using System;
using System.Xml;

namespace Server.Accounting
{
  public class AccountComment
  {
    private string m_Content;

    /// <summary>
    ///   Constructs a new AccountComment instance.
    /// </summary>
    /// <param name="addedBy">Initial AddedBy value.</param>
    /// <param name="content">Initial Content value.</param>
    public AccountComment(string addedBy, string content)
    {
      AddedBy = addedBy;
      m_Content = content;
      LastModified = DateTime.UtcNow;
    }

    /// <summary>
    ///   Deserializes an AccountComment instance from an xml element.
    /// </summary>
    /// <param name="node">The XmlElement instance from which to deserialize.</param>
    public AccountComment(XmlElement node)
    {
      AddedBy = Utility.GetAttribute(node, "addedBy", "empty");
      LastModified = Utility.GetXMLDateTime(Utility.GetAttribute(node, "lastModified"), DateTime.UtcNow);
      m_Content = Utility.GetText(node, "");
    }

    /// <summary>
    ///   A string representing who added this comment.
    /// </summary>
    public string AddedBy { get; }

    /// <summary>
    ///   Gets or sets the body of this comment. Setting this value will reset LastModified.
    /// </summary>
    public string Content
    {
      get => m_Content;
      set
      {
        m_Content = value;
        LastModified = DateTime.UtcNow;
      }
    }

    /// <summary>
    ///   The date and time when this account was last modified -or- the comment creation time, if never modified.
    /// </summary>
    public DateTime LastModified { get; private set; }

    /// <summary>
    ///   Serializes this AccountComment instance to an XmlTextWriter.
    /// </summary>
    /// <param name="xml">The XmlTextWriter instance from which to serialize.</param>
    public void Save(XmlTextWriter xml)
    {
      xml.WriteStartElement("comment");

      xml.WriteAttributeString("addedBy", AddedBy);

      xml.WriteAttributeString("lastModified", XmlConvert.ToString(LastModified, XmlDateTimeSerializationMode.Utc));

      xml.WriteString(m_Content);

      xml.WriteEndElement();
    }
  }
}