// Copyright (2019-2024) Paul Scherrer Institute

#include "HDF5DataFilePluginXFEL.h"

void HDF5DataFilePluginXFEL::SetupSWMRFile(HDF5File &data_file, const DataMessage &msg) {
    if (msg.xfel_pulse_id.has_value() && msg.xfel_event_code.has_value())
        enable = true;
    else
        return;

    HDF5Group(data_file, "/entry/xfel").NXClass("NXcollection");

    HDF5DataSpace data_space_linear({2}, {H5S_UNLIMITED});
    HDF5Dcpl dcpl_linear;
    dcpl_linear.SetChunking({1});
    HDF5DataSet(data_file, "/entry/xfel/pulseID", HDF5DataType(8, false), data_space_linear, dcpl_linear).SetExtent({1});
    HDF5DataSet(data_file, "/entry/xfel/eventCode", HDF5DataType(4, false), data_space_linear, dcpl_linear).SetExtent({1});
}

void HDF5DataFilePluginXFEL::OpenFile(HDF5File &data_file, const DataMessage &msg) {
    if (!enable)
        return;

    data_set_xfel_event_code = std::make_unique<HDF5DataSet>(data_file, "/entry/xfel/eventCode");
    data_set_xfel_pulseid = std::make_unique<HDF5DataSet>(data_file, "/entry/xfel/pulseID");
}

void HDF5DataFilePluginXFEL::Write(const DataMessage &msg) {
    if (!enable
        || !msg.xfel_pulse_id.has_value()
        || !msg.xfel_event_code.has_value())
        return;

    size_t image_number = msg.number;

    if (image_number >= max_image_number) {
        max_image_number = image_number;
        data_set_xfel_pulseid->SetExtent({max_image_number + 1});
        data_set_xfel_event_code->SetExtent({max_image_number + 1});
    }

    data_set_xfel_event_code->WriteScalar(msg.xfel_event_code.value(), {image_number});
    data_set_xfel_pulseid->WriteScalar(msg.xfel_pulse_id.value(), {image_number});
}

void HDF5DataFilePluginXFEL::Flush() {
    if (!enable)
        return;
    
    data_set_xfel_event_code->Flush();
    data_set_xfel_pulseid->Flush();
}