/**
 * Copyright (C) 2009-2013 FoundationDB, LLC
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.foundationdb.sql.optimizer;

import com.foundationdb.junit.SelectedParameterizedRunner;
import com.foundationdb.sql.NamedParamsTestBase;
import com.foundationdb.sql.TestBase;

import com.foundationdb.sql.parser.DMLStatementNode;
import com.foundationdb.sql.parser.StatementNode;

import com.foundationdb.junit.Parameterization;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;

import static org.junit.Assert.*;

import java.io.File;
import java.util.Collection;

@RunWith(SelectedParameterizedRunner.class)
public class SubqueryFlattenerTest extends OptimizerTestBase 
                                   implements TestBase.GenerateAndCheckResult
{
    public static final File RESOURCE_DIR = 
        new File(OptimizerTestBase.RESOURCE_DIR, "flatten");

    @Parameterized.Parameters(name="{0}")
    public static Collection<Object[]> statements() throws Exception {
        return sqlAndExpected(RESOURCE_DIR);
    }

    public SubqueryFlattenerTest(String caseName, String sql, 
                                 String expected, String error) {
        super(caseName, sql, expected, error);
    }

    @Before
    public void loadDDL() throws Exception {
        loadSchema(new File(RESOURCE_DIR, "schema.ddl"));
        ((BoundNodeToString)unparser).setUseBindings(true);
    }

    @Test
    public void testFlatten() throws Exception {
        generateAndCheckResult();
    }

    @Override
    public String generateResult() throws Exception {
        StatementNode stmt = parser.parseStatement(sql);
        binder.bind(stmt);
        stmt = booleanNormalizer.normalize(stmt);
        typeComputer.compute(stmt);
        stmt = subqueryFlattener.flatten((DMLStatementNode)stmt);
        return unparser.toString(stmt);
    }

    @Override
    public void checkResult(String result) {
        assertEquals(caseName, expected.trim(), result);
    }

}