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/**
 * The MIT License (MIT)
 * 
 * Copyright (c) 2023-2024-2024 the original author or authors.
 * 

 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 

 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.bernardomg.validation.constraint;

import java.util.ArrayList;
import java.util.List;

import org.passay.CharacterRule;
import org.passay.EnglishCharacterData;
import org.passay.LengthRule;
import org.passay.PasswordData;
import org.passay.PasswordValidator;
import org.passay.Rule;
import org.passay.RuleResult;
import org.passay.WhitespaceRule;

import jakarta.validation.ConstraintValidator;
import jakarta.validation.ConstraintValidatorContext;

/**
 * Validator for the {@link StrongPassword} annotation. Makes use of the Passay library to validate the password.
 */
public final class PasswordConstraintValidator implements ConstraintValidator {

    /**
     * Password validator to be used.
     */
    private final PasswordValidator validator;

    public PasswordConstraintValidator() {
        super();

        final List rules = new ArrayList<>();

        // TODO: Make this configurable on annotation
        // Rule 1: Password length should be in between
        // 8 and 16 characters
        rules.add(new LengthRule(8, 16));
        // Rule 2: No whitespace allowed
        rules.add(new WhitespaceRule());
        // Rule 3.a: At least one Upper-case character
        rules.add(new CharacterRule(EnglishCharacterData.UpperCase, 1));
        // Rule 3.b: At least one Lower-case character
        rules.add(new CharacterRule(EnglishCharacterData.LowerCase, 1));
        // Rule 3.c: At least one digit
        rules.add(new CharacterRule(EnglishCharacterData.Digit, 1));
        // Rule 3.d: At least one special character
        rules.add(new CharacterRule(EnglishCharacterData.Special, 1));

        validator = new PasswordValidator(rules);
    }

    @Override
    public final boolean isValid(final String password, final ConstraintValidatorContext context) {
        final RuleResult result;
        final boolean    valid;

        result = validator.validate(new PasswordData(password));
        if (result.isValid()) {
            valid = true;
        } else {
            context.disableDefaultConstraintViolation();
            context.buildConstraintViolationWithTemplate(String.join(",", validator.getMessages(result)))
                .addConstraintViolation();
            valid = false;
        }

        return valid;
    }
}