/**
 * Copyright 2011-2015 John Ericksen
 *
 * 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.androidtransfuse.gen.variableBuilder;

import com.sun.codemodel.JExpression;
import org.androidtransfuse.gen.InjectionBuilderContext;
import org.androidtransfuse.gen.InjectionExpressionBuilder;
import org.androidtransfuse.gen.variableDecorator.TypedExpressionFactory;
import org.androidtransfuse.model.InjectionNode;
import org.androidtransfuse.model.InjectionNodeLogger;
import org.androidtransfuse.model.TypedExpression;

import javax.inject.Inject;

/**
 * @author John Ericksen
 */
public class ProviderVariableBuilder implements VariableBuilder {

    private static final String PROVIDER_METHOD = "get";

    private final InjectionNode providerInjectionNode;
    private final InjectionExpressionBuilder injectionExpressionBuilder;
    private final TypedExpressionFactory typedExpressionFactory;

    @Inject
    public ProviderVariableBuilder(/*@Assisted*/ InjectionNode providerInjectionNode,
                                   InjectionExpressionBuilder injectionExpressionBuilder, TypedExpressionFactory typedExpressionFactory) {
        this.providerInjectionNode = providerInjectionNode;
        this.injectionExpressionBuilder = injectionExpressionBuilder;
        this.typedExpressionFactory = typedExpressionFactory;
    }

    @Override
    public TypedExpression buildVariable(InjectionBuilderContext injectionBuilderContext, InjectionNode injectionNode) {

        TypedExpression providerVar = injectionExpressionBuilder.buildVariable(injectionBuilderContext, providerInjectionNode);

        JExpression expression = providerVar.getExpression().invoke(PROVIDER_METHOD);

        return typedExpressionFactory.build(injectionNode.getASTType(), expression);
    }

    public InjectionNode getProviderInjectionNode() {
        return providerInjectionNode;
    }

    @Override
    public void log(InjectionNodeLogger logger) {
        logger.append(this.getClass().getName());
    }
}
