using BS.Shared;
using BS.Shared.Core;
using BS.Shared.Exceptions;
using BS.Shared.Interface;
using Newtonsoft.Json;
using RestSharp.Validation;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BeWo.Service.Core
{
	public class FileLogger
	{
		private readonly string _filePath;
		private readonly LogLevel _minimumLevel;
		private readonly object _lock = new object();

		public FileLogger(string filePath, LogLevel minimumLevel = LogLevel.Debug)
		{
			if(filePath == null) throw new ArgumentNullException(nameof(filePath));
			if(!Directory.Exists(Path.GetDirectoryName(filePath))) throw new BeWoInvalidOperationException(AppError.LoggerPathDoNotExist);

			_filePath = filePath;
			_minimumLevel = minimumLevel;
		}

		public void LogJson(LogLevel level, object json, string module = null)
		{
			var str = JsonConvert.SerializeObject(json, Formatting.Indented);
			Log(level, str, module);	
		}

		public void LogError(Exception exception, string module = null)
			=> Log(LogLevel.Error, exception.ToString(), module);

		public void Log(LogLevel level, string message, string module = null)
		{
			if (level < _minimumLevel)
				return;

			string timestamp = DateTime.Now.ToString("dd.MM.yyyy HH:mm:ss,ff");
			string logEntry = $"[{timestamp}] [{level}] {module}: {message}";

			lock (_lock)
			{
				File.AppendAllText(_filePath, logEntry + Environment.NewLine);
			}
		}
	}
}