/*
 * $Id$
 *
 * 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.struts2;

import java.io.UnsupportedEncodingException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.ConsoleHandler;
import java.util.logging.Formatter;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.dispatcher.Dispatcher;
import org.apache.struts2.dispatcher.mapper.ActionMapper;
import org.apache.struts2.dispatcher.mapper.ActionMapping;
import org.apache.struts2.util.StrutsTestCaseHelper;
import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.mock.web.MockHttpServletResponse;
import org.springframework.mock.web.MockPageContext;
import org.springframework.mock.web.MockServletContext;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionProxy;
import com.opensymphony.xwork2.ActionProxyFactory;
import com.opensymphony.xwork2.XWorkTestCase;
import com.opensymphony.xwork2.config.Configuration;
import com.opensymphony.xwork2.util.logging.LoggerFactory;
import com.opensymphony.xwork2.util.logging.jdk.JdkLoggerFactory;

/**
 * Base test case for JUnit testing Struts.
 */
public abstract class StrutsTestCase extends XWorkTestCase {
    protected MockHttpServletResponse response;
    protected MockHttpServletRequest request;
    protected MockPageContext pageContext;
    protected MockServletContext servletContext;
    protected Map<String, String> dispatcherInitParams;
    
    protected DefaultResourceLoader resourceLoader = new DefaultResourceLoader();

    static {
        ConsoleHandler handler = new ConsoleHandler();
        final SimpleDateFormat df = new SimpleDateFormat("mm:ss.SSS");
        Formatter formatter = new Formatter() {
            @Override
            public String format(LogRecord record) {
                StringBuilder sb = new StringBuilder();
                sb.append(record.getLevel());
                sb.append(':');
                for (int x = 9 - record.getLevel().toString().length(); x > 0; x--) {
                    sb.append(' ');
                }
                sb.append('[');
                sb.append(df.format(new Date(record.getMillis())));
                sb.append("] ");
                sb.append(formatMessage(record));
                sb.append('\n');
                return sb.toString();
            }
        };
        handler.setFormatter(formatter);
        Logger logger = Logger.getLogger("");
        if (logger.getHandlers().length > 0)
            logger.removeHandler(logger.getHandlers()[0]);
        logger.addHandler(handler);
        logger.setLevel(Level.WARNING);
        LoggerFactory.setLoggerFactory(new JdkLoggerFactory());
    }

    /**
     * gets an object from the stack after an action is executed
     */
    protected Object findValueAfterExecute(String key) {
        return ServletActionContext.getValueStack(request).findValue(key);
    }

    /**
     * Executes an action and returns it's output (not the result returned from
     * execute()), but the actual output that would be written to the response.
     * For this to work the configured result for the action needs to be
     * FreeMarker, or Velocity (JSPs can be used with the Embedded JSP plugin)
     */
    protected String executeAction(String uri) throws ServletException, UnsupportedEncodingException {
        request.setRequestURI(uri);
        ActionMapping mapping = getActionMapping(request);

        assertNotNull(mapping);
        Dispatcher.getInstance().serviceAction(request, response, servletContext, mapping);

        if (response.getStatus() != HttpServletResponse.SC_OK)
            throw new ServletException("Error code [" + response.getStatus() + "], Error: ["
                    + response.getErrorMessage() + "]");

        return response.getContentAsString();
    }

    /**
     * Creates an action proxy for a request, and sets parameters of the ActionInvocation to the passed
     * parameters. Make sure to set the request parameters in the protected "request" object before calling this method.
     */
    protected ActionProxy getActionProxy(String uri) {
        request.setRequestURI(uri);
        ActionMapping mapping = getActionMapping(request);
        String namespace = mapping.getNamespace();
        String name = mapping.getName();
        String method = mapping.getMethod();

        Configuration config = configurationManager.getConfiguration();
        ActionProxy proxy = config.getContainer().getInstance(ActionProxyFactory.class).createActionProxy(
                namespace, name, method, new HashMap<String, Object>(), true, false);

        ActionContext invocationContext = proxy.getInvocation().getInvocationContext();
        invocationContext.setParameters(new HashMap(request.getParameterMap()));
        // set the action context to the one used by the proxy
        ActionContext.setContext(invocationContext);

        // this is normaly done in onSetUp(), but we are using Struts internal
        // objects (proxy and action invocation)
        // so we have to hack around so it works
        ServletActionContext.setServletContext(servletContext);
        ServletActionContext.setRequest(request);
        ServletActionContext.setResponse(response);

        return proxy;
    }

    /**
     * Finds an ActionMapping for a given request
     */
    protected ActionMapping getActionMapping(HttpServletRequest request) {
        return Dispatcher.getInstance().getContainer().getInstance(ActionMapper.class).getMapping(request,
                Dispatcher.getInstance().getConfigurationManager());
    }

    /**
     * Finds an ActionMapping for a given url
     */
    protected ActionMapping getActionMapping(String url) {
        MockHttpServletRequest req = new MockHttpServletRequest();
        req.setRequestURI(url);
        return getActionMapping(req);
    }

    /**
     * Injects dependencies on an Object using Struts internal IoC container
     */
    protected void injectStrutsDependencies(Object object) {
        Dispatcher.getInstance().getContainer().inject(object);
    }


    /**
     * Sets up the configuration settings, XWork configuration, and
     * message resources
     */
    protected void setUp() throws Exception {
        super.setUp();
        initServletMockObjects();
        setupBeforeInitDispatcher();
        initDispatcher(dispatcherInitParams);
    }

    protected void setupBeforeInitDispatcher() throws Exception {
    }

    protected void initServletMockObjects() {
        servletContext = new MockServletContext(resourceLoader);
        response = new MockHttpServletResponse();
        request = new MockHttpServletRequest();
        pageContext = new MockPageContext(servletContext, request, response);
    }

    protected Dispatcher initDispatcher(Map<String, String> params) {
        Dispatcher du = StrutsTestCaseHelper.initDispatcher(servletContext, params);
        configurationManager = du.getConfigurationManager();
        configuration = configurationManager.getConfiguration();
        container = configuration.getContainer();
        return du;
    }

    protected void tearDown() throws Exception {
        super.tearDown();
        StrutsTestCaseHelper.tearDown();
    }

}
