/*
 * 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 java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.opendaylight.yangtools.yang.common.QName;
import org.opendaylight.yangtools.yang.model.api.GroupingDefinition;
import org.opendaylight.yangtools.yang.model.api.SchemaPath;
import org.opendaylight.yangtools.yang.model.api.UnknownSchemaNode;
import org.opendaylight.yangtools.yang.parser.builder.api.Builder;
import org.opendaylight.yangtools.yang.parser.builder.api.DataSchemaNodeBuilder;
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.AbstractDocumentedDataNodeContainer;
import org.opendaylight.yangtools.yang.parser.builder.util.AbstractDocumentedDataNodeContainerBuilder;

public final class GroupingBuilderImpl extends AbstractDocumentedDataNodeContainerBuilder implements GroupingBuilder {
    private GroupingDefinitionImpl instance;
    // SchemaNode args
    private SchemaPath schemaPath;
    // DataSchemaNode args
    private boolean addedByUses;

    public GroupingBuilderImpl(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 GroupingBuilderImpl(final String moduleName, final int line, final QName qname, final SchemaPath path,
            final GroupingDefinition base) {
        super(moduleName, line, base.getQName(), Preconditions.checkNotNull(path, "Schema Path must not be null"), base);
        schemaPath = path;
        addedByUses = base.isAddedByUses();
        addedUnknownNodes.addAll(BuilderUtils.wrapUnknownNodes(moduleName, line, base.getUnknownSchemaNodes(), path,
                qname));
    }

    @Override
    public GroupingDefinition build() {
        if (instance != null) {
            return instance;
        }
        buildChildren();
        instance = new GroupingDefinitionImpl(qname, schemaPath, this);
        instance.addedByUses = addedByUses;

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

        return instance;
    }

    @Override
    public Set<DataSchemaNodeBuilder> instantiateChildNodes(final Builder newParent) {
        final Set<DataSchemaNodeBuilder> nodes = new HashSet<>();
        for (DataSchemaNodeBuilder node : getChildNodeBuilders()) {
            DataSchemaNodeBuilder copy = CopyUtils.copy(node, newParent, true);
            BuilderUtils.setNodeAddedByUses(copy);
            nodes.add(copy);
        }
        return nodes;
    }

    @Override
    public Set<TypeDefinitionBuilder> instantiateTypedefs(final Builder newParent) {
        final Set<TypeDefinitionBuilder> nodes = new HashSet<>();
        for (TypeDefinitionBuilder node : getTypeDefinitionBuilders()) {
            TypeDefinitionBuilder copy = CopyUtils.copy(node, newParent, true);
            nodes.add(copy);
        }
        return nodes;
    }

    @Override
    public Set<GroupingBuilder> instantiateGroupings(final Builder newParent) {
        final Set<GroupingBuilder> nodes = new HashSet<>();
        for (GroupingBuilder node : getGroupingBuilders()) {
            GroupingBuilder copy = CopyUtils.copy(node, newParent, true);
            copy.setAddedByUses(true);
            for (DataSchemaNodeBuilder childNode : copy.getChildNodeBuilders()) {
                BuilderUtils.setNodeAddedByUses(childNode);
            }
            nodes.add(copy);
        }
        return nodes;
    }

    @Override
    public Set<UnknownSchemaNodeBuilder> instantiateUnknownNodes(final Builder newParent) {
        final Set<UnknownSchemaNodeBuilder> nodes = new HashSet<>();
        for (UnknownSchemaNodeBuilder node : addedUnknownNodes) {
            UnknownSchemaNodeBuilderImpl copy = CopyUtils.copy(node, newParent, true);
            copy.setAddedByUses(true);
            nodes.add(copy);
        }
        return nodes;
    }

    @Override
    public SchemaPath getPath() {
        return schemaPath;
    }

    @Override
    public void setPath(final SchemaPath path) {
        this.schemaPath = path;
    }

    @Override
    public boolean isAddedByUses() {
        return addedByUses;
    }

    @Override
    public void setAddedByUses(final boolean addedByUses) {
        this.addedByUses = addedByUses;
    }

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

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

    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        if (!super.equals(obj)) {
            return false;
        }
        final GroupingBuilderImpl other = (GroupingBuilderImpl) obj;
        if (getParent() == null) {
            if (other.getParent() != null) {
                return false;
            }
        } else if (!getParent().equals(other.getParent())) {
            return false;
        }
        if (schemaPath == null) {
            if (other.schemaPath != null) {
                return false;
            }
        } else if (!schemaPath.equals(other.schemaPath)) {
            return false;
        }
        return true;
    }

    @Override
    protected String getStatementName() {
        return "grouping";
    }

    private static final class GroupingDefinitionImpl extends AbstractDocumentedDataNodeContainer implements
    GroupingDefinition {
        private final QName qname;
        private final SchemaPath path;

        private boolean addedByUses;
        private ImmutableList<UnknownSchemaNode> unknownNodes;

        private GroupingDefinitionImpl(final QName qname, final SchemaPath path, final GroupingBuilderImpl builder) {
            super(builder);
            this.qname = qname;
            this.path = path;
        }

        @Override
        public QName getQName() {
            return qname;
        }

        @Override
        public SchemaPath getPath() {
            return path;
        }

        @Override
        public boolean isAddedByUses() {
            return addedByUses;
        }

        @Override
        public List<UnknownSchemaNode> getUnknownSchemaNodes() {
            return unknownNodes;
        }

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

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

        @Override
        public String toString() {
            StringBuilder sb = new StringBuilder(GroupingDefinitionImpl.class.getSimpleName());
            sb.append("[");
            sb.append("qname=").append(qname);
            sb.append("]");
            return sb.toString();
        }
    }

}