using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using Tango.Integration.Operation;
using Tango.Logging;
using Tango.Settings;

namespace Tango.MachineStudio.Logging.Parsing
{
    public class EmbeddedLogFileParser : ILogFileParser<EmbeddedLogItem>
    {
        public List<LogFile> GetLogFiles()
        {
            List<LogFile> logFiles = new List<LogFile>();

            FileLogger logger = MachineOperator.EmbeddedLogManager.RegisteredLoggers.FirstOrDefault(x => x.GetType() == typeof(FileLogger)) as FileLogger;

            String logFile = logger != null ? logger.LogFile : null;

            if (Directory.Exists(MachineOperator.EmbeddedLogsFolder))
            {
                foreach (var file in Directory.GetFiles(MachineOperator.EmbeddedLogsFolder, "*.log").Where(x => x != logFile))
                {
                    String dateString = Path.GetFileNameWithoutExtension(file).Replace(MachineOperator.EmbeddedLogsTag + "-", "");
                    DateTime date = DateTime.ParseExact(dateString, "dd-MM-yyyy_HH-mm-ss", CultureInfo.InvariantCulture);
                    logFiles.Add(new LogFile() { DateTime = date, File = file });
                }
            }

            return logFiles;
        }

        public List<EmbeddedLogItem> Parse(LogFile logFile)
        {
            List<EmbeddedLogItem> logItems = new List<EmbeddedLogItem>();

            String text = File.ReadAllText(logFile.File);
            var logs = Regex.Split(text, @"(\[\d{2}:\d{2}:\d{2}.\d{2}\])");

            for (int i = 1; i < logs.Length; i += 2)
            {
                try
                {
                    DateTime date = DateTime.ParseExact(logs[i].Replace("[", "").Replace("]", ""), "HH:mm:ss.ff", CultureInfo.InvariantCulture);
                    String rest = logs[i + 1];

                    var entries = Regex.Split(rest, @"\[(.*?)\]");

                    EmbeddedLogItem item = new EmbeddedLogItem(new PMR.Debugging.StartDebugLogResponse()
                    {
                        Category = (PMR.Debugging.DebugLogCategory)Enum.Parse(typeof(PMR.Debugging.DebugLogCategory), entries[1]),
                        FileName = entries[3],
                        LineNumber = uint.Parse(entries[5]),
                        ModuleId = uint.Parse(entries[7]),
                        Filter = uint.Parse(entries[9]),
                        Message = new String(entries[10].Skip(2).ToArray())
                    });

                    item.TimeStamp = new DateTime(logFile.DateTime.Year, logFile.DateTime.Month, logFile.DateTime.Day, date.Hour, date.Minute, date.Second, date.Millisecond);

                    logItems.Add(item);
                }
                catch (Exception ex)
                {
                    LogManager.Default.Log(ex, "Could not parse log line: " + logs[i]);
                }
            }

            return logItems;
        }
    }
}