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 * OpenSpace                                                                             *
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 * Copyright (c) 2014-2021                                                               *
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#include <modules/volume/rawvolumemetadata.h>

#include <openspace/documentation/verifier.h>
#include <openspace/documentation/documentation.h>
#include <openspace/util/time.h>
#include <ghoul/misc/dictionary.h>
#include <optional>

namespace {
    struct [[codegen::Dictionary(RawVolumeMetaData)]] Parameters {
        // Specifies the number of grid cells in each dimension
        glm::ivec3 dimensions;

        // Specifies the unit used to specity the domain
        std::optional<std::string> domainUnit;

        // Specifies the lower domain bounds in the model coordinate system
        std::optional<glm::vec3> lowerDomainBound;

        // Specifies the upper domain bounds in the model coordinate system
        std::optional<glm::vec3> upperDomainBound;

        // Specifies the time on the format YYYY-MM-DDTHH:MM:SS.000Z
        std::optional<std::string> time;

        // Specifies the unit used to specity the value
        std::optional<std::string> valueUnit;

        // Specifies the minimum value stored in the volume
        std::optional<float> minValue;

        // Specifies the maximum value stored in the volume
        std::optional<float> maxValue;
   };
#include "rawvolumemetadata_codegen.cpp"
} // namespace

namespace openspace::volume {

RawVolumeMetadata RawVolumeMetadata::createFromDictionary(
                                                      const ghoul::Dictionary& dictionary)
{
    const Parameters p = codegen::bake<Parameters>(dictionary);

    RawVolumeMetadata metadata;
    metadata.dimensions = p.dimensions;

    metadata.hasDomainBounds =
        p.lowerDomainBound.has_value() &&
        p.upperDomainBound.has_value();

    if (metadata.hasDomainBounds) {
        metadata.lowerDomainBound = *p.lowerDomainBound;
        metadata.upperDomainBound = *p.upperDomainBound;
    }
    metadata.hasDomainUnit = p.domainUnit.has_value();
    if (metadata.hasDomainUnit) {
        metadata.domainUnit = *p.domainUnit;
    }

    metadata.hasValueRange = p.minValue.has_value() && p.maxValue.has_value();
    if (metadata.hasValueRange) {
        metadata.minValue = *p.minValue;
        metadata.maxValue = *p.maxValue;
    }
    metadata.hasValueUnit = p.valueUnit.has_value();
    if (metadata.hasValueUnit) {
        metadata.valueUnit = *p.valueUnit;
    }

    metadata.hasTime = p.time.has_value();
    if (metadata.hasTime) {
        metadata.time = Time::convertTime(*p.time);
    }

    return metadata;
}

ghoul::Dictionary RawVolumeMetadata::dictionary() {
    constexpr const char* KeyDimensions = "Dimensions";
    constexpr const char* KeyLowerDomainBound = "LowerDomainBound";
    constexpr const char* KeyUpperDomainBound = "UpperDomainBound";
    constexpr const char* KeyMinValue = "MinValue";
    constexpr const char* KeyMaxValue = "MaxValue";
    constexpr const char* KeyTime = "Time";
    constexpr const char* KeyDomainUnit = "DomainUnit";
    constexpr const char* KeyValueUnit = "ValueUnit";
    constexpr const char* KeyGridType = "GridType";

    ghoul::Dictionary dict;
    dict.setValue(KeyDimensions, glm::dvec3(dimensions));
    dict.setValue(KeyGridType, gridTypeToString(gridType));

    if (hasDomainUnit) {
        dict.setValue(KeyDomainUnit, domainUnit);
    }
    if (hasDomainBounds) {
        dict.setValue(KeyLowerDomainBound, glm::dvec3(lowerDomainBound));
        dict.setValue(KeyUpperDomainBound, glm::dvec3(upperDomainBound));
    }

    if (hasValueRange) {
        dict.setValue(KeyMinValue, static_cast<double>(minValue));
        dict.setValue(KeyMaxValue, static_cast<double>(maxValue));
    }
    if (hasDomainUnit) {
        dict.setValue(KeyValueUnit, valueUnit);
    }

    if (hasTime) {
        std::string_view timeString = Time(time).ISO8601();
        // Do not include time offset in time string
        if (timeString.back() == 'Z') {
            timeString = timeString.substr(0, timeString.size() - 1);
        }
        dict.setValue(KeyTime, std::string(timeString));
    }
    return dict;
}

documentation::Documentation RawVolumeMetadata::Documentation() {
    return codegen::doc<Parameters>("volume_rawvolumemetadata");
}

} // namespace openspace::volume