// 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 Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.LanguageServer;
using Microsoft.CommonLanguageServerProtocol.Framework;
using Microsoft.VisualStudio.LogHub;

namespace Microsoft.VisualStudio.LanguageServices.Implementation.LanguageClient;

internal sealed class LogHubLspLogger : AbstractLspLogger, ILspService
{
    private readonly TraceConfiguration _configuration;
    private readonly TraceSource _traceSource;
    private bool _disposed;

    public LogHubLspLogger(TraceConfiguration configuration, TraceSource traceSource)
    {
        _configuration = configuration ?? throw new ArgumentNullException(nameof(configuration));
        _traceSource = traceSource ?? throw new ArgumentNullException(nameof(traceSource));
    }

    public void Dispose()
    {
        if (_disposed)
        {
            Contract.Fail($"{GetType().FullName} was double disposed");
            return;
        }

        _disposed = true;
        _traceSource.Flush();
        _traceSource.Close();
        _configuration.Dispose();
    }

    public override IDisposable? CreateContext(string context) => null;
    public override IDisposable? CreateLanguageContext(string? language) => null;

    public override void LogDebug(string message, params object[] @params)
    {
        _traceSource.TraceEvent(TraceEventType.Verbose, id: 0, message);
    }

    public override void LogInformation(string message, params object[] @params)
    {
        // Explicitly call TraceEvent here instead of TraceInformation.
        // TraceInformation indirectly calls string.Format which throws if the message
        // has unescaped curlies in it (can be a part of a URI for example).
        // Since we have no need to call string.Format here, we don't.
        _traceSource.TraceEvent(TraceEventType.Information, id: 0, message);
    }

    public override void LogWarning(string message, params object[] @params)
    {
        _traceSource.TraceEvent(TraceEventType.Warning, id: 0, message);
    }

    public override void LogError(string message, params object[] @params)
    {
        _traceSource.TraceEvent(TraceEventType.Error, id: 0, message);
    }

    public override void LogException(Exception exception, string? message = null, params object[] @params)
    {
        _traceSource.TraceEvent(TraceEventType.Error, id: 0, "Exception: {0}", exception);
    }
}
