/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * 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
 * "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 org.kie.workbench.common.stunner.kogito.client.services.util.impl;

import java.util.HashMap;
import java.util.Map;

import javax.enterprise.context.ApplicationScoped;
import javax.inject.Inject;

import elemental2.promise.Promise;
import org.appformer.kogito.bridge.client.resource.ResourceContentService;
import org.appformer.kogito.bridge.client.resource.interop.ResourceContentOptions;
import org.kie.workbench.common.stunner.kogito.client.services.util.WorkItemIconCache;

@ApplicationScoped
public class WorkItemIconCacheImpl implements WorkItemIconCache {

    private Map<String, Promise<String>> cachedIcons = new HashMap<>();

    private final ResourceContentService resourceContentService;

    @Inject
    public WorkItemIconCacheImpl(final ResourceContentService resourceContentService) {
        this.resourceContentService = resourceContentService;
    }

    @Override
    public Promise<String> getIcon(String iconPath) {
        return cachedIcons.computeIfAbsent(iconPath, this::lookupPromise);
    }

    private Promise<String> lookupPromise(String iconPath) {
        return resourceContentService.get(iconPath, ResourceContentOptions.binary())
                .catch_(error -> {
                    return Promise.resolve("");
                });
    }
}
