/*
 * 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.
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package org.apache.shardingsphere.sharding.route.engine.condition.generator;

import org.apache.shardingsphere.infra.metadata.database.schema.HashColumn;
import org.apache.shardingsphere.sharding.route.engine.condition.generator.impl.ConditionValueBetweenOperatorGenerator;
import org.apache.shardingsphere.sharding.route.engine.condition.generator.impl.ConditionValueCompareOperatorGenerator;
import org.apache.shardingsphere.sharding.route.engine.condition.generator.impl.ConditionValueInOperatorGenerator;
import org.apache.shardingsphere.sharding.route.engine.condition.value.ShardingConditionValue;
import org.apache.shardingsphere.sql.parser.statement.core.segment.dml.column.ColumnSegment;
import org.apache.shardingsphere.sql.parser.statement.core.segment.dml.expr.BetweenExpression;
import org.apache.shardingsphere.sql.parser.statement.core.segment.dml.expr.BinaryOperationExpression;
import org.apache.shardingsphere.sql.parser.statement.core.segment.dml.expr.ExpressionSegment;
import org.apache.shardingsphere.sql.parser.statement.core.segment.dml.expr.InExpression;
import org.apache.shardingsphere.sql.parser.statement.core.segment.dml.expr.ListExpression;
import org.apache.shardingsphere.sql.parser.statement.core.segment.dml.expr.simple.LiteralExpressionSegment;
import org.apache.shardingsphere.sql.parser.statement.core.segment.dml.expr.simple.ParameterMarkerExpressionSegment;
import org.apache.shardingsphere.sql.parser.statement.core.value.identifier.IdentifierValue;
import org.apache.shardingsphere.timeservice.core.rule.TimestampServiceRule;
import org.junit.jupiter.api.Test;

import java.util.Collections;
import java.util.LinkedList;
import java.util.Optional;

import static org.hamcrest.Matchers.is;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.Mockito.mock;

class ConditionValueGeneratorFactoryTest {
    
    private final HashColumn column = new HashColumn("id", "tbl", false);
    
    @Test
    void assertGenerateBinaryOperationExpression() {
        ConditionValueCompareOperatorGenerator conditionValueCompareOperatorGenerator = new ConditionValueCompareOperatorGenerator();
        BinaryOperationExpression rightValue = new BinaryOperationExpression(0, 0, mock(ColumnSegment.class), new LiteralExpressionSegment(0, 0, 1), "=", null);
        Optional<ShardingConditionValue> actual = conditionValueCompareOperatorGenerator.generate(rightValue, column, new LinkedList<>(), mock(TimestampServiceRule.class));
        Optional<ShardingConditionValue> expected = ConditionValueGeneratorFactory.generate(rightValue, column, new LinkedList<>(), mock(TimestampServiceRule.class));
        assertTrue(actual.isPresent() && expected.isPresent());
        assertThat(actual.get().getTableName(), is(expected.get().getTableName()));
        assertThat(actual.get().getColumnName(), is(expected.get().getColumnName()));
    }
    
    @Test
    void assertGenerateInOperationExpression() {
        ConditionValueInOperatorGenerator conditionValueInOperatorGenerator = new ConditionValueInOperatorGenerator();
        ColumnSegment left = new ColumnSegment(0, 0, new IdentifierValue("id"));
        ListExpression right = new ListExpression(0, 0);
        right.getItems().add(new ParameterMarkerExpressionSegment(0, 0, 0));
        Optional<ShardingConditionValue> actual = conditionValueInOperatorGenerator.generate(
                new InExpression(0, 0, left, right, false), column, Collections.singletonList(1), mock(TimestampServiceRule.class));
        Optional<ShardingConditionValue> expected = ConditionValueGeneratorFactory.generate(
                new InExpression(0, 0, left, right, false), column, Collections.singletonList(1), mock(TimestampServiceRule.class));
        assertTrue(actual.isPresent() && expected.isPresent());
        assertThat(actual.get().getColumnName(), is(expected.get().getColumnName()));
        assertThat(actual.get().getTableName(), is(expected.get().getTableName()));
    }
    
    @Test
    void assertGenerateBetweenExpression() {
        ConditionValueBetweenOperatorGenerator conditionValueBetweenOperatorGenerator = new ConditionValueBetweenOperatorGenerator();
        ExpressionSegment betweenSegment = new LiteralExpressionSegment(0, 0, 1);
        ExpressionSegment andSegment = new LiteralExpressionSegment(0, 0, 2);
        Optional<ShardingConditionValue> actual = conditionValueBetweenOperatorGenerator.generate(
                new BetweenExpression(0, 0, null, betweenSegment, andSegment, false), column, new LinkedList<>(), mock(TimestampServiceRule.class));
        Optional<ShardingConditionValue> expected = ConditionValueGeneratorFactory.generate(
                new BetweenExpression(0, 0, null, betweenSegment, andSegment, false), column, new LinkedList<>(), mock(TimestampServiceRule.class));
        assertTrue(actual.isPresent() && expected.isPresent());
        assertThat(actual.get().getColumnName(), is(expected.get().getColumnName()));
        assertThat(actual.get().getTableName(), is(expected.get().getTableName()));
    }
    
    @Test
    void assertGenerateBinaryOperationIsExpression() {
        ConditionValueCompareOperatorGenerator conditionValueCompareOperatorGenerator = new ConditionValueCompareOperatorGenerator();
        BinaryOperationExpression rightValue = new BinaryOperationExpression(0, 0, mock(ColumnSegment.class), new LiteralExpressionSegment(0, 0, "null"), "IS", null);
        Optional<ShardingConditionValue> actual = conditionValueCompareOperatorGenerator.generate(rightValue, column, new LinkedList<>(), mock(TimestampServiceRule.class));
        Optional<ShardingConditionValue> expected = ConditionValueGeneratorFactory.generate(rightValue, column, new LinkedList<>(), mock(TimestampServiceRule.class));
        assertTrue(actual.isPresent() && expected.isPresent());
        assertThat(actual.get().getTableName(), is(expected.get().getTableName()));
        assertThat(actual.get().getColumnName(), is(expected.get().getColumnName()));
    }
    
    @Test
    void assertGenerateBinaryOperationIsLowerCaseExpression() {
        ConditionValueCompareOperatorGenerator conditionValueCompareOperatorGenerator = new ConditionValueCompareOperatorGenerator();
        BinaryOperationExpression rightValue = new BinaryOperationExpression(0, 0, mock(ColumnSegment.class), new LiteralExpressionSegment(0, 0, "null"), "is", null);
        Optional<ShardingConditionValue> actual = conditionValueCompareOperatorGenerator.generate(rightValue, column, new LinkedList<>(), mock(TimestampServiceRule.class));
        Optional<ShardingConditionValue> expected = ConditionValueGeneratorFactory.generate(rightValue, column, new LinkedList<>(), mock(TimestampServiceRule.class));
        assertTrue(actual.isPresent() && expected.isPresent());
        assertThat(actual.get().getTableName(), is(expected.get().getTableName()));
        assertThat(actual.get().getColumnName(), is(expected.get().getColumnName()));
    }
}
