using System;

using System.Linq;

using NCrontab;

using CronExpressionDescriptor;

using System.Globalization;

public class Program

{

    public static void Main()

    {   

        // voir https://github.com/atifaziz/NCrontab

        /* syntaxe:

* * * * *

- - - - -

| | | | |

| | | | +----- day of week (0 - 6) (Sunday=0)

| | | +------- month (1 - 12)

| | +--------- day of month (1 - 31)

| +----------- hour (0 - 23)

+------------- min (0 - 59)

​

*/

        var scheduleString = "* * 1,8,15,22,29 * Wed";

        // var schedule = CrontabSchedule.Parse("*/5 * * * *"); // tout les 5 minutes

        // var schedule = CrontabSchedule.Parse("0 1 * * *"); // tout les jours à 01:00

        var schedule = CrontabSchedule.Parse(scheduleString); // tout les lundi à 12:00 (marche aussi avec 0 12 * * Mon)

        // var schedule = CrontabSchedule.Parse("0 0 1 * *"); // tout les 1er du mois à 00:00

        var occurences = schedule.GetNextOccurrences(DateTime.Now, DateTime.Now.AddDays(31));

        var parser = new CronExpressionDescriptor.ExpressionParser(scheduleString, new Options());

        parser.Parse();

        var desc = CronExpressionDescriptor.ExpressionDescriptor.GetDescription(scheduleString);

        Console.WriteLine(String.Format("Schedule '{0}' = {1}", scheduleString, desc));

        foreach (var occurence in occurences.Take(10))

        {           

            Console.WriteLine(String.Format(CultureInfo.GetCultureInfo("en-US"), "{0:D} {0:T}", occurence));

        }

    }

}