using System;
using System.IO;
using System.Text;
using System.Threading.Tasks;

namespace EthermineBotTelegramCore
{
    public static class Logger
    {
        private static string fullLogPath = AppSettings.fullLogPath;
        private static string errorLogPath = AppSettings.errorLogPath;
        
        static FileStream fullLog = new FileStream(fullLogPath, FileMode.OpenOrCreate, 
                                                                FileAccess.Write,
                                                                FileShare.None, 4096, 
                                                                FileOptions.Asynchronous | FileOptions.SequentialScan);
        static FileStream errLog = new FileStream(errorLogPath, FileMode.OpenOrCreate, 
                                                                FileAccess.Write,
                                                                FileShare.None, 4096, 
                                                                FileOptions.Asynchronous | FileOptions.SequentialScan);

        static Logger()
        {
            fullLog.Seek(0,SeekOrigin.End);
            errLog.Seek(0,SeekOrigin.End);
        }
        public async static Task LogInfo(string message)
        {
            message =  $"{DateTime.Now.ToLocalTime().ToString("[MM-dd-yyyy HH:mm:ss]")} INFO {message} \n";

            byte[] logLine = Encoding.Unicode.GetBytes(message);
            
            await fullLog.WriteAsync(logLine, 0, logLine.Length);
            
            await fullLog.FlushAsync();
        }
        
        public async static Task LogWarn(string message)
        {
            message =  $"{DateTime.Now.ToLocalTime().ToString("[MM-dd-yyyy HH:mm:ss]")} WARNING {message} \n";

            byte[] logLine = Encoding.Unicode.GetBytes(message);
            
            await fullLog.WriteAsync(logLine, 0, logLine.Length);
            
            await fullLog.FlushAsync();
        }

        public async static Task LogError(string message)
        {
            message =  $"{DateTime.Now.ToLocalTime().ToString("[MM-dd-yyyy HH:mm:ss]")} ERROR {message} \n";

            byte[] logLine = Encoding.Unicode.GetBytes(message);
            
            await fullLog.WriteAsync(logLine, 0, logLine.Length);
            await errLog.WriteAsync(logLine, 0, logLine.Length);
            
            await fullLog.FlushAsync();
            await errLog.FlushAsync();
        }

        public async static Task LogDebug(string message)
        {
            message =  $"{DateTime.Now.ToLocalTime().ToString("[MM-dd-yyyy HH:mm:ss]")} DEBUG {message} \n";

            byte[] logLine = Encoding.Unicode.GetBytes(message);
            
            await fullLog.WriteAsync(logLine, 0, logLine.Length);
            
            await fullLog.FlushAsync();
        }

        public static void Stop()
        {
            fullLog.Close();
            errLog.Close();
        }

        public async static Task Save()
        {
            await fullLog.FlushAsync();
            await errLog.FlushAsync();
        }
    }
}