using BeautySalonContracts.BindingModels;
using BeautySalonContracts.SearchModels;
using BeautySalonContracts.StoragesContracts;
using BeautySalonContracts.ViewModels;
using BeautySalonDatabaseImplement.Models;
using Microsoft.EntityFrameworkCore;

namespace BeautySalonDatabaseImplement.Implements
{
    public class MasterStorage : IMasterStorage
    {
        public List<MasterViewModel> GetFullList()
        {
            using var context = new BeautySalonDatabase();
            return context.Masters
             .Include(x => x.Services)
            .ThenInclude(x => x.Service)
            .ToList()
            .Select(x => x.GetViewModel)
            .ToList();
        }
        public List<MasterViewModel> GetFilteredList(MasterSearchModel model)
        {
            if (string.IsNullOrEmpty(model.MasterFIO))
            {
                return new();
            }
            using var context = new BeautySalonDatabase();
            return context.Masters
             .Include(x => x.Services)
            .ThenInclude(x => x.Service)
            .Where(x => x.MasterFIO.Contains(model.MasterFIO))
            .ToList()
            .Select(x => x.GetViewModel)
            .ToList();
        }
        public MasterViewModel? GetElement(MasterSearchModel model)
        {
            if (string.IsNullOrEmpty(model.MasterFIO) &&
            !model.Id.HasValue)
            {
                return null;
            }
            using var context = new BeautySalonDatabase();
            return context.Masters
             .Include(x => x.Services)
             .ThenInclude(x => x.Service)
             .FirstOrDefault(x => (!string.IsNullOrEmpty(model.MasterFIO) &&
            x.MasterFIO == model.MasterFIO) ||
            (model.Id.HasValue && x.Id == model.Id))
            ?.GetViewModel;
        }
        public MasterViewModel? Insert(MasterBindingModel model)
        {
            using var context = new BeautySalonDatabase();
            var newMaster = Master.Create(context, model);
            if (newMaster == null)
            {
                return null;
            }
            context.Masters.Add(newMaster);
            context.SaveChanges();
            return newMaster.GetViewModel;
        }
        public MasterViewModel? Update(MasterBindingModel model)
        {
            using var context = new BeautySalonDatabase();
            using var transaction = context.Database.BeginTransaction();
            try
            {
                var engine = context.Masters.FirstOrDefault(rec =>
                rec.Id == model.Id);
                if (engine == null)
                {
                    return null;
                }
                engine.Update(model);
                context.SaveChanges();
                engine.UpdateServices(context, model);
                transaction.Commit();
                return engine.GetViewModel;
            }
            catch
            {
                transaction.Rollback();
                throw;
            }
        }
        public MasterViewModel? Delete(MasterBindingModel model)
        {
            using var context = new BeautySalonDatabase();
            var element = context.Masters
            .Include(x => x.Services)
            .FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Masters.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}