using Microsoft.Extensions.Logging;
using System;

namespace ManagerService.Helpers
{
    public class ProfileLogic
    {
        private readonly ILogger<ProfileLogic> _logger;

        /// <summary>
        /// Scrypt algorithm pepper
        /// </summary>
        private const string PasswordsPepper = "m6rOay9Sg8pDGFRyHVWBWLZ8DahGdYgX";

        public ProfileLogic(ILogger<ProfileLogic> logger)
            : base()
        {
            _logger = logger;
        }

        public void TestPassword(string email, string userPassword, string password)
        {
            if (string.IsNullOrWhiteSpace(email))
            {
                _logger.LogError($"Authenticate error: No e-mail provided");
                throw new UnauthorizedAccessException("Authentication error");
            }

            if (string.IsNullOrEmpty(password))
            {
                _logger.LogError($"Authenticate error: No password provided");
                throw new UnauthorizedAccessException("Authentication error");
            }

            if (!PasswordUtils.Compare(userPassword, password, PasswordsPepper))
            {
                _logger.LogError($"Authenticate error: passwords doesn't match");
                throw new UnauthorizedAccessException("Authentication error");
            }
        }

        /// <summary>
        /// Hash a password
        /// </summary>
        /// <param name="password">Password to hash</param>
        /// <returns>Hashed password</returns>
        public string HashPassword(string password)
        {
            return PasswordUtils.Encode(password, PasswordsPepper);
        }
    }
}