/*
 * 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.apache.camel.k.support;

import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.function.Predicate;

import org.apache.camel.CamelContext;
import org.apache.camel.Component;
import org.apache.camel.ExtendedCamelContext;
import org.apache.camel.spi.PropertiesComponent;
import org.apache.camel.spi.PropertyConfigurer;
import org.apache.camel.support.PluginHelper;
import org.apache.camel.support.PropertyBindingSupport;
import org.apache.camel.support.service.ServiceHelper;

public final class PropertiesSupport {

    private PropertiesSupport() {
    }

    public static <T> T bindProperties(CamelContext context, T target, String prefix) {
        return bindProperties(context, target, prefix, false);
    }

    public static <T> T bindProperties(CamelContext context, T target, String prefix, boolean stripPrefix) {
        return bindProperties(context, target, k -> k.startsWith(prefix), prefix, stripPrefix);
    }

    public static <T> T bindProperties(CamelContext context, T target, Predicate<String> filter, String prefix) {
        return bindProperties(context, target, filter, prefix, false);
    }

    public static <T> T bindProperties(CamelContext context, T target, Predicate<String> filter, String prefix, boolean stripPrefix) {
        final PropertiesComponent component = context.getPropertiesComponent();
        final Properties propertiesWithPrefix = component.loadProperties(filter);
        final Map<String, Object> properties = new HashMap<>();

        propertiesWithPrefix.stringPropertyNames().forEach(
            name -> properties.put(
                stripPrefix ? name.substring(prefix.length()) : name,
                propertiesWithPrefix.getProperty(name))
        );

        PropertyConfigurer configurer = null;
        if (target instanceof Component) {
            // the component needs to be initialized to have the configurer ready
            ServiceHelper.initService(target);
            configurer = ((Component) target).getComponentPropertyConfigurer();
        }

        if (configurer == null) {
            String name = target.getClass().getName();
            if (target instanceof ExtendedCamelContext) {
                // special for camel context itself as we have an extended configurer
                name = ExtendedCamelContext.class.getName();
            }

            // see if there is a configurer for it
            configurer = PluginHelper.getConfigurerResolver(context.getCamelContextExtension()).resolvePropertyConfigurer(name, context);
        }

        PropertyBindingSupport.build()
            .withIgnoreCase(true)
            .withCamelContext(context)
            .withTarget(target)
            .withProperties(properties)
            .withRemoveParameters(true)
            .withOptionPrefix(stripPrefix ? null : prefix)
            .withConfigurer(configurer)
            .bind();

        return target;
    }

}
