using Microsoft.Extensions.Logging;
using Xunit.Abstractions;

namespace Tests;

public 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() {
    }

    private sealed class XUnitLogger : ILogger {
        private readonly string _category;
        private readonly ITestOutputHelper _output;

        public XUnitLogger(ITestOutputHelper output, string category) {
            _output = output;
            _category = category;
        }

        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}] {_category}: {formatter(state, exception)}");
    }
}