/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2016                                                               *
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 * without restriction, including without limitation the rights to use, copy, modify,    *
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 * permit persons to whom the Software is furnished to do so, subject to the following   *
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 * or substantial portions of the Software.                                              *
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 ****************************************************************************************/

#include <modules/base/rotation/spicerotation.h>

#include <openspace/util/spicemanager.h>
#include <openspace/util/time.h>

namespace {
    const std::string _loggerCat = "SpiceRotation";
    //const std::string keyGhosting = "EphmerisGhosting";

    const std::string KeySourceFrame = "SourceFrame";
    const std::string KeyDestinationFrame = "DestinationFrame";
    const std::string KeyKernels = "Kernels";
}

namespace openspace {
    
SpiceRotation::SpiceRotation(const ghoul::Dictionary& dictionary)
    : _sourceFrame("")
    , _destinationFrame("")
    , _rotationMatrix(1.0)
    , _kernelsLoadedSuccessfully(true)
{
    const bool hasSourceFrame = dictionary.getValue(KeySourceFrame, _sourceFrame);
    if (!hasSourceFrame)
        LERROR("SpiceRotation does not contain the key '" << KeySourceFrame << "'");

    const bool hasDestinationFrame = dictionary.getValue(KeyDestinationFrame, _destinationFrame);
    if (!hasDestinationFrame)
        LERROR("SpiceRotation does not contain the key '" << KeyDestinationFrame << "'");

    ghoul::Dictionary kernels;
    dictionary.getValue(KeyKernels, kernels);
    for (size_t i = 1; i <= kernels.size(); ++i) {
        std::string kernel;
        bool success = kernels.getValue(std::to_string(i), kernel);
        if (!success)
            LERROR("'" << KeyKernels << "' has to be an array-style table");

        try {
            SpiceManager::ref().loadKernel(kernel);
            _kernelsLoadedSuccessfully = true;
        }
        catch (const SpiceManager::SpiceException& e) {
            LERROR("Could not load SPICE kernel: " << e.what());
            _kernelsLoadedSuccessfully = false;
        }
    }
}
    
const glm::dmat3& SpiceRotation::matrix() const {
    return _rotationMatrix;
}

void SpiceRotation::update(const UpdateData& data) {
    if (!_kernelsLoadedSuccessfully)
        return;
    try {
        _rotationMatrix = SpiceManager::ref().positionTransformMatrix(
            _sourceFrame,
            _destinationFrame,
            data.time);
    }
    catch (const ghoul::RuntimeError&) {
        // In case of missing coverage
        _rotationMatrix = glm::dmat3(1);
    }
}

} // namespace openspace