using System;
using System.Collections.Generic;
using System.Linq;
using BeWo.Data.Access;
using BeWo.Data.Entities;
using BeWo.Service.DCEntityMapper;

using BS.Shared;
using BS.Shared.Core;
using BS.Shared.DataContracts;
using BS.Shared.DataContracts.Compact;
using BS.Shared.Extensions;
using BS.Shared.Services;
using BeWo.Service.Configuration;
using BeWo.Data.Security;

using SecurityUtils = BeWo.Service.Security.SecurityUtils;
using BeWo.Service.ServiceImplementations;

namespace BeWo.Service.Plugins
{
	public class SupportConceptValidator
	{
		public virtual List<ValidationResultDC> ValidateSupportConcept(SupportConceptDC supportConcept)
		{
			var result = new List<ValidationResultDC>();

			bool isNew = !supportConcept.SupportConceptOid.HasValue;

            // 1. Prüfe Datumsbereiche. Startdatum darf nicht größer als Enddatum sein
            bool containsDatumCheck = false;
            if (supportConcept.CostBearerRelations != null)
            {
                foreach (var c2s in supportConcept.CostBearerRelations)
                {
                    if (!containsDatumCheck)
                    {
                        var val = CheckDate(c2s.StartDate, c2s.EndDate, c2s, null);
                        if (val != null)
                        {
                            result.Add(val);
                            containsDatumCheck = true;
                        }

                        if (c2s.ApprovalPeriodList != null)
                        {
                            foreach (var ap in c2s.ApprovalPeriodList)
                            {
                                if (!containsDatumCheck)
                                {
                                    val = CheckDate(ap.StartDate, ap.EndDate, c2s, ap);
                                    if (val != null)
                                    {
                                        result.Add(val);
                                        containsDatumCheck = true;
                                    }
                                }
                            }

                        }
                    }
                    
                }
            }
            
            return result;
		}

        private ValidationResultDC CheckDate(DateTime? start, DateTime? end, SupportConceptCostBearerRelDC c2s, SupportConceptApprovalPeriodDC scap)
        {
            if (start.HasValue && end.HasValue && start > end)
            {
                ValidationResultDC resultDc = new ValidationResultDC();
                resultDc.Message = "Das Startdatum darf nicht größer als das Enddatum sein.";

                if (scap == null)
                {

                }
                resultDc.AllowSave = false;
                return resultDc;
            }
            return null;
        }

		public virtual List<ValidationResultDC> ValidateSupportConceptDeletion(long supportConceptOid)
		{
			var result = new List<ValidationResultDC>();

            var os = new OperationsServiceImp();

            var list = os.GetSupportConceptInfosForSupportConceptOid(supportConceptOid);
            
            if (list != null && list.Count > 0)
            {
                var containsServiceRecords = false;
                foreach (var info in list.Where(info => info.RecordedHours > 0))
                {
                    containsServiceRecords = true;
                }

                if (containsServiceRecords)
                {

                    ValidationResultDC resultDc = new ValidationResultDC();
                    resultDc.Message = "Für den gewählten Hilfeplan wurden bereits Leistungen hinterlegt.";
                    resultDc.AllowSave = true;
                    result.Add(resultDc);
                }

            }
            
			return result;
		}

	}
}