/*
 * 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.hugegraph.api.filter;

import static org.apache.hugegraph.api.API.CHARSET;

import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.io.Charsets;
import org.apache.commons.io.IOUtils;

import jakarta.inject.Singleton;
import jakarta.ws.rs.HttpMethod;
import jakarta.ws.rs.container.ContainerRequestContext;
import jakarta.ws.rs.container.ContainerRequestFilter;
import jakarta.ws.rs.container.PreMatching;
import jakarta.ws.rs.core.MultivaluedMap;
import jakarta.ws.rs.ext.Provider;

@Provider
@Singleton
@PreMatching
public class PathFilter implements ContainerRequestFilter {

    public static final String REQUEST_TIME = "request_time";
    public static final String REQUEST_PARAMS_JSON = "request_params_json";

    @Override
    public void filter(ContainerRequestContext context)
            throws IOException {
        context.setProperty(REQUEST_TIME, System.currentTimeMillis());

        // record the request json
        String method = context.getMethod();
        String requestParamsJson = "";
        if (method.equals(HttpMethod.POST)) {
            requestParamsJson = IOUtils.toString(context.getEntityStream(), Charsets.toCharset(CHARSET));
            // replace input stream because we have already read it
            InputStream in = IOUtils.toInputStream(requestParamsJson, Charsets.toCharset(CHARSET));
            context.setEntityStream(in);
        } else if(method.equals(HttpMethod.GET)){
            MultivaluedMap<String, String> pathParameters = context.getUriInfo().getPathParameters();
            requestParamsJson = pathParameters.toString();
        }

        context.setProperty(REQUEST_PARAMS_JSON, requestParamsJson);
    }
}