package com.softserve.validator;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

import com.softserve.form.Registration;
import com.softserve.service.UserService;

@Component
public class RegistrationValidation implements Validator {

    private static final String NAME_PATTERN = "[A-ZА-ЯЇ]{1}[A-ZА-߲ЯЇa-zа-яїє]{1,30}";
    private static final String EMAIL_PATTERN = "[A-Za-z0-9_\\.-]{1,30}@[A-Za-z0-9_\\.-]{1,30}";
    private static final String PASSWORD_PATTERN = "^(?=.*\\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[//@/./&/!#/$%/^/*/?])(?!.*\\s).{4,20}$";

    @Autowired
    private UserService userService;

    @Override
    public boolean supports(Class<?> clazz) {
        return Registration.class.isAssignableFrom(clazz);
    }

    @Override
    public void validate(Object target, Errors errors) {
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "password",
                "dataerror.field_required");
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "confirmPassword",
                "dataerror.field_required");
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "firstName",
                "dataerror.field_required");
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "lastName",
                "dataerror.field_required");
        Registration registration = (Registration) target;

        if (!registration.getFirstName().matches(NAME_PATTERN)) {
            errors.rejectValue("firstName", "dataerror.firstname");
        }
        if (!registration.getLastName().matches(NAME_PATTERN)) {
            errors.rejectValue("lastName", "dataerror.lastname");
        }

        if (userService.isExist(registration.getEmail())) {
            errors.rejectValue("email", "dataerror.email_exist");
        }

        if (!(registration.getPassword().equals(registration
                .getConfirmPassword()))) {
            errors.rejectValue("confirmPassword",
                    "dataerror.passwords_do_not_match");
        }

        if (!registration.getEmail().matches(EMAIL_PATTERN)) {
            errors.rejectValue("email", "dataerror.email_example");
        }

        if (!registration.getPassword().matches(PASSWORD_PATTERN)) {
            errors.rejectValue("password", "dataerror.password_pattern");
        }

        if (registration.getPassword().length() < 4) {
            errors.rejectValue("password", "dataerror.minimum_4_characters");
        }
    }

}