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/*
 * 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.impl.console;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.camel.spi.BrowsableVariableRepository;
import org.apache.camel.spi.annotations.DevConsole;
import org.apache.camel.support.console.AbstractDevConsole;
import org.apache.camel.util.json.JsonObject;

@DevConsole(name = "variables", description = "Displays variables")
public class VariablesDevConsole extends AbstractDevConsole {

    public VariablesDevConsole() {
        super("camel", "variables", "Variables", "Displays variables");
    }

    @Override
    protected String doCallText(Map options) {
        StringBuilder sb = new StringBuilder();

        Set repos = getCamelContext().getRegistry().findByType(BrowsableVariableRepository.class);
        for (BrowsableVariableRepository repo : repos) {
            sb.append("\n");
            sb.append(String.format("Repository: %s (size: %d)", repo.getId(), repo.size()));
            for (Map.Entry entry : repo.getVariables().entrySet()) {
                String k = entry.getKey();
                Object v = entry.getValue();
                String t = v != null ? v.getClass().getName() : "";
                sb.append(String.format("\n    %s (%s) = %s", k, t, v));
            }
            sb.append("\n");
        }

        return sb.toString();
    }

    @Override
    protected JsonObject doCallJson(Map options) {
        JsonObject root = new JsonObject();

        Set repos = getCamelContext().getRegistry().findByType(BrowsableVariableRepository.class);
        for (BrowsableVariableRepository repo : repos) {
            final List arr = toJsonObjects(repo);
            if (!arr.isEmpty()) {
                root.put(repo.getId(), arr);
            }
        }

        return root;
    }

    private static List toJsonObjects(BrowsableVariableRepository repo) {
        List arr = new ArrayList<>();
        for (Map.Entry entry : repo.getVariables().entrySet()) {
            String k = entry.getKey();
            Object v = entry.getValue();
            String t = v != null ? v.getClass().getName() : null;
            JsonObject e = new JsonObject();
            e.put("key", k);
            if (t != null) {
                e.put("type", t);
            }
            e.put("value", v);
            arr.add(e);
        }
        return arr;
    }
}