using HotelContracts.BindingModels;
using HotelContracts.SearchModels;
using HotelContracts.StoragesContracts;
using HotelContracts.ViewModels;
using HotelDatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HotelDatabaseImplement.Implements
{
    public class WorkerStorage : IWorkerStorage
    {
        public WorkerViewModel? Delete(WorkerBindingModel model)
        {
            using var context = new HotelDatabase();
            var element = context.Workers.FirstOrDefault(x => x.Id == model.Id);
            if (element != null)
            {
                context.Workers.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }

        public WorkerViewModel? GetElement(WorkerSearchModel model)
        {
            if (string.IsNullOrEmpty(model.FIO) && !model.Id.HasValue)
            {
                return null;
            }
            using var context = new HotelDatabase();
            return context.Workers.FirstOrDefault(x => (!string.IsNullOrEmpty(model.FIO)) && x.FIO == model.FIO || model.Id.HasValue && x.Id == model.Id)?.GetViewModel;
        }

        public List<WorkerViewModel> GetFilteredList(WorkerSearchModel model)
        {
            if (string.IsNullOrEmpty(model.FIO))
            {
                return new();
            }
            using var context = new HotelDatabase();
            return context.Workers.Where(x => x.FIO.Contains(model.FIO)).Select(x => x.GetViewModel).ToList();
        }

        public List<WorkerViewModel> GetFullList()
        {
            using var context = new HotelDatabase();
            return context.Workers.Select(x => x.GetViewModel).ToList();
        }

        public WorkerViewModel? Insert(WorkerBindingModel model)
        {
            var newWorker = Worker.Create(model);
            if (newWorker == null)
            {
                return null;
            }
            using var context = new HotelDatabase();
            context.Workers.Add(newWorker);
            context.SaveChanges();
            return newWorker.GetViewModel;
        }

        public WorkerViewModel? Update(WorkerBindingModel model)
        {
            using var context = new HotelDatabase();
            var component = context.Workers.FirstOrDefault(x => x.Id == model.Id);
            if (component == null)
            {
                return null;
            }
            component.Update(model);
            context.SaveChanges();
            return component.GetViewModel;
        }
    }
}