// Group-scope read helpers for pump curves.
//
// Optimizers and totals evaluate each pump at the GROUP operating point
// (set by GroupOperatingPoint.equalize), not the pump's individual sensor-
// driven point. Each pump exposes a parallel "group*" predict object —
// these helpers fall back to the individual predicts when the pump hasn't
// been initialised for group operation yet (first tick after register).

function groupFlow(machine /*, ctx */)  {
    return machine.groupPredictFlow  ?? machine.predictFlow;
}

function groupPower(machine /*, ctx */) {
    return machine.groupPredictPower ?? machine.predictPower;
}

function groupNCog(machine /*, ctx */)  {
    return machine.groupPredictFlow ? (machine.groupNCog ?? 0) : (machine.NCog ?? 0);
}

function groupCalcPower(machine, flow /*, ctx */) {
    return typeof machine.groupCalcPower === 'function'
        ? machine.groupCalcPower(flow)
        : machine.inputFlowCalcPower(flow);
}

module.exports = { groupFlow, groupPower, groupNCog, groupCalcPower };