using System;
using System.Collections.Generic;
using BeWo.Data.Entities;
using BS.Shared.Core;
using BS.Shared.DataContracts;

namespace BeWo.Service.Plugins
{
	public class GroupDurationCalculator : AbstractIDSpecificDefaultClass<GroupDurationCalculator>
	{

        public virtual GroupDurationDC CalculateGroupDuration(int personCount, int employeeCount, decimal totalDuration)
		{
			return null;
		}

		public virtual GroupDurationDC CalculateGroupDuration(int personCount, int employeeCount, decimal totalDuration,
			long[] costBearer2SupportConceptArray)
		{

            return CalculateGroupDuration(personCount, employeeCount, totalDuration);
		}

        public virtual void CalculateGroupDuration(ServiceRecordGroup group)
        {
            if (group.ServiceRecordList.Count > 0)
            {
                var dcalc = PluginLoader.FindClass<ServiceRecordDurationCalculator>();

                decimal maxRoundedDuration = 0;
                long[] costBearer2SupportConceptArray = new long[group.ServiceRecordList.Count];

                int idx = 0;
                foreach (var sr in group.ServiceRecordList)
                {
                    if (dcalc != null)
                    {
                        dcalc.CalculateRoundedDuration(sr);
                    }
                    if (sr.RoundedDuration > maxRoundedDuration)
                    {
                        maxRoundedDuration = sr.RoundedDuration;
                    }
                    costBearer2SupportConceptArray[idx++] = sr.CostBearer2SupportConcept.Oid.Value;
                }

                var dc = CalculateGroupDuration(group.CustomerCount, group.EmployeeCount, maxRoundedDuration,
                    costBearer2SupportConceptArray);


                decimal durationForSingleRecord = 0;
                decimal durationForGroup = maxRoundedDuration;

                if (dc != null)
                {
                    durationForSingleRecord = dc.SingleDuration;
                    durationForGroup = dc.TotalDuration;
                }
                else
                {
                    DateTime dt = DateTime.Now;

                    foreach (var sr in group.ServiceRecordList)
                    {
                        dt = sr.Start.Value;
                    }

                    if (dt < new DateTime(2018, 9, 1))
                    {
                        durationForSingleRecord = Math.Round(durationForGroup / group.CustomerCount, 2,
                            MidpointRounding.AwayFromZero);
                    }
                    else
                    {
                        durationForSingleRecord = Math.Ceiling(durationForGroup / group.CustomerCount);
                    }

                    
                }

                foreach (var sr in group.ServiceRecordList)
                {
                    sr.RoundedDuration = durationForSingleRecord;
                    sr.GroupRoundedDuration = durationForGroup;
                }

                group.RoundedDuration = durationForGroup;
            }
        }
    }
}