using System.Threading;
using System.Threading.Tasks;
using BlueWest.Cryptography;
using Microsoft.AspNetCore.Identity;

namespace BlueWest.WebApi.Context.Users;

internal class AuthManager : IAuthManager
{
        private readonly IUserManager _userManager;
        private readonly UserRepository _usersRepo;
        private readonly IHasher _hasher;
        private readonly IJwtFactory _jwtFactory;
        
        /// <summary>
        /// Auth manager constructor
        /// </summary>
        /// <param name="userManager"></param>
        /// <param name="hasher"></param>
        /// <param name="usersRepo"></param>
        /// <param name="jwtFactory"></param>
        public AuthManager(IUserManager userManager, IHasher hasher, UserRepository usersRepo, IJwtFactory jwtFactory)
        {
            _userManager = userManager;
            _hasher = hasher;
            _usersRepo = usersRepo;
            _jwtFactory = jwtFactory;
        }
        
        /// <inheritdoc />
        public async Task<AccessToken> GetToken(LoginViewModel loginViewModel)
        {
            if (!string.IsNullOrEmpty(loginViewModel.Email) && !string.IsNullOrEmpty(loginViewModel.Password))
            {
                var user = await _userManager.FindByEmailAsync(loginViewModel.Email);
                if (user != null)
                {
                    if (await VerifyLoginAsync(loginViewModel.Email,loginViewModel.Password))
                    {
                        // Todo generate refresh token
                        // Todo Add refresh token
                        await _usersRepo.UpdateAsync(user, CancellationToken.None);
                        var token = await _jwtFactory.GenerateEncodedToken(user.Id.ToString(), user.UserName);
                       // await _userManager.SetAuthenticationTokenAsync(user, "Income", "ApiUser", token.Token);

                        return token;
                    }
                }
            }

            return null;
        }
        
        /// <inheritdoc />
        public async Task<bool> VerifyLoginAsync(string email, string password)
        {
            var user = await _userManager.FindByEmailAsync(email);

            if (user == null)
            {
                return false; // return error user doesn't exist
            }

            return await _userManager.CheckPasswordAsync(user, password);
            
            // return await GenerateAuthenticationResultForUserAsync(user);
        }

        private  RegisterViewModel FromSignupToUser(RegisterViewModel signupDto)
        {
            var pwd = signupDto.Password;
            var hash = _hasher.CreateHash(pwd, BaseCryptoItem.HashAlgorithm.SHA3_512);
            signupDto.Password = hash;
            signupDto.ConfirmPassword = hash;
            
            return signupDto;
        }

        public async Task<IdentityResult> CreateUserAsync(RegisterViewModel userSignupDto)
        {
            RegisterViewModel userToCreate = FromSignupToUser(userSignupDto);
            return await _userManager.CreateAsync(userToCreate.ToUser());
        }

}