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 * OpenSpace                                                                             *
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 * Copyright (c) 2014-2025                                                               *
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#include <modules/base/timeframe/timeframeinterval.h>

#include <openspace/documentation/documentation.h>
#include <openspace/documentation/verifier.h>
#include <openspace/util/spicemanager.h>
#include <openspace/util/time.h>
#include <optional>

namespace {
    constexpr openspace::properties::Property::PropertyInfo HasStartInfo = {
        "HasStart",
        "Has start",
        "If enabled, this TimeFrame will be inactive before the Start.",
        openspace::properties::Property::Visibility::User
    };

    constexpr openspace::properties::Property::PropertyInfo StartInfo = {
        "Start",
        "Start",
        "Specifies the time when this TimeFrame becomes active.",
        openspace::properties::Property::Visibility::User
    };

    constexpr openspace::properties::Property::PropertyInfo HasEndInfo = {
        "HasEnd",
        "Has end",
        "If enabled, this TimeFrame will be inactive after the End.",
        openspace::properties::Property::Visibility::User
    };

    constexpr openspace::properties::Property::PropertyInfo EndInfo = {
        "End",
        "End",
        "Specifies the time when this TimeFrame becomes inactive.",
        openspace::properties::Property::Visibility::User
    };

    // This `TimeFrame`'s validity is determined by a single start and end time in between
    // which the scene graph node is valid. The start time is inclusive, while the end
    // time is exclusive. If the start time or end time is not specified, the value
    // corresponds to $-\infty$ and $\infty$ respectively. If both the start and end time
    // are not specified, the `TimeFrameInterval` will always be valid.
    struct [[codegen::Dictionary(TimeFrameInterval)]] Parameters {
        // [[codegen::verbatim(StartInfo.description)]]
        std::optional<std::variant<double, std::string>> start;

        // [[codegen::verbatim(EndInfo.description)]]
        std::optional<std::variant<double, std::string>> end;
    };
#include "timeframeinterval_codegen.cpp"
} // namespace

namespace openspace {

documentation::Documentation TimeFrameInterval::Documentation() {
    return codegen::doc<Parameters>("base_time_frame_interval");
}

TimeFrameInterval::TimeFrameInterval(const ghoul::Dictionary& dictionary)
    : _hasStart(HasStartInfo, false)
    , _start(StartInfo, 0, 0, 1E9)
    , _hasEnd(HasEndInfo, false)
    , _end(EndInfo, 0, 0, 1E9)
{
    const Parameters p = codegen::bake<Parameters>(dictionary);

    if (p.start.has_value()) {
        if (std::holds_alternative<double>(*p.start)) {
            _start = std::get<double>(*p.start);
        }
        else {
            _start = SpiceManager::ref().ephemerisTimeFromDate(
                std::get<std::string>(*p.start)
            );
        }
    }
    _hasStart = p.start.has_value();
    addProperty(_hasStart);
    addProperty(_start);

    if (p.end.has_value()) {
        if (std::holds_alternative<double>(*p.end)) {
            _end = std::get<double>(*p.end);
        }
        else {
            _end = SpiceManager::ref().ephemerisTimeFromDate(
                std::get<std::string>(*p.end)
            );
        }
    }
    _hasEnd = p.end.has_value();
    addProperty(_hasEnd);
    addProperty(_end);
}

void TimeFrameInterval::update(const Time& time) {
    if (_hasStart && time.j2000Seconds() < _start) {
        _isInTimeFrame = false;
    }
    else if (_hasEnd && time.j2000Seconds() >= _end) {
        _isInTimeFrame = false;
    }
    else {
        _isInTimeFrame = true;
    }
}

} // namespace openspace