using System;
using System.Activities;
using System.ServiceModel;
using System.Globalization;
using System.Runtime.Serialization;
using System.IO;
using System.Text;
using System.Net;
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Workflow;

namespace LucasWorkflowAssemblies
{
    /// <summary>
    /// This class is used to calculate the date that is X business days from now.
    /// </summary>
    public sealed class CalculateDateByBusinessDays : CodeActivity
    {
        /// <summary>
        /// [Input("Number of business days")]
        /// This input takes the number of business days from today for which the date will be determined.
        /// </summary>
        [Input("Number of business days")]
        public InArgument<Int16> NumBusinessDays { get; set; }

        /// <summary>
        /// [Output("Calculated date")]
        /// This output is the date calculated from the supplied business days value.
        /// </summary>
        [Output("Calculated date")]
        public OutArgument<DateTime> CalculatedDate { get; set; }

        /// <summary>
        /// Executes the workflow activity
        /// </summary>
        /// <param name="executionContext">The execution context</param>
        protected override void Execute(CodeActivityContext executionContext)
        {
            int newcount = 0; 
            DateTime today = DateTime.Now;

            // give them an extra day to complete if it comes in 1 PM or later
            int adjustedBusinessDays = NumBusinessDays.Get(executionContext);
            if (today.Hour > 13)
            {
                adjustedBusinessDays++;
            }

            while (adjustedBusinessDays > 0)
            {
                newcount++;
                today = today.AddDays(1);
                if (!(today.DayOfWeek == DayOfWeek.Saturday) && !(today.DayOfWeek == DayOfWeek.Sunday))
                {
                    adjustedBusinessDays--;
                }
            }

            CalculatedDate.Set(executionContext, today);
        }
    }
}