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

namespace ShowTrend3.Libs
{
    public static class CustomConverters
    {
        private static DateTime _jan1st1970 = new DateTime(1970, 1, 1);
        public static long JStDateConv(DateTime from)
        {
            return System.Convert.ToInt64((from - _jan1st1970).TotalMilliseconds);
        }
        public static DateTime JStDateConv(long from)
        {
            return _jan1st1970.AddMilliseconds(from);
        }
        public static int ArchNameToNumVDP(string s)
        {
            var t = s.Split('.');
            if (t.Last() != "gz")
                return int.Parse(t.Last());
            t = t[0].Split('-');
            if (t.Length == 2)
                return int.Parse(t.Last());
            if (t.Length == 4)
                return int.Parse(t[2]);
            return -1;
        }

        public static bool CompareStringBuilder(ref StringBuilder a, StringBuilder b)
        {
            if (a.Length <= 0 || b.Length <= 0)
                return false;
            if (a[0] != '[' && a[a.Length - 1] != ']')
                return false;
            if (b[0] != '[' && b[b.Length - 1] != ']')
                return false;
            if (b.Length > 2)
            {
                a.Remove(a.Length - 1, 1);
                if (a.Length > 1)
                    a.Append(',');
                a.Append(b, 1, b.Length - 1);
            }
            return true;
        }

        public static string ExceptionToString(Exception e)
        {
            string res = "";
            char sl = RuntimeInformation.IsOSPlatform(OSPlatform.Linux) ? '/' : '\\';
            var st = new StackTrace(e, true).GetFrame(0);
            res = st.GetFileName().Split(sl).Last() + " > " +
                st.GetMethod().DeclaringType + " > " +
                st.GetMethod() + " > " +
                st.GetFileLineNumber() + ":" +
                st.GetFileColumnNumber() + " > " +
                e.Message;
            return res;
        }
}
}