/*
 * Licensed 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
 *
 *  https://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.
 *
 * Other licenses:
 * -----------------------------------------------------------------------------
 * Commercial licenses for this work are available. These replace the above
 * Apache-2.0 license and offer limited warranties, support, maintenance, and
 * commercial database integrations.
 *
 * For more information, please visit: https://www.jooq.org/legal/licensing
 *
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package org.jooq.impl;

import static org.jooq.impl.DSL.*;
import static org.jooq.impl.Internal.*;
import static org.jooq.impl.Keywords.*;
import static org.jooq.impl.Names.*;
import static org.jooq.impl.SQLDataType.*;
import static org.jooq.impl.Tools.*;
import static org.jooq.impl.Tools.BooleanDataKey.*;
import static org.jooq.impl.Tools.ExtendedDataKey.*;
import static org.jooq.impl.Tools.SimpleDataKey.*;
import static org.jooq.SQLDialect.*;

import org.jooq.*;
import org.jooq.Function1;
import org.jooq.Record;
import org.jooq.conf.ParamType;
import org.jooq.tools.StringUtils;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Objects;
import java.util.Set;



/**
 * The <code>EQ</code> statement.
 */
@SuppressWarnings({ "rawtypes", "unchecked", "unused" })
final class Eq<T>
extends
    AbstractCondition
implements
    QOM.Eq<T>
{

    final Field<T> arg1;
    final Field<T> arg2;

    Eq(
        Field<T> arg1,
        Field<T> arg2
    ) {

        this.arg1 = nullableIf(false, Tools.nullSafe(arg1, arg2.getDataType()));
        this.arg2 = nullableIf(false, Tools.nullSafe(arg2, arg1.getDataType()));
    }

    // -------------------------------------------------------------------------
    // XXX: QueryPart API
    // -------------------------------------------------------------------------



    static final Clause[] CLAUSES = { Clause.CONDITION, Clause.CONDITION_COMPARISON };

    @Override
    public final void accept(Context<?> ctx) {







        Eq.acceptCompareCondition(ctx,
            this,
            arg1,
            org.jooq.Comparator.EQUALS,
            arg2,
            RowN::eq,
            RowN::eq,
            (c, a1, a2) -> {
                switch (c.family()) {








                    default:
                        return c.visit(a1).sql(" = ").visit(a2);
                }
            }
        );
    }

    @Override
    public final Clause[] clauses(Context<?> ctx) {
        return Eq.CLAUSES;
    }

    /**
     * @deprecated - [#12425] After the QOM refactoring, this should be improved
     */
    @Deprecated
    static final <T> void acceptCompareCondition(
        Context<?> ctx,
        AbstractCondition condition,
        Field<T> arg1,
        org.jooq.Comparator op,
        Field<T> arg2,
        Function2<RowN, Select<?>, Condition> compareRowSubquery,
        Function2<RowN, RowN, Condition> compareRowRow,
        Function3<? super Context<?>, ? super Field<?>, ? super Field<?>, ? extends Context<?>> acceptDefault
    ) {
        DataType<T> t1 = arg1.getDataType();
        DataType<T> t2 = arg2.getDataType();
        boolean field1Embeddable = t1.isEmbeddable();
        SelectQueryImpl<?> s;

        if (field1Embeddable && arg2 instanceof ScalarSubquery)
            ctx.visit(compareRowSubquery.apply(row(embeddedFields(arg1)), ((ScalarSubquery<?>) arg2).query));
        else if (field1Embeddable && t2.isEmbeddable())
            ctx.visit(compareRowRow.apply(row(embeddedFields(arg1)), row(embeddedFields(arg2))));
        else if ((op == org.jooq.Comparator.IN || op == org.jooq.Comparator.NOT_IN)
            && (s = Transformations.subqueryWithLimit(arg2)) != null
            && Transformations.NO_SUPPORT_IN_LIMIT.contains(ctx.dialect())) {
            ctx.visit(arg1.compare(op, (Select) select(asterisk()).from(s.asTable("t"))));
        }
        else if (t1.isMultiset() && t2.isMultiset() && !Boolean.TRUE.equals(ctx.data(DATA_MULTISET_CONDITION)))
            ctx.data(DATA_MULTISET_CONDITION, true, c -> c.visit(condition));

















        else if (arg1 instanceof Array && ((Array<?>) arg1).fields.fields.length == 0)
            ctx.data(ExtendedDataKey.DATA_EMPTY_ARRAY_BASE_TYPE, t2.getArrayComponentDataType(), c -> acceptDefault.apply(c, arg1, arg2));
        else if (arg2 instanceof Array && ((Array<?>) arg2).fields.fields.length == 0)
            ctx.data(ExtendedDataKey.DATA_EMPTY_ARRAY_BASE_TYPE, t1.getArrayComponentDataType(), c -> acceptDefault.apply(c, arg1, arg2));
        else
            acceptDefault.apply(ctx, arg1, arg2);
    }

    /**
     * @deprecated - [#12425] After the QOM refactoring, this should be improved
     */
    @Deprecated
    static final org.jooq.Comparator comparator(Condition condition) {
        if (condition instanceof Eq)
            return org.jooq.Comparator.EQUALS;
        else if (condition instanceof Ne)
            return org.jooq.Comparator.NOT_EQUALS;
        else if (condition instanceof Gt)
            return org.jooq.Comparator.GREATER;
        else if (condition instanceof Ge)
            return org.jooq.Comparator.GREATER_OR_EQUAL;
        else if (condition instanceof Lt)
            return org.jooq.Comparator.LESS;
        else if (condition instanceof Le)
            return org.jooq.Comparator.LESS_OR_EQUAL;
        else
            return null;
    }












    // -------------------------------------------------------------------------
    // XXX: Query Object Model
    // -------------------------------------------------------------------------

    @Override
    public final Field<T> $arg1() {
        return arg1;
    }

    @Override
    public final Field<T> $arg2() {
        return arg2;
    }

    @Override
    public final QOM.Eq<T> $arg1(Field<T> newValue) {
        return $constructor().apply(newValue, $arg2());
    }

    @Override
    public final QOM.Eq<T> $arg2(Field<T> newValue) {
        return $constructor().apply($arg1(), newValue);
    }

    @Override
    public final Function2<? super Field<T>, ? super Field<T>, ? extends QOM.Eq<T>> $constructor() {
        return (a1, a2) -> new Eq<>(a1, a2);
    }

    // -------------------------------------------------------------------------
    // XXX: The Object API
    // -------------------------------------------------------------------------

    @Override
    public boolean equals(Object that) {
        if (that instanceof QOM.Eq<?> o) {
            return
                Objects.equals($arg1(), o.$arg1()) &&
                Objects.equals($arg2(), o.$arg2())
            ;
        }
        else
            return super.equals(that);
    }
}
