#region Copyright notice and license
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
#endregion

using System;
using System.IO;

namespace Google.Protobuf
{
    /// <summary>
    /// Thrown when a protocol message being parsed is invalid in some way,
    /// e.g. it contains a malformed varint or a negative byte length.
    /// </summary>
    public sealed class InvalidProtocolBufferException : IOException
    {
        internal InvalidProtocolBufferException(string message)
            : base(message)
        {
        }

        internal InvalidProtocolBufferException(string message, Exception innerException)
            : base(message, innerException)
        {
        }

        internal static InvalidProtocolBufferException MoreDataAvailable()
        {
            return new InvalidProtocolBufferException(
                "Completed reading a message while more data was available in the stream.");
        }

        internal static InvalidProtocolBufferException TruncatedMessage()
        {
            return new InvalidProtocolBufferException(
                "While parsing a protocol message, the input ended unexpectedly " +
                "in the middle of a field.  This could mean either that the " +
                "input has been truncated or that an embedded message " +
                "misreported its own length.");
        }

        internal static InvalidProtocolBufferException NegativeSize()
        {
            return new InvalidProtocolBufferException(
                "CodedInputStream encountered an embedded string or message " +
                "which claimed to have negative size.");
        }

        internal static InvalidProtocolBufferException MalformedVarint()
        {
            return new InvalidProtocolBufferException(
                "CodedInputStream encountered a malformed varint.");
        }

        /// <summary>
        /// Creates an exception for an error condition of an invalid tag being encountered.
        /// </summary>
        internal static InvalidProtocolBufferException InvalidTag()
        {
            return new InvalidProtocolBufferException(
                "Protocol message contained an invalid tag (zero).");
        }

        internal static InvalidProtocolBufferException InvalidWireType()
        {
            return new InvalidProtocolBufferException(
                "Protocol message contained a tag with an invalid wire type.");
        }

        internal static InvalidProtocolBufferException InvalidBase64(Exception innerException)
        {
            return new InvalidProtocolBufferException("Invalid base64 data", innerException);
        }

        internal static InvalidProtocolBufferException InvalidUtf8(Exception innerException)
        {
            return new InvalidProtocolBufferException(
                "String is invalid UTF-8.", innerException);
        }

        internal static InvalidProtocolBufferException InvalidEndTag()
        {
            return new InvalidProtocolBufferException(
                "Protocol message end-group tag did not match expected tag.");
        }

        internal static InvalidProtocolBufferException RecursionLimitExceeded()
        {
            return new InvalidProtocolBufferException(
                "Protocol message had too many levels of nesting.  May be malicious.  " +
                "Use CodedInputStream.SetRecursionLimit() to increase the depth limit.");
        }

        internal static InvalidProtocolBufferException JsonRecursionLimitExceeded()
        {
            return new InvalidProtocolBufferException(
                "Protocol message had too many levels of nesting.  May be malicious.  " +
                "Use JsonParser.Settings to increase the depth limit.");
        }

        internal static InvalidProtocolBufferException SizeLimitExceeded()
        {
            return new InvalidProtocolBufferException(
                "Protocol message was too large.  May be malicious.  " +
                "Use CodedInputStream.SetSizeLimit() to increase the size limit.");
        }

        internal static InvalidProtocolBufferException InvalidMessageStreamTag()
        {
            return new InvalidProtocolBufferException(
                "Stream of protocol messages had invalid tag. Expected tag is length-delimited field 1.");
        }

        internal static InvalidProtocolBufferException MissingFields()
        {
            return new InvalidProtocolBufferException("Message was missing required fields");
        }
    }
}