using Microsoft.Extensions.Logging;

namespace Big.Tests;

/// <summary>A minimal <see cref="ILogger{T}"/> that records the level and rendered message of each
/// entry, so tests can assert that (for example) a failing job was logged.</summary>
internal sealed class CapturingLogger<T> : ILogger<T>
{
    public List<(LogLevel Level, string Message)> Entries { get; } = [];

    public IDisposable BeginScope<TState>(TState state) where TState : notnull => NullScope.Instance;

    public bool IsEnabled(LogLevel logLevel) => true;

    public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception? exception,
        Func<TState, Exception?, string> formatter)
        => Entries.Add((logLevel, formatter(state, exception)));

    private sealed class NullScope : IDisposable
    {
        public static readonly NullScope Instance = new();
        public void Dispose() { }
    }
}