// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System;
using System.Diagnostics;
using Roslyn.Utilities;
 
namespace Microsoft.CodeAnalysis.CSharp
{
    internal class SyntaxDiagnosticInfo : DiagnosticInfo
    {
        internal readonly int Offset;
        internal readonly int Width;
 
        internal SyntaxDiagnosticInfo(int offset, int width, ErrorCode code, params object[] args)
            : base(CSharp.MessageProvider.Instance, (int)code, args)
        {
            Debug.Assert(width >= 0);
            this.Offset = offset;
            this.Width = width;
        }
 
        internal SyntaxDiagnosticInfo(int offset, int width, ErrorCode code)
            : this(offset, width, code, Array.Empty<object>())
        {
        }
 
        internal SyntaxDiagnosticInfo(ErrorCode code, params object[] args)
            : this(0, 0, code, args)
        {
        }
 
        internal SyntaxDiagnosticInfo(ErrorCode code)
            : this(0, 0, code)
        {
        }
 
        public SyntaxDiagnosticInfo WithOffset(int offset)
        {
            return new SyntaxDiagnosticInfo(offset, this.Width, (ErrorCode)this.Code, this.Arguments);
        }
 
        protected SyntaxDiagnosticInfo(SyntaxDiagnosticInfo original, DiagnosticSeverity severity) : base(original, severity)
        {
            Offset = original.Offset;
            Width = original.Width;
        }
 
        protected override DiagnosticInfo GetInstanceWithSeverityCore(DiagnosticSeverity severity)
        {
            return new SyntaxDiagnosticInfo(this, severity);
        }
    }
}