/**
 * Copyright © 2016-2022 The Thingsboard Authors
 *
 * Licensed 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.thingsboard.server.service.security.auth.oauth2;

import org.springframework.util.SerializationUtils;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Base64;
import java.util.Optional;

public class CookieUtils {

    public static Optional<Cookie> getCookie(HttpServletRequest request, String name) {
        Cookie[] cookies = request.getCookies();

        if (cookies != null && cookies.length > 0) {
            for (Cookie cookie : cookies) {
                if (cookie.getName().equals(name)) {
                    return Optional.of(cookie);
                }
            }
        }

        return Optional.empty();
    }

    public static void addCookie(HttpServletResponse response, String name, String value, int maxAge) {
        Cookie cookie = new Cookie(name, value);
        cookie.setPath("/");
        cookie.setHttpOnly(true);
        cookie.setMaxAge(maxAge);
        response.addCookie(cookie);
    }

    public static void deleteCookie(HttpServletRequest request, HttpServletResponse response, String name) {
        Cookie[] cookies = request.getCookies();
        if (cookies != null && cookies.length > 0) {
            for (Cookie cookie: cookies) {
                if (cookie.getName().equals(name)) {
                    cookie.setValue("");
                    cookie.setPath("/");
                    cookie.setMaxAge(0);
                    response.addCookie(cookie);
                }
            }
        }
    }

    public static String serialize(Object object) {
        return Base64.getUrlEncoder()
                .encodeToString(SerializationUtils.serialize(object));
    }

    public static <T> T deserialize(Cookie cookie, Class<T> cls) {
        return cls.cast(SerializationUtils.deserialize(
                Base64.getUrlDecoder().decode(cookie.getValue())));
    }
}
