/*
 * Copyright (c) 2013 Cisco Systems, Inc. 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.builder.impl;

import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import java.util.HashSet;
import java.util.Set;
import java.util.TreeSet;
import org.opendaylight.yangtools.yang.common.QName;
import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
import org.opendaylight.yangtools.yang.model.api.GroupingDefinition;
import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
import org.opendaylight.yangtools.yang.model.api.SchemaPath;
import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
import org.opendaylight.yangtools.yang.parser.builder.api.GroupingBuilder;
import org.opendaylight.yangtools.yang.parser.builder.api.TypeDefinitionBuilder;
import org.opendaylight.yangtools.yang.parser.builder.api.UnknownSchemaNodeBuilder;
import org.opendaylight.yangtools.yang.parser.builder.util.AbstractSchemaNodeBuilder;
import org.opendaylight.yangtools.yang.parser.builder.util.Comparators;

public final class RpcDefinitionBuilder extends AbstractSchemaNodeBuilder {
    private RpcDefinitionImpl instance;
    private ContainerSchemaNodeBuilder inputBuilder;
    private ContainerSchemaNodeBuilder outputBuilder;
    private final Set<TypeDefinitionBuilder> addedTypedefs = new HashSet<>();
    private final Set<GroupingBuilder> addedGroupings = new HashSet<>();

    RpcDefinitionBuilder(final String moduleName, final int line, final QName qname, final SchemaPath path) {
        super(moduleName, line, qname);
        this.schemaPath = Preconditions.checkNotNull(path, "Schema Path must not be null");
    }

    public ContainerSchemaNodeBuilder getInput() {
        return inputBuilder;
    }

    public ContainerSchemaNodeBuilder getOutput() {
        return outputBuilder;
    }

    @Override
    public RpcDefinition build() {
        if (instance != null) {
            return instance;
        }

        instance = new RpcDefinitionImpl(qname, schemaPath);

        final ContainerSchemaNode input = inputBuilder == null ? null : inputBuilder.build();
        final ContainerSchemaNode output = outputBuilder == null ? null : outputBuilder.build();
        instance.setInput(input);
        instance.setOutput(output);

        instance.description = description;
        instance.reference = reference;
        instance.status = status;

        // TYPEDEFS
        final Set<TypeDefinition<?>> typedefs = new TreeSet<>(Comparators.SCHEMA_NODE_COMP);
        for (TypeDefinitionBuilder entry : addedTypedefs) {
            typedefs.add(entry.build());
        }
        instance.typeDefinitions = ImmutableSet.copyOf(typedefs);

        // GROUPINGS
        final Set<GroupingDefinition> groupings = new TreeSet<>(Comparators.SCHEMA_NODE_COMP);
        for (GroupingBuilder builder : addedGroupings) {
            groupings.add(builder.build());
        }
        instance.groupings = ImmutableSet.copyOf(groupings);

        // UNKNOWN NODES
        for (UnknownSchemaNodeBuilder b : addedUnknownNodes) {
            unknownNodes.add(b.build());
        }
        instance.unknownNodes = ImmutableList.copyOf(unknownNodes);

        return instance;
    }

    void setInput(final ContainerSchemaNodeBuilder inputBuilder) {
        this.inputBuilder = inputBuilder;
    }

    void setOutput(final ContainerSchemaNodeBuilder outputBuilder) {
        this.outputBuilder = outputBuilder;
    }

    public Set<TypeDefinitionBuilder> getTypeDefinitions() {
        return addedTypedefs;
    }

    public void addTypedef(final TypeDefinitionBuilder type) {
        addedTypedefs.add(type);
    }

    public Set<GroupingBuilder> getGroupings() {
        return addedGroupings;
    }

    public void addGrouping(final GroupingBuilder grouping) {
        addedGroupings.add(grouping);
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((qname == null) ? 0 : qname.hashCode());
        result = prime * result + ((schemaPath == null) ? 0 : schemaPath.hashCode());
        return result;
    }

    @Override
    public boolean equals(final Object obj) {
        if (obj == null) {
            return false;
        }
        if (!(obj instanceof RpcDefinitionBuilder)) {
            return false;
        }
        final RpcDefinitionBuilder other = (RpcDefinitionBuilder) obj;
        if (other.qname == null) {
            if (this.qname != null) {
                return false;
            }
        } else if (!other.qname.equals(this.qname)) {
            return false;
        }
        if (other.schemaPath == null) {
            if (this.schemaPath != null) {
                return false;
            }
        } else if (!other.schemaPath.equals(this.schemaPath)) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "rpc " + qname.getLocalName();
    }

}