/*
 * 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.services.resources.admin;

import org.jboss.logging.Logger;
import org.jboss.resteasy.annotations.cache.NoCache;
import org.jboss.resteasy.spi.NotFoundException;
import org.keycloak.common.ClientConnection;
import org.keycloak.component.ComponentModel;
import org.keycloak.events.admin.OperationType;
import org.keycloak.models.KeycloakSession;
import org.keycloak.models.RealmModel;
import org.keycloak.provider.ProviderFactory;
import org.keycloak.services.ServicesLogger;
import org.keycloak.services.managers.UserStorageSyncManager;
import org.keycloak.storage.UserStorageProvider;
import org.keycloak.storage.UserStorageProviderModel;
import org.keycloak.storage.ldap.LDAPStorageProvider;
import org.keycloak.storage.ldap.LDAPStorageProviderFactory;
import org.keycloak.storage.ldap.mappers.LDAPStorageMapper;
import org.keycloak.storage.user.SynchronizationResult;

import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.UriInfo;
import java.util.HashMap;
import java.util.Map;

/**
 * @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
 * @version $Revision: 1 $
 */
public class UserStorageProviderResource {
    private static final Logger logger = Logger.getLogger(UserStorageProviderResource.class);

    protected RealmModel realm;

    protected RealmAuth auth;

    protected AdminEventBuilder adminEvent;

    @Context
    protected ClientConnection clientConnection;

    @Context
    protected UriInfo uriInfo;

    @Context
    protected KeycloakSession session;

    @Context
    protected HttpHeaders headers;

    public UserStorageProviderResource(RealmModel realm, RealmAuth auth, AdminEventBuilder adminEvent) {
        this.auth = auth;
        this.realm = realm;
        this.adminEvent = adminEvent;

        auth.init(RealmAuth.Resource.USER);
    }

   /**
     * Trigger sync of users
     *
     * @return
     */
    @POST
    @Path("{id}/sync")
    @NoCache
    @Produces(MediaType.APPLICATION_JSON)
    public SynchronizationResult syncUsers(@PathParam("id") String id,
                                               @QueryParam("action") String action) {
        auth.requireManage();

        ComponentModel model = realm.getComponent(id);
        if (model == null) {
            throw new NotFoundException("Could not find component");
        }
        if (!model.getProviderType().equals(UserStorageProvider.class.getName())) {
            throw new NotFoundException("found, but not a UserStorageProvider");
        }

        UserStorageProviderModel providerModel = new UserStorageProviderModel(model);



        logger.debug("Syncing users");

        UserStorageSyncManager syncManager = new UserStorageSyncManager();
        SynchronizationResult syncResult;
        if ("triggerFullSync".equals(action)) {
            syncResult = syncManager.syncAllUsers(session.getKeycloakSessionFactory(), realm.getId(), providerModel);
        } else if ("triggerChangedUsersSync".equals(action)) {
            syncResult = syncManager.syncChangedUsers(session.getKeycloakSessionFactory(), realm.getId(), providerModel);
        } else {
            throw new NotFoundException("Unknown action: " + action);
        }

        Map<String, Object> eventRep = new HashMap<>();
        eventRep.put("action", action);
        eventRep.put("result", syncResult);
        adminEvent.operation(OperationType.ACTION).resourcePath(uriInfo).representation(eventRep).success();

        return syncResult;
    }

    /**
     * Trigger sync of mapper data related to ldap mapper (roles, groups, ...)
     *
     * @return
     */
    @POST
    @Path("{parentId}/mappers/{id}/sync")
    @NoCache
    @Produces(MediaType.APPLICATION_JSON)
    public SynchronizationResult syncMapperData(@PathParam("parentId") String parentId, @PathParam("id") String mapperId, @QueryParam("direction") String direction) {
        auth.requireManage();

        ComponentModel parentModel = realm.getComponent(parentId);
        if (parentModel == null) throw new NotFoundException("Parent model not found");
        ComponentModel mapperModel = realm.getComponent(mapperId);
        if (mapperModel == null) throw new NotFoundException("Mapper model not found");
        LDAPStorageMapper mapper = session.getProvider(LDAPStorageMapper.class, mapperModel);
        ProviderFactory factory = session.getKeycloakSessionFactory().getProviderFactory(LDAPStorageProvider.class, parentModel.getProviderId());

        LDAPStorageProviderFactory providerFactory = (LDAPStorageProviderFactory)factory;
        LDAPStorageProvider federationProvider = providerFactory.create(session, parentModel);

        ServicesLogger.LOGGER.syncingDataForMapper(mapperModel.getName(), mapperModel.getProviderId(), direction);

        SynchronizationResult syncResult;
        if ("fedToKeycloak".equals(direction)) {
            syncResult = mapper.syncDataFromFederationProviderToKeycloak(mapperModel, federationProvider, session, realm);
        } else if ("keycloakToFed".equals(direction)) {
            syncResult = mapper.syncDataFromKeycloakToFederationProvider(mapperModel, federationProvider, session, realm);
        } else {
            throw new NotFoundException("Unknown direction: " + direction);
        }

        Map<String, Object> eventRep = new HashMap<>();
        eventRep.put("action", direction);
        eventRep.put("result", syncResult);
        adminEvent.operation(OperationType.ACTION).resourcePath(uriInfo).representation(eventRep).success();
        return syncResult;
    }




}
