using System;

namespace GisConverter.Lib.Logging
{
    /// <summary>
    /// A no-op logger implementation. Safe to use when logging is disabled.
    /// </summary>
    /// <remarks>
    /// - Methods intentionally do nothing and must not throw.
    /// - Use <see cref="Instance"/> to avoid allocating multiple empty objects.
    /// - This class is thread-safe by design (stateless).
    /// </remarks>
    public sealed class NullLogger : IAppLogger
    {
        /// <summary>
        /// Shared instance to avoid unnecessary allocations.
        /// </summary>
        public static readonly NullLogger Instance = new NullLogger();

        // Private ctor encourages use of Instance when appropriate.
        internal NullLogger() { }

        public void Debug(object? message) { /* intentionally no-op */ }
        public void Info(object? message) { /* intentionally no-op */ }
        public void Warn(object? message) { /* intentionally no-op */ }
        public void Error(object? message, Exception? ex = null) { /* intentionally no-op */ }
    }
}