using System;

using System.IO;

using System.Collections.Generic;

using Google.ProtocolBuffers.Collections;



namespace Google.ProtocolBuffers.Serialization.Http

{

    /// <summary>

    /// Defines control information for the various formatting used with HTTP services

    /// </summary>

    public class MessageFormatOptions

    {

        /// <summary>The mime type for xml content</summary>

        /// <remarks>Other valid xml mime types include: application/binary, application/x-protobuf</remarks>

        public const string ContentTypeProtoBuffer = "application/vnd.google.protobuf";



        /// <summary>The mime type for xml content</summary>

        /// <remarks>Other valid xml mime types include: text/xml</remarks>

        public const string ContentTypeXml = "application/xml";

        

        /// <summary>The mime type for json content</summary>

        /// <remarks>

        /// Other valid json mime types include: application/json, application/x-json, 

        /// application/x-javascript, text/javascript, text/x-javascript, text/x-json, text/json

        /// </remarks>

        public const string ContentTypeJson = "application/json";



        /// <summary>The mime type for query strings and x-www-form-urlencoded content</summary>

        /// <remarks>This mime type is input-only</remarks>

        public const string ContentFormUrlEncoded = "application/x-www-form-urlencoded";



        /// <summary>

        /// Default mime-type handling for input

        /// </summary>

        private static readonly IDictionary<string, Converter<Stream, ICodedInputStream>> MimeInputDefaults =

            new ReadOnlyDictionary<string, Converter<Stream, ICodedInputStream>>(

            new Dictionary<string, Converter<Stream, ICodedInputStream>>(StringComparer.OrdinalIgnoreCase)

                {

                    {"application/json", JsonFormatReader.CreateInstance},

                    {"application/x-json", JsonFormatReader.CreateInstance},

                    {"application/x-javascript", JsonFormatReader.CreateInstance},

                    {"text/javascript", JsonFormatReader.CreateInstance},

                    {"text/x-javascript", JsonFormatReader.CreateInstance},

                    {"text/x-json", JsonFormatReader.CreateInstance},

                    {"text/json", JsonFormatReader.CreateInstance},

                    {"text/xml", XmlFormatReader.CreateInstance},

                    {"application/xml", XmlFormatReader.CreateInstance},

                    {"application/binary", CodedInputStream.CreateInstance},

                    {"application/x-protobuf", CodedInputStream.CreateInstance},

                    {"application/vnd.google.protobuf", CodedInputStream.CreateInstance},

                    {"application/x-www-form-urlencoded", FormUrlEncodedReader.CreateInstance},

                }

            );



        /// <summary>

        /// Default mime-type handling for output

        /// </summary>

        private static readonly IDictionary<string, Converter<Stream, ICodedOutputStream>> MimeOutputDefaults =

            new ReadOnlyDictionary<string, Converter<Stream, ICodedOutputStream>>(

            new Dictionary<string, Converter<Stream, ICodedOutputStream>>(StringComparer.OrdinalIgnoreCase)

                {

                    {"application/json", JsonFormatWriter.CreateInstance},

                    {"application/x-json", JsonFormatWriter.CreateInstance},

                    {"application/x-javascript", JsonFormatWriter.CreateInstance},

                    {"text/javascript", JsonFormatWriter.CreateInstance},

                    {"text/x-javascript", JsonFormatWriter.CreateInstance},

                    {"text/x-json", JsonFormatWriter.CreateInstance},

                    {"text/json", JsonFormatWriter.CreateInstance},

                    {"text/xml", XmlFormatWriter.CreateInstance},

                    {"application/xml", XmlFormatWriter.CreateInstance},

                    {"application/binary", CodedOutputStream.CreateInstance},

                    {"application/x-protobuf", CodedOutputStream.CreateInstance},

                    {"application/vnd.google.protobuf", CodedOutputStream.CreateInstance},

                }

            );









        private string _defaultContentType;

        private string _xmlReaderRootElementName;

        private string _xmlWriterRootElementName;

        private ExtensionRegistry _extensionRegistry;

        private Dictionary<string, Converter<Stream, ICodedInputStream>> _mimeInputTypes;

        private Dictionary<string, Converter<Stream, ICodedOutputStream>> _mimeOutputTypes;



        /// <summary> Provides access to modify the mime-type input stream construction </summary>

        public IDictionary<string, Converter<Stream, ICodedInputStream>> MimeInputTypes

        {

            get

            {

                return _mimeInputTypes ??

                    (_mimeInputTypes = new Dictionary<string, Converter<Stream, ICodedInputStream>>(

                                           MimeInputDefaults, StringComparer.OrdinalIgnoreCase));

            }

        }



        /// <summary> Provides access to modify the mime-type input stream construction </summary>

        public IDictionary<string, Converter<Stream, ICodedOutputStream>> MimeOutputTypes

        {

            get

            {

                return _mimeOutputTypes ??

                    (_mimeOutputTypes = new Dictionary<string, Converter<Stream, ICodedOutputStream>>(

                                           MimeOutputDefaults, StringComparer.OrdinalIgnoreCase));

            }

        }



        internal IDictionary<string, Converter<Stream, ICodedInputStream>> MimeInputTypesReadOnly

        { get { return _mimeInputTypes ?? MimeInputDefaults; } }



        internal IDictionary<string, Converter<Stream, ICodedOutputStream>> MimeOutputTypesReadOnly

        { get { return _mimeOutputTypes ?? MimeOutputDefaults; } }



        /// <summary>

        /// The default content type to use if the input type is null or empty.  If this

        /// value is not supplied an ArgumentOutOfRangeException exception will be raised.

        /// </summary>

        public string DefaultContentType

        {

            get { return _defaultContentType ?? String.Empty; }

            set { _defaultContentType = value; }

        }



        /// <summary>

        /// The extension registry to use when reading messages

        /// </summary>

        public ExtensionRegistry ExtensionRegistry

        {

            get { return _extensionRegistry ?? ExtensionRegistry.Empty; }

            set { _extensionRegistry = value; }

        }



        /// <summary>

        /// The name of the xml root element when reading messages

        /// </summary>

        public string XmlReaderRootElementName

        {

            get { return _xmlReaderRootElementName ?? XmlFormatReader.DefaultRootElementName; }

            set { _xmlReaderRootElementName = value; }

        }



        /// <summary>

        /// Xml reader options

        /// </summary>

        public XmlReaderOptions XmlReaderOptions { get; set; }



        /// <summary>

        /// True to use formatted output including new-lines and default indentation

        /// </summary>

        public bool FormattedOutput { get; set; }



        /// <summary>

        /// The name of the xml root element when writing messages

        /// </summary>

        public string XmlWriterRootElementName

        {

            get { return _xmlWriterRootElementName ?? XmlFormatWriter.DefaultRootElementName; }

            set { _xmlWriterRootElementName = value; }

        }



        /// <summary>

        /// Xml writer options

        /// </summary>

        public XmlWriterOptions XmlWriterOptions { get; set; }

    }

}