namespace WebApplication1;

public class UserService

{

    public enum ClientType

    {

        none = 1,

        privateEntrepreur = 2,

        privateLimitedCompany = 3

    }

    public bool AddUser(string firname, string secondname, ClientType status, string email, DateTime birthdate, int clientId) { 

        if (string.IsNullOrEmpty(firname) || string.IsNullOrEmpty(secondname))

        {

            return false;

        }

        if (!CheckEmail(email)) return false;

        var n = DateTime.Now;

        int age = n.Year - birthdate.Year;

        if (n.Month < birthdate.Month || (n.Month == birthdate.Month && n.Day < birthdate.Day))

        {

            age--;

        }

        if (age < 21)

        {

            return false;

        }

        var repo = new ClientRepository();

        var client = repo.GetById(clientId);

        var user = new User

        {

            Client = client,

            DateOfBirth = birthdate,

            EmailAddress = email,

            Firstname = firname,

            Surname = secondname,

            Status = status

        };

        if (client.Title == "VeryImportantClient")

        {

            // cancel all limits

            using (var userCreditService = new UserCreditServiceClient())

            {

                var creditLimit = userCreditService.GetCreditLimit(user.Firstname, user.Surname, user.DateOfBirth);

                if (creditLimit != null || creditLimit > 0)

                {

                    userCreditService.SetCreditLimit(user.Firstname, user.Surname, user.DateOfBirth, -1);

                }

            }

            user.HasCreditLimit = false;

        }

        else if (client.Title == "ImportantClient")

        {

            // Do credit check and double credit limit

            user.HasCreditLimit = true;

            using (var userCreditService = new UserCreditServiceClient())

            {

                var creditLimit = userCreditService.GetCreditLimit(user.Firstname, user.Surname, user.DateOfBirth);

                creditLimit = creditLimit * 2;

                user.CreditLimit = creditLimit;

            }

        }

        else

        {

            // Do credit check

            user.HasCreditLimit = true;

            using (var userCreditService = new UserCreditServiceClient())

            {

                var creditLimit = userCreditService.GetCreditLimit(user.Firstname, user.Surname, user.DateOfBirth);

                user.CreditLimit = creditLimit;

            }

        }

        if (user.HasCreditLimit && user.CreditLimit < 500)

        {

            return false;

        }

        UserDataAccess.AddUser(user);

        return true;

        }

    public bool CheckEmail(string email) {

        bool valid = email.Contains("@") && !email.Contains(".");

        return valid;

    }

}