/*
 * Copyright (c) 2021 PANTHEON.tech, s.r.o. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.mdsal.binding.generator.impl.reactor;

import static com.google.common.base.Verify.verify;

import java.util.List;
import org.opendaylight.mdsal.binding.generator.impl.rt.DefaultGroupingRuntimeType;
import org.opendaylight.mdsal.binding.model.api.GeneratedType;
import org.opendaylight.mdsal.binding.model.api.type.builder.GeneratedTypeBuilder;
import org.opendaylight.mdsal.binding.model.api.type.builder.GeneratedTypeBuilderBase;
import org.opendaylight.mdsal.binding.model.ri.BindingTypes;
import org.opendaylight.mdsal.binding.runtime.api.AugmentRuntimeType;
import org.opendaylight.mdsal.binding.runtime.api.GroupingRuntimeType;
import org.opendaylight.mdsal.binding.runtime.api.RuntimeType;
import org.opendaylight.yangtools.yang.model.api.stmt.GroupingEffectiveStatement;
import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack;

/**
 * Generator corresponding to a {@code grouping} statement.
 */
final class GroupingGenerator extends AbstractCompositeGenerator<GroupingEffectiveStatement, GroupingRuntimeType> {
    GroupingGenerator(final GroupingEffectiveStatement statement, final AbstractCompositeGenerator<?, ?> parent) {
        super(statement, parent);
    }

    @Override
    StatementNamespace namespace() {
        return StatementNamespace.GROUPING;
    }

    @Override
    void pushToInference(final SchemaInferenceStack dataTree) {
        dataTree.enterGrouping(statement().argument());
    }

    @Override
    GeneratedType createTypeImpl(final TypeBuilderFactory builderFactory) {
        final GeneratedTypeBuilder builder = builderFactory.newGeneratedTypeBuilder(typeName());
        builder.addImplementsType(BindingTypes.DATA_OBJECT);
        narrowImplementedInterface(builder);
        addUsesInterfaces(builder, builderFactory);
        addGetterMethods(builder, builderFactory);

        final ModuleGenerator module = currentModule();
        module.addQNameConstant(builder, statement().argument());

        annotateDeprecatedIfNecessary(builder);
        builderFactory.addCodegenInformation(module, statement(), builder);

        return builder.build();
    }

    @Override
    void addAsGetterMethod(final GeneratedTypeBuilderBase<?> builder, final TypeBuilderFactory builderFactory) {
        // groupings are a separate concept
    }

    @Override
    CompositeRuntimeTypeBuilder<GroupingEffectiveStatement, GroupingRuntimeType> createBuilder(
            final GroupingEffectiveStatement statement) {
        return new CompositeRuntimeTypeBuilder<>(statement) {
            @Override
            GroupingRuntimeType build(final GeneratedType type, final GroupingEffectiveStatement statement,
                    final List<RuntimeType> children, final List<AugmentRuntimeType> augments) {
                // Groupings cannot be targeted by 'augment'
                verify(augments.isEmpty(), "Unexpected augments %s", augments);
                return new DefaultGroupingRuntimeType(type, statement, children);
            }
        };
    }

}