// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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 com.cloud.hypervisor.vmware.resource;

import javax.annotation.PostConstruct;
import javax.inject.Inject;

import org.apache.log4j.Logger;
import org.springframework.stereotype.Component;

import com.cloud.cluster.ClusterManager;
import com.cloud.hypervisor.vmware.manager.VmwareManager;
import com.cloud.hypervisor.vmware.util.VmwareClient;
import com.cloud.hypervisor.vmware.util.VmwareContext;
import com.cloud.hypervisor.vmware.util.VmwareContextPool;
import com.cloud.utils.StringUtils;

@Component
public class VmwareContextFactory {
    private static final Logger s_logger = Logger.getLogger(VmwareContextFactory.class);

    private static volatile int s_seq = 1;
    private static VmwareManager s_vmwareMgr;
    private static ClusterManager s_clusterMgr;
    private static VmwareContextPool s_pool;

    @Inject
    VmwareManager _vmwareMgr;
    @Inject
    ClusterManager _clusterMgr;

    static {
        // skip certificate check
        System.setProperty("axis.socketSecureFactory", "org.apache.axis.components.net.SunFakeTrustSocketFactory");
        s_pool = new VmwareContextPool();
    }

    @PostConstruct
    void init() {
        s_vmwareMgr = _vmwareMgr;
        s_clusterMgr = _clusterMgr;
    }

    public static VmwareContext create(String vCenterAddress, String vCenterUserName, String vCenterPassword) throws Exception {
        assert (vCenterAddress != null);
        assert (vCenterUserName != null);
        assert (vCenterPassword != null);

        String serviceUrl = "https://" + vCenterAddress + "/sdk/vimService";
        if (s_logger.isDebugEnabled())
            s_logger.debug("initialize VmwareContext. url: " + serviceUrl + ", username: " + vCenterUserName + ", password: " +
                StringUtils.getMaskedPasswordForDisplay(vCenterPassword));

        VmwareClient vimClient = new VmwareClient(vCenterAddress + "-" + s_seq++);
        vimClient.setVcenterSessionTimeout(s_vmwareMgr.getVcenterSessionTimeout());
        vimClient.connect(serviceUrl, vCenterUserName, vCenterPassword);

        VmwareContext context = new VmwareContext(vimClient, vCenterAddress);
        context.registerStockObject(VmwareManager.CONTEXT_STOCK_NAME, s_vmwareMgr);

        context.registerStockObject("serviceconsole", s_vmwareMgr.getServiceConsolePortGroupName());
        context.registerStockObject("manageportgroup", s_vmwareMgr.getManagementPortGroupName());
        context.registerStockObject("noderuninfo", String.format("%d-%d", s_clusterMgr.getManagementNodeId(), s_clusterMgr.getCurrentRunId()));

        context.setPoolInfo(s_pool, VmwareContextPool.composePoolKey(vCenterAddress, vCenterUserName));
        s_pool.registerOutstandingContext(context);

        return context;
    }

    public static VmwareContext getContext(String vCenterAddress, String vCenterUserName, String vCenterPassword) throws Exception {
        VmwareContext context = s_pool.getContext(vCenterAddress, vCenterUserName);
        if (context == null) {
            context = create(vCenterAddress, vCenterUserName, vCenterPassword);
        } else {
            // Validate current context and verify if vCenter session timeout value of the context matches the timeout value set by Admin
            if (!context.validate() || (context.getVimClient().getVcenterSessionTimeout() != s_vmwareMgr.getVcenterSessionTimeout())) {
                s_logger.info("Validation of the context failed, dispose and create a new one");
                context.close();
                context = create(vCenterAddress, vCenterUserName, vCenterPassword);
            }
        }

        if (context != null) {
            context.registerStockObject(VmwareManager.CONTEXT_STOCK_NAME, s_vmwareMgr);

            context.registerStockObject("serviceconsole", s_vmwareMgr.getServiceConsolePortGroupName());
            context.registerStockObject("manageportgroup", s_vmwareMgr.getManagementPortGroupName());
            context.registerStockObject("noderuninfo", String.format("%d-%d", s_clusterMgr.getManagementNodeId(), s_clusterMgr.getCurrentRunId()));
        }

        return context;
    }
}
