/*
 * 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.operation.scalar;

import io.crate.analyze.symbol.Literal;
import io.crate.types.ArrayType;
import io.crate.types.DataTypes;
import org.junit.Test;

import static io.crate.testing.SymbolMatchers.isFunction;
import static io.crate.testing.SymbolMatchers.isLiteral;

public class ArrayCatFunctionTest extends AbstractScalarFunctionsTest {

    private static final ArrayType INTEGER_ARRAY_TYPE = new ArrayType(DataTypes.INTEGER);
    private static final ArrayType LONG_ARRAY_TYPE = new ArrayType(DataTypes.LONG);

    @Test
    public void testNormalizeWithValueSymbols() throws Exception {
        assertNormalize("array_cat([10, 20], [10, 30])", isLiteral(new Long[]{10L, 20L, 10L, 30L}));
    }

    @Test
    public void testNormalizeWithRefs() throws Exception {
        assertNormalize("array_cat(long_array, [10, 30])", isFunction(ArrayCatFunction.NAME));
    }

    @Test
    public void testNullArguments() throws Exception {
        expectedException.expect(IllegalArgumentException.class);
        expectedException.expectMessage("Argument 2 of the array_cat function cannot be converted to array");
        assertEvaluate("array_cat([1, 2, 3], null)", null);
    }

    @Test
    public void testZeroArguments() throws Exception {
        expectedException.expect(UnsupportedOperationException.class);
        expectedException.expectMessage("unknown function: array_cat()");
        assertEvaluate("array_cat()", null);
    }

    @Test
    public void testOneArgument() throws Exception {
        expectedException.expect(UnsupportedOperationException.class);
        expectedException.expectMessage("unknown function: array_cat(long_array)");
        assertEvaluate("array_cat([1])", null);
    }

    @Test
    public void testThreeArguments() throws Exception {
        expectedException.expect(UnsupportedOperationException.class);
        expectedException.expectMessage("array_cat(long_array, long_array, long_array)");
        assertEvaluate("array_cat([1], [2], [3])", null);
    }

    @Test
    public void testDifferentConvertableInnerTypes() throws Exception {
        assertEvaluate("array_cat(int_array, long_array)",
            new Object[]{1, 1},
            Literal.of(new Object[]{1}, INTEGER_ARRAY_TYPE),
            Literal.of(new Object[]{1L}, LONG_ARRAY_TYPE));
    }

    @Test
    public void testNullElements() throws Exception {
        assertEvaluate("array_cat(int_array, int_array)",
            new Object[]{1, null, 3, null, 2, 3},
            Literal.of(new Object[]{1, null, 3}, INTEGER_ARRAY_TYPE),
            Literal.of(new Object[]{null, 2, 3}, INTEGER_ARRAY_TYPE));
    }

    @Test
    public void testNullValue() throws Exception {
        assertEvaluate("array_cat(int_array, int_array)",
            new Object[]{1, 2},
            Literal.of(INTEGER_ARRAY_TYPE, null),
            Literal.of(new Object[]{1, 2}, INTEGER_ARRAY_TYPE));
    }

    @Test
    public void testTwoIntegerArguments() throws Exception {
        assertEvaluate("array_cat(int_array, int_array)",
            new Object[]{1, 2, 2, 3},
            Literal.of(new Object[]{1, 2}, INTEGER_ARRAY_TYPE),
            Literal.of(new Object[]{2, 3}, INTEGER_ARRAY_TYPE));
    }

    @Test
    public void testEmptyArrayAndIntegerArray() throws Exception {
        assertEvaluate("array_cat([], int_array)",
            new Object[]{1, 2},
            Literal.of(new Object[]{1, 2}, INTEGER_ARRAY_TYPE));
    }

    @Test
    public void testEmptyArrays() throws Exception {
        expectedException.expect(IllegalArgumentException.class);
        expectedException.expectMessage("One of the arguments of the array_cat function can be of undefined inner type, but not both");
        assertNormalize("array_cat([], [])", null);
    }
}