using DeviceContracts.BindingModels;
using DeviceContracts.SearchModels;
using DeviceContracts.StoragesContracts;
using DeviceContracts.ViewModels;
using DeviceDatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DeviceDatabaseImplement.Implements
{
    public class ServiceStorage : IServiceStorage
    {
        public List<ServiceViewModel> GetFullList()
        {
            using var context = new DeviceDatabase();
            return context.Services.Select(x => x.GetViewModel).ToList();
        }
        public List<ServiceViewModel> GetFilteredList(ServiceSearchModel model)
        {
            if (string.IsNullOrEmpty(model.Description) &&
                model.StartDate == null &&
                model.EndDate == null &&
                model.DeviceId == 0)
            {
                return new();
            }
            using var context = new DeviceDatabase();
            return context.Services
                .Where(x => (string.IsNullOrEmpty(model.Description) || 
                x.Description == model.Description) && 
                (model.StartDate == null || x.StartDate == model.StartDate) 
                && (model.EndDate == null || x.EndDate == model.EndDate) && 
                (model.DeviceId == 0 || x.DeviceId == model.DeviceId))
                .Select(x => x.GetViewModel).ToList();
        }
        public ServiceViewModel? GetElement(ServiceSearchModel model)
        {
            if (string.IsNullOrEmpty(model.Description) &&
                model.StartDate == null &&
                model.EndDate == null &&
                model.DeviceId == 0)
            {
                return null;
            }
            using var context = new DeviceDatabase();
            return context.Services
                .FirstOrDefault(x => (string.IsNullOrEmpty(model.Description)
                || x.Description == model.Description) && 
                (model.StartDate == null || x.StartDate == model.StartDate) && 
                (model.EndDate == null || x.EndDate == model.EndDate) && 
                (model.DeviceId == 0 || x.DeviceId == model.DeviceId))
                ?.GetViewModel;
        }
        public ServiceViewModel? Insert(ServiceBindingModel model)
        {
            var newService = Service.Create(model);
            if (newService == null)
            {
                return null;
            }
            using var context = new DeviceDatabase();
            context.Services.Add(newService);
            context.SaveChanges();
            return newService.GetViewModel;
        }
        public ServiceViewModel? Update(ServiceBindingModel model)
        {
            using var context = new DeviceDatabase();
            var service = context.Services
                .FirstOrDefault(x => x.Id == model.Id);
            if (service == null)
            {
                return null;
            }
            service.Update(model);
            context.SaveChanges();
            return service.GetViewModel;
        }
        public ServiceViewModel? Delete(ServiceBindingModel model)
        {
            using var context = new DeviceDatabase();
            var element = context.Services
                .FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Services.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}