/*
 * Copyright 2020 Red Hat, Inc. and/or its affiliates.
 *
 * 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.kie.kogito.taskassigning.auth.mp;

import java.util.HashMap;
import java.util.Map;
import java.util.function.Function;
import java.util.stream.Collectors;

import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.Instance;
import javax.inject.Inject;

import org.kie.kogito.taskassigning.auth.AuthenticationCredentials;

@ApplicationScoped
public class AuthenticationFilterFactory {

    private Map<Class<? extends AuthenticationCredentials>, AuthenticationFilterProvider<? extends AuthenticationCredentials>> providers = new HashMap<>();

    public AuthenticationFilterFactory() {
        //CDI proxying
    }

    @Inject
    public AuthenticationFilterFactory(Instance<AuthenticationFilterProvider<?>> instance) {
        this.providers = instance.stream().collect(Collectors.toMap(AuthenticationFilterProvider::getCredentialsType, Function.identity()));
    }

    @SuppressWarnings("unchecked")
    public AuthenticationFilter newAuthenticationFilter(AuthenticationCredentials credentials) {
        AuthenticationFilterProvider<? extends AuthenticationCredentials> provider = providers.get(credentials.getClass());
        if (provider == null) {
            throw new UnsupportedOperationException("Authentication method is not supported for the credentials: " + credentials);
        }
        return ((AuthenticationFilterProvider) provider).createInstance(credentials);
    }
}
