/*
 * 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 java.util.List;

import org.opendaylight.yangtools.yang.common.QName;
import org.opendaylight.yangtools.yang.model.api.AnyXmlSchemaNode;
import org.opendaylight.yangtools.yang.model.api.ConstraintDefinition;
import org.opendaylight.yangtools.yang.model.api.DerivableSchemaNode;
import org.opendaylight.yangtools.yang.model.api.SchemaPath;
import org.opendaylight.yangtools.yang.model.api.Status;
import org.opendaylight.yangtools.yang.model.api.UnknownSchemaNode;
import org.opendaylight.yangtools.yang.parser.builder.api.ConstraintsBuilder;
import org.opendaylight.yangtools.yang.parser.builder.api.DataSchemaNodeBuilder;
import org.opendaylight.yangtools.yang.parser.builder.api.SchemaNodeBuilder;
import org.opendaylight.yangtools.yang.parser.builder.api.UnknownSchemaNodeBuilder;
import org.opendaylight.yangtools.yang.parser.builder.util.AbstractSchemaNodeBuilder;

import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;

public final class AnyXmlBuilder extends AbstractSchemaNodeBuilder implements DataSchemaNodeBuilder {
    private AnyXmlSchemaNodeImpl instance;

    private boolean augmenting;
    private boolean addedByUses;
    private boolean configuration;
    private AnyXmlSchemaNode originalNode;
    private AnyXmlBuilder originalBuilder;
    private final ConstraintsBuilder constraints;

    public AnyXmlBuilder(final String moduleName, final int line, final QName qname, final SchemaPath path) {
        super(moduleName, line, qname);
        this.schemaPath = path;
        constraints = new ConstraintsBuilderImpl(moduleName, line);
    }

    public AnyXmlBuilder(final String moduleName, final int line, final QName qname, final SchemaPath path,
            final AnyXmlSchemaNode base) {
        super(moduleName, line, qname);
        this.schemaPath = path;
        constraints = new ConstraintsBuilderImpl(moduleName, line, base.getConstraints());

        description = base.getDescription();
        reference = base.getReference();
        status = base.getStatus();
        augmenting = base.isAugmenting();
        addedByUses = base.isAddedByUses();
        originalNode = base;
        configuration = base.isConfiguration();
        unknownNodes.addAll(base.getUnknownSchemaNodes());
    }

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

        instance = new AnyXmlSchemaNodeImpl(qname, schemaPath);

        instance.description = description;
        instance.reference = reference;
        instance.status = status;
        instance.augmenting = augmenting;
        instance.addedByUses = addedByUses;
        instance.configuration = configuration;
        instance.constraintsDef = constraints.toInstance();

        // ORIGINAL NODE
        if (originalNode == null && originalBuilder != null) {
            originalNode = originalBuilder.build();
        }
        instance.original = originalNode;

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

        return instance;
    }

    @Override
    public ConstraintsBuilder getConstraints() {
        return constraints;
    }

    @Override
    public boolean isAugmenting() {
        return augmenting;
    }

    @Override
    public void setAugmenting(final boolean augmenting) {
        this.augmenting = augmenting;
    }

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

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

    @Override
    public AnyXmlBuilder getOriginal() {
        return originalBuilder;
    }

    @Override
    public void setOriginal(final SchemaNodeBuilder builder) {
        Preconditions.checkArgument(builder instanceof AnyXmlBuilder, "Original of anyxml cannot be " + builder);
        this.originalBuilder = (AnyXmlBuilder) builder;
    }

    @Override
    public boolean isConfiguration() {
        return configuration;
    }

    @Override
    public void setConfiguration(final boolean configuration) {
        this.configuration = configuration;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        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;
        }
        AnyXmlBuilder other = (AnyXmlBuilder) obj;
        if (schemaPath == null) {
            if (other.schemaPath != null) {
                return false;
            }
        } else if (!schemaPath.equals(other.schemaPath)) {
            return false;
        }
        if (getParent() == null) {
            if (other.getParent() != null) {
                return false;
            }
        } else if (!getParent().equals(other.getParent())) {
            return false;
        }
        return true;
    }

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

    private static final class AnyXmlSchemaNodeImpl implements AnyXmlSchemaNode, DerivableSchemaNode {
        private final QName qname;
        private final SchemaPath path;
        private String description;
        private String reference;
        private Status status;
        private boolean configuration;
        private AnyXmlSchemaNode original;
        private ConstraintDefinition constraintsDef;
        private boolean augmenting;
        private boolean addedByUses;
        private ImmutableList<UnknownSchemaNode> unknownNodes;

        private AnyXmlSchemaNodeImpl(final QName qname, final SchemaPath path) {
            this.qname = qname;
            this.path = path;
        }

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

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

        @Override
        public String getDescription() {
            return description;
        }

        @Override
        public String getReference() {
            return reference;
        }

        @Override
        public Status getStatus() {
            return status;
        }

        @Override
        public boolean isAugmenting() {
            return augmenting;
        }

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

        @Override
        public Optional<AnyXmlSchemaNode> getOriginal() {
            return Optional.fromNullable(original);
        }

        @Override
        public boolean isConfiguration() {
            return configuration;
        }

        @Override
        public ConstraintDefinition getConstraints() {
            return constraintsDef;
        }

        @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;
            }
            AnyXmlSchemaNodeImpl other = (AnyXmlSchemaNodeImpl) 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(AnyXmlSchemaNodeImpl.class.getSimpleName());
            sb.append("[");
            sb.append("qname=").append(qname);
            sb.append(", path=").append(path);
            sb.append("]");
            return sb.toString();
        }

    }

}