using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Collections.Concurrent;

namespace RemSox.Logging
{
    public class InMemoryLogger : ILogger
    {
        readonly ConcurrentBag<LogEntry> logs = [];

        public void Log(string message, LogSeverity severity)
        {
            logs.Add(new LogEntry(message, severity, DateTimeOffset.UtcNow));
        }

        public void LogError(string message)
        {
            Log(message, LogSeverity.Error);
        }

        public void LogInfo(string message)
        {
            Log(message, LogSeverity.Info);
        }

        public void LogWarning(string message)
        {
            Log(message, LogSeverity.Warning);
        }

        public IEnumerable<LogEntry> GetLogs(int? count = null)
        {
            IEnumerable<LogEntry> orderedLogs = logs.OrderBy(l => l.Timestamp);
            return count.HasValue ? orderedLogs.TakeLast(count.Value) : orderedLogs;
        }
    }
}