package org.bonitasoft.web.toolkit.client.ui.page.itemListingPage;

import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.bonitasoft.web.rest.model.bpm.process.ProcessItem;
import org.bonitasoft.web.toolkit.client.common.json.JSonItemReader;
import org.bonitasoft.web.toolkit.client.data.api.callback.APICallback;
import org.bonitasoft.web.toolkit.client.data.item.IItem;
import org.bonitasoft.web.toolkit.client.ui.component.filler.ComponentFiller;

/**
 * Fill the resourceFilter section with the filters found in database.
 *
 * @author Séverin Moussel
 */
public final class ResourceFilterFiller<T extends IItem> extends ComponentFiller {

    private final ItemListingPage<T> itemListingPage;

    private final ItemListingResourceFilter filter;

    public ResourceFilterFiller(ItemListingPage<T> itemListingPage, final ItemListingResourceFilter filter) {
        this.itemListingPage = itemListingPage;
        this.filter = filter;
    }

    @Override
    protected void getData(final APICallback callback) {
        this.filter.getSearchRequest().run(callback);
    }

    @Override
    protected void setData(final String json, final Map<String, String> headers) {
        final List<IItem> items = JSonItemReader.parseItems(json, this.filter.getSearchRequest().getItemDefinition());
        final List<ItemListingFilter> filters = new LinkedList<ItemListingFilter>();

        if (items.size() != 0) {
            this.itemListingPage.addTitleToSection(itemListingPage.defineResourceFiltersTitle(), itemListingPage.resourceFilters);
        }

        for (final IItem item : items) {

            // Fill additional filters using filters mapping
            final Map<String, String> additionalFilters = new HashMap<String, String>();
            additionalFilters.putAll(this.filter.getFilters());

            for (final String tableResourceAttributeName : this.filter.getFiltersMapping().keySet()) {
                final String filterResourceAttributeName = this.filter.getFiltersMapping().get(tableResourceAttributeName);
                additionalFilters.put(tableResourceAttributeName, item.getAttributeValue(filterResourceAttributeName));
            }

            final ItemListingFilter resourceFilter = createResourceListingFilters(item);

            resourceFilter.setIsResourceFilter(true);
            resourceFilter.setFilters(additionalFilters);

            filters.add(resourceFilter);
        }

        itemListingPage.displayFilters(filters);
        itemListingPage.selectRightResourceFilter();
    }

    private ItemListingFilter createResourceListingFilters(final IItem item) {
        String label = item.getAttributeValue(this.filter.getLabelAttributeName());
        ItemListingFilter resourceFilter = new ItemListingFilter(item.getId().toString(), label, label, this.filter.getTablesToDisplay());
        if (filter instanceof AppResourceFilter) {
            resourceFilter.setAdditionnalInfo(item.getAttributeValue(ProcessItem.ATTRIBUTE_VERSION));
        }
        return resourceFilter;
    }
}