/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * See LICENSE.txt included in this distribution for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at LICENSE.txt.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
 * Portions Copyright (c) 2020, Chris Fraire <cfraire@me.com>.
 */
package org.opengrok.indexer.web;

import jakarta.servlet.AsyncContext;
import jakarta.servlet.DispatcherType;
import jakarta.servlet.RequestDispatcher;
import jakarta.servlet.ServletContext;
import jakarta.servlet.ServletInputStream;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import jakarta.servlet.http.Cookie;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import jakarta.servlet.http.HttpUpgradeHandler;
import jakarta.servlet.http.Part;
import org.apache.commons.lang3.RandomStringUtils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.Principal;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

/**
 * An dummy implementation of {@code HttpServletRequest} in which most methods
 * simply throw an exception. Unit tests that need an instance of
 * {@code HttpServletRequest} can create sub-classes that implement those
 * methods needed by the test case.
 * <p>
 * <p>Some methods that would have similar implementations in all sub-classes,
 * like set/get pairs, could be implemented here. Methods that would require
 * different implementations depending on the test, should rather just throw
 * an exception and let the tests override them.
 */
public class DummyHttpServletRequest implements HttpServletRequest {

    private final Map<String, Object> attrs = new HashMap<>();

    private Map<String, String[]> parameters = Collections.emptyMap();

    private class DummyHttpSession implements HttpSession {
        private Map<String, Object> attrs = new HashMap<>();

        @Override
        public long getCreationTime() {
            return 0;
        }

        @Override
        public String getId() {
            return RandomStringUtils.random(32, "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.");
        }

        @Override
        public long getLastAccessedTime() {
            return 0;
        }

        @Override
        public ServletContext getServletContext() {
            return (ServletContext) DummyHttpServletRequest.this;
        }

        @Override
        public void setMaxInactiveInterval(int i) {
        }

        @Override
        public int getMaxInactiveInterval() {
            return 3600;
        }

        @Override
        @SuppressWarnings("deprecation")
        public jakarta.servlet.http.HttpSessionContext getSessionContext() {
            throw new UnsupportedOperationException("Not supported yet.");
        }

        @Override
        public Object getAttribute(String string) {
            return attrs.get(string);
        }

        @Override
        @SuppressWarnings("deprecation")
        public Object getValue(String string) {
            throw new UnsupportedOperationException("Not supported yet.");
        }

        @Override
        public Enumeration<String> getAttributeNames() {
            throw new UnsupportedOperationException("Not supported yet.");
        }

        @Override
        @SuppressWarnings("deprecation")
        public String[] getValueNames() {
            throw new UnsupportedOperationException("Not supported yet.");
        }

        @Override
        public void setAttribute(String string, Object o) {
            attrs.put(string, o);
        }

        @Override
        @SuppressWarnings("deprecation")
        public void putValue(String string, Object o) {
        }

        @Override
        public void removeAttribute(String string) {
            attrs.remove(string);
        }

        @Override
        @SuppressWarnings("deprecation")
        public void removeValue(String string) {
        }

        @Override
        public void invalidate() {
            attrs = new HashMap<>();
        }

        @Override
        public boolean isNew() {
            return true;
        }
    }

    private HttpSession session;

    @Override
    public String getAuthType() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public Cookie[] getCookies() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public long getDateHeader(String string) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getHeader(String string) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public Enumeration<String> getHeaders(String string) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public Enumeration<String> getHeaderNames() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public int getIntHeader(String string) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getMethod() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getPathInfo() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getPathTranslated() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getContextPath() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getQueryString() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getRemoteUser() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public boolean isUserInRole(String string) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public Principal getUserPrincipal() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getRequestedSessionId() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getRequestURI() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public StringBuffer getRequestURL() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getServletPath() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public HttpSession getSession(boolean bln) {
        if (bln) {
            session = new DummyHttpSession();
        }

        return session;
    }

    @Override
    public HttpSession getSession() {
        if (session == null) {
            session = new DummyHttpSession();
        }
        return session;
    }

    @Override
    public String changeSessionId() {
        return null;
    }

    @Override
    public boolean isRequestedSessionIdValid() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public boolean isRequestedSessionIdFromCookie() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public boolean isRequestedSessionIdFromURL() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override @Deprecated
    public boolean isRequestedSessionIdFromUrl() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public boolean authenticate(HttpServletResponse httpServletResponse) {
        return false;
    }

    @Override
    public void login(String s, String s1) {

    }

    @Override
    public void logout() {

    }

    @Override
    public Collection<Part> getParts() {
        return null;
    }

    @Override
    public Part getPart(String s) {
        return null;
    }

    @Override
    public <T extends HttpUpgradeHandler> T upgrade(Class<T> aClass) {
        return null;
    }

    @Override
    public Object getAttribute(String string) {
        return attrs.get(string);
    }

    @Override
    public Enumeration<String> getAttributeNames() {
        return Collections.enumeration(attrs.keySet());
    }

    @Override
    public String getCharacterEncoding() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public void setCharacterEncoding(String string) throws UnsupportedEncodingException {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public int getContentLength() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public long getContentLengthLong() {
        return 0;
    }

    @Override
    public String getContentType() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public ServletInputStream getInputStream() throws IOException {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getParameter(String name) {
        String[] values = parameters.get(name);
        if (values != null && values.length > 0) {
            return values[0];
        } else {
            return null;
        }
    }

    @Override
    public Enumeration<String> getParameterNames() {
        return Collections.enumeration(parameters.keySet());
    }

    @Override
    public String[] getParameterValues(String name) {
        return parameters.get(name);
    }

    @Override
    public Map<String, String[]> getParameterMap() {
        return Collections.unmodifiableMap(parameters);
    }

    @Override
    public String getProtocol() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getScheme() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getServerName() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public int getServerPort() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public BufferedReader getReader() throws IOException {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getRemoteAddr() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getRemoteHost() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public void setAttribute(String name, Object o) {
        attrs.put(name, o);
    }

    @Override
    public void removeAttribute(String name) {
        attrs.remove(name);
    }

    @Override
    public Locale getLocale() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public Enumeration<Locale> getLocales() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public boolean isSecure() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public RequestDispatcher getRequestDispatcher(String string) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override @Deprecated
    public String getRealPath(String string) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public int getRemotePort() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getLocalName() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public String getLocalAddr() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public int getLocalPort() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public ServletContext getServletContext() {
        return null;
    }

    @Override
    public AsyncContext startAsync() throws IllegalStateException {
        return null;
    }

    @Override
    public AsyncContext startAsync(ServletRequest servletRequest, ServletResponse servletResponse) throws IllegalStateException {
        return null;
    }

    @Override
    public boolean isAsyncStarted() {
        return false;
    }

    @Override
    public boolean isAsyncSupported() {
        return false;
    }

    @Override
    public AsyncContext getAsyncContext() {
        return null;
    }

    @Override
    public DispatcherType getDispatcherType() {
        return null;
    }
}