using Firebird2D.Interfaces;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Firebird2D.Logger
{

    public class GameLogger : ILogger
    {
        private string LogFilePath = "Logs/";

        public bool LogActive { get { return _logActive; } set { _logActive = value; if (value == false) Log("Logger", LogType.Info, "Log Deactivated"); } }
         
        private bool _logActive = true;

        private FileStream? fileStream;

        private readonly object _fileLock = new();

        private static readonly List<GameLogger> instances = [];

        public int InstanceNumber { get; private set; }

        private GameLogger(int instanceNumber, string instanceName)
        {
            LogFilePath += $"Log_{instanceName}.txt";
            InstanceNumber = instanceNumber;
            Initalize();
        }

        public static ILogger GetNewInstance(string instanceName)
        {
            GameLogger instance = new(instances.Count, instanceName);
            instances.Add(instance);
            return instance;
        } 

        public static ILogger GetInstance(int instanceNumber)
        {
            return instances[instanceNumber];
        }

        private void Initalize()
        {
            if (!Directory.Exists("Logs"))
            {
                Directory.CreateDirectory("Logs");
            }

            fileStream = File.Open(LogFilePath, FileMode.OpenOrCreate | FileMode.Append, FileAccess.Write, FileShare.Read);

            lock (_fileLock)
            {
                AddText(fileStream, "===================" + DateTime.Now.ToString("dd.MM.yy HH:mm:ss") + "===================" + Environment.NewLine);
            }
        }

        public void Log(string loggingInstance, LogType type, string message)
        {
            if (_logActive && fileStream != null)
            {
                lock (_fileLock)
                {
                    AddText(fileStream, $"{DateTime.Now:HH:mm:ss} {type}: {loggingInstance} -> {message}{Environment.NewLine}");
                }
            }
        }

        private static void AddText(FileStream fs, string value)
        {
            using StreamWriter writer = new(fs, Encoding.UTF8, 1024, leaveOpen: true);
            writer.Write(value);
        }
    }
}