n");
            sp.Append("</Resources>");
            using (StreamWriter writer = new StreamWriter(configPath, false, System.Text.Encoding.UTF8, sp.Length))
            {
                writer.Write(sp.ToString());
            }
            return true;
        }
        /// <summary>
        /// 返回配置
        /// </summary>
        /// <returns></returns>
        public static ResourcesConfigInfo GetConfig()
        {
            if (null == _config)
                LoadConfig();
            return _config;
        }
        /// <summary>
        /// 批量获取资源文件HTML代码
        /// </summary>
        /// <param name="files">文件名数组</param>
        /// <returns></returns>
        public static string GetMultiResourcesFilesHtml(string[] files)
        {
            if (null == files || 0 >= files.Length)
                return "";

            var config = GetConfig();
            if (null == config || null == config.FileList || 0 >= config.FileList.Count)
                return "";

            var sp = new StringBuilder(1000);
            for (int i = 0; i < files.Length; i++)
            {
                if (-1 == files[i].IndexOf('.'))
                    continue;

                ResourcesFileType fileType;
                foreach (var item in config.FileList)
                {
                    if (Enum.TryParse(System.IO.Path.GetExtension(files[i]).TrimStart('.'), true, out fileType))
                    {
                        if (item.FileName.ToLower() == files[i].ToLower() && item.FileType == fileType)
                        {
                            sp.AppendLine(item.GetFileHtml(config.ResourcesPath));
                        }
                    }
                }
            }
            return sp.ToString();
        }
        /// <summary>
        /// 批量获取资源文件HTML代码，多个文件请以","分隔
        /// </summary>
        /// <param name="files">资源文件以","分隔</param>
        /// <returns></returns>
        public static string GetMultiResourcesFilesHtml(string files)
        {
            if (string.IsNullOrWhiteSpace(files))
                return "";

            return GetMultiResourcesFilesHtml(files.Split(','));
        }
        /// <summary>
        /// 翻页列表
        /// </summary>
        /// <param name="pageSize"></param>
        /// <param name="pageIndex"></param>
        /// <param name="recordCount"></param>
        /// <returns></returns>
        public static IList<ResourcesFile> ToPaging(int pageSize, int pageIndex, out int recordCount)
        {
            recordCount = 0;

            var config = GetConfig();
            if (null == config || null == config.FileList || 0 >= config.FileList.Count)
                return null;

            recordCount = config.FileList.Count;
            int end = (pageIndex - 1) * pageSize + pageSize;
            int start = pageIndex == 1 ? 0 : (pageIndex - 1) * pageSize;
            if (start > recordCount)
                return null;
            end = end > recordCount ? recordCount : end;
            IList<ResourcesFile> list = new List<ResourcesFile>();
            for (int i = start; i < end; i++)
            {
                list.Add(config.FileList[i]);
            }
            return list;
        }
        /// <summary>
        /// 添加资源文件
        /// </summary>
        /// <param name="file"></param>
        /// <returns></returns>
        public static bool AddResourcesFiles(ResourcesFile file)
        {
            lock (lockObject)
            {
                var config = GetConfig();
                if (null == config || null == config.FileList || 0 >= config.FileList.Count)
                    return true;
                bool isContains = false;
                foreach (var item in config.FileList)
                {
                    if (item.FileUrl == file.FileUrl)
                        isContains = true;
                }
                if (!isContains)
                {
                    config.FileList.Add(file);
                    SaveConfig(config);
                    return true;
                }
                return false;
            }
        }
        /// <summary>
        /// 移除资源文件
        /// </summary>
        /// <param name="fileName"></param>
        /// <param name="fileType"></param>
        /// <returns></returns>
        public static bool RemoveResourcesFile(string fileName, ResourcesFileType fileType)
        {
            lock (lockObject)
            {
                var config = GetConfig();
                if (null == config || null == config.FileList || 0 >= config.FileList.Count)
                    return true;
                foreach (var item in config.FileList)
                {
                    if (fileName == item.FileName && fileType == item.FileType)
                    {
                        config.FileList.Remove(item);
                        SaveConfig(config);
                        return true;
                    }
                }
                return false;
            }
        }
        /// <summary>
        /// 更新文件版本号
        /// </summary>
        /// <param name="fileName">文件名</param>
        /// <param name="fileType">文件类型</param>
        /// <param name="saveFile">是否保存文件</param>
        /// <returns></returns>
        public static bool UpdateFileVersion(string fileName, ResourcesFileType fileType, bool saveFile = true)
        {
            var config = GetConfig();
            if (null == config || null == config.FileList || 0 >= config.FileList.Count)
                return true;
            foreach (var item in config.FileList)
            {
                if (item.IsLocal && fileName == item.FileName && fileType == item.FileType)
                {
                    string filePath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory,
                        string.Format("{0}{1}\\{2}", config.ResourcesPath.Replace("/", "\\"), item.FileType.ToString(), item.FileName));
                    if (File.Exists(filePath))
                        item.Version = TypeConverter.StrToInt(File.GetLastWriteTime(filePath).ToString("yyyyMMddHH"));
                    if (saveFile)
                        SaveConfig(config);
                    return true;
                }
            }
            return false;
        }
        /// <summary>
        /// 更新所有文件版本号
        /// </summary>
        /// <param name="fileName"></param>
        /// <param name="fileType"></param>
        /// <returns></returns>
        public static bool UpdateAllFileVersion()
        {
            var config = GetConfig();
            if (null == config || null == config.FileList || 0 >= config.FileList.Count)
                return true;
            foreach (var item in config.FileList)
            {
                if (item.IsLocal)
                {
                    string filePath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory,
                        string.Format("{0}{1}\\{2}", config.ResourcesPath.Replace("/", "\\"), item.FileType.ToString(), item.FileName));
                    if (File.Exists(filePath))
                        item.Version = TypeConverter.StrToInt(File.GetLastWriteTime(filePath).ToString("yyyyMMddHH"));
                }
            }
            return SaveConfig(config);
        }


    }

    /// <summary>
    /// 资源配置文件   By:JNswins
    /// </summary>
    public class ResourcesConfigInfo
    {
        /// <summary>
        /// 资源文件路劲
        /// </summary>
        public string ResourcesPath { get; set; }
        /// <summary>
        /// 资源文件
        /// </summary>
        public IList<ResourcesFile> FileList { get; set; }
    }

    /// <summary>
    /// 资源文件
    /// </summary>
    public class ResourcesFile
    {
        /// <summary>
        /// 文件名称
        /// </summary>
        public string FileName { get; set; }
        /// <summary>
        /// 文件地址
        /// </summary>
        public string FileUrl { get; set; }
        /// <summary>
        /// 版本
        /// </summary>
        public int Version { get; set; }
        /// <summary>
        /// 是否本地资源文件
        /// </summary>
        public bool IsLocal { get; set; }
        /// <summary>
        /// 资源文件类型
        /// </summary>
        public ResourcesFileType FileType { get; set; }
        /// <summary>
        /// 返回文件地址
        /// </summary>
        /// <param name="path">资源文件配置路径</param>
        /// <returns></returns>
        public string GetFileUrl(string path)
        {
            if (!IsLocal)
                return FileUrl;

            return string.Format("{0}{1}/{2}?v={3}", path, this.FileType.ToString().ToLower(), this.FileName.ToLower(), this.Version);
        }

        /// <summary>
        /// 返回HTML代码
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public string GetFileHtml(string path)
        {
            switch (this.FileType)
            {
                case ResourcesFileType.CSS:
                    return string.Format("<link type=\"text/css\" href=\"{0}\" rel=\"stylesheet\"/>", GetFileUrl(path));
                case ResourcesFileType.JS:
                    return string.Format("<script type=\"text/javascript\" src=\"{0}\"></script>", GetFileUrl(path));
            }
            return "";
        }
    }

    /// <summary>
    /// 资源文件类型
    /// </summary>
    public enum ResourcesFileType
    {
        CSS = 1,
        JS = 2,
        IMG = 3
    }
}