using System;

using System.Collections.Generic;

using Ardalis.Result;

using MediatR;

using Humanizer;

public class Program

{

    public static void Main()

    {

        var normalCommand1 = new Command1();

        var normalCommand2 = new Command2();

        var scheduledCommand1 = new Command3(DateTimeOffset.UtcNow.AddDays(3));

        var commandList = new List<WorkflowCommand>()

        {

            normalCommand1,

            normalCommand2,

            scheduledCommand1,

        };

        foreach (var command in commandList)

        {

            if (command is ScheduledWorkflowCommand)

            {

                var scheduledCommand = (ScheduledWorkflowCommand)command;

                Console.WriteLine($"Scheduled Command: {scheduledCommand.StepDisplayName} scheduled {scheduledCommand.ExecuteAfter.Humanize()}");

            }

            else if (command is WorkflowCommand)

            {

                Console.WriteLine($"Normal Command: {command.StepDisplayName}");

            }

        }

    }

}

public abstract class WorkflowCommand : IRequest<Result>

{

    public WorkflowCommand(string stepDisplayName) => this.StepDisplayName = stepDisplayName;

    public string StepDisplayName { get; }

}

// Create some sample commands

public class Command1 : WorkflowCommand

{

    public Command1() : base("Step 1")

    {

    }

}

public class Command2 : WorkflowCommand

{

    public Command2() : base("Step 2")

    {

    }

}

​

public abstract class ScheduledWorkflowCommand : WorkflowCommand

{

    public ScheduledWorkflowCommand(string displayname, DateTimeOffset executeAfter)

        : base($"Scheduled Command - {displayname}")

    {

        this.ExecuteAfter = executeAfter;

    }

    public DateTimeOffset ExecuteAfter { get; set; }

    public WorkflowCommand Command { get; }

}

​

public class Command3 : ScheduledWorkflowCommand

{

    public Command3(DateTimeOffset executeAfter) 

        : base("Step 3", executeAfter)

    {

    }

}