/*
 * 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.openjpa.persistence.exception;

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.RollbackException;

import org.apache.openjpa.lib.log.AbstractLog;
import org.apache.openjpa.lib.log.Log;
import org.apache.openjpa.lib.log.LogFactory;
import org.apache.openjpa.persistence.test.AbstractPersistenceTestCase;

public class TestParameterLogging extends AbstractPersistenceTestCase implements LogFactory {
    String _regex = ".*params=.*1,.*]";
    private static final String ID = Integer.toString(Integer.MIN_VALUE);
    @Override
    public void tearDown() throws Exception {
        super.tearDown();
        messages.clear();
    }
    /*
     * Persist the same row twice in the same transaction - will throw an exception with the failing SQL statement
     */
    private RollbackException getRollbackException(Object... props) {
        EntityManagerFactory emf = createEMF(props);
        EntityManager em = emf.createEntityManager();
        EntityTransaction tran = em.getTransaction();

        PObject p1, p2;
        p1 = new PObject();
        p2 = new PObject();

        p1.setId(1);
        p2.setId(1);

        try {
            tran.begin();
            em.persist(p1);
            em.persist(p2);
            tran.commit();
            em.close();
            fail("Expected a RollbackException");
            return null;
        } catch (RollbackException re) {
            return re;
        } finally {
            if (tran.isActive()) {
                tran.rollback();
            }
            closeEM(em);
            closeEMF(emf);
        }
    }

    /*
     * Ensure that parameter values are not included in exception text by default.
     */
    public void testNoParamsByDefault() {
        RollbackException e = getRollbackException(PObject.class, CLEAR_TABLES);

        assertFalse(Pattern.matches(_regex, e.toString()));
        Throwable nested = e.getCause();
        while (nested != null) {
            if (Pattern.matches(".*INSERT.*", nested.toString())) {
                // only check if the message contains the insert statement.
                assertFalse(Pattern.matches(_regex, nested.toString()));
            }
            nested = nested.getCause();
        }
    }

    /*
     * If the EMF is created with PrintParameters=true the parameter values will be logged in exception text.
     */
    public void testParamsEnabledByConfig() {
        RollbackException e =
            getRollbackException(PObject.class, CLEAR_TABLES, "openjpa.ConnectionFactoryProperties",
                "PrintParameters=true");
        assertFalse(Pattern.matches(_regex, e.toString()));
        Throwable nested = e.getCause();
        assertNotNull(nested); // expecting at least one nested exception.
        while (nested != null) {
            if (Pattern.matches(".*INSERT.*", nested.toString())) {
                // only check if the message contains the insert statement.
                assertTrue(Pattern.matches(_regex, nested.toString()));
            }
            nested = nested.getCause();
        }
    }

    public void testDefaultPrintParameters() {
        queryCachePrintParametersLogic(null);
    }

    public void testPrintParametersTrue() {
        queryCachePrintParametersLogic(true);
    }

    public void testPrintParametersFalse() {
        queryCachePrintParametersLogic(false);
    }

    private void queryCachePrintParametersLogic(Boolean printParameters){
        Object[] props = null;
        if (printParameters == null) {
            props =
                new Object[] { PObject.class, CLEAR_TABLES, "openjpa.DataCache", "true",
                    "openjpa.Log", "org.apache.openjpa.persistence.exception.TestParameterLogging" };
        } else {
            props =
                new Object[] { PObject.class, CLEAR_TABLES, "openjpa.DataCache", "true",
                    "openjpa.Log", "org.apache.openjpa.persistence.exception.TestParameterLogging",
                    "openjpa.ConnectionFactoryProperties", "PrintParameters=" + printParameters};
        }
        EntityManagerFactory emf = createEMF(props);
        EntityManager em = emf.createEntityManager();
        String queryStr = "SELECT c FROM PObject c WHERE c.id=:id";
        em.createQuery(queryStr).setParameter("id", Integer.MIN_VALUE).getResultList();
        em.createQuery(queryStr).setParameter("id", Integer.MIN_VALUE).getResultList();
        boolean expected = (printParameters == null) ? false : printParameters;
        boolean actual = false;

        // Look through all trace messages for the ID before doing asserts
        for (String s : messages) {
            actual |= s.contains(ID);
        }

        assertEquals(expected, actual);
    }

    // Start LogFactory implementation
    // This is static so both the test and the logger share
    private static List<String> messages = new ArrayList<>();
    @Override
    public Log getLog(String channel) {
        return new AbstractLog() {

            @Override
            protected boolean isEnabled(short logLevel) {
                return true;
            }

            @Override
            public void trace(Object message) {
                messages.add(message.toString());
            }

            @Override
            protected void log(short type, String message, Throwable t) {
                messages.add(message);
            }

            @Override
            public void error(Object message) {
                messages.add(message.toString());
            }
            @Override
            public void warn(Object message) {
                super.warn(message.toString());
            }
            @Override
            public void info(Object message) {
                messages.add(message.toString());
            }
        };
    }

    // End LogFactory implementation
}