using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;

namespace KHSCALE_TP
{
    public class U3Util
    {
        static public Random rnd = new Random(new System.DateTime().Millisecond);

        static public string GetErrorLogFile(bool bFullPath)
        {
            string AppPath = Application.ExecutablePath.Substring(0, Application.ExecutablePath.LastIndexOf("\\"));
            string AppName = Application.ExecutablePath.Substring(Application.ExecutablePath.LastIndexOf("\\") + 1);
            string AppTitle = AppName.Substring(0, AppName.LastIndexOf("."));

            if (bFullPath)
                return AppPath + "\\" + AppTitle + "Error.txt";
            else
                return AppTitle + "Error.txt";
        }

        static public string GetEventLogFile(bool bFullPath)
        {
            string AppPath = Application.ExecutablePath.Substring(0, Application.ExecutablePath.LastIndexOf("\\"));
            string AppName = Application.ExecutablePath.Substring(Application.ExecutablePath.LastIndexOf("\\") + 1);
            string AppTitle = AppName.Substring(0, AppName.LastIndexOf("."));

            if (bFullPath)
                return AppPath + "\\" + AppTitle + "Event.txt";
            else
                return AppTitle + "Event.txt";
        }

        static public string GetImagePath()
        {
            string AppPath = Application.ExecutablePath.Substring(0, Application.ExecutablePath.LastIndexOf("\\"));
            return AppPath + "\\" + "Images";
        }

        public static Bitmap ResizeImage(Image image, int width, int height)
        {
            var destRect = new Rectangle(0, 0, width, height);
            var destImage = new Bitmap(width, height);

            destImage.SetResolution(image.HorizontalResolution, image.VerticalResolution);

            using (var graphics = Graphics.FromImage(destImage))
            {
                graphics.CompositingMode = CompositingMode.SourceCopy;
                graphics.CompositingQuality = CompositingQuality.HighQuality;
                graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
                graphics.SmoothingMode = SmoothingMode.HighQuality;
                graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;

                using (var wrapMode = new ImageAttributes())
                {
                    wrapMode.SetWrapMode(WrapMode.TileFlipXY);
                    graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, wrapMode);
                }
            }
            return destImage;
        }

        public static void ErrorLog(string strLog)
        {
            try
            {
                FileLog(strLog, GetErrorLogFile(false));
            }
            catch
            {
            }
        }

        public static void EventLog(string strLog)
        {
            try
            {
                FileLog(strLog, GetEventLogFile(false));
            }
            catch
            {
            }
        }

        public static void FileLog(string strLog, string strFileName)
        {
            string str = "";

            DateTime t = DateTime.Now;
            str = t.ToString("(yyyy-MM-dd HH:mm:ss.fff) ");
            str += strLog;

            try
            {
                string AppPath = Application.ExecutablePath.Substring(0, Application.ExecutablePath.LastIndexOf("\\"));
                string strLogFile = AppPath + "\\" + strFileName;
                FileBackup(strLogFile);
                FileWrite(strLogFile, str);
            }
            catch (Exception ex)
            {
                throw new Exception("FileLog->:" + ex.Message);
            }
        }

        public static void FileBackup(string strLogFile)
        {
            if (File.Exists(strLogFile))
            {
                try
                {
                    FileInfo f = new FileInfo(strLogFile);
                    if (f.Length >= (2 * 1024 * 1024))
                    {
                        System.IO.File.Delete(strLogFile + ".bak");
                        f.MoveTo(strLogFile + ".bak");
                    }
                }
                catch (Exception ex)
                {
                    throw new Exception("FileBackup->:" + ex.Message);
                }
            }
        }

        public static void FileWrite(string strLogFile, string str)
        {
            try
            {
                FileStream fs = new FileStream(strLogFile, FileMode.OpenOrCreate, FileAccess.Write, FileShare.None);
                fs.Seek(0, SeekOrigin.End);
                StreamWriter swFromFile = new StreamWriter(fs);
                swFromFile.WriteLine(str);
                swFromFile.Close();
                fs.Close();
            }
            catch (Exception ex)
            {
                ErrorLog("FileWrite->:" + ex.Message);
            }
        }

        public static string FileRead(string strFileName)
        {
            if (System.IO.File.Exists(strFileName) == false) return "";

            string result = "";
            try
            {
                FileStream fs = new FileStream(strFileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
                fs.Seek(0, SeekOrigin.Begin);
                StreamReader srFile = new StreamReader(fs, Encoding.Default, true);
                result = srFile.ReadToEnd();
                srFile.Close();
                fs.Close();
            }
            catch (Exception ex)
            {
                ErrorLog("FileRead->:" + ex.Message);
            }
            return result;
        }

        public static bool GetBit(byte b, int bitNumber)
        {
            return (b & (1 << bitNumber)) != 0;
        }

        public static bool GetBit(short s, int bitNumber)
        {
            return (s & (1 << bitNumber)) != 0;
        }

        static public DateTime FromUnixTime(long unixTime)
        {
            var epoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
            return epoch.AddSeconds(unixTime);
        }

        static public Int32 ToUnixTime(DateTime dt)
        {
            return (Int32)(dt.Subtract(new DateTime(1970, 1, 1, 0, 0, 0))).TotalSeconds;
        }
    }
}