using EPAServeur.Context;
using EPAServeur.Exceptions;
using EPAServeur.IServices;
using EPAServeur.Models.EP;
using IO.Swagger.DTO;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace EPAServeur.Services
{
	public class EpDetailsService : IEpDetailsService
	{
		private EpContext context;
		private ITransformDTO transformDTO;
		private ICollaborateurService collaborateurService;

		public EpDetailsService(EpContext context, ITransformDTO transformDTO, ICollaborateurService collaborateurService)
		{
			this.context = context;
			this.transformDTO = transformDTO;
			this.collaborateurService = collaborateurService;
		}

		public async Task<EpDTO> GetEp(long? id)
		{
			Ep ep = await context.Ep
				.Include(ep => ep.Engagements)
				.Include(ep => ep.Participants)
				.Include(ep => ep.CommentairesAssistant)
				.Include(ep => ep.DemandeDelegation)
				.Include(ep => ep.RdvEntretien).ThenInclude(rdv => rdv.TypeEntretien)
				.Include(ep => ep.PropositionsRDV).ThenInclude(rdv => rdv.TypeEntretien)
				.Include(ep => ep.ChoixTypeEntretien).ThenInclude( c => c.TypeEntretien)
				.Include(ep => ep.Objectifs)
				.Include(ep => ep.ObjectifsPrecedents)
				.Include(ep => ep.DemandeEPI)
				.FirstOrDefaultAsync(ep => ep.IdEP.Equals(id));
			if (ep == null)
				throw new EpNotFoundException();

			//ajouter tous les guids liés à  l'EP et aux attributs de l'EP
			List<Guid?> guids = new List<Guid?>
			{
				ep.IdCollaborateur
			};
			if (ep.IdReferent.HasValue)
				guids.Add(ep.IdCollaborateur);
			if (ep.Participants != null && ep.Participants.Any())
				guids.AddRange(ep.Participants.SelectMany(p => new[] { (Guid?)p.IdParticipant }));
			if (ep.CommentairesAssistant != null && ep.CommentairesAssistant.Any())
				guids.AddRange(ep.CommentairesAssistant.SelectMany(p => new[] { (Guid?)p.IdAssistant }));
			if (ep.DemandeDelegation != null)
				guids.Add(ep.DemandeDelegation.IdReferent);
			if (ep.DemandeEPI != null && ep.DemandeEPI.IdReferent != null)
				guids.Add(ep.DemandeEPI.IdReferent);

			IEnumerable<CollaborateurDTO> collaborateurDTOs = await collaborateurService.GetCollaborateurDTOsAsync(guids);
			
			EpDTO epDTO = transformDTO.EpToEpDetails(ep, collaborateurDTOs);
			
			return epDTO;
		}

		public void RappelSignature(long? idEp)
		{
			throw new NotImplementedException();
		}

		public Task<EpDTO> SaisirEPCollaborateur(Guid? idCollaborateur)
		{
			throw new NotImplementedException();
		}

		public Task<EpDTO> SaisirEPReferent(long? idEp)
		{
			throw new NotImplementedException();
		}

		public void SupprimerDonneesEPCollaborateur(Guid? idCollaborateur)
		{
			throw new NotImplementedException();
		}

		public void SupprimerEP(long? idEp)
		{
			throw new NotImplementedException();
		}

		public Task<EpDTO> UpdateEP(long? idEp, EpDTO ep)
		{
			throw new NotImplementedException();
		}

		public Task<EpDTO> UpdateSaisie(long? idEp, EpDTO ep)
		{
			throw new NotImplementedException();
		}
	}
}