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/*! \internal \file
 * \brief
 * Implements classes in arraydata.h.
 *
 * \author Teemu Murtola <teemu.murtola@gmail.com>
 * \ingroup module_analysisdata
 */
#include "gmxpre.h"

#include "gromacs/analysisdata/arraydata.h"

#include <algorithm>

#include "gromacs/analysisdata/dataframe.h"
#include "gromacs/analysisdata/datamodulemanager.h"
#include "gromacs/utility/exceptions.h"
#include "gromacs/utility/gmxassert.h"

namespace gmx
{

AbstractAnalysisArrayData::AbstractAnalysisArrayData() :
    rowCount_(0), pointSetInfo_(0, 0, 0, 0), xstep_(1.0), bUniformX_(true), bReady_(false)
{
    xvalue_.push_back(0);
}

AbstractAnalysisArrayData::~AbstractAnalysisArrayData() {}


AnalysisDataFrameRef AbstractAnalysisArrayData::tryGetDataFrameInternal(int index) const
{
    if (!isAllocated())
    {
        return AnalysisDataFrameRef();
    }
    return AnalysisDataFrameRef(AnalysisDataFrameHeader(index, xvalue(index), 0.0),
                                makeConstArrayRef(value_).subArray(index * columnCount(), columnCount()),
                                constArrayRefFromArray(&pointSetInfo_, 1));
}


bool AbstractAnalysisArrayData::requestStorageInternal(int /*nframes*/)
{
    return true;
}


void AbstractAnalysisArrayData::setColumnCount(int ncols)
{
    GMX_RELEASE_ASSERT(!isAllocated(), "Cannot change column count after data has been allocated");
    AbstractAnalysisData::setColumnCount(0, ncols);
    pointSetInfo_ = AnalysisDataPointSetInfo(0, ncols, 0, 0);
}


void AbstractAnalysisArrayData::setRowCount(int rowCount)
{
    GMX_RELEASE_ASSERT(rowCount > 0, "Invalid number of rows");
    GMX_RELEASE_ASSERT(!isAllocated(), "Cannot change row count after data has been allocated");
    GMX_RELEASE_ASSERT(bUniformX_ || xvalue_.empty() || rowCount == ssize(xvalue_),
                       "X axis set with setXAxisValue() does not match the row count");
    xvalue_.resize(rowCount);
    if (bUniformX_ && rowCount > rowCount_)
    {
        for (int i = rowCount_; i < rowCount; ++i)
        {
            xvalue_[i] = xvalue_[0] + i * xstep_;
        }
    }
    rowCount_ = rowCount;
}


void AbstractAnalysisArrayData::allocateValues()
{
    GMX_RELEASE_ASSERT(!isAllocated(), "Can only allocate values once");
    GMX_RELEASE_ASSERT(rowCount() > 0 && columnCount() > 0,
                       "Row and column counts must be set before allocating values");
    value_.resize(rowCount() * columnCount());
    std::vector<AnalysisDataValue>::iterator i;
    for (i = value_.begin(); i != value_.end(); ++i)
    {
        i->setValue(0.0);
    }
}


void AbstractAnalysisArrayData::setXAxis(real start, real step)
{
    GMX_RELEASE_ASSERT(!bReady_, "X axis cannot be set after data is finished");
    xvalue_[0] = start;
    xstep_     = step;
    bUniformX_ = true;
    for (int i = 0; i < rowCount_; ++i)
    {
        xvalue_[i] = start + i * xstep_;
    }
}


void AbstractAnalysisArrayData::setXAxisValue(int row, real value)
{
    GMX_RELEASE_ASSERT(!bReady_, "X axis cannot be set after data is finished");
    if (rowCount_ > 0)
    {
        GMX_RELEASE_ASSERT(row >= 0 && row < rowCount(), "Row index out of range");
    }
    else if (row >= ssize(xvalue_))
    {
        xvalue_.resize(row + 1);
    }
    bUniformX_   = false;
    xstep_       = 0.0;
    xvalue_[row] = value;
}


void AbstractAnalysisArrayData::valuesReady()
{
    GMX_RELEASE_ASSERT(isAllocated(), "There must be some data");
    if (bReady_)
    {
        return;
    }
    bReady_ = true;

    AnalysisDataModuleManager& modules = moduleManager();
    modules.notifyDataStart(this);
    for (int i = 0; i < rowCount(); ++i)
    {
        AnalysisDataFrameHeader header(i, xvalue(i), 0);
        modules.notifyFrameStart(header);
        modules.notifyPointsAdd(AnalysisDataPointSetRef(
                header, pointSetInfo_, makeConstArrayRef(value_).subArray(i * columnCount(), columnCount())));
        modules.notifyFrameFinish(header);
    }
    modules.notifyDataFinish();
}


void AbstractAnalysisArrayData::copyContents(const AbstractAnalysisArrayData* src,
                                             AbstractAnalysisArrayData*       dest)
{
    GMX_RELEASE_ASSERT(src->isAllocated(), "Source data must not be empty");
    GMX_RELEASE_ASSERT(!dest->isAllocated(), "Destination data must not be allocated");
    dest->setColumnCount(src->columnCount());
    dest->setRowCount(src->rowCount());
    dest->allocateValues();
    dest->xstep_     = src->xstep_;
    dest->bUniformX_ = src->bUniformX_;
    std::copy(src->xvalue_.begin(), src->xvalue_.end(), dest->xvalue_.begin());
    std::copy(src->value_.begin(), src->value_.end(), dest->value_.begin());
}

} // namespace gmx
