// ================================================================================================
// 
// This file is part of the CAMPVis Software Framework.
// 
// If not explicitly stated otherwise: Copyright (C) 2012, all rights reserved,
//      Christian Schulte zu Berge <christian.szb@in.tum.de>
//      Chair for Computer Aided Medical Procedures
//      Technische Universität München
//      Boltzmannstr. 3, 85748 Garching b. München, Germany
// For a full list of authors and contributors, please refer to the file "AUTHORS.txt".
// 
// The licensing of this softare is not yet resolved. Until then, redistribution in source or
// binary forms outside the CAMP chair is not permitted, unless explicitly stated in legal form.
// However, the names of the original authors and the above copyright notice must retain in its
// original state in any case.
// 
// Legal disclaimer provided by the BSD license:
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 
// AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
// 
// ================================================================================================

#include "abstractpipeline.h"

#include "tgt/exception.h"
#include "core/pipeline/abstractprocessor.h"
#include "core/tools/job.h"
#include "core/tools/simplejobprocessor.h"
#include <ctime>


namespace campvis {
    const std::string AbstractPipeline::loggerCat_ = "CAMPVis.core.datastructures.AbstractPipeline";

    AbstractPipeline::AbstractPipeline() 
        : HasPropertyCollection()
    {
        _enabled = true;
    }

    AbstractPipeline::~AbstractPipeline() {
    }

    void AbstractPipeline::init() {
        initAllProperties();

        // initialize all processors:
        for (std::vector<AbstractProcessor*>::iterator it = _processors.begin(); it != _processors.end(); ++it) {
            try {
                (*it)->init();
                (*it)->s_invalidated.connect(this, &AbstractPipeline::onProcessorInvalidated);
            }
            catch (tgt::Exception& e) {
                LERROR("Caught Exception during initialization of processor: " << e.what());
            }
        }
    }

    void AbstractPipeline::deinit() {
        deinitAllProperties();

        // deinitialize all processors:
        for (std::vector<AbstractProcessor*>::iterator it = _processors.begin(); it != _processors.end(); ++it) {
            try {
                (*it)->s_invalidated.disconnect(this);
                (*it)->deinit();
            }
            catch (tgt::Exception& e) {
                LERROR("Caught Exception during deinitialization of processor: " << e.what());
            }
        }

        // clear DataContainer
        _data.clear();
    }

    void AbstractPipeline::onPropertyChanged(const AbstractProperty* prop) {
        HasPropertyCollection::onPropertyChanged(prop);
        s_PipelineInvalidated();
    }

    void AbstractPipeline::onProcessorInvalidated(AbstractProcessor* processor) {
        if (processor->getEnabled())
            SimpleJobProc.enqueueJob(makeJob(this, &AbstractPipeline::executeProcessor, processor));

        s_PipelineInvalidated();
    }

    const DataContainer& AbstractPipeline::getDataContainer() const {
        return _data;
    }

    DataContainer& AbstractPipeline::getDataContainer() {
        return _data;
    }

    void AbstractPipeline::executeProcessor(AbstractProcessor* processor) {
        tgtAssert(processor != 0, "Processor must not be 0.");

        if (processor->getEnabled() && !processor->isLocked() && processor->hasInvalidResult()) {
            processor->lockProcessor();
#ifdef CAMPVIS_DEBUG
            clock_t startTime = clock();
#endif
            try {
                processor->process(_data);
            }
            catch (std::exception& e) {
                LERROR("Caught unhandled exception while executing processor " << processor->getName() << ": " << e.what());
            }
            catch (...) {
                LERROR("Caught unhandled exception while executing processor " << processor->getName() << ": unknown exception");
            }

#ifdef CAMPVIS_DEBUG
            clock_t endTime = clock();
#endif
            processor->unlockProcessor();

#ifdef CAMPVIS_DEBUG
            //LDEBUG("Executed processor " << processor->getName() << " duration: " << (endTime - startTime));
#endif
        }
    }

    const std::vector<AbstractProcessor*>& AbstractPipeline::getProcessors() const {
        return _processors;
    }

    bool AbstractPipeline::getEnabled() const {
        return _enabled;
    }

    void AbstractPipeline::setEnabled(bool enabled) {
        _enabled = enabled;
    }

    void AbstractPipeline::addProcessor(AbstractProcessor* processor) {
        tgtAssert(processor != 0, "Processor must not be 0.")
        _processors.push_back(processor);
    }

    void AbstractPipeline::lockAllProcessors() {
        for (std::vector<AbstractProcessor*>::iterator it = _processors.begin(); it != _processors.end(); ++it)
            (*it)->lockProcessor();
    }

    void AbstractPipeline::unlockAllProcessors() {
        for (std::vector<AbstractProcessor*>::iterator it = _processors.begin(); it != _processors.end(); ++it)
            (*it)->unlockProcessor();
    }


}