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// 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
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// specific language governing permissions and limitations
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package org.apache.cloudstack.api.command.user.template;

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.ExtractResponse;
import org.apache.cloudstack.api.response.TemplateResponse;
import org.apache.cloudstack.api.response.ZoneResponse;
import org.apache.cloudstack.context.CallContext;

import com.cloud.dc.DataCenter;
import com.cloud.event.EventTypes;
import com.cloud.exception.InternalErrorException;
import com.cloud.template.VirtualMachineTemplate;
import com.cloud.user.Account;

@APICommand(name = "extractTemplate", description = "Extracts a Template", responseObject = ExtractResponse.class,
        requestHasSensitiveInfo = false, responseHasSensitiveInfo = false)
public class ExtractTemplateCmd extends BaseAsyncCmd {


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

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

    @Parameter(name = ApiConstants.URL, type = CommandType.STRING, required = false, length = 2048, description = "The url to which the ISO would be extracted")
    private String url;

    @Parameter(name = ApiConstants.ZONE_ID,
               type = CommandType.UUID,
               entityType = ZoneResponse.class,
               required = false,
               description = "The ID of the zone where the ISO is originally located")
    private Long zoneId;

    @Parameter(name = ApiConstants.MODE, type = CommandType.STRING, required = true, description = "The mode of extraction - HTTP_DOWNLOAD or FTP_UPLOAD")
    private String mode;

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

    public Long getId() {
        return id;
    }

    public String getUrl() {
        return url;
    }

    public Long getZoneId() {
        return zoneId;
    }

    public String getMode() {
        return mode;
    }

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

    @Override
    public long getEntityOwnerId() {
        VirtualMachineTemplate template = _entityMgr.findById(VirtualMachineTemplate.class, getId());
        if (template != null) {
            return template.getAccountId();
        }

        // invalid id, parent this command to SYSTEM so ERROR events are tracked
        return Account.ACCOUNT_ID_SYSTEM;
    }

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

    @Override
    public String getEventDescription() {
        String templateId = this._uuidMgr.getUuid(VirtualMachineTemplate.class, getId());
        String baseDescription = String.format("Extracting Template: %s", templateId);

        Long zoneId = getZoneId();
        if (zoneId == null) {
            return baseDescription;
        }

        return String.format("%s from zone: %s", baseDescription, this._uuidMgr.getUuid(DataCenter.class, zoneId));
    }

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

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

    @Override
    public void execute() {
        try {
            CallContext.current().setEventDetails(getEventDescription());
            String uploadUrl = _templateService.extract(this);
            if (uploadUrl != null) {
                ExtractResponse response = _responseGenerator.createImageExtractResponse(id, zoneId, getEntityOwnerId(), mode, uploadUrl);
                response.setResponseName(getCommandName());
                response.setObjectName("template");
                this.setResponseObject(response);
            } else {
                throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, "Failed to extract Template");
            }
        } catch (InternalErrorException ex) {
            logger.warn("Exception: ", ex);
            throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, ex.getMessage());
        }
    }
}
