using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;


namespace XYLEM.Base.Files
{
    public class ProgramLogCSVFileClass
    {
        private int _LogCountErrors = -1;
        private int _LogCountTotal = -1;

        public int LogCountErrors { get { return _LogCountErrors; } }
        public int LogCountTotal { get { return _LogCountTotal; } }

        public string StdLogFilePath = null;

        public event EventHandler OnErrorIsAdded;

#if (!DEBUG)
        public bool DoTimeStamp = false;
#else
        /*#warning DoTimeStamp is true!!!!!!!!!!!!!!!!
        public bool DoTimeStamp = true;*/
        public bool DoTimeStamp = false;
#endif
        /// <summary>
        /// init standard program logger
        /// </summary>
        /// <param name="stdLogFolderPath">use a custom log folder or null if use default</param>
        /// <param name="filename">set a custom log file name without extension (ex. "UserCustomLogFile") or null if use default</param>
        public ProgramLogCSVFileClass(string stdLogFolderPath = null, string filename = null)
        {
            if (String.IsNullOrEmpty(filename))
            {
                filename = $"{AppConst.ProductVersion}_program_log";
            }
            if (!string.IsNullOrEmpty(stdLogFolderPath))
            {
                if (!Directory.Exists(stdLogFolderPath))
                {
                    PathTools.CreateDirPath(stdLogFolderPath);
                }
                StdLogFilePath=Path.Combine(stdLogFolderPath, filename + ".txt");
            }
            else
            {
                this.StdLogFilePath = Path.Combine(AppConst.ProgramUserFolderRootPath(), filename + ".txt");
#if (DEBUG)
                Console.WriteLine($"Using standard program log path:\n{this.StdLogFilePath}");
#endif                
            }
        }

        /// <summary>
        /// Automated get function name for the function calling this
        /// Used for automating getting a function name to write in a log
        /// </summary>
        /// <param name="inclMsg">Add extra message to log with function name </param>
        /// <returns>"[CALLING_FUNCTION_NAME]() -> [inclMsg]"</returns>
        [MethodImpl(MethodImplOptions.NoInlining)]
        public string GetCurrentMethod(string inclMsg = null)
        {
            var st = new StackTrace();
            var sf = st.GetFrame(1);

            var nameTxt = $"{sf.GetMethod().Name}()";
            if (!String.IsNullOrEmpty(inclMsg))
            {
                nameTxt += " -> " + inclMsg;
            }
            return nameTxt;
        }

        /// <summary>
        /// Automated get function name for the function calling this
        /// Used for automating getting a function name to write in a log
        /// </summary>
        /// <param name="inclMsg">Add extra message to log with function name </param>
        /// <returns>"[CALLING_FUNCTION_NAME]() -> [inclMsg]"</returns>
        [MethodImpl(MethodImplOptions.NoInlining)]
        public static string GetCurrentStaticMethod(string inclMsg = null)
        {
            var st = new StackTrace();
            var sf = st.GetFrame(1);

            var nameTxt = $"{sf.GetMethod().Name}()";
            if (!String.IsNullOrEmpty(inclMsg))
            {
                nameTxt += " -> " + inclMsg;
            }
            return nameTxt;
        }

        internal void AddToLogFile(bool isError, string nameSingleLine, string infoMultibleLines)
        {
            AddToLogFile(isError, StdLogFilePath, nameSingleLine, infoMultibleLines);
        }

        internal void AddToLogFile(bool isError, string LogFilePath, string nameSingleLine, string infoMultibleLines)
        {
            try
            {
                if (isError)
                {
                    _LogCountErrors++;
                    try
                    {
                        if (OnErrorIsAdded != null)
                        {
                            OnErrorIsAdded(null, null);
                        }
                    }
                    catch { } // Don't handle this if something breaks down 
                }
                _LogCountTotal++;
                if (System.IO.File.Exists(LogFilePath))
                {
                    FileInfo f = new FileInfo(LogFilePath);
                    if (f.Length > (DoTimeStamp ? 1000000 : 10000))
                    {
                        f.Delete();
                    }
                }
                else
                {
                    PathTools.CreateDirPathForFile(LogFilePath);
                }
                var message = infoMultibleLines;
                var length = message.Length;
                File.AppendAllText(LogFilePath, "¤¤¤ " + nameSingleLine.Trim() + " \"" + DateTime.Now.ToString() + "\" ¤¤¤ " + Environment.NewLine
                    + message + Environment.NewLine);
#if (DEBUG)
                System.Diagnostics.Debug.WriteLine(DateTime.Now.ToString("HH:mm:ss.fff ") +
                    " ¤¤¤ " + nameSingleLine.Trim() + " ¤¤¤ " + Environment.NewLine
                    + message
                );
#endif
            }
            catch (Exception ex)
            { // Ups just to make sure that this don't result in program is closed
                string test = ex.ToMessageText();
            }
        }

        /// <summary>
        /// Add a time stamp in program log file.. used to time differend code / controls load time
        /// </summary>
        /// <param name="processObj"> class or window / control obkject to make time stamp for</param>
        /// <param name="desc">description text</param>
        /// <param name="forceLog">Force making log and ignore DoTimeStamp setting</param>
        internal void AddToTimestampLog(object processObj, string desc, bool forceLog = false)
        {
            try
            {
                if (DoTimeStamp || forceLog)
                {
                    AddToLogFile(false, StdLogFilePath, processObj.ToString() + DateTime.Now.ToString(" [HH:mm:ss fff]"), desc);
                }
            }
            catch { }
        }

        internal void AddToProgramLogFile(bool isError, string nameSingleLine, string infoMultibleLines)
        {
            AddToLogFile(isError, StdLogFilePath, nameSingleLine, infoMultibleLines);
        }

        /// <summary>
        /// Add to program log
        /// </summary>
        /// <param name="ex">Exception to log</param>
        /// <param name="isError">Is an error or just as log</param>
        /// <param name="className">what class or where function is located in</param>
        /// <param name="functionName">what function it was in like "myFunc()" and null if not used</param>
        /// <param name="dataInfo">Additional information also to include like "while doing x and y..."</param>
        internal void ToLog(Exception ex, bool isError, string className, string functionName = null, string dataInfo = null)
        {
            AddToProgramLogFile(isError, LogMessageTool.ToFuncText(isError, className, functionName),
                (String.IsNullOrEmpty(dataInfo) ? "" : dataInfo + ((ex != null) ? Environment.NewLine : "")) // Add data info if used
                + ((ex != null) ? ex.ToMessageText() : ""));
        }

        internal void AddFuncLog(bool isError, string className, string functionName, string dataInfo, Exception ex)
        {
            ToLog(ex, isError, className, functionName, dataInfo);
        }

        internal void AddFuncLog(bool isError, string className, string functionName, Exception ex)
        {
            AddFuncLog(isError, className, functionName, null, ex);
        }

        internal void AddFuncLog(bool isError, string className, string functionName, string dataInfo)
        {
            AddFuncLog(isError, className, functionName, dataInfo, null);
        }

        internal void AddClassInitLog(bool isError, string className, Exception ex)
        {
            AddToProgramLogFile(isError, LogMessageTool.ToInitText(isError, className), ((ex != null) ? ex.ToMessageText() : ""));
        }

        internal void AddClassInitLog(bool isError, string className, string dataInfo, Exception ex)
        {
            AddToProgramLogFile(isError, LogMessageTool.ToInitText(isError, className, dataInfo), ((ex != null) ? ex.ToMessageText() : ""));
        }

        internal void OpenProgramLogFile()
        {
            OpenLogFile(StdLogFilePath);
        }


        internal void OpenLogFile(string LogFilePath)
        {
            try
            {
                Process.Start(LogFilePath);
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error Open Log " + Environment.NewLine + ex.ToMessageText());
            }
        }
    }
}