using ServiceStationContracts.BindingModels;
using ServiceStationContracts.SearchModels;
using ServiceStationContracts.ViewModels;
using ServiceStationDataModels;
using ServiceStationsContracts.StorageContracts;
using ServiceStationsDataBaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ServiceStationsDataBaseImplement.Implements
{
    public class ExecutorStorage : IExecutorStorage
    {
        public ExecutorViewModel? Delete(ExecutorBindingModel model)
        {
            using var context = new Database();
            var element = context.Executors.FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Executors.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }

        public ExecutorViewModel? GetElement(ExecutorSearchModel model)
        {
            if (string.IsNullOrEmpty(model.Email) && !model.Id.HasValue)
            {
                return null;
            }
            using var context = new Database();
            return context.Executors.FirstOrDefault(x =>
            (!string.IsNullOrEmpty(model.Email) && x.Email == model.Email ||
            (model.Id.HasValue && x.Id == model.Id)))?.GetViewModel;
        }

        public List<ExecutorViewModel> GetFilteredList(ExecutorSearchModel model)
        {
            if (string.IsNullOrEmpty(model.Email))
            {
                return new();
            }
            using var context = new Database();
            return context.Executors.Where(x => x.Email.Contains(model.Email)).Select(x => x.GetViewModel).ToList();
        }

        public List<ExecutorViewModel> GetFullList()
        {
            using var context = new Database();
            return context.Executors.Select(x => x.GetViewModel).ToList();
        }

        public ExecutorViewModel? Insert(ExecutorBindingModel model)
        {
            var newComponent = Executor.Create(model);
            if (newComponent == null)
            {
                return null;
            }
            using var context = new Database();
            context.Executors.Add(newComponent);
            context.SaveChanges();
            return newComponent.GetViewModel;
        }

        public ExecutorViewModel? Update(ExecutorBindingModel model)
        {
            using var context = new Database();
            var component = context.Executors.FirstOrDefault(x => x.Id == model.Id);
            if (component == null)
            {
                return null;
            }
            component.Update(model);
            context.SaveChanges();
            return component.GetViewModel;
        }
    }
}