using Microsoft.EntityFrameworkCore;
using ProRestaurant.Classes;
using ProRestaurant.DBContexts;
using ProRestaurant.Models.Accounts;
using ProRestaurant.Models.Restaurants;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography.Xml;

namespace ProRestaurant.Repository.Restaurants
{
    public interface IRestaurantUserRepository
    {
        List<User> GetUsers(int RestaurantId);
        RestaurantUser GetRestaurantUser(int UserId);
        void InsertUser(RestaurantUser User);
        void UpdateUser(RestaurantUser User);
        void RemoveUser(int id);
        void Save();
    }

    public class RestaurantUserRepository : IRestaurantUserRepository
    {
        private readonly DBContext dBContext;

        public RestaurantUserRepository(DBContext db)
        {
            dBContext = db;
        }

        public RestaurantUser GetRestaurantUser(int UserId)
        {
            var restUser = dBContext.RestaurantUsers.Include("User").Where(r => r.UserId == UserId).FirstOrDefault();

            if (restUser == null)
            {
                restUser = new RestaurantUser
                {
                    User = new User()
                    {
                        Id = 0,
                        EmailAddress = "",
                        FirstName = "",
                        Surname = "",
                        Cellphone = ""
                    }
                };
            }

            return restUser;
        }

        public List<User> GetUsers(int RestaurantId)
        {
            var users = dBContext.RestaurantUsers.Include("User").Where(r => r.RestaurantId == RestaurantId).Select(r => r.User).ToList();
            return users;
        }

        public void InsertUser(RestaurantUser User)
        {
            dBContext.Add(User);

            string password = CommonFunctions.GenerateRandomPassword();

            User.User.Password = CommonFunctions.GetHashSHA256(password + "≡∆≤≥√∞ProVision");
            User.User.ChangePassword = true;
            User.User.SystemRole = SystemRole.RestaurantUser;

            //TODO: Email generated password to the email address

            Save();
        }

        public void RemoveUser(int id)
        {
            var user = dBContext.Users.Where(u => u.Id == id).FirstOrDefault();
            var rUser = dBContext.RestaurantUsers.Where(r => r.UserId == user.Id).FirstOrDefault();

            dBContext.Users.Remove(user);
            dBContext.RestaurantUsers.Remove(rUser);
            Save();
        }

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

        public void UpdateUser(RestaurantUser User)
        {
            dBContext.Entry(User.User).State = EntityState.Modified;
            Save();
        }
    }
}