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;
using DevExpress.DataAccess.Native.Sql;
using BS.Shared.Exceptions;
using BS.Shared.DataContracts.Feature.AI;

namespace BeWo.Service.ServiceUtils
{
	public static class AiContextLoader
	{
		public static BaseContextSummary LoadContext(AiActionType actionType, AiViewContextDC view_context, int? sample_count = null)
		{
			switch (actionType)
			{
				case AiActionType.ServiceRecord:
					break;
				case AiActionType.ServiceRecordConversation:
					return loadServiceRecordConversationContext(view_context.References, sample_count);
				case AiActionType.ServiceRecordDocumentation:
					return loadServiceRecordDocumentationContext(view_context.References, view_context.Secondary as string, sample_count);
				default:
					break;
			}

			throw BeWoNotImplementedException.CreateFromEnum(actionType);
		}

		private static BaseContextSummary loadNavigationContext(AiActionType actionType, Dictionary<TableID, long[]> context_reference)
		{
			switch (actionType)
			{
				//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 BeWoNotImplementedException.CreateFromEnum(actionType);
		}

		private static BaseContextSummary loadDetailContext(AiActionType actionType, Dictionary<TableID, long[]> context_reference)
		{
			switch (actionType)
			{
				//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 BeWoNotImplementedException.CreateFromEnum(actionType);
		}

		private static BaseContextSummary loadServiceRecordConversationContext(Dictionary<TableID, long[]> context_reference, int? sample_count = null)
		{
			var customer = loadCompactCustomerDC(context_reference);
			var serviceRecords = loadServiceRecordDCs(context_reference, sample_count);
			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 BaseContextSummary loadServiceRecordDocumentationContext(Dictionary<TableID, long[]> context_reference, string doku_text, int? sample_count = null)
		{
			var customer = loadCompactCustomerDC(context_reference);
			var serviceRecords = loadServiceRecordDCs(context_reference, sample_count);
			var supportConcept = loadSupportConceptDC(context_reference);
			var costBearer = supportConcept.CostBearerList.First(x => x.CostBearerOid == context_reference[TableID.CostBearer][0]);

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

		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, int? sample_count = null)
			=> LoadDataContacts<ServiceRecordDC_ServiceRecord, ServiceRecord, ServiceRecordDC>(MapperFactory.ServiceRecordDC_ServiceRecord, context_reference, sample_count);

		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, int? sample_count = null)
			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];

			if (sample_count is int count)
				oids = context_reference[tid].Take(count).ToArray();

			var entities = DAOFactory.GenericDAO.LoadByIDs<TEntity>(oids);
			var dcs = mapper.MapToNewDCs(entities);

			return dcs;
		}
	}
}