/*
 * Copyright 2012 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.drools.workbench.models.datamodel.rule;

public class SingleFieldConstraintEBLeftSide extends SingleFieldConstraint {

    public SingleFieldConstraintEBLeftSide() {
        super();
    }

    public SingleFieldConstraintEBLeftSide( String factType,
                                            String fieldName,
                                            String fieldType,
                                            FieldConstraint parent ) {
        super( factType,
               fieldName,
               fieldType,
               parent );
    }

    public SingleFieldConstraintEBLeftSide( String field ) {
        super( field );
    }

    private ExpressionFormLine expLeftSide = new ExpressionFormLine();

    /**
     * Returns true of there is a field binding.
     */
    public boolean isBound() {
        return expLeftSide != null && expLeftSide.isBound();
    }

    public ExpressionFormLine getExpressionLeftSide() {
        return expLeftSide;
    }

    public void setExpressionLeftSide( ExpressionFormLine expression ) {
        this.expLeftSide = expression;
    }

    @Override
    public String getFieldBinding() {
        return getExpressionLeftSide().getBinding();
    }

    @Override
    public void setFieldBinding( String fieldBinding ) {
        getExpressionLeftSide().setBinding( fieldBinding );
    }

    @Override
    public String getFieldType() {
        return getExpressionLeftSide().getClassType();
    }

    @Override
    public String getFieldName() {
        return getExpressionLeftSide().getFieldName();
    }

    /**
     * This adds a new connective.
     */
    @Override
    public void addNewConnective() {

        String factType = getExpressionLeftSide().getPreviousGenericType();
        if ( factType == null ) {
            factType = getExpressionLeftSide().getGenericType();
        }
        String fieldName = getExpressionLeftSide().getFieldName();
        String fieldType = getExpressionLeftSide().getGenericType();

        if ( this.getConnectives() == null ) {
            this.setConnectives( new ConnectiveConstraint[]{ new ConnectiveConstraint( factType,
                                                                                       fieldName,
                                                                                       fieldType ) } );
        } else {
            final ConnectiveConstraint[] newList = new ConnectiveConstraint[ this.getConnectives().length + 1 ];
            for ( int i = 0; i < this.getConnectives().length; i++ ) {
                newList[ i ] = this.getConnectives()[ i ];
            }
            newList[ this.getConnectives().length ] = new ConnectiveConstraint( factType,
                                                                                fieldName,
                                                                                fieldType );
            this.setConnectives( newList );
        }
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        if (!super.equals(o)) return false;

        SingleFieldConstraintEBLeftSide that = (SingleFieldConstraintEBLeftSide) o;

        if (expLeftSide != null ? !expLeftSide.equals(that.expLeftSide) : that.expLeftSide != null) return false;

        return true;
    }

    @Override
    public int hashCode() {
        int result = super.hashCode();
        result = ~~result;
        result = 31 * result + (expLeftSide != null ? expLeftSide.hashCode() : 0);
        result = ~~result;
        return result;
    }
}