package training.core.jobs;

import java.io.IOException;
import java.net.URL;
import java.util.Collections;
import java.util.Map;
import java.util.function.Consumer;

import javax.jcr.Node;
import javax.jcr.RepositoryException;
import javax.jcr.Session;

import org.apache.commons.lang3.StringUtils;
import org.apache.jackrabbit.commons.JcrUtils;
import org.apache.jackrabbit.oak.spi.nodetype.NodeTypeConstants;
import org.apache.sling.api.resource.LoginException;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.api.resource.ResourceResolverFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.fasterxml.jackson.databind.ObjectMapper;

import training.core.beans.CategoriesBean;
import training.core.beans.CategoryBean;

public class ProductCategoriesImportJob implements Runnable
{
    private static final Logger LOGGER = LoggerFactory.getLogger(ProductCategoriesImportJob.class);
    private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
    private static final String ROOT_PATH = "/content/hybris/categories";

    private ResourceResolverFactory resourceResolverFactory;

    public ProductCategoriesImportJob(final ResourceResolverFactory resourceResolverFactory)
    {
        this.resourceResolverFactory = resourceResolverFactory;
    }

    @Override
    public void run()
    {
        LOGGER.info("... Job ProductCategoriesImport is running ...");
        try
        {
            final ResourceResolver resourceResolver = this.resourceResolverFactory.getServiceResourceResolver(getAutheticationInfo());
            final CategoriesBean categoriesBean = fetchCategories();
            if (categoriesBean != null && !categoriesBean.getCategories().isEmpty())
            {
                final Session session = resourceResolver.adaptTo(Session.class);
                final Node rootNode = getNodeFromPath(ROOT_PATH, session);
                if(rootNode != null){
                    categoriesBean.getCategories().forEach(setCategoryNode(session));
                    session.save();
                }
            }
        }
        catch (LoginException e)
        {
            LOGGER.info("Problem with authetication", e);
        }
        catch (IOException e)
        {
            LOGGER.info("Problem with getting data from external system", e);
        }
        catch (RepositoryException e)
        {
            LOGGER.info("Problem with getting root node", e);
        }
    }

    private Consumer<CategoryBean> setCategoryNode(final Session session)
    {
        return categoryBean -> {
            try
            {
                final String categoryPath = StringUtils.join(ROOT_PATH, "/", categoryBean.getName());
                Node categoryNode = getNodeFromPath(categoryPath, session);
                categoryNode.setProperty("title", categoryBean.getTitle());
                categoryNode.setProperty("description", categoryBean.getDescription());
            }
            catch (RepositoryException e)
            {
                LOGGER.info("Problem with getting category node", e);
            }
        };
    }

    private CategoriesBean fetchCategories() throws java.io.IOException
    {
        return OBJECT_MAPPER.readValue(new URL("https://ibm.box.com/shared/static/ir9sbjgx7xgts991je91kxb4wtp1bufo.json"), CategoriesBean.class);
    }

    private Map<String, Object> getAutheticationInfo()
    {
        return Collections.singletonMap(ResourceResolverFactory.SUBSERVICE, "training-service2");
    }

    private Node getNodeFromPath(final String path, final Session session) throws RepositoryException
    {
        return JcrUtils.getOrCreateByPath(path, NodeTypeConstants.NT_UNSTRUCTURED, session);
    }

}