using System;
using System.Collections;
using System.Collections.Specialized;
using System.Xml;
using System.Xml.Schema;
using System.Xml.Serialization;
using AmerEx.Shared.Test;
using NUnit.Framework;

/// <summary>
/// Dictionary used specifically for passing DevExperience Cache messages over the WebServices
/// </summary>
[Serializable]
public class TableAgeDictionary : IXmlSerializable
{
	private readonly IDictionary dictionary;

	public TableAgeDictionary()
	{
		dictionary = new HybridDictionary();
	}

	public TableAgeDictionary(IDictionary dictionary)
	{
		this.dictionary = dictionary;
	}

	public IDictionary Dictionary
	{
		get { return dictionary; }
	}

	#region IXmlSerializable Members

	XmlSchema IXmlSerializable.GetSchema()
	{
		return null;
	}

	void IXmlSerializable.ReadXml(XmlReader reader)
	{
		reader.Read();
		reader.ReadStartElement("dictionary");
		if (reader.NodeType != XmlNodeType.EndElement)
		{
			while (reader.NodeType != XmlNodeType.EndElement)
			{
				reader.ReadStartElement("item");
				string key = reader.ReadElementString("key");
				long value = long.Parse(reader.ReadElementString("value"));
				reader.ReadEndElement();
				dictionary.Add(key, value);
			}
			reader.ReadEndElement();
		}
		reader.ReadEndElement();
	}

	void IXmlSerializable.WriteXml(XmlWriter writer)
	{
		writer.WriteStartElement("dictionary");
		if (dictionary != null)
		{
			foreach (object key in dictionary.Keys)
			{
				object value = dictionary[key];
				writer.WriteStartElement("item");
				writer.WriteElementString("key", key.ToString());
				writer.WriteElementString("value", value.ToString());
				writer.WriteEndElement();
			}
		}
		writer.WriteEndElement();
	}

	#endregion
}

[TestFixture]
public class TableAgeDictionaryFixture
{
	private static TableAgeDictionary RunTrip(TableAgeDictionary dictionary)
	{
		string xmlString = XmlUtil<TableAgeDictionary>.Encode(dictionary);
		TableAgeDictionary passedDictionary = XmlUtil<TableAgeDictionary>.Decode(xmlString);
		Assert.AreEqual(dictionary.Dictionary.Count, passedDictionary.Dictionary.Count);
		Assert.AreEqual(xmlString, XmlUtil<TableAgeDictionary>.Encode(passedDictionary));
		return passedDictionary;
	}

	[Test]
	public void SimpleEmptyRoundTripTest()
	{
		TableAgeDictionary trip = RunTrip(new TableAgeDictionary());
		Assert.AreEqual(0, trip.Dictionary.Count);
	}

	[Test]
	public void SimpleFullRoundTripTest()
	{
		TableAgeDictionary source = new TableAgeDictionary();
		source.Dictionary.Add("key", 1);
		source.Dictionary.Add("key2", 2);
		TableAgeDictionary decode = RunTrip(source);
		Assert.AreEqual(2, decode.Dictionary.Count);
		Assert.AreEqual(1, decode.Dictionary["key"]);
		Assert.AreEqual(2, decode.Dictionary["key2"]);
	}
}