using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Xml;
using System.Xml.Serialization;

namespace XYY.Common.Standard
{
    public static class XmlHelper
    {
        private static void XmlSerializeInternal(Stream stream, object o, Encoding encoding)
        {
            if (o == null)
                throw new ArgumentNullException("o");
            if (encoding == null)
                throw new ArgumentNullException("encoding");

            XmlSerializer serializer = new XmlSerializer(o.GetType());

            XmlWriterSettings settings = new XmlWriterSettings();
            settings.Indent = true;
            settings.NewLineChars = "\r\n";
            settings.Encoding = encoding;
            settings.IndentChars = "    ";

            using (XmlWriter writer = XmlWriter.Create(stream, settings))
            {
                serializer.Serialize(writer, o);
                writer.Close();
            }
        }
        //
        /// <summary>
        /// 将一个对象序列化为XML字符串
        /// </summary>
        /// <param name="o">要序列化的对象</param>
        /// <param name="encoding">编码方式</param>
        /// <returns>序列化产生的XML字符串</returns>
        public static string XmlSerialize(object o, Encoding encoding)
        {
            using (MemoryStream stream = new MemoryStream())
            {
                XmlSerializeInternal(stream, o, encoding);

                stream.Position = 0;
                using (StreamReader reader = new StreamReader(stream, encoding))
                {
                    return reader.ReadToEnd();
                }
            }
        }

        /// <summary>
        /// 将一个对象按XML序列化的方式写入到一个文件
        /// </summary>
        /// <param name="o">要序列化的对象</param>
        /// <param name="path">保存文件路径</param>
        /// <param name="encoding">编码方式</param>
        public static void XmlSerializeToFile(object o, string path, Encoding encoding)
        {
            if (string.IsNullOrEmpty(path))
                throw new ArgumentNullException("path");

            using (FileStream file = new FileStream(path, FileMode.Create, FileAccess.Write))
            {
                XmlSerializeInternal(file, o, encoding);
            }
        }

        /// <summary>
        /// 从XML字符串中反序列化对象
        /// </summary>
        /// <typeparam name="T">结果对象类型</typeparam>
        /// <param name="s">包含对象的XML字符串</param>
        /// <param name="encoding">编码方式</param>
        /// <returns>反序列化得到的对象</returns>
        public static T XmlDeserialize<T>(string s, Encoding encoding)
        {
            if (string.IsNullOrEmpty(s))
                throw new ArgumentNullException("s");
            if (encoding == null)
                throw new ArgumentNullException("encoding");
            XmlSerializer mySerializer = new XmlSerializer(typeof(T));
            using (MemoryStream ms = new MemoryStream(encoding.GetBytes(s)))
            {
                using (StreamReader sr = new StreamReader(ms, encoding))
                {
                    return (T)mySerializer.Deserialize(sr);
                }
            }
        }


        /// <summary>
        /// 读入一个文件，并按XML的方式反序列化对象。
        /// </summary>
        /// <typeparam name="T">结果对象类型</typeparam>
        /// <param name="path">文件路径</param>
        /// <param name="encoding">编码方式</param>
        /// <returns>反序列化得到的对象</returns>
        public static T XmlDeserializeFromFile<T>(string path, Encoding encoding)
        {
            if (string.IsNullOrEmpty(path))
                throw new ArgumentNullException("path");
            if (encoding == null)
                throw new ArgumentNullException("encoding");
            if (!File.Exists(path))
                throw new FileNotFoundException(path);
            string xml = File.ReadAllText(path, encoding);
            return XmlDeserialize<T>(xml, encoding);
        }
    }

    public class RegexHelper
    {
        public static bool IsMatch(string input, string pattern)
        {
            return Regex.IsMatch(input, pattern, RegexOptions.Compiled);
        }

        public static List<List<string>> Matches(string input, string pattern)
        {
            return Matches(input, pattern, RegexOptions.Compiled | RegexOptions.Singleline);
        }


        public static List<List<string>> Matches(string input, string pattern, RegexOptions options)
        {
            if (Regex.IsMatch(input, pattern, options))
            {
                List<List<string>> list = new List<List<string>>();
                foreach (Match m in Regex.Matches(input, pattern, options))
                {
                    if (m.Success)
                    {
                        List<string> liststr = new List<string>();
                        foreach (Group g in m.Groups)
                        {
                            if (g.Success)
                            {
                                liststr.Add(g.Value);
                            }
                        }
                        list.Add(liststr);
                    }
                }
                return list;
            }
            return null;
        }
        public static List<string> Match(string input, string pattern, RegexOptions options)
        {
            if (Regex.IsMatch(input, pattern, options))
            {
                List<string> liststr = new List<string>();
                Match m = Regex.Match(input, pattern, options);
                if (m.Success)
                {
                    foreach (Group g in m.Groups)
                    {
                        if (g.Success)
                        {
                            liststr.Add(g.Value);
                        }
                    }
                }
                return liststr;
            }
            return null;
        }
    }
}
