/*
 * Licensed to Crate under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.  Crate 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.
 *
 * However, if you have executed another commercial license agreement
 * with Crate these terms will supersede the license and you may use the
 * software solely pursuant to the terms of the relevant commercial
 * agreement.
 */

package io.crate.planner;

import com.google.common.collect.ImmutableList;
import io.crate.planner.node.management.ExplainPlan;
import io.crate.test.integration.CrateDummyClusterServiceUnitTest;
import io.crate.testing.SQLExecutor;
import org.junit.Before;
import org.junit.Test;

import java.util.List;
import java.util.Map;

import static org.hamcrest.Matchers.greaterThan;

public class ExplainPlannerTest extends CrateDummyClusterServiceUnitTest {

    private static final List<String> EXPLAIN_TEST_STATEMENTS = ImmutableList.of(
        "select id from sys.cluster",
        "select id from users order by id",
        "select * from users",
        "select count(*) from users",
        "select name, count(distinct id) from users group by name",
        "select avg(id) from users",
        "select * from users where name = (select 'name')"
    );

    private SQLExecutor e;

    @Before
    public void prepare() {
        e = SQLExecutor.builder(clusterService).enableDefaultTables().build();
    }

    @Test
    public void testExplain() throws Exception {
        for (String statement : EXPLAIN_TEST_STATEMENTS) {
            ExplainPlan plan = e.plan("explain " + statement);
            assertNotNull(plan);
            assertNotNull(plan.subPlan());
        }
    }

    @Test
    public void testPrinter() throws Exception {
        for (String statement : EXPLAIN_TEST_STATEMENTS) {
            Plan plan = e.plan(statement);
            Map<String, Object> map = null;
            try {
                map = PlanPrinter.objectMap(plan);
            } catch (Exception e) {
                fail("statement not printable: " + statement);
            }
            assertNotNull(map);
            assertThat(map.size(), greaterThan(0));
        }
    }
}