// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System;
using Microsoft.Extensions.Logging;
using Xunit;
 
namespace Microsoft.Shared.ProjectTemplates.Tests;
 
internal sealed class XunitLoggerProvider : ILoggerProvider
{
    private readonly ITestOutputHelper _output;
 
    public XunitLoggerProvider(ITestOutputHelper output)
    {
        _output = output;
    }
 
    public ILogger CreateLogger(string categoryName) => new XunitLogger(_output, categoryName);
 
    public void Dispose()
    {
        // Nothing to dispose.
    }
 
    private sealed class XunitLogger : ILogger
    {
        private readonly ITestOutputHelper _output;
        private readonly string _categoryName;
 
        public XunitLogger(ITestOutputHelper output, string categoryName)
        {
            _output = output;
            _categoryName = categoryName;
        }
 
        public IDisposable? BeginScope<TState>(TState state)
            where TState : notnull => null;
 
        public bool IsEnabled(LogLevel logLevel) => true;
 
        public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception? exception, Func<TState, Exception?, string> formatter)
        {
            _output.WriteLine($"[{logLevel}] {_categoryName}: {formatter(state, exception)}");
 
            if (exception is not null)
            {
                _output.WriteLine(exception.ToString());
            }
        }
    }
}