using System;
using System.Globalization;
using System.Linq;
using System.Web.Helpers;
using Step.Model.DatabaseModels;
using Step.Model.DTOModels;

namespace Step.Database.Controllers
{
    public class UsersController : IDisposable
    {
        private DatabaseContext dbCtx;

        public UsersController()
        {
            // Initialize database context
            dbCtx = new DatabaseContext();
        }

        public void Dispose()
        {
            // Clear database context
            dbCtx.Dispose();
        }

        public void Create(string username, string password, string firstName, string lastName, int roleId, CultureInfo language)
        {
            UserModel user = CreateUserModel(username, password, firstName, lastName, roleId, language);
            // Add to database
            dbCtx.Users.Add(user);
            // Commit changes
            dbCtx.SaveChanges();
        }

        public static UserModel CreateUserModel(int id, string username, string password, string firstName, string lastName, int roleId, CultureInfo language)
        {
            // Create a new user model with params
            return new UserModel()
            {
                UserId = id,
                Username = username,
                Password = Crypto.HashPassword(password),
                FirstName = firstName,
                LastName = lastName,
                RoleId = roleId,
                SecurityStamp = Guid.NewGuid().ToString(),
                Language = language
            };
        }
        public static UserModel CreateUserModel(string username, string password, string firstName, string lastName, int roleId, CultureInfo language)
        {
            return CreateUserModel(0, username, password, firstName, lastName, roleId, language);
        }

        public DTOUserModel GetUserInfo(int id)
        {
            // Find user by Id with Role object included
            UserModel userDatabaseModel = dbCtx.Users.Include("Role").Where(u => u.UserId == id).FirstOrDefault();

            return new DTOUserModel()
            {
                Id = userDatabaseModel.UserId,
                Username = userDatabaseModel.Username,
                FirstName = userDatabaseModel.FirstName,
                LastName = userDatabaseModel.LastName,
                Language = userDatabaseModel.Language,
                RoleId = userDatabaseModel.RoleId
            };
        }

        public UserModel FindById(int id)
        {
            // Find user by Id with Role object included
            return dbCtx.Users.Include("Role").Where(u => u.UserId == id).FirstOrDefault();
        }

        private UserModel FindByUsername(string username)
        {
            // Find user by Id with Role object included
            return dbCtx.Users.Include("Role").Where(u => u.Username == username).FirstOrDefault();
        }

        public UserModel FindByUsernameAndPassword(string username, string password)
        {
            // Find if username exists
            UserModel user = FindByUsername(username);

            if (user != null)
            {
                // Check if the passwords match
                if (Crypto.VerifyHashedPassword(user.Password, password) != true)
                {
                    return null;
                }
            }

            return user;
        }
    }
}