// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.model.container.component;

import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;

import static com.yahoo.container.jdisc.JdiscBindingsConfig.Handlers;

/**
 * @author gjoranv
 */
public class DiscBindingsConfigGenerator {

    public static Map<String, Handlers.Builder> generate(Collection<? extends Handler> handlers) {
        Map<String, Handlers.Builder> handlerBuilders = new LinkedHashMap<>();

        for (Handler handler : handlers) {
            handlerBuilders.putAll(generate(handler));
        }
        return handlerBuilders;
    }

    public static <T extends Handler> Map<String, Handlers.Builder> generate(T handler) {
        if (handler.getServerBindings().isEmpty() && handler.getClientBindings().isEmpty())
            return Collections.emptyMap();

        return Collections.singletonMap(handler.model.getComponentId().stringValue(),
                            new Handlers.Builder()
                                    .serverBindings(toStrings(handler.getServerBindings()))
                                    .clientBindings(toStrings(handler.getClientBindings())));
    }

    private static Collection<String> toStrings(Collection<BindingPattern> bindings) {
        return bindings.stream().map(BindingPattern::patternString).toList();
    }
}