using BeautySaloonContracts.BindingModels;
using BeautySaloonContracts.SearchModels;
using BeautySaloonContracts.StoragesContracts;
using BeautySaloonContracts.ViewModels;
using Microsoft.EntityFrameworkCore;

namespace BeautySaloonDatabaseImplement.Implements
{
    public class EmployeeStorage : IEmployeeStorage
    {
        public EmployeeViewModel? Delete(EmployeeBindingModel model)
        {
            using var context = new NewdbContext();
            var element = context.Employees
                .Include(x => x.Position)
                .FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Employees.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }

        public EmployeeViewModel? GetElement(EmployeeSearchModel model)
        {
            using var context = new NewdbContext();
            if (model.Id.HasValue)
                return context.Employees
                    .Include(x => x.Position)
                    .FirstOrDefault(x => x.Id == model.Id)?
                    .GetViewModel;
            if (!string.IsNullOrEmpty(model.Phone))
                return context.Employees
                    .Include(x => x.Position)
                    .FirstOrDefault(x => x.Phone.Equals(model.Phone))?
                    .GetViewModel;
            return null;
        }

        public List<EmployeeViewModel> GetFilteredList(EmployeeSearchModel model)
        {
            using var context = new NewdbContext();
            if (string.IsNullOrEmpty(model.Surname) && !model.Id.HasValue)
            {
                return new();
            }
            if (model.Id.HasValue)
                return context.Employees
                    .Include(x => x.Position)
                    .Where(x => x.Id.Equals(model.Id))
                    .Select(x => x.GetViewModel)
                    .ToList();
            return context.Employees
                .Include(x => x.Position)
                .Where(x => x.Surname.Contains(model.Surname))
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public List<EmployeeViewModel> GetFullList()
        {
            using var context = new NewdbContext();
            return context.Employees
                .Include(x => x.Position)
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public EmployeeViewModel? Insert(EmployeeBindingModel model)
        {
            using var context = new NewdbContext();
            model.Id = context.Employees.Count() > 0 ? context.Employees.Max(x => x.Id) + 1 : 1;
            var newEmployee = Employee.Create(model);
            if (newEmployee == null)
            {
                return null;
            }
            context.Employees.Add(newEmployee);
            context.SaveChanges();
            return context.Employees
                .Include(x => x.Position)
                .FirstOrDefault(x => x.Id == newEmployee.Id)?
                .GetViewModel;
        }

        public EmployeeViewModel? Update(EmployeeBindingModel model)
        {
            using var context = new NewdbContext();
            var client = context.Employees
                .Include(x => x.Position)
                .FirstOrDefault(x => x.Id == model.Id);
            if (client == null)
            {
                return null;
            }
            client.Update(model);
            context.SaveChanges();
            return context.Employees
                .Include(x => x.Position)
                .FirstOrDefault(x => x.Id == client.Id)?
                .GetViewModel;
        }
    }
}