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/**
 * Copyright 2019 Pramati Prism, Inc.
 *
 * 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 io.hyscale.controller.hooks;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import io.hyscale.builder.services.docker.HyscaleDockerClient;
import io.hyscale.commons.component.InvokerHook;
import io.hyscale.commons.exception.HyscaleException;
import io.hyscale.commons.utils.ImageMetadataProvider;
import io.hyscale.controller.model.WorkflowContext;
import io.hyscale.servicespec.commons.exception.ServiceSpecErrorCodes;
import io.hyscale.servicespec.commons.fields.HyscaleSpecFields;
import io.hyscale.servicespec.commons.model.service.ServiceSpec;

/**
 * Hook to clean up local images created during build time
 *
 */
@Component
public class ImageCleanUpHook implements InvokerHook {

    private static final Logger logger = LoggerFactory.getLogger(ImageCleanUpHook.class);

    @Autowired
    private HyscaleDockerClient hyscaleDockerClient;

    @Autowired
    private ImageMetadataProvider imageMetadataProvider;
    
    @Override
    public void preHook(WorkflowContext context) {

    }

    @Override
    public void postHook(WorkflowContext context) throws HyscaleException {
        logger.debug("Cleaning up temp built image");
        ServiceSpec serviceSpec = context.getServiceSpec();
        if (serviceSpec == null) {
            logger.error(" Cannot clean up image without service specs ");
            throw new HyscaleException(ServiceSpecErrorCodes.SERVICE_SPEC_REQUIRED);
        }

        String serviceName = context.getServiceName() != null ? context.getServiceName()
                : serviceSpec.get(HyscaleSpecFields.name, String.class);

        String tag = serviceSpec.get(HyscaleSpecFields.getPath(HyscaleSpecFields.image, HyscaleSpecFields.tag),
                String.class);

        // Clean up temp image
        String imageName = imageMetadataProvider.getBuildImageNameWithTag(context.getAppName(), serviceName, tag);
        hyscaleDockerClient.deleteImage(imageName, false);
    }

    @Override
    public void onError(WorkflowContext context, Throwable th) {
        context.setFailed(true);
    }

}