using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;
using System.Xml;
using System.Net.Sockets;
using XYLEM.Base.Files;

namespace XYLEM.Base.XML
{    
    internal class XMLWriteFuncClass
    {                
        /// <summary>
        /// Writes the given object instance to an XML file.
        /// <para>Only Public properties and variables will be written to the file. These can be any type though, even other classes.</para>
        /// <para>If there are public properties/variables that you do not want written to the file, decorate them with the [XmlIgnore] attribute.</para>
        /// <para>Object type must have a parameterless constructor.</para>
        /// </summary>
        /// <typeparam name="T">The type of object being written to the file.</typeparam>
        /// <param name="filePath">The file path to write the object instance to.</param>
        /// <param name="objectToWrite">The object instance to write to the file.</param>
        /// <param name="append">If false the file will be overwritten if it already exists. If true the contents will be appended to the file.</param>
        public static void WriteToXmlFile<T>(string filePath, T objectToWrite, bool append = false) where T : new()
        {
            // from https://stackoverflow.com/questions/6115721/how-to-save-restore-serializable-object-to-from-file
            TextWriter writer = null;
            try
            {
                writer = new StreamWriter(filePath, append);
                XmlSerializer xmlSerializer = new XmlSerializer(typeof(T));
                xmlSerializer.Serialize(writer, objectToWrite);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.ToFuncErrorText(typeof(XMLWriteFuncClass).ToString(), ProgramLogCSVFileClass.GetCurrentStaticMethod()));
            }
            finally
            {
                if (writer != null)
                    writer.Close();
            }
        }

        /// <summary>
        /// Reads an object instance from an XML file.
        /// <para>Object type must have a parameterless constructor.</para>
        /// </summary>
        /// <typeparam name="T">The type of object to read from the file.</typeparam>
        /// <param name="filePath">The file path to read the object instance from.</param>
        /// <returns>Returns a new instance of the object read from the XML file.</returns>
        public static T ReadFromXmlFile<T>(string filePath) where T : new()
        {
            // from https://stackoverflow.com/questions/6115721/how-to-save-restore-serializable-object-to-from-file

            TextReader reader = null;
            try
            {
                XmlSerializer xmlSerializer = new XmlSerializer(typeof(T));
                reader = new StreamReader(filePath);
                return (T)xmlSerializer.Deserialize(reader);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.ToFuncErrorText(typeof(XMLWriteFuncClass).ToString(), ProgramLogCSVFileClass.GetCurrentStaticMethod()));
            }
            finally
            {
                if (reader != null)
                    reader.Close();
            }
        }
    }
}