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// 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
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package org.apache.cloudstack.api.command.admin.host;

import org.apache.cloudstack.api.APICommand;
import org.apache.cloudstack.api.ApiCommandResourceType;
import org.apache.cloudstack.api.ApiConstants;
import org.apache.cloudstack.api.ApiErrorCode;
import org.apache.cloudstack.api.BaseAsyncCmd;
import org.apache.cloudstack.api.Parameter;
import org.apache.cloudstack.api.ServerApiException;
import org.apache.cloudstack.api.response.HostResponse;
import org.apache.cloudstack.context.CallContext;

import com.cloud.event.EventTypes;
import com.cloud.host.Host;
import com.cloud.user.Account;
import com.cloud.utils.exception.CloudRuntimeException;

@APICommand(name = "prepareHostForMaintenance", description = "Prepares a host for maintenance.", responseObject = HostResponse.class,
        requestHasSensitiveInfo = false, responseHasSensitiveInfo = false)
public class PrepareForMaintenanceCmd extends BaseAsyncCmd {


    /////////////////////////////////////////////////////
    //////////////// API parameters /////////////////////
    /////////////////////////////////////////////////////

    @Parameter(name = ApiConstants.ID, type = CommandType.UUID, entityType = HostResponse.class, required = true, description = "The host ID")
    private Long id;

    /////////////////////////////////////////////////////
    /////////////////// Accessors ///////////////////////
    /////////////////////////////////////////////////////

    public Long getId() {
        return id;
    }

    /////////////////////////////////////////////////////
    /////////////// API Implementation///////////////////
    /////////////////////////////////////////////////////

    public static String getResultObjectName() {
        return "host";
    }

    @Override
    public long getEntityOwnerId() {
        Account account = CallContext.current().getCallingAccount();
        if (account != null) {
            return account.getId();
        }

        return Account.ACCOUNT_ID_SYSTEM; // no account info given, parent this command to SYSTEM so ERROR events are tracked
    }

    @Override
    public String getEventType() {
        return EventTypes.EVENT_MAINTENANCE_PREPARE;
    }

    @Override
    public String getEventDescription() {
        return "preparing host: " + getId() + " for maintenance";
    }

    @Override
    public ApiCommandResourceType getApiResourceType() {
        return ApiCommandResourceType.Host;
    }

    @Override
    public Long getApiResourceId() {
        return getId();
    }

    public void setId(Long id) {
        this.id = id;
    }

    @Override
    public void execute() {
        try {
            Host result = _resourceService.maintain(this);
            if (result != null) {
                HostResponse response = _responseGenerator.createHostResponse(result);
                response.setResponseName("host");
                this.setResponseObject(response);
            } else {
                throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, "Failed to prepare host for maintenance");
            }
        } catch (CloudRuntimeException exception) {
            throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, "Failed to prepare host for maintenance due to: " + exception.getMessage());
        }
    }
}
