/**
 * Copyright (c) 2009-2010 Thales Corporate Services S.A.S.
 * 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
 * 
 * Contributors:
 * Thales Corporate Services S.A.S - initial API and implementation
 */
package org.eclipse.egf.producer.internal.context;

import java.util.Collection;

import org.eclipse.egf.common.helper.EMFHelper;
import org.eclipse.egf.core.producer.InvocationException;
import org.eclipse.egf.core.producer.context.IProductionContext;
import org.eclipse.egf.core.producer.l10n.CoreProducerMessages;
import org.eclipse.egf.core.session.ProjectBundleSession;
import org.eclipse.egf.model.fcore.Contract;
import org.eclipse.egf.model.fcore.ContractMode;
import org.eclipse.egf.model.fcore.FactoryComponent;
import org.eclipse.egf.model.fcore.InvocationContract;
import org.eclipse.egf.model.fcore.Orchestration;
import org.eclipse.egf.model.fcore.OrchestrationParameter;
import org.eclipse.egf.producer.context.IOrchestrationProductionContext;
import org.eclipse.osgi.util.NLS;

/**
 * @author Xavier Maysonnave
 * 
 */
public abstract class OrchestrationProductionContext<P extends Orchestration> extends ModelElementProductionContext<P, OrchestrationParameter> implements IOrchestrationProductionContext<P> {

    public OrchestrationProductionContext(ProjectBundleSession projectBundleSession, P element, String name) {
        super(projectBundleSession, element, name);
    }

    public OrchestrationProductionContext(IProductionContext<FactoryComponent, Contract> parent, ProjectBundleSession projectBundleSession, P element, String name) {
        super(parent, projectBundleSession, element, name);
    }

    @Override
    public boolean isSetAtRuntime(Object key) throws InvocationException {
        // Locate an OrchestrationParameter, just do it for key type checking
        getOrchestrationParameter(key, getInputValueKeys(), getName(), __inputMode);
        InvocationContract invocationContract = (InvocationContract) key;
        // Always propagate, An InvocationContract shouldn't be in an OrchestrationParameter
        // and in an FactoryComponentContract
        if (invocationContract.getFactoryComponentContract() != null) {
            if (getParent() != null && invocationContract.getFactoryComponentContract().getMode() != ContractMode.OUT) {
                return getParent().isSetAtRuntime(invocationContract);
            }
        }
        return false;
    }

    @Override
    public Class<?> getInputValueType(Object key) throws InvocationException {
        // Locate an OrchestrationParameter, it could be null, just do it for key type checking
        OrchestrationParameter orchestrationParameter = getOrchestrationParameter(key, getInputValueKeys(), getName(), __inputMode);
        InvocationContract invocationContract = (InvocationContract) key;
        Class<?> valueType = null;
        // Always propagate, An InvocationContract shouldn't be in an OrchestrationParameter
        // and in an FactoryComponent Contract
        if (invocationContract.getFactoryComponentContract() != null) {
            if (getParent() != null && invocationContract.getFactoryComponentContract().getMode() != ContractMode.OUT) {
                valueType = getParent().getInputValueType(invocationContract);
            }
        } else {
            // Shouldn't be null at this stage
            if (orchestrationParameter == null) {
                throw new InvocationException(NLS.bind(CoreProducerMessages.ProductionContext_null_key, __inputMode, getName()));
            }
            // Looking for a local Value Type
            Data data = _inputDatas.get(orchestrationParameter);
            if (data != null) {
                valueType = data.getType();
            }
        }
        return valueType;
    }

    @Override
    public <R> R getInputValue(Object key, Class<R> clazz) throws InvocationException {
        // Locate an OrchestrationParameter, it could be null, just do it for key type checking
        OrchestrationParameter orchestrationParameter = getOrchestrationParameter(key, getInputValueKeys(), getName(), __inputMode);
        InvocationContract invocationContract = (InvocationContract) key;
        R value = null;
        // Always propagate, An InvocationContract shouldn't be in an OrchestrationParameter
        // and in an FactoryComponent Contract
        if (invocationContract.getFactoryComponentContract() != null) {
            if (getParent() != null && invocationContract.getFactoryComponentContract().getMode() != ContractMode.OUT) {
                value = getParent().getInputValue(invocationContract, clazz);
            }
        } else {
            // Shouldn't be null at this stage
            if (orchestrationParameter == null) {
                throw new InvocationException(NLS.bind(CoreProducerMessages.ProductionContext_null_key, __inputMode, getName()));
            }
            // Looking for a local value
            Data inputData = _inputDatas.get(orchestrationParameter);
            if (inputData != null) {
                value = getValue(orchestrationParameter, clazz, inputData, __inputMode);
            }
        }
        return value;
    }

    @Override
    public Class<?> getOutputValueType(Object key) throws InvocationException {
        // Locate an OrchestrationParameter, it should be null, just do it for key type checking
        getOrchestrationParameter(key, getOutputValueKeys(), getName(), __outputMode);
        InvocationContract invocationContract = (InvocationContract) key;
        Class<?> valueType = null;
        // Always propagate, OrchestrationParameter doesn't hold Output Values
        if (invocationContract.getFactoryComponentContract() != null) {
            if (getParent() != null && invocationContract.getFactoryComponentContract().getMode() != ContractMode.IN) {
                valueType = getParent().getOutputValueType(invocationContract);
            }
        }
        return valueType;
    }

    @Override
    public <R> R getOutputValue(Object key, Class<R> clazz) throws InvocationException {
        // Locate an OrchestrationParameter, it should be null, just do it for key type checking
        getOrchestrationParameter(key, getOutputValueKeys(), getName(), __outputMode);
        InvocationContract invocationContract = (InvocationContract) key;
        R value = null;
        // Always propagate, OrchestrationParameter doesn't hold Output Values
        if (invocationContract.getFactoryComponentContract() != null) {
            if (getParent() != null && invocationContract.getFactoryComponentContract().getMode() != ContractMode.IN) {
                value = getParent().getOutputValue(invocationContract, clazz);
            }
        }
        return value;
    }

    @Override
    public void setOutputValue(Object key, Object value) throws InvocationException {
        // Locate an OrchestrationParameter, it should be null, just do it for key type checking
        getOrchestrationParameter(key, getOutputValueKeys(), getName(), __outputMode);
        InvocationContract invocationContract = (InvocationContract) key;
        // Always propagate, OrchestrationParameter doesn't hold Output Values
        if (invocationContract.getFactoryComponentContract() != null) {
            if (getParent() != null && invocationContract.getFactoryComponentContract().getMode() != ContractMode.IN) {
                getParent().setOutputValue(invocationContract, value);
            }
        }
    }

    private static OrchestrationParameter getOrchestrationParameter(Object key, Collection<OrchestrationParameter> keys, String name, String mode) throws InvocationException {
        // Usual Tests
        if (key == null) {
            throw new InvocationException(NLS.bind(CoreProducerMessages.ProductionContext_null_key, mode, name));
        }
        if (key instanceof InvocationContract == false) {
            throw new InvocationException(NLS.bind(CoreProducerMessages.ProductionContext_wrong_type, new Object[] {
                    InvocationContract.class.getName(), mode, EMFHelper.getText(key), key.getClass().getName(), name
            }));
        }
        // Locate OrchestrationParameter
        OrchestrationParameter orchestrationParameter = null;
        for (OrchestrationParameter innerOrchestrationParameter : keys) {
            if (innerOrchestrationParameter.getInvocationContracts().contains(key)) {
                orchestrationParameter = innerOrchestrationParameter;
                break;
            }
        }
        // Return
        return orchestrationParameter;
    }

}