/*
 * Copyright (c) 2017 Pantheon Technologies, 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.yangtools.yang.parser.rfc7950.stmt.meta;

import com.google.common.annotations.Beta;
import com.google.common.collect.ImmutableList;
import org.eclipse.jdt.annotation.NonNull;
import org.opendaylight.yangtools.yang.common.QName;
import org.opendaylight.yangtools.yang.common.YangConstants;
import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
import org.opendaylight.yangtools.yang.model.api.meta.DeclarationReference;
import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
import org.opendaylight.yangtools.yang.model.api.meta.StatementOrigin;
import org.opendaylight.yangtools.yang.model.api.stmt.InputEffectiveStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.InputStatement;
import org.opendaylight.yangtools.yang.model.ri.stmt.DeclaredStatementDecorators;
import org.opendaylight.yangtools.yang.model.ri.stmt.DeclaredStatements;
import org.opendaylight.yangtools.yang.model.ri.stmt.EffectiveStatements;
import org.opendaylight.yangtools.yang.model.ri.stmt.ImplicitStatements;
import org.opendaylight.yangtools.yang.model.spi.meta.SubstatementIndexingException;
import org.opendaylight.yangtools.yang.parser.api.YangParserConfiguration;
import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Current;
import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;

@Beta
public final class InputStatementSupport
        extends AbstractOperationContainerStatementSupport<InputStatement, InputEffectiveStatement> {
    private static final SubstatementValidator RFC6020_VALIDATOR = SubstatementValidator.builder(YangStmtMapping.INPUT)
        .addAny(YangStmtMapping.ANYXML)
        .addAny(YangStmtMapping.CHOICE)
        .addAny(YangStmtMapping.CONTAINER)
        .addAny(YangStmtMapping.GROUPING)
        .addAny(YangStmtMapping.LEAF)
        .addAny(YangStmtMapping.LEAF_LIST)
        .addAny(YangStmtMapping.LIST)
        .addAny(YangStmtMapping.TYPEDEF)
        .addAny(YangStmtMapping.USES)
        .build();
    private static final SubstatementValidator RFC7950_VALIDATOR = SubstatementValidator.builder(YangStmtMapping.INPUT)
        .addAny(YangStmtMapping.ANYDATA)
        .addAny(YangStmtMapping.ANYXML)
        .addAny(YangStmtMapping.CHOICE)
        .addAny(YangStmtMapping.CONTAINER)
        .addAny(YangStmtMapping.GROUPING)
        .addAny(YangStmtMapping.LEAF)
        .addAny(YangStmtMapping.LEAF_LIST)
        .addAny(YangStmtMapping.LIST)
        .addAny(YangStmtMapping.MUST)
        .addAny(YangStmtMapping.TYPEDEF)
        .addAny(YangStmtMapping.USES)
        .build();

    private InputStatementSupport(final YangParserConfiguration config, final SubstatementValidator validator) {
        super(YangStmtMapping.INPUT, config, validator, YangConstants::operationInputQName);
    }

    public static @NonNull InputStatementSupport rfc6020Instance(final YangParserConfiguration config) {
        return new InputStatementSupport(config, RFC6020_VALIDATOR);
    }

    public static @NonNull InputStatementSupport rfc7950Instance(final YangParserConfiguration config) {
        return new InputStatementSupport(config, RFC7950_VALIDATOR);
    }

    @Override
    protected InputStatement createDeclared(final StmtContext<QName, InputStatement, ?> ctx,
            final ImmutableList<? extends DeclaredStatement<?>> substatements) {
        final StatementOrigin origin = ctx.origin();
        switch (origin) {
            case CONTEXT:
                return ImplicitStatements.createInput(ctx.getArgument(), substatements);
            case DECLARATION:
                return DeclaredStatements.createInput(ctx.getArgument(), substatements);
            default:
                throw new IllegalStateException("Unhandled statement origin " + origin);
        }
    }

    @Override
    protected InputStatement attachDeclarationReference(final InputStatement stmt,
            final DeclarationReference reference) {
        return DeclaredStatementDecorators.decorateInput(stmt, reference);
    }

    @Override
    InputEffectiveStatement copyDeclaredEffective(final int flags, final Current<QName, InputStatement> stmt,
            final InputEffectiveStatement original) {
        return EffectiveStatements.copyInput(original, stmt.effectivePath(), flags);
    }

    @Override
    InputEffectiveStatement copyUndeclaredEffective(final int flags, final Current<QName, InputStatement> stmt,
            final InputEffectiveStatement original) {
        return EffectiveStatements.copyInput(original, stmt.effectivePath(), flags);
    }

    @Override
    InputEffectiveStatement createDeclaredEffective(final int flags, final Current<QName, InputStatement> stmt,
            final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
        try {
            return EffectiveStatements.createInput(stmt.declared(), stmt.effectivePath(), flags, substatements);
        } catch (SubstatementIndexingException e) {
            throw new SourceException(e.getMessage(), stmt, e);
        }
    }

    @Override
    InputEffectiveStatement createUndeclaredEffective(final int flags, final Current<QName, InputStatement> stmt,
            final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
        try {
            return EffectiveStatements.createInput(stmt.effectivePath(), flags, substatements);
        } catch (SubstatementIndexingException e) {
            throw new SourceException(e.getMessage(), stmt, e);
        }
    }
}