/*
 * 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.ConstraintDefinition;
import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
import org.opendaylight.yangtools.yang.model.api.SchemaPath;
import org.opendaylight.yangtools.yang.model.api.Status;
import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
import org.opendaylight.yangtools.yang.model.api.UnknownSchemaNode;
import org.opendaylight.yangtools.yang.parser.builder.api.AbstractTypeAwareBuilder;
import org.opendaylight.yangtools.yang.parser.builder.api.DataSchemaNodeBuilder;
import org.opendaylight.yangtools.yang.parser.util.YangParseException;

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

public final class LeafSchemaNodeBuilder extends AbstractTypeAwareBuilder implements DataSchemaNodeBuilder {
    private LeafSchemaNodeImpl instance;
    private String defaultStr;
    private String unitsStr;
    // SchemaNode args
    private SchemaPath schemaPath;
    private String description;
    private String reference;
    private Status status = Status.CURRENT;
    // DataSchemaNode args
    private boolean augmenting;
    private boolean addedByUses;
    private boolean configuration;
    private final ConstraintsBuilder constraints;

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

    public LeafSchemaNodeBuilder(String moduleName, int line, QName qname, SchemaPath path, LeafSchemaNode base) {
        super(moduleName, line, qname);
        this.schemaPath = path;
        constraints = new ConstraintsBuilder(moduleName, line, base.getConstraints());

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

        defaultStr = base.getDefault();
        unitsStr = base.getUnits();
    }

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

        instance = new LeafSchemaNodeImpl(qname, schemaPath);

        instance.description = description;
        instance.reference = reference;
        instance.status = status;
        instance.augmenting = augmenting;
        instance.addedByUses = addedByUses;
        instance.configuration = configuration;
        instance.constraintsDef = constraints.build();
        instance.defaultStr = defaultStr;
        instance.unitsStr = unitsStr;

        if (type == null && typedef == null) {
            throw new YangParseException(moduleName, line, "Failed to resolve leaf type.");
        }

        // TYPE
        if (type == null) {
            instance.type = typedef.build();
        } else {
            instance.type = type;
        }

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

        return instance;
    }

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

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

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

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

    @Override
    public void setDescription(final String description) {
        this.description = description;
    }

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

    @Override
    public void setReference(final String reference) {
        this.reference = reference;
    }

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

    @Override
    public void setStatus(Status status) {
        this.status = Preconditions.checkNotNull(status, "status cannot be null");
    }

    @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 boolean isConfiguration() {
        return configuration;
    }

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

    public String getDefaultStr() {
        return defaultStr;
    }

    public void setDefaultStr(String defaultStr) {
        this.defaultStr = defaultStr;
    }

    public String getUnits() {
        return unitsStr;
    }

    public void setUnits(String unitsStr) {
        this.unitsStr = unitsStr;
    }

    @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(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        LeafSchemaNodeBuilder other = (LeafSchemaNodeBuilder) obj;
        if (schemaPath == null) {
            if (other.schemaPath != null) {
                return false;
            }
        } else if (!schemaPath.equals(other.schemaPath)) {
            return false;
        }
        if (parentBuilder == null) {
            if (other.parentBuilder != null) {
                return false;
            }
        } else if (!parentBuilder.equals(other.parentBuilder)) {
            return false;
        }
        return true;
    }

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

    private static final class LeafSchemaNodeImpl implements LeafSchemaNode {
        private final QName qname;
        private final SchemaPath path;
        private String description;
        private String reference;
        private Status status;
        private boolean augmenting;
        private boolean addedByUses;
        private boolean configuration;
        private ConstraintDefinition constraintsDef;
        private TypeDefinition<?> type;
        private ImmutableList<UnknownSchemaNode> unknownNodes;
        private String defaultStr;
        private String unitsStr;

        private LeafSchemaNodeImpl(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 boolean isConfiguration() {
            return configuration;
        }

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

        @Override
        public TypeDefinition<?> getType() {
            return type;
        }

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

        @Override
        public String getDefault() {
            return defaultStr;
        }

        @Override
        public String getUnits() {
            return unitsStr;
        }

        @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(Object obj) {
            if (this == obj) {
                return true;
            }
            if (obj == null) {
                return false;
            }
            if (getClass() != obj.getClass()) {
                return false;
            }
            LeafSchemaNodeImpl other = (LeafSchemaNodeImpl) 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(LeafSchemaNodeImpl.class.getSimpleName());
            sb.append("[");
            sb.append("qname=" + qname);
            sb.append(", path=" + path);
            sb.append("]");
            return sb.toString();
        }
    }

}