using Microsoft.EntityFrameworkCore;
using ProRestaurant.Classes;
using ProRestaurant.Containers;
using ProRestaurant.DBContexts;
using ProRestaurant.Models.Restaurants;
using System;
using System.Collections.Generic;
using System.Linq;

namespace ProRestaurant.Repository.Restaurants
{
    public class MenuOptionRepository : IMenuOptionRepository
    {
        private readonly DBContext dBContext;

        public MenuOptionRepository(DBContext _dBContext)
        {
            dBContext = _dBContext;
        }

        public void Delete(MenuOption Option)
        {
            if (Option.Options != null)
            {
                foreach (var item in Option.Options)
                {
                    DeleteItem(item);
                }
            }

            dBContext.MenuOptions.Remove(Option);
            Save();
        }

        public void DeleteItem(int id)
        {
            var item = dBContext.MenuOptionItems.Where(i => i.Id == id).FirstOrDefault();
            dBContext.MenuOptionItems.Remove(item);
            Save();
        }

        public void DeleteItem(MenuOptionItem item)
        {
            dBContext.MenuOptionItems.Remove(item);
            Save();
        }

        public MenuOption GetMenuOption(int id)
        {
            var option = dBContext.MenuOptions.Where(m => m.Id == id).FirstOrDefault();

            if (option == null)
            {
                option = new MenuOption()
                {
                    OptionType = OptionType.Single,
                    IsBasePrice = false,
                    Options = new List<MenuOptionItem>(),
                    CategoryDescription = "All"
                };
            }
            else
            {
                option.Options = dBContext.MenuOptionItems.Where(m => m.MenuOption == option).ToList();
                if (option.CategoryId > 0)
                    option.CategoryDescription = dBContext.MenuCategories.Where(m => m.Id == option.CategoryId).FirstOrDefault().Description;
                else
                    option.CategoryDescription = "All";
            }

            return option;
        }

        public List<OptionTypeContainer> GetOptionTypes()
        {
            //TODO: hard coded for now, will need to find solution.
            var options = new List<OptionTypeContainer>
            {
                new OptionTypeContainer() { Id = 0, Description = "Single" },
                new OptionTypeContainer() { Id = 1, Description = "Single Required" },
                new OptionTypeContainer() { Id = 2, Description = "Multiple" },
                new OptionTypeContainer() { Id = 3, Description = "Multiple Limit" }
            };

            return options;
        }

        public List<MenuOption> GetRestaurantMenuOptions(int restaurantId)
        {
            var options = (from o in dBContext.MenuOptions                           
                           where o.RestaurantId == restaurantId
                           orderby o.Rank
                           select o).ToList();

            foreach (var option in options)
            {
                switch (option.OptionType)
                {
                    case OptionType.MultipleLimit:
                        option.OptionTypeDescription = "Multiple Limit";
                        break;
                    case OptionType.SingleRequired:
                        option.OptionTypeDescription = "Single Required";
                        break;
                    default:
                        option.OptionTypeDescription = option.OptionType.ToString();
                        break;
                }

                if (option.CategoryId > 0)
                    option.CategoryDescription = dBContext.MenuCategories.Where(m => m.Id == option.CategoryId).FirstOrDefault().Description;
                else
                    option.CategoryDescription = "All";
            }

            return options;
        }

        public void Insert(MenuOption Option)
        {
            dBContext.Add(Option);
            Save();
        }

        public void Save()
        {
            dBContext.SaveChanges();
        }

        public void Update(MenuOption Option)
        {
            dBContext.Entry(Option).State = EntityState.Modified;
            foreach (var opt in Option.Options)
            {
                if (opt.Id > 0)
                {
                    dBContext.Entry(opt).State = EntityState.Modified;
                }
                else
                {
                    dBContext.Add(opt);
                }
            }

            Save();
        }
    }
}