/* 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.valves;

import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletContext;
import javax.servlet.SessionCookieConfig;
import javax.servlet.http.Cookie;

import org.junit.Test;

import org.apache.catalina.Context;
import org.apache.catalina.Valve;
import org.apache.catalina.connector.Request;
import org.apache.catalina.connector.Response;
import org.apache.catalina.core.StandardPipeline;
import org.easymock.EasyMock;
import org.easymock.IMocksControl;

public class TestLoadBalancerDrainingValve {

    static class MockResponse extends Response {
        private List<Cookie> cookies;
        @Override
        public boolean isCommitted() {
            return false;
        }
        @Override
        public void addCookie(Cookie cookie)
        {
            if(null == cookies)
                cookies = new ArrayList<>(1);
            cookies.add(cookie);
        }
        @Override
        public List<Cookie> getCookies() {
            return cookies;
        }
    }

    static class CookieConfig implements SessionCookieConfig {

        private String name;
        private String domain;
        private String path;
        private String comment;
        private boolean httpOnly;
        private boolean secure;
        private int maxAge;

        @Override
        public String getName() {
            return name;
        }
        @Override
        public void setName(String name) {
            this.name = name;
        }
        @Override
        public String getDomain() {
            return domain;
        }
        @Override
        public void setDomain(String domain) {
            this.domain = domain;
        }
        @Override
        public String getPath() {
            return path;
        }
        @Override
        public void setPath(String path) {
            this.path = path;
        }
        @Override
        public String getComment() {
            return comment;
        }
        @Override
        public void setComment(String comment) {
            this.comment = comment;
        }
        @Override
        public boolean isHttpOnly() {
            return httpOnly;
        }
        @Override
        public void setHttpOnly(boolean httpOnly) {
            this.httpOnly = httpOnly;
        }
        @Override
        public boolean isSecure() {
            return secure;
        }
        @Override
        public void setSecure(boolean secure) {
            this.secure = secure;
        }
        @Override
        public int getMaxAge() {
            return maxAge;
        }
        @Override
        public void setMaxAge(int maxAge) {
            this.maxAge = maxAge;
        }
    }

    // A Cookie subclass that knows how to compare itself to other Cookie objects
    static class MyCookie extends Cookie {
        private static final long serialVersionUID = 1L;

        public MyCookie(String name, String value) { super(name, value); }

        @Override
        public boolean equals(Object o) {
            if(!(o instanceof MyCookie)) {
                return false;
            }

            MyCookie mc = (MyCookie)o;
            return mc.getName().equals(this.getName())
                && mc.getPath().equals(this.getPath())
                && mc.getValue().equals(this.getValue())
                && mc.getMaxAge() == this.getMaxAge();
        }

        @Override
        public int hashCode() {
            final int prime = 31;
            int result = 1;
            result = prime * result + getMaxAge();
            result = prime * result + ((getName() == null) ? 0 : getName().hashCode());
            result = prime * result + ((getPath() == null) ? 0 : getPath().hashCode());
            result = prime * result + ((getValue() == null) ? 0 : getValue().hashCode());
            return result;
        }


        @Override
        public String toString() {
            return "Cookie { name=" + getName() + ", value=" + getValue() + ", path=" + getPath() + ", maxAge=" + getMaxAge() + " }";
        }
    }

    @Test
    public void testNormalRequest() throws Exception {
        runValve("ACT", true, true, false, null);
    }

    @Test
    public void testDisabledValidSession() throws Exception {
        runValve("DIS", true, true, false, null);
    }

    @Test
    public void testDisabledInvalidSession() throws Exception {
        runValve("DIS", false, false, false, "foo=bar");
    }

    @Test
    public void testDisabledInvalidSessionWithIgnore() throws Exception {
        runValve("DIS", false, true, true, "foo=bar");
    }

    private void runValve(String jkActivation,
                          boolean validSessionId,
                          boolean expectInvokeNext,
                          boolean enableIgnore,
                          String queryString) throws Exception {
        IMocksControl control = EasyMock.createControl();
        ServletContext servletContext = control.createMock(ServletContext.class);
        Context ctx = control.createMock(Context.class);
        Request request = control.createMock(Request.class);
        Response response = control.createMock(Response.class);

        String sessionCookieName = "JSESSIONID";
        String sessionId = "cafebabe";
        String requestURI = "/test/path";
        SessionCookieConfig cookieConfig = new CookieConfig();
        cookieConfig.setDomain("example.com");
        cookieConfig.setName(sessionCookieName);
        cookieConfig.setPath("/");

        // Valve.init requires all of this stuff
        EasyMock.expect(ctx.getMBeanKeyProperties()).andStubReturn("");
        EasyMock.expect(ctx.getName()).andStubReturn("");
        EasyMock.expect(ctx.getPipeline()).andStubReturn(new StandardPipeline());
        EasyMock.expect(ctx.getDomain()).andStubReturn("foo");
        EasyMock.expect(ctx.getLogger()).andStubReturn(org.apache.juli.logging.LogFactory.getLog(LoadBalancerDrainingValve.class));
        EasyMock.expect(ctx.getServletContext()).andStubReturn(servletContext);

        // Set up the actual test
        EasyMock.expect(request.getAttribute(LoadBalancerDrainingValve.ATTRIBUTE_KEY_JK_LB_ACTIVATION)).andStubReturn(jkActivation);
        EasyMock.expect(Boolean.valueOf(request.isRequestedSessionIdValid())).andStubReturn(Boolean.valueOf(validSessionId));

        ArrayList<Cookie> cookies = new ArrayList<>();
        if(enableIgnore) {
            cookies.add(new Cookie("ignore", "true"));
        }

        if(!validSessionId) {
            MyCookie cookie = new MyCookie(cookieConfig.getName(), sessionId);
            cookie.setPath(cookieConfig.getPath());
            cookie.setValue(sessionId);

            cookies.add(cookie);

            EasyMock.expect(request.getRequestedSessionId()).andStubReturn(sessionId);
            EasyMock.expect(request.getRequestURI()).andStubReturn(requestURI);
            EasyMock.expect(request.getCookies()).andStubReturn(cookies.toArray(new Cookie[cookies.size()]));
            EasyMock.expect(request.getContext()).andStubReturn(ctx);
            EasyMock.expect(ctx.getSessionCookieName()).andStubReturn(sessionCookieName);
            EasyMock.expect(servletContext.getSessionCookieConfig()).andStubReturn(cookieConfig);
            EasyMock.expect(request.getQueryString()).andStubReturn(queryString);
            EasyMock.expect(ctx.getSessionCookiePath()).andStubReturn("/");

            if (!enableIgnore) {
                EasyMock.expect(Boolean.valueOf(ctx.getSessionCookiePathUsesTrailingSlash())).andStubReturn(Boolean.TRUE);
                EasyMock.expect(request.getQueryString()).andStubReturn(queryString);
                // Response will have cookie deleted
                MyCookie expectedCookie = new MyCookie(cookieConfig.getName(), "");
                expectedCookie.setPath(cookieConfig.getPath());
                expectedCookie.setMaxAge(0);

                // These two lines just mean EasyMock.expect(response.addCookie) but for a void method
                response.addCookie(expectedCookie);
                EasyMock.expect(ctx.getSessionCookieName()).andReturn(sessionCookieName); // Indirect call
                String expectedRequestURI = requestURI;
                if(null != queryString)
                    expectedRequestURI = expectedRequestURI + '?' + queryString;
                response.setHeader("Location", expectedRequestURI);
                response.setStatus(307);
            }
        }

        Valve next = control.createMock(Valve.class);

        if(expectInvokeNext) {
            // Expect the "next" Valve to fire
            // Next 2 lines are basically EasyMock.expect(next.invoke(req,res)) but for a void method
            next.invoke(request, response);
            EasyMock.expectLastCall();
        }

        // Get set to actually test
        control.replay();

        LoadBalancerDrainingValve valve = new LoadBalancerDrainingValve();
        valve.setContainer(ctx);
        valve.init();
        valve.setNext(next);
        valve.setIgnoreCookieName("ignore");
        valve.setIgnoreCookieValue("true");

        valve.invoke(request, response);

        control.verify();
    }
}