using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using LawFirmContracts.BindingModels;
using LawFirmContracts.Models;
using LawFirmContracts.SearchModels;
using LawFirmContracts.StorageContracts;
using LawFirmContracts.ViewModels;
using LawFirmDatabase.Models;
using Microsoft.EntityFrameworkCore;

namespace LawFirmDatabase.Implements
{
    public class ItemStorage : IItemStorage
    {
        public List<ItemViewModel> GetFullList()
        {
            using var context = new LawFirmDBContext();
            return context.Items.Include(x => x.Services).Select(x => x.GetViewModel).ToList();
        }
        public List<ItemViewModel> GetFilteredList(ItemSearchModel model)
        {
            using var context = new LawFirmDBContext();
            return context.Items.Where(x => x.Id == model.Id).Include(x => x.Services).Select(x => x.GetViewModel).ToList();
        }
        public ItemViewModel? GetElement(ItemSearchModel model)
        {
            if (model == null)
            {
                return null;
            }
            using var context = new LawFirmDBContext();
            if (model.Id.HasValue)
            {
                return context.Items.Include(x => x.Services).FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
            }
            if (!string.IsNullOrEmpty(model.Name))
            {
                return context.Items.Include(x => x.Services).FirstOrDefault(x => x.Name == model.Name)?.GetViewModel;
            }
            return null;
        }
        public ItemViewModel? Insert(ItemBindingModel model)
        {
            using var context = new LawFirmDBContext();
            var newItem = Item.Create(context, model);
            if (newItem != null)
            {
                context.Items.Add(newItem);
                context.SaveChanges();
                return newItem.GetViewModel;
            }
            return null;
        }
        public ItemViewModel? Update(ItemBindingModel model)
        {
            using var context = new LawFirmDBContext();
            var item = context.Items.FirstOrDefault(x => x.Id == model.Id);
            if (item == null)
            {
                return null;
            }
            item.Update(context, model);
            context.SaveChanges();
            return item.GetViewModel;
        }
        public ItemViewModel? Delete(ItemBindingModel model)
        {
            using var context = new LawFirmDBContext();
            var item = context.Items.FirstOrDefault(x => x.Id == model.Id);
            if (item == null)
            {
                return null;
            }
            context.Items.Remove(item);
            context.SaveChanges();
            return item.GetViewModel;
        }
    }
}