/*
 * 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.catalina.authenticator;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.OptionalInt;

import jakarta.servlet.http.Cookie;

import org.apache.tomcat.util.buf.ByteChunk;

/**
 * Object that saves the critical information from a request so that form-based authentication can reproduce it once the
 * user has been authenticated.
 * <p>
 * <b>IMPLEMENTATION NOTE</b> - It is assumed that this object is accessed only from the context of a single thread, so
 * no synchronization around internal collection classes is performed.
 *
 * @author Craig R. McClanahan
 */
public final class SavedRequest implements Serializable {

    private static final long serialVersionUID = 1L;

    /**
     * The set of Cookies associated with this Request.
     */
    private final List<Cookie> cookies = new ArrayList<>();

    public void addCookie(Cookie cookie) {
        cookies.add(cookie);
    }

    public Iterator<Cookie> getCookies() {
        return cookies.iterator();
    }


    /**
     * The set of Headers associated with this Request. Each key is a header name, while the value is a List containing
     * one or more actual values for this header. The values are returned as an Iterator when you ask for them.
     */
    private final Map<String,List<String>> headers = new HashMap<>();

    public void addHeader(String name, String value) {
        headers.computeIfAbsent(name, k -> new ArrayList<>()).add(value);
    }

    public Iterator<String> getHeaderNames() {
        return headers.keySet().iterator();
    }

    public Iterator<String> getHeaderValues(String name) {
        List<String> values = headers.get(name);
        if (values == null) {
            return Collections.emptyIterator();
        } else {
            return values.iterator();
        }
    }


    /**
     * The set of Locales associated with this Request.
     */
    private final List<Locale> locales = new ArrayList<>();

    public void addLocale(Locale locale) {
        locales.add(locale);
    }

    public Iterator<Locale> getLocales() {
        return locales.iterator();
    }


    /**
     * The request method used on this Request.
     */
    private String method = null;

    public String getMethod() {
        return this.method;
    }

    public void setMethod(String method) {
        this.method = method;
    }


    /**
     * The query string associated with this Request.
     */
    private String queryString = null;

    public String getQueryString() {
        return this.queryString;
    }

    public void setQueryString(String queryString) {
        this.queryString = queryString;
    }


    /**
     * The request URI associated with this Request.
     */
    private String requestURI = null;

    public String getRequestURI() {
        return this.requestURI;
    }

    public void setRequestURI(String requestURI) {
        this.requestURI = requestURI;
    }


    /**
     * The decode request URI associated with this Request. Path parameters are also excluded
     */
    private String decodedRequestURI = null;

    public String getDecodedRequestURI() {
        return this.decodedRequestURI;
    }

    public void setDecodedRequestURI(String decodedRequestURI) {
        this.decodedRequestURI = decodedRequestURI;
    }


    /**
     * The body of this request.
     */
    private ByteChunk body = null;

    public ByteChunk getBody() {
        return this.body;
    }

    public void setBody(ByteChunk body) {
        this.body = body;
    }


    /**
     * The content type of the request, used if this is a POST.
     */
    private String contentType = null;

    public String getContentType() {
        return this.contentType;
    }

    public void setContentType(String contentType) {
        this.contentType = contentType;
    }


    /**
     * The original maxInactiveInterval for the session.
     */
    private OptionalInt originalMaxInactiveInterval = OptionalInt.empty();

    public OptionalInt getOriginalMaxInactiveIntervalOptional() {
        return originalMaxInactiveInterval;
    }

    /**
     * Obtain the original session maxInactiveInterval.
     *
     * @return the original session maxInactiveInterval
     *
     * @deprecated This method will be removed in Tomcat 12.0.x onwards. Use
     *                 {@link SavedRequest#getOriginalMaxInactiveIntervalOptional()}
     */
    @Deprecated
    public int getOriginalMaxInactiveInterval() {
        return originalMaxInactiveInterval.orElse(-1);
    }

    public void setOriginalMaxInactiveInterval(int originalMaxInactiveInterval) {
        this.originalMaxInactiveInterval = OptionalInt.of(originalMaxInactiveInterval);
    }
}
