//
// System.Xml.Serialization.XmlSerializationWriter.cs
//
// Author:
//   Tim Coleman (tim@timcoleman.com)
//
// Copyright (C) Tim Coleman, 2002
//

using System;
using System.Collections;
using System.Text;
using System.Xml;
using System.Xml.Schema;

namespace System.Xml.Serialization {
	public abstract class XmlSerializationWriter {

		#region Fields

		Hashtable references;
		int referenceCount;
		int qnameCount;

		ArrayList namespaces;
		XmlWriter writer;

		#endregion // Fields

		#region Constructors

		[MonoTODO]
		protected XmlSerializationWriter ()
		{
			qnameCount = 0;
			references = new Hashtable ();
			referenceCount = 0;
		}

		#endregion // Constructors

		#region Properties

		protected ArrayList Namespaces {
			get { return namespaces; }
			set { namespaces = value; }
		}

		protected XmlWriter Writer {
			get { return writer; }
			set { writer = value; }
		}

		#endregion // Properties

		#region Methods

		[MonoTODO ("Implement")]
		protected void AddWriteCallback (Type type, string typeName, string typeNs, XmlSerializationWriteCallback callback)
		{
			throw new NotImplementedException ();
		}

		protected Exception CreateMismatchChoiceException (string value, string elementName, string enumValue)
		{
			string message = String.Format ("Value of {0} mismatches the type of {1}, you need to set it to {2}.", elementName, value, enumValue);
			return new InvalidOperationException (message);
		}

		protected Exception CreateUnknownAnyElementException (string name, string ns)
		{
			string message = String.Format ("The XML element named '{0}' from namespace '{1}' was not expected. The XML element name and namespace must match those provided via XmlAnyElementAttribute(s).", name, ns);
			return new InvalidOperationException (message);
		}

		protected Exception CreateUnknownTypeException (object o)
		{
			return CreateUnknownTypeException (o.GetType ());
		}

		protected Exception CreateUnknownTypeException (Type type)
		{
			string message = String.Format ("The type {0} may not be used in this context.", type);
			return new InvalidOperationException (message);
		}

		protected static byte[] FromByteArrayBase64 (byte[] value)
		{
			return XmlCustomFormatter.FromByteArrayBase64 (value);
		}

		protected static string FromByteArrayHex (byte[] value)
		{
			return XmlCustomFormatter.FromByteArrayHex (value);
		}

		protected static string FromChar (char value)
		{
			return XmlCustomFormatter.FromChar (value);
		}

		protected static string FromDate (DateTime value)
		{
			return XmlCustomFormatter.FromDate (value);
		}

		protected static string FromDateTime (DateTime value)
		{
			return XmlCustomFormatter.FromDateTime (value);
		}

		protected static string FromEnum (long value, string[] values, long[] ids)
		{
			return XmlCustomFormatter.FromEnum (value, values, ids);
		}

		protected static string FromTime (DateTime value)
		{
			return XmlCustomFormatter.FromTime (value);
		}

		protected static string FromXmlName (string name)
		{
			return XmlCustomFormatter.FromXmlName (name);
		}

		protected static string FromXmlNCName (string ncName)
		{
			return XmlCustomFormatter.FromXmlNCName (ncName);
		}

		protected static string FromXmlNmToken (string nmToken)
		{
			return XmlCustomFormatter.FromXmlNmToken (nmToken);
		}

		protected static string FromXmlNmTokens (string nmTokens)
		{
			return XmlCustomFormatter.FromXmlNmTokens (nmTokens);
		}

		[MonoTODO ("Implement")]
		protected string FromXmlQualifiedName (XmlQualifiedName xmlQualifiedName)
		{
			return GetQualifiedName (xmlQualifiedName.Name, xmlQualifiedName.Namespace);
		}

		private string GetId (object o, bool addToReferencesList)
		{
			referenceCount += 1;
			string id = String.Format ("id{0}", referenceCount);
			if (addToReferencesList)
				references[o] = id;
			return id;
		}

		[MonoTODO ("Complete this list.")]
		private string GetPrimitiveTypeName (Type type)
		{
			if (type == typeof (string))
				return "string";
			if (type == typeof (bool))
				return "Boolean";
			if (type == typeof (float))
				return "float";
			if (type == typeof (double))
				return "double";
			if (type == typeof (XmlQualifiedName))
				return "QName";

			return String.Empty;
		}
	
		[MonoTODO ("Need to check for namespace conflicts before blindly allocating qN")]
		private string GetQualifiedName (string name, string ns)
		{
			qnameCount += 1;
			string prefix = String.Format ("q{0}", qnameCount);

			WriteAttribute ("xmlns", prefix, null, ns);
			return String.Format ("{0}:{1}", prefix, name);
		}

		protected abstract void InitCallbacks ();

		[MonoTODO ("Implement")]
		protected void TopLevelElement ()
		{
			throw new NotImplementedException ();
		}

		protected void WriteAttribute (string localName, byte[] value)
		{
			WriteAttribute (localName, String.Empty, value);
		}

		protected void WriteAttribute (string localName, string value)
		{
			WriteAttribute (String.Empty, localName, String.Empty, value);
		}

		protected void WriteAttribute (string localName, string ns, byte[] value)
		{
			Writer.WriteStartAttribute (localName, ns);
			WriteValue (value);
			Writer.WriteEndAttribute ();
		}

		protected void WriteAttribute (string localName, string ns, string value)
		{
			WriteAttribute (String.Empty, localName, ns, value);
		}

		protected void WriteAttribute (string prefix, string localName, string ns, string value)
		{
			Writer.WriteStartAttribute (prefix, localName, ns);
			WriteValue (value);
			Writer.WriteEndAttribute ();
		}

		[MonoTODO ("Implement")]
		protected void WriteElementEncoded (XmlNode node, string name, string ns, bool isNullable, bool any)
		{
			throw new NotImplementedException ();
		}

		[MonoTODO ("Implement")]
		protected void WriteElementLiteral (XmlNode node, string name, string ns, bool isNullable, bool any)
		{
			WriteStartElement (name, ns);
			node.WriteTo (Writer);
			WriteEndElement ();
		}

		protected void WriteElementQualifiedName (string localName, XmlQualifiedName value)
		{
			WriteElementQualifiedName (localName, String.Empty, value, null);
		}

		protected void WriteElementQualifiedName (string localName, string ns, XmlQualifiedName value)
		{
			WriteElementQualifiedName (localName, ns, value, null);
		}

		protected void WriteElementQualifiedName (string localName, XmlQualifiedName value, XmlQualifiedName xsiType)
		{
			WriteElementQualifiedName (localName, String.Empty, value, xsiType);
		}

		protected void WriteElementQualifiedName (string localName, string ns, XmlQualifiedName value, XmlQualifiedName xsiType)
		{
			WriteStartElement (localName, ns);
			Writer.WriteString (FromXmlQualifiedName (value));
			WriteEndElement ();
		}

		protected void WriteElementString (string localName, string value)
		{
			WriteElementString (localName, String.Empty, value, null);
		}

		protected void WriteElementString (string localName, string ns, string value)
		{
			WriteElementString (localName, ns, value, null);
		}

		protected void WriteElementString (string localName, string value, XmlQualifiedName xsiType)
		{
			WriteElementString (localName, String.Empty, value, xsiType);
		}

		[MonoTODO ("Implement")]
		protected void WriteElementString (string localName, string ns, string value, XmlQualifiedName xsiType)
		{
			if (xsiType != null) {
				WriteStartElement (localName, ns);
				WriteXsiType (xsiType.Name, xsiType.Namespace);
				Writer.WriteString (value);
				WriteEndElement ();
			} 
			else
				Writer.WriteElementString (localName, ns, value);
		}

		protected void WriteElementStringRaw (string localName, byte[] value)
		{
			WriteElementStringRaw (localName, String.Empty, value, null);
		}

		protected void WriteElementStringRaw (string localName, string value)
		{
			WriteElementStringRaw (localName, String.Empty, value, null);
		}

		protected void WriteElementStringRaw (string localName, byte[] value, XmlQualifiedName xsiType)
		{
			WriteElementStringRaw (localName, String.Empty, value, xsiType);
		}

		protected void WriteElementStringRaw (string localName, string ns, byte[] value)
		{
			WriteElementStringRaw (localName, ns, value, null);
		}

		protected void WriteElementStringRaw (string localName, string ns, string value)
		{
			WriteElementStringRaw (localName, ns, value, null);
		}

		protected void WriteElementStringRaw (string localName, string value, XmlQualifiedName xsiType)
		{
			WriteElementStringRaw (localName, String.Empty, value, null);
		}

		[MonoTODO ("Implement")]
		protected void WriteElementStringRaw (string localName, string ns, byte[] value, XmlQualifiedName xsiType)
		{
			throw new NotImplementedException ();
		}

		[MonoTODO ("Implement")]
		protected void WriteElementStringRaw (string localName, string ns, string value, XmlQualifiedName xsiType)
		{
			WriteStartElement (localName, ns);

			if (xsiType != null)
				WriteXsiType (xsiType.Name, xsiType.Namespace);

			Writer.WriteRaw (value);
			WriteEndElement ();
		}

		protected void WriteEmptyTag (string name)
		{
			WriteEmptyTag (name, String.Empty);
		}

		[MonoTODO ("Verify")]
		protected void WriteEmptyTag (string name, string ns)
		{
			Writer.WriteStartElement (name, ns);
			Writer.WriteEndElement ();
		}

		protected void WriteEndElement ()
		{
			WriteEndElement (null);
		}

		[MonoTODO ("Implement")]
		protected void WriteEndElement (object o)
		{
			Writer.WriteEndElement ();
		}

		protected void WriteId (object o)
		{
			WriteAttribute ("id", GetId (o, true));
		}

		protected void WriteNamespaceDeclarations (XmlSerializerNamespaces ns)
		{
			if (ns == null)
				return;

			Hashtable tbl = ns.Namespaces;
			foreach (string key in tbl.Keys) {
				string val = tbl [key] as string;
				if (val == null)
					val = String.Empty;
				WriteAttribute ("xmlns", key, null, val);
			}
		}

		[MonoTODO ("Implement")]
		protected void WriteNullableQualifiedNameEncoded (string name, string ns, XmlQualifiedName value, XmlQualifiedName xsiType)
		{
			throw new NotImplementedException ();
		}

		[MonoTODO ("Implement")]
		protected void WriteNullableQualifiedNameLiteral (string name, string ns, XmlQualifiedName value)
		{
			throw new NotImplementedException ();
		}

		[MonoTODO ("Implement")]
		protected void WriteNullableStringEncoded (string name, string ns, string value, XmlQualifiedName xsiType)
		{
			throw new NotImplementedException ();
		}

		[MonoTODO ("Implement")]
		protected void WriteNullableStringEncodedRaw (string name, string ns, byte[] value, XmlQualifiedName xsiType)
		{
			throw new NotImplementedException ();
		}

		[MonoTODO ("Implement")]
		protected void WriteNullableStringEncodedRaw (string name, string ns, string value, XmlQualifiedName xsiType)
		{
			throw new NotImplementedException ();
		}

		[MonoTODO ("Implement")]
		protected void WriteNullableStringLiteral (string name, string ns, string value)
		{
			throw new NotImplementedException ();
		}

		[MonoTODO ("Implement")]
		protected void WriteNullableStringLiteralRaw (string name, string ns, byte[] value)
		{
			throw new NotImplementedException ();
		}

		[MonoTODO ("Implement")]
		protected void WriteNullableStringLiteralRaw (string name, string ns, string value)
		{
			throw new NotImplementedException ();
		}

		protected void WriteNullTagEncoded (string name)
		{
			WriteNullTagEncoded (name, String.Empty);
		}

		[MonoTODO ("Implement")]
		protected void WriteNullTagEncoded (string name, string ns)
		{
			throw new NotImplementedException ();
		}

		protected void WriteNullTagLiteral (string name)
		{
			WriteNullTagLiteral (name, String.Empty);
		}

		[MonoTODO ("Implement")]
		protected void WriteNullTagLiteral (string name, string ns)
		{
			throw new NotImplementedException ();
		}

		protected void WritePotentiallyReferencingElement (string n, string ns, object o)
		{
			WritePotentiallyReferencingElement (n, ns, o, null, false, false);
		}

		protected void WritePotentiallyReferencingElement (string n, string ns, object o, Type ambientType)
		{
			WritePotentiallyReferencingElement (n, ns, o, ambientType, false, false);
		}

		protected void WritePotentiallyReferencingElement (string n, string ns, object o, Type ambientType, bool suppressReference)
		{
			WritePotentiallyReferencingElement (n, ns, o, ambientType, suppressReference, false);
		}

		[MonoTODO ("Implement")]
		protected void WritePotentiallyReferencingElement (string n, string ns, object o, Type ambientType, bool suppressReference, bool isNullable)
		{
			throw new NotImplementedException ();
		}

		[MonoTODO ("Implement")]
		protected void WriteReferencedElements ()
		{
			throw new NotImplementedException ();
		}

		protected void WriteReferencingElement (string n, string ns, object o)
		{
			WriteReferencingElement (n, ns, o, false);
		}

		[MonoTODO ("Implement")]
		protected void WriteReferencingElement (string n, string ns, object o, bool isNullable)
		{
			throw new NotImplementedException ();
		}

		[MonoTODO ("Implement")]
		protected void WriteSerializable (IXmlSerializable serializable, string name, string ns, bool isNullable)
		{
			throw new NotImplementedException ();
		}

		protected void WriteStartDocument ()
		{
			Writer.WriteStartDocument ();
		}

		protected void WriteStartElement (string name)
		{
			WriteStartElement (name, String.Empty, null, false);
		}

		protected void WriteStartElement (string name, string ns)
		{
			WriteStartElement (name, ns, null, false);
		}

		protected void WriteStartElement (string name, string ns, bool writePrefixed)
		{
			WriteStartElement (name, ns, null, writePrefixed);
		}

		protected void WriteStartElement (string name, string ns, object o)
		{
			WriteStartElement (name, ns, o, false);
		}

		[MonoTODO]
		protected void WriteStartElement (string name, string ns, object o, bool writePrefixed)
		{
			if (writePrefixed)
				Writer.WriteStartElement (String.Empty, name, ns);
			else
				Writer.WriteStartElement (name, ns);
		}

		protected void WriteTypedPrimitive (string name, string ns, object o, bool xsiType)
		{
			string value;

			WriteStartElement (name, ns);

			if (o is XmlQualifiedName)
				value = FromXmlQualifiedName ((XmlQualifiedName) o);
			else
				value = o.ToString ();

			if (xsiType)
				WriteXsiType (GetPrimitiveTypeName (o.GetType ()), XmlSchema.Namespace);

			WriteValue (value);
			WriteEndElement ();
		}

		protected void WriteValue (byte[] value)
		{
			Writer.WriteBase64 (value, 0, value.Length);
		}

		protected void WriteValue (string value)
		{
			Writer.WriteString (value);
		}

		protected void WriteXmlAttribute (XmlNode node)
		{
			WriteXmlAttribute (node, null);
		}

		[MonoTODO ("Implement")]
		protected void WriteXmlAttribute (XmlNode node, object container)
		{
			if (!(node is XmlAttribute))
				throw new InvalidOperationException ("The node must be either type XmlAttribute or a derived type.");
			throw new NotImplementedException ();
		}

		protected void WriteXsiType (string name, string ns)
		{
			WriteAttribute ("type", XmlSchema.InstanceNamespace, GetQualifiedName (name, ns));
		}
		
		#endregion
	}
}