using AICore.Context.Summary;
using BeWo.Data.Access;
using BeWo.Data.Entities;
using BeWo.Service.DCEntityMapper;
using BeWo.Service.ServiceImplementations;
using BS.Shared.DataContracts.Compact;
using BS.Shared.DataContracts;
using BS.Shared;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using AICore.Context.Core;

namespace BeWo.Service.ServiceUtils
{
	public static class AiContextLoader
	{
		public static BaseContextSummary LoadContext(AiContextType uicontext, Dictionary<TableID, long[]> context_reference)
		{
			switch (uicontext)
			{
				case AiContextType.SupportConceptNavigation:
				case AiContextType.CustomerNavigation:
				case AiContextType.PersonNavigation:
				case AiContextType.EmployeeNavigation:
				case AiContextType.OrganisationNavigation:
					return loadNavigationContext(uicontext, context_reference);
				case AiContextType.CustomerDetail:
				case AiContextType.PersonDetail:
				case AiContextType.EmployeeDetail:
				case AiContextType.OrganisationDetail:
				case AiContextType.SupportConceptDetail:
					return loadDetailContext(uicontext, context_reference);
				case AiContextType.ServiceRecord:
					return loadServiceRecordContext(context_reference);
				default:
					break;
			}

			throw new NotImplementedException();
		}

		private static BaseContextSummary loadNavigationContext(AiContextType uicontext, Dictionary<TableID, long[]> context_reference)
		{
			switch (uicontext)
			{
				case AiContextType.SupportConceptNavigation:
					var list = new CustomerServiceImp().GetAllAuthorizedCompactSupportConcepts();
					var filter = list.Where(x => oidsContainsOid(context_reference[TableID.SupportConcept], x.SupportConceptOid));
					return AiContextSummaryFactory.CreateSupportConceptNavigationContextSummary(filter);
				case AiContextType.CustomerNavigation:
					var list2 = new CustomerServiceImp().GetAllAuthorizedCompactCustomers();
					var filter2 = list2.Where(x => oidsContainsOid(context_reference[TableID.Customer], x.CustomerOid));
					return AiContextSummaryFactory.CreateCustomerNavigationContextSummary(filter2);
				case AiContextType.PersonNavigation:
					var list3 = new CustomerServiceImp().GetAllAuthorizedCompactPersons();
					var filter3 = list3.Where(x => oidsContainsOid(context_reference[TableID.Person], x.PersonOid));
					return AiContextSummaryFactory.CreatePersonNavigationContextSummary(filter3);
				case AiContextType.EmployeeNavigation:
					var list4 = new EmployeeServiceImp().GetAllCompactEmployees();
					var filter4 = list4.Where(x => oidsContainsOid(context_reference[TableID.Employee], x.EmployeeOid));
					return AiContextSummaryFactory.CreateEmployeeNavigationContextSummary(filter4);
				case AiContextType.OrganisationNavigation:
					var list5 = new CustomerServiceImp().GetAllOrganisationsCompact();
					var filter5 = list5.Where(x => oidsContainsOid(context_reference[TableID.Organisation], x.OrganisationOid));
					return AiContextSummaryFactory.CreateOrganisationNavigationContextSummary(filter5);
			}

			throw new NotImplementedException();
		}

		private static BaseContextSummary loadDetailContext(AiContextType uicontext, Dictionary<TableID, long[]> context_reference)
		{
			switch (uicontext)
			{
				case AiContextType.CustomerDetail:
					var oids = context_reference[TableID.Customer];
					var dc = new CustomerServiceImp().LoadCustomer(oids[0]);
					return AiContextSummaryFactory.CreateCustomerDetailContextSummary(dc);
				case AiContextType.PersonDetail:
					var oids2 = context_reference[TableID.Person];
					var dc2 = new CustomerServiceImp().LoadPerson(oids2[0]);
					return AiContextSummaryFactory.CreatePersonDetailContextSummary(dc2);
				case AiContextType.EmployeeDetail:
					var oids3 = context_reference[TableID.Employee];
					var dc3 = new EmployeeServiceImp().LoadEmployee(oids3[0]);
					return AiContextSummaryFactory.CreateEmployeeDetailContextSummary(dc3);
				case AiContextType.OrganisationDetail:
					var oids4 = context_reference[TableID.Organisation];
					var dc4 = new CustomerServiceImp().LoadOrganisation(oids4[0]);
					return AiContextSummaryFactory.CreateOrganisationDetailContextSummary(dc4);
				case AiContextType.SupportConceptDetail:
					var oids5 = context_reference[TableID.SupportConcept];
					var dc5 = new CustomerServiceImp().LoadSupportConcept(oids5[0]);
					return AiContextSummaryFactory.CreateSupportConceptDetailContextSummary(dc5);
			}

			throw new NotImplementedException();
		}

		private static BaseContextSummary loadServiceRecordContext(Dictionary<TableID, long[]> context_reference)
		{
			var customer = loadCompactCustomerDC(context_reference);
			var serviceRecords = loadServiceRecordDCs(context_reference);
			var supportConcept = loadSupportConceptDC(context_reference);
			var costBearer = supportConcept.CostBearerList.First(x => x.CostBearerOid == context_reference[TableID.CostBearer][0]);

			return AiContextSummaryFactory.CreateServiceRecordNavigationContextSummary(serviceRecords, customer, costBearer, supportConcept);
		}

		private static bool oidsContainsOid(long[] oids, long oid)
		{
			if (oids == null || oids.Length == 0)
				return false;

			return oids.Contains(oid);
		}

		private static CompactCustomerDC loadCompactCustomerDC(Dictionary<TableID, long[]> context_reference)
			=> LoadDataContact<CompactCustomerDC_Customer, Customer, CompactCustomerDC>(MapperFactory.CompactCustomerDC_Customer, context_reference);
		private static CompactSupportConceptDC loadSupportConceptDC(Dictionary<TableID, long[]> context_reference)
			=> LoadDataContact<CompactSupportConceptDC_SupportConcept, SupportConcept, CompactSupportConceptDC>(MapperFactory.CompactSupportConceptDC_SupportConcept, context_reference);
		private static IEnumerable<ServiceRecordDC> loadServiceRecordDCs(Dictionary<TableID, long[]> context_reference)
			=> LoadDataContacts<ServiceRecordDC_ServiceRecord, ServiceRecord, ServiceRecordDC>(MapperFactory.ServiceRecordDC_ServiceRecord, context_reference);

		private static TDC LoadDataContact<TMapper, TEntity, TDC>(TMapper mapper, Dictionary<TableID, long[]> context_reference)
			where TMapper : AbstractIDCEntityMapper<TEntity, TDC>
			where TEntity : BeWoEntityBase, new()
			where TDC : class, new()
		{
			var example = new TEntity();
			var tid = example.Tid;
			var oid = context_reference[tid][0];
			var entity = DAOFactory.GenericDAO.LoadByID<TEntity>(oid);
			var dc = mapper.MapToNewDC(entity);
			return dc;
		}

		private static IEnumerable<TDC> LoadDataContacts<TMapper, TEntity, TDC>(TMapper mapper, Dictionary<TableID, long[]> context_reference)
			where TMapper : AbstractIDCEntityMapper<TEntity, TDC>
			where TEntity : BeWoEntityBase, new()
			where TDC : class, new()
		{
			var example = new TEntity();
			var tid = example.Tid;
			var oids = context_reference[tid];
			var entities = DAOFactory.GenericDAO.LoadByIDs<TEntity>(oids);
			var dcs = mapper.MapToNewDCs(entities);
			return dcs;
		}
	}
}