using System;
using System.Collections.Generic;
using System.Text;

namespace Safedispatch_4_0
{
    public class ConvertDT
    {
        private System.DateTime dateTime;

        /// <summary>
        /// This is the class constructor
        /// </summary>
        public ConvertDT()
        {
        }

        /// <summary>
        /// This method makes the conversion from Unix time to a DateTime object
        /// and returns a DateTime object
        /// </summary>
        /// <param name="param">the Unix time</param>
        /// <returns>The method returns a DateTime object</returns>
        public System.DateTime GetDTFromSeconds(Int32 param)
        {
            dateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0);
            dateTime = dateTime.AddSeconds((double)param);
            return dateTime;
        }

        /// <summary>
        /// This method converts a DateTime object into the corresponding
        /// Unix time (number of seconds from 1970/01/01) - attention, does not make
        /// any conversion to GMT time
        /// </summary>
        /// <param name="param">the DateTime object to be converted</param>
        /// <returns>the corresponding Unix time, as a uint number</returns>
        public Int32 GetSecondsFromDT(DateTime param)
        {
            System.DateTime datetime = param;
            Int32 nOfSeconds;
            System.DateTime dt70 = new DateTime(1970, 1, 1, 0, 0, 0, 0);         
            TimeSpan span = datetime - dt70;
            nOfSeconds = (Int32)span.TotalSeconds;
            return nOfSeconds;
        }

        public Int32 GetSecondsLocalFromDT(DateTime param)
        {
            System.DateTime datetime = param;
            long nOfSeconds;
            System.DateTime dt70 = new DateTime(1970, 1, 1, 0, 0, 0, 0);
            System.DateTime dttmp1 = new DateTime(1970, 1, 1, 0, 0, 0, 0);
            System.DateTime dttmp2;
            dttmp2 = dttmp1.ToLocalTime();
            TimeSpan span2 = dttmp2 - dttmp1;
            TimeSpan span = datetime - dt70;
            //nOfSeconds = (long)span.TotalSeconds - (long)span2.TotalSeconds -3600; //mai scot o ora - 3600
            if (System.TimeZone.CurrentTimeZone.IsDaylightSavingTime(param)) nOfSeconds = (long)span.TotalSeconds - (long)span2.TotalSeconds - 3600; //mai scot o ora - 3600
            else nOfSeconds = (long)span.TotalSeconds - (long)span2.TotalSeconds;
            return ((Int32)nOfSeconds);
        }

        /// <summary>
        /// This method makes the conversion from GMT Unix time to a DateTime object
        /// and returns local time as a DateTime object
        /// </summary>
        /// <param name="param">the Unix time</param>
        /// <returns>The method returns a DateTime object</returns>
        public System.DateTime GetDTLocalFromSeconds(Int32 param)
        {
            dateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0);
            dateTime = dateTime.AddSeconds((double)param);
            dateTime = dateTime.ToLocalTime();           
            return dateTime;
        }

        /// <summary>
        /// This method makes the conversion from local Unix time to a DateTime object
        /// and returns GMT time as a DateTime object
        /// </summary>
        /// <param name="param">the Unix time</param>
        /// <returns>The method returns a DateTime object</returns>
        public System.DateTime GetDTGMTFromSeconds(Int32 param)
        {
            dateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0);
            dateTime = dateTime.AddSeconds((double)param);
            dateTime = dateTime.ToUniversalTime();
            return dateTime;
        }

        /// <summary>
        /// This method converts from local time to GMT
        /// </summary>
        /// <param name="param">local time, as UNIX time</param>
        /// <returns>GMT time, as UNIX time</returns>
        public Int32 ConvertLocalToGMT(Int32 param)
        {
            DateTime time = this.GetDTFromSeconds(param);
            DateTime GMTTime = time.ToUniversalTime();
            TimeSpan span = GMTTime - time;
            Int32 nOfSeconds = (Int32)span.TotalSeconds;
            return (Int32)(nOfSeconds + param);
        }

        /// <summary>
        /// This method converts from GMT to local time
        /// </summary>
        /// <param name="param">GMT as UNIX time</param>
        /// <returns>local time, as UNIX time</returns>      
        public Int32 ConvertGMTToLocal(Int32 param)
        {
            DateTime time = this.GetDTFromSeconds(param);
            DateTime GMTTime = time.ToUniversalTime();
            TimeSpan span = time - GMTTime;
            long nOfSeconds = (long)span.TotalSeconds;
            return (Int32)(nOfSeconds + param);
        }

        /// <summary>
        /// This method converts an integer, representing the number of seconds
        /// from 00:00 to the current time of the day, to the corresponding String
        /// </summary>
        /// <param name="param">the number of seconds</param>
        /// <returns>the String in hh:mm format</returns>
        public String GetTimeFromSeconds(Int32 param)
        {
            String hours, minutes;
            Int32 hoursInt, minutesInt;

            hoursInt = param / 3600;
            minutesInt = (param - (hoursInt * 3600)) / 60;
            hours = Convert.ToString(hoursInt);
            minutes = Convert.ToString(minutesInt);
            if (hours.Length == 1)
                hours = "0" + hours;
            if (minutes.Length == 1)
                minutes = "0" + minutes;
            return (Convert.ToString(hours) + ":" + Convert.ToString(minutes));
        }

        /// <summary>
        /// Returns just the time of day from the parameter, removing all other info
        /// </summary>
        /// <param name="param">unix time</param>
        /// <returns>Time of day </returns>
        public String TimeOfDay(Int32 param)
        {
            String toReturn = "";
            DateTime tempObj = this.GetDTFromSeconds(param);

            if (tempObj.Hour >= 10)
                toReturn = toReturn + tempObj.Hour.ToString() + ":";
            else
                toReturn = toReturn + "0" + tempObj.Hour.ToString() + ":";

            if (tempObj.Minute >= 10)
                toReturn = toReturn + tempObj.Minute.ToString() + ":";
            else
                toReturn = toReturn + "0" + tempObj.Minute.ToString() + ":";

            if (tempObj.Second >= 10)
                toReturn = toReturn + tempObj.Second.ToString() + ":";
            else
                toReturn = toReturn + "0" + tempObj.Second.ToString();

            return toReturn;
        }

        public String TimeOfDayHHMMLocal(Int32 param)
        {
            Int32 ParamLoc;
            ParamLoc = ConvertGMTToLocal(param);
            String toReturn = "";
            DateTime tempObj = this.GetDTFromSeconds(ParamLoc);
            
            if (tempObj.Hour >= 10)
                toReturn = toReturn + tempObj.Hour.ToString() + ":";
            else
                toReturn = toReturn + "0" + tempObj.Hour.ToString() + ":";

            if (tempObj.Minute >= 10)
                toReturn = toReturn + tempObj.Minute.ToString();
            else
                toReturn = toReturn + "0" + tempObj.Minute.ToString();

            return toReturn;
        }


        public String TimeOfDayHHMMLocal(Int32 param, Boolean AMPMtype)
        {
            Int32 ParamLoc;
            ParamLoc = ConvertGMTToLocal(param);
            String toReturn = "";
            DateTime tempObj = this.GetDTFromSeconds(ParamLoc);
            Int32 hourX = tempObj.Hour;
            String Endis = "AM";

            if (AMPMtype)
            { 
                if (hourX>12) 
                {
                    hourX=hourX-12;
                    if (hourX<0) hourX =12;
                    Endis = "PM";
                }               
            }
            
            if (hourX >= 10)
                toReturn = toReturn + hourX.ToString() + ":";
            else
                toReturn = toReturn + "0" + hourX.ToString() + ":";            

            if (tempObj.Minute >= 10)
                toReturn = toReturn + tempObj.Minute.ToString();
            else
                toReturn = toReturn + "0" + tempObj.Minute.ToString();

            if (AMPMtype) toReturn = toReturn + " " + Endis;
            return toReturn;
        }

        public String TimeOfDayHHMMSSLocal(Int32 param, Boolean AMPMtype)
        {
            Int32 ParamLoc;
            ParamLoc = ConvertGMTToLocal(param);
            String toReturn = "";
            DateTime tempObj = this.GetDTFromSeconds(ParamLoc);
            Int32 hourX = tempObj.Hour;
            String Endis = "AM";

            if (AMPMtype)
            {
                if (hourX > 12)
                {
                    hourX = hourX - 12;
                    if (hourX < 0) hourX = 12;
                    Endis = "PM";
                }
            }

            if (hourX >= 10)
                toReturn = toReturn + hourX.ToString() + ":";
            else
                toReturn = toReturn + "0" + hourX.ToString() + ":";

            if (tempObj.Minute >= 10)
                toReturn = toReturn + tempObj.Minute.ToString() + ":";
            else
                toReturn = toReturn + "0" + tempObj.Minute.ToString() + ":";

            if (tempObj.Second >= 10)
                toReturn = toReturn + tempObj.Second.ToString();
            else
                toReturn = toReturn + "0" + tempObj.Second.ToString();

            if (AMPMtype) toReturn = toReturn + " " + Endis;
            return toReturn;
        }


        public String DateTimeOfDayHHMMLocal(Int32 param)
        {
            Int32 ParamLoc;
            ParamLoc = ConvertGMTToLocal(param);
            String toReturn = "";
            DateTime tempObj = this.GetDTFromSeconds(ParamLoc);

            if (tempObj.Hour >= 10)
                toReturn = toReturn + tempObj.Hour.ToString() + ":";
            else
                toReturn = toReturn + "0" + tempObj.Hour.ToString() + ":";

            if (tempObj.Minute >= 10)
                toReturn = toReturn + tempObj.Minute.ToString();
            else
                toReturn = toReturn + "0" + tempObj.Minute.ToString();

            //toReturn = tempObj.Month +"//"+tempObj.Day +"//"+tempObj.Year+" "+toReturn;
            toReturn = Convert.ToString(tempObj);
            //toReturn = "fane " + toReturn;
            return toReturn;
        }

        public String TimeOfDayHHMMDateTime(TimeSpan param)
        {
            String toReturn = "";

            if (param.Hours >= 10)
                toReturn = toReturn + param.Hours.ToString() + ":";
            else
                toReturn = toReturn + "0" + param.Hours.ToString() + ":";

            if (param.Minutes >= 10)
                toReturn = toReturn + param.Minutes.ToString();
            else
                toReturn = toReturn + "0" + param.Minutes.ToString();

            return toReturn;
        }

        public String DatePickerToDateHHMM(DateTime Data)
        {
            String toReturn = "";
            toReturn = toReturn + System.Convert.ToString(Data.Date.ToShortDateString()) + "    ";
            if (Data.TimeOfDay.Hours >= 10)
                toReturn = toReturn + Data.TimeOfDay.Hours.ToString() + ":";
            else
                toReturn = toReturn + "0" + Data.TimeOfDay.Hours.ToString() + ":";

            if (Data.TimeOfDay.Minutes >= 10)
                toReturn = toReturn + Data.TimeOfDay.Minutes.ToString();
            else
                toReturn = toReturn + "0" + Data.TimeOfDay.Minutes.ToString();

            return toReturn;
        }
    }
}