using System;
using System.Linq;
using System.Net;
using System.ServiceModel;
using System.ServiceModel.Activation;
using System.Web.Security;
using GeneralApi.Core.Repositories;
using GeneralApi.Core.Services;
using Microsoft.Practices.ServiceLocation;
using NHibernate.Validator.Engine;
using Taloyhtio.GeneralApi.Common;
using Taloyhtio.GeneralApi.Common.Extensions;
using Taloyhtio.GeneralApi.Core.Common;
using Taloyhtio.GeneralApi.Core.Entities;
using Taloyhtio.GeneralApi.Core.Services;
using WcfRestContrib.ServiceModel.Description;
using TaloyhtioIntegration_resx = Taloyhtio.GeneralApi.Resources.Resources.TaloyhtioIntegration;
using WebException = WcfRestContrib.ServiceModel.Web.Exceptions.WebException;


namespace Taloyhtio.GeneralApi.WcfService
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "TaloyhtioIntegration" in code, svc and config file together.
    // NOTE: In order to launch WCF Test Client for testing this service, please select TaloyhtioIntegration.svc or TaloyhtioIntegration.svc.cs at the Solution Explorer and start debugging.
     [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
    public class TaloyhtioIntegration : ITaloyhtioIntegration
    {
        public void SaveCondoInformation(Taloyhtio.GeneralApi.Common.DTO.Condo c)
        {
            var securityContext = this.ensureAuthorized();

            if (c == null)
            {
                throw new ArgumentNullException("condo");
            }

            // current assumption is that business id is login name
            //string businessIdPMC = HttpContext.Current.User.Identity.Name;
            string businessIdPMC = securityContext.PrimaryIdentity.Name;

            var condoRepository = ServiceLocator.Current.GetInstance<ICondoRepository>();
            var existingCondo = condoRepository.GetByBusinessId(c.BusinessId);
            if (existingCondo != null)
            {
                // pmc may update only their own condos
                if (existingCondo.BusinessIdPMC != businessIdPMC)
                {
                    throw new WebException(HttpStatusCode.Unauthorized, string.Format(TaloyhtioIntegration_resx.SecurityIncorrectBusinessIdPMC,
                                        businessIdPMC, existingCondo.BusinessId));
                }

                // we can't update properties of existing Condo before validation, because
                // if validation will fail, UnitOfWork will anyway Commit changes even despite of the fact
                // that condoRepository.Save(condo) was not called. See http://stackoverflow.com/questions/1380581/nhibernate-commit-db-changes-without-explict-call-to-save-or-update
                // for details. It happens because existingCondo is attached to session and there is no need to call
                // ISession.SaveOrUpdate()

                //                existingCondo.OfficialName = c.OfficialName;
                //                existingCondo.Address = c.Address;
                //                existingCondo.Postcode = c.Postcode;
                //                existingCondo.Town = c.Town;
                //                existingCondo.BuildingsType = c.BuildingsType;
                //                existingCondo.BuildingsNumber = c.BuildingsNumber;
                //                existingCondo.StaircasesNumber = c.StaircasesNumber;
                //                existingCondo.BuildingYear = c.BuildingYear;
                //                existingCondo.LastUpdated = DateTime.Now;
            }

            //            var condo =
            //                new Condo
            //                {
            //                    BusinessId = c.BusinessId,
            //                    BusinessIdPMC = businessIdPMC,
            //                    OfficialName = c.OfficialName,
            //                    Address = c.Address,
            //                    Postcode = c.Postcode,
            //                    Town = c.Town,
            //                    BuildingsType = c.BuildingsType,
            //                    BuildingsNumber = c.BuildingsNumber,
            //                    StaircasesNumber = c.StaircasesNumber,
            //                    BuildingYear = c.BuildingYear,
            //                    LastUpdated = DateTime.Now
            //                };

            var mapper = ServiceLocator.Current.GetInstance<IMapper<Taloyhtio.GeneralApi.Common.DTO.Condo, Condo>>();
            var condo = mapper.Map(c);
            // the following properties are not comming from client. They are ignored in AutoMapper
            // profile configuration (see DtoProfile) and should be set manually
            condo.BusinessIdPMC = businessIdPMC;
            condo.LastUpdated = DateTime.Now;

            var validator = ServiceLocator.Current.GetInstance<ValidatorEngine>();
            var errors = validator.Validate(condo);
            if (!errors.IsNullOrEmpty())
            {
                //                var fault = new CustomFaultException
                //                                {Reason = string.Join("\n", errors.Select(e => e.ToString()).ToArray())};
                //                throw new FaultException<CustomFaultException>(fault);
                throw new Exception(string.Join("\n", errors.Select(e => e.ToString()).ToArray()));
            }

            //bool statusChanged = false;

            if (existingCondo != null)
            {
                existingCondo.OfficialName = condo.OfficialName;
                existingCondo.Address = condo.Address;
                existingCondo.Postcode = condo.Postcode;
                existingCondo.Town = condo.Town;
                existingCondo.BuildingsType = condo.BuildingsType;
                existingCondo.BuildingsNumber = condo.BuildingsNumber;
                existingCondo.StaircasesNumber = condo.StaircasesNumber;
                existingCondo.BuildingYear = condo.BuildingYear;
                existingCondo.LastUpdated = condo.LastUpdated;

                //statusChanged = (existingCondo.Deactivated != condo.Deactivated);
                existingCondo.Deactivated = condo.Deactivated;

                // for existing Condo it is not necessary to call ISession.SaveOrUpdate() because it is
                // already attached to the session. See http://stackoverflow.com/questions/1380581/nhibernate-commit-db-changes-without-explict-call-to-save-or-update
                condo = existingCondo;
            }

            condoRepository.Save(condo);

            //            if (statusChanged)
            //            {
            //                this.sendEmailStatusChanged(condo,
            //                    Core.Common.Constants.TemplateParams.CONDO,
            //                    Core.Common.Constants.SettingsKeys.KEY_EMAIL_CONDO_STATUS_CHANGED_SUBJECT,
            //                    Core.Common.Constants.SettingsKeys.KEY_EMAIL_CONDO_STATUS_CHANGED_BODY_TEMPLATE);
            //            }
        }

        public void SaveBoardMemberInformation(Taloyhtio.GeneralApi.Common.DTO.BoardMember b)
        {
            var securityContext = this.ensureAuthorized();

            if (b == null)
            {
                throw new ArgumentNullException("boardMember");
            }

            // current assumption is that business id is login name
            //string businessIdPMC = HttpContext.Current.User.Identity.Name;
            string businessIdPMC = securityContext.PrimaryIdentity.Name;

            var boardMembersRepository = ServiceLocator.Current.GetInstance<IBoardMemberRepository>();
            var existingBoardMember = boardMembersRepository.GetBy(b.FirstName, b.LastName, b.CondoName);
            if (existingBoardMember != null)
            {
                // pmc may update only board members of their own condos
                if (existingBoardMember.Condo.BusinessIdPMC != businessIdPMC)
                {
                    throw new WebException(HttpStatusCode.Unauthorized,
                                           string.Format(TaloyhtioIntegration_resx.SecurityIncorrectBusinessIdPMC,
                                                         businessIdPMC, existingBoardMember.Condo.BusinessId));
                }
            }

            // construct board member entity from dto object for validation and saving
            var mapper = ServiceLocator.Current.GetInstance<IMapper<Taloyhtio.GeneralApi.Common.DTO.BoardMember, BoardMember>>();
            var boardMember = mapper.Map(b);
            boardMember.LastUpdated = DateTime.Now;
            if (existingBoardMember != null)
            {
                boardMember.Condo = existingBoardMember.Condo;
            }
            else
            {
                var condoRepository = ServiceLocator.Current.GetInstance<ICondoRepository>();
                boardMember.Condo = condoRepository.GetByOfficialName(b.CondoName);
            }

            var validator = ServiceLocator.Current.GetInstance<ValidatorEngine>();
            var errors = validator.Validate(boardMember);
            if (!errors.IsNullOrEmpty())
            {
                throw new Exception(string.Join("\n", errors.Select(e => e.ToString()).ToArray()));
            }

            bool statusChanged = false;
            bool newBoardMember = existingBoardMember == null;

            if (existingBoardMember != null)
            {
                existingBoardMember.Address = boardMember.Address;
                existingBoardMember.Postcode = boardMember.Postcode;
                existingBoardMember.Town = boardMember.Town;
                existingBoardMember.FlatNumber = boardMember.FlatNumber;
                existingBoardMember.Email = boardMember.Email;
                existingBoardMember.Mobile = boardMember.Mobile;
                existingBoardMember.LastUpdated = boardMember.LastUpdated;

                statusChanged = (existingBoardMember.Deactivated != boardMember.Deactivated);
                existingBoardMember.Deactivated = boardMember.Deactivated;

                // for existing Condo it is not necessary to call ISession.SaveOrUpdate() because it is
                // already attached to the session. See http://stackoverflow.com/questions/1380581/nhibernate-commit-db-changes-without-explict-call-to-save-or-update

                boardMember = existingBoardMember;
            }

            boardMembersRepository.Save(boardMember);

            if (newBoardMember)
            {
                this.sendEmailStatusChanged(boardMember,
                    Taloyhtio.GeneralApi.Core.Common.Constants.TemplateParams.BOARD_MEMBER,
                    Taloyhtio.GeneralApi.Core.Common.Constants.SettingsKeys.KEY_EMAIL_BOARD_MEMBER_NEW_SUBJECT,
                    Taloyhtio.GeneralApi.Core.Common.Constants.SettingsKeys.KEY_EMAIL_BOARD_MEMBER_NEW_BODY_TEMPLATE);
            }
            else if (statusChanged)
            {
                this.sendEmailStatusChanged(boardMember,
                    Taloyhtio.GeneralApi.Core.Common.Constants.TemplateParams.BOARD_MEMBER,
                    Taloyhtio.GeneralApi.Core.Common.Constants.SettingsKeys.KEY_EMAIL_BOARD_MEMBER_STATUS_CHANGED_SUBJECT,
                    Taloyhtio.GeneralApi.Core.Common.Constants.SettingsKeys.KEY_EMAIL_BOARD_MEMBER_STATUS_CHANGED_BODY_TEMPLATE);
            }
        }

        private void sendEmailStatusChanged<T>(T item, string templateParam, string subjKey, string bodyTemplateKey)
        {
            try
            {
                var settingsProvider = ServiceLocator.Current.GetInstance<ISettingsProvider>();
                string to = settingsProvider.Get<string>(Taloyhtio.GeneralApi.Core.Common.Constants.SettingsKeys.KEY_EMAIL_TO);
                string subj = settingsProvider.Get<string>(subjKey);
                string bodyTemplate = settingsProvider.Get<string>(bodyTemplateKey);

                var templateEngine = ServiceLocator.Current.GetInstance<ITemplateEngine>();
                //var propertyExtractor = ServiceLocator.Current.GetInstance<IPropertyExtractor>();
                string body = templateEngine.Merge(bodyTemplate, new Pair<string, object>(templateParam, item));
                body = body.Replace("\\n", "\n");

                var emailService = ServiceLocator.Current.GetInstance<IEmailService>();
                emailService.Send(to, subj, body);
            }
            catch (Exception x)
            {
                var logger = ServiceLocator.Current.GetInstance<ILogger>();
                logger.LogError("sendEmailCondoStatusChanged:\n{0}\n{1}", x.Message, x.StackTrace);
            }
        }

        private ServiceSecurityContext ensureAuthorized()
        {
            var securityContext = OperationContext.Current.ServiceSecurityContext;
            if (securityContext == null || securityContext.IsAnonymous)
            {
                throw new WebException(HttpStatusCode.Unauthorized,
                                       TaloyhtioIntegration_resx.SecurityNotAuthorized);
            }
            return securityContext;
        }
    }
}