using System;
using System.Collections.Generic;
using System.Linq;
using EnVisage.Models;

namespace EnVisage.Code.BLL
{
    public class ContactManager : ManagerBase<Contact, ContactModel>
    {
        public ContactManager(EnVisageEntities dbContext)
            : base(dbContext)
        {
        }

        protected override Contact InitInstance()
        {
            return new Contact { Id = Guid.NewGuid() };
        }

        protected override Contact RetrieveReadOnlyById(Guid key)
        {
            return DataTable.AsNoTracking().FirstOrDefault(t => t.Id == key);
        }

        public override System.Data.Entity.DbSet<Contact> DataTable
        {
            get
            {
                return DbContext.Contacts;
            }
        }

        public ContactModel LoadContactModel(Guid contactId)
        {
            if (contactId == Guid.Empty)
                return null;

            return ContactModelBasicQuery.FirstOrDefault(x => x.Id == contactId);
        }

        public List<ContactModel> GetContacts(Guid parentId)
        {
            if (parentId == Guid.Empty)
                return null;

            return ContactModelBasicQuery.Where(x => x.ParentId == parentId).ToList();
        }
        public ContactModel GetContactByName(string FirstName,string LastName, ContactType contactType)
        {
            return (ContactModel)ContactModelBasicQuery.FirstOrDefault(x => x.FirstName == FirstName && x.LastName == LastName && x.Type == contactType);
        }
        #region Private Members

        private IQueryable<ContactModel> ContactModelBasicQuery
        {
            get
            {
                var query = DataTable.AsNoTracking()
                                     .Select(x => 
                new ContactModel()
                {
                    Id = x.Id,
                    Type = (ContactType)x.Type,
                    FirstName = x.FirstName,
                    LastName = x.LastName,
                    Email = x.Email,
                    Phone = x.Phone,
                    ParentId = x.ParentId.HasValue ? x.ParentId.Value : Guid.Empty,
                    ProjectLinksCount = x.Contact2Project.Count,
                    ContactClassification = (InternalContactClassification)x.ContactClassification
                });

                return query;
            }
        }

        #endregion
    }
}