/**
 * 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.fineract.credit.scorecard;

import java.util.Map;

/**
 * Representing a Server configuration.
 */
public class ServerConfiguration {
    public String URL;
    public String description;
    public Map<String, ServerVariable> variables;

    /**
     * @param URL A URL to the target host.
     * @param description A describtion of the host designated by the URL.
     * @param variables A map between a variable name and its value. The value is used for substitution in the server's URL template.
     */
    public ServerConfiguration(String URL, String description, Map<String, ServerVariable> variables) {
        this.URL = URL;
        this.description = description;
        this.variables = variables;
    }

    /**
     * Format URL template using given variables.
     *
     * @param variables A map between a variable name and its value.
     * @return Formatted URL.
     */
    public String URL(Map<String, String> variables) {
        String url = this.URL;

        // go through variables and replace placeholders
        for (Map.Entry<String, ServerVariable> variable: this.variables.entrySet()) {
            String name = variable.getKey();
            ServerVariable serverVariable = variable.getValue();
            String value = serverVariable.defaultValue;

            if (variables != null && variables.containsKey(name)) {
                value = variables.get(name);
                if (serverVariable.enumValues.size() > 0 && !serverVariable.enumValues.contains(value)) {
                    throw new RuntimeException("The variable " + name + " in the server URL has invalid value " + value + ".");
                }
            }
            url = url.replaceAll("\\{" + name + "\\}", value);
        }
        return url;
    }

    /**
     * Format URL template using default server variables.
     *
     * @return Formatted URL.
     */
    public String URL() {
        return URL(null);
    }
}