using Contracts.BindingModels;
using Contracts.SearchModel;
using Contracts.Storage;
using Contracts.ViewModels;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DataBase.Implements
{
    public class RouteStorage : IRouteStorage
    {
        public List<RouteVM> GetFullList()
        {
            using var context = new LogisticContext();
            return context.Routes.FromSqlRaw("Select * From Route").Include(u => u.PlaceStartNavigation).Include(a => a.PlaceEndNavigation)
                    .ToList()
                    .Select(x => x.GetViewModel)
                    .ToList();
        }

        public List<RouteVM> GetFilteredList(RouteSM model)
        {
            if (!model.Length.HasValue && !model.Start.HasValue && !model.End.HasValue)
            {
                return new();
            }
            using var context = new LogisticContext();
            if(model.Length.HasValue)
            return context.Routes
                    .FromSqlRaw("Select * FROM Route WHERE Length <= {0}", model.Length).Include(u => u.PlaceStartNavigation).Include(a => a.PlaceEndNavigation)
                    .ToList()
                    .Select(x => x.GetViewModel)
                    .ToList();
            else if(model.Start.HasValue)
                return context.Routes
                    .FromSqlRaw("Select * FROM Route WHERE PlaceStart = {0} ", model.Start).Include(u => u.PlaceStartNavigation).Include(a => a.PlaceEndNavigation)
                    .ToList()
                    .Select(x => x.GetViewModel)
                    .ToList();
            return context.Routes
                   .FromSqlRaw("Select * FROM Route WHERE PlaceEnd = {0} ", model.End).Include(u => u.PlaceStartNavigation).Include(a => a.PlaceEndNavigation)
                   .ToList()
                   .Select(x => x.GetViewModel)
                   .ToList();
        }

        public RouteVM? GetElement(RouteSM model)
        {
            if (!model.Id.HasValue && !model.Start.HasValue && !model.End.HasValue)
            {
                return null;
            }
            using var context = new LogisticContext();
            var mid = context.Routes.FromSqlRaw("Select * from Route r where r.id = {0}", model.Id).Include(u => u.PlaceStartNavigation).Include(a => a.PlaceEndNavigation).ToList();
            
            if (mid.Count == 0)
                return null;
            var res =  mid[0]?.GetViewModel;
            return res;
        }

        public RouteVM? Insert(RouteBM model)
        {
            using var context = new LogisticContext();
            var newRoute = Route.Create(context, model);
            if (newRoute == null)
            {
                return null;
            }
            context.Routes.Add(newRoute);
            context.SaveChanges();
            return newRoute.GetViewModel;
        }

        public RouteVM? Update(RouteBM model)
        {
            using var context = new LogisticContext();
            using var transaction = context.Database.BeginTransaction();
            try
            {
                var route = context.Routes.FirstOrDefault(rec => rec.Id == model.Id);
                if (route == null)
                {
                    return null;
                }
                route.Update(model);
                context.SaveChanges();
                transaction.Commit();
                return route.GetViewModel;
            }
            catch
            {
                transaction.Rollback();
                throw;
            }
        }

        public RouteVM? Delete(RouteBM model)
        {
            using var context = new LogisticContext();
            var element = context.Routes
                .FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Routes.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}