/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.keycloak.keys;

import org.keycloak.Config;
import org.keycloak.component.ComponentModel;
import org.keycloak.component.ComponentValidationException;
import org.keycloak.models.KeycloakSession;
import org.keycloak.models.KeycloakSessionFactory;
import org.keycloak.provider.ConfigurationValidationHelper;
import org.keycloak.provider.ProviderConfigProperty;

import java.util.List;

import static org.keycloak.provider.ProviderConfigProperty.STRING_TYPE;

/**
 * @author <a href="mailto:sthorger@redhat.com">Stian Thorgersen</a>
 */
public class JavaKeystoreKeyProviderFactory extends AbstractRsaKeyProviderFactory {

    public static final String ID = "java-keystore";

    public static String KEYSTORE_KEY = "keystore";
    public static ProviderConfigProperty KEYSTORE_PROPERTY = new ProviderConfigProperty(KEYSTORE_KEY, "Keystore", "Path to keys file", STRING_TYPE, null);

    public static String KEYSTORE_PASSWORD_KEY = "keystorePassword";
    public static ProviderConfigProperty KEYSTORE_PASSWORD_PROPERTY = new ProviderConfigProperty(KEYSTORE_PASSWORD_KEY, "Keystore Password", "Password for the keys", STRING_TYPE, null, true);

    public static String KEY_ALIAS_KEY = "keyAlias";
    public static ProviderConfigProperty KEY_ALIAS_PROPERTY = new ProviderConfigProperty(KEY_ALIAS_KEY, "Private Key Alias", "Alias for the private key", STRING_TYPE, null);

    public static String KEY_PASSWORD_KEY = "keyPassword";
    public static ProviderConfigProperty KEY_PASSWORD_PROPERTY = new ProviderConfigProperty(KEY_PASSWORD_KEY, "Private Key password", "Password for the private key", STRING_TYPE, null, true);

    private static final String HELP_TEXT = "Loads keys from a Java keys file";

    private static final List<ProviderConfigProperty> CONFIG_PROPERTIES = AbstractRsaKeyProviderFactory.configurationBuilder()
            .property(KEYSTORE_PROPERTY)
            .property(KEYSTORE_PASSWORD_PROPERTY)
            .property(KEY_ALIAS_PROPERTY)
            .property(KEY_PASSWORD_PROPERTY)
            .build();

    @Override
    public KeyProvider create(KeycloakSession session, ComponentModel model) {
        return new JavaKeystoreKeyProvider(session.getContext().getRealm(), model);
    }

    @Override
    public void validateConfiguration(KeycloakSession session, ComponentModel model) throws ComponentValidationException {
        super.validateConfiguration(session, model);

        ConfigurationValidationHelper.check(model)
                .checkSingle(KEYSTORE_PROPERTY, true)
                .checkSingle(KEYSTORE_PASSWORD_PROPERTY, true)
                .checkSingle(KEY_ALIAS_PROPERTY, true)
                .checkSingle(KEY_PASSWORD_PROPERTY, true);

        try {
            new JavaKeystoreKeyProvider(session.getContext().getRealm(), model)
                    .loadKeys(session.getContext().getRealm(), model);
        } catch (Throwable t) {
            throw new ComponentValidationException("Failed to load keys", t);
        }
    }

    @Override
    public String getHelpText() {
        return HELP_TEXT;
    }

    @Override
    public List<ProviderConfigProperty> getConfigProperties() {
        return CONFIG_PROPERTIES;
    }

    @Override
    public void init(Config.Scope config) {
    }

    @Override
    public void postInit(KeycloakSessionFactory factory) {
    }

    @Override
    public void close() {
    }

    @Override
    public String getId() {
        return ID;
    }

}
