'use strict';

// Handlers for monster input topics. Each is a pure function over the
// domain (source). Unit conversion for incoming flow happens in the
// handler (the legacy nodeClass did it inline) — anything else inbound
// is passed straight through to source.handleInput.

exports.cmdStart = (source, msg) => {
  source.handleInput('i_start', Boolean(msg.payload));
};

exports.setSchedule = (source, msg) => {
  source.handleInput('monsternametijden', msg.payload);
};

exports.setRain = (source, msg) => {
  source.handleInput('rain_data', msg.payload);
};

exports.dataFlow = (source, msg, ctx) => {
  // The registry has already normalised any accepted shape (number, numeric
  // string, or { value, unit }) to a number in m3/h and tagged msg.unit.
  const log = ctx?.logger || source.logger;
  const value = Number(msg.payload);
  if (!Number.isFinite(value)) {
    log?.warn?.(`data.flow payload must be numeric, got '${JSON.stringify(msg.payload)}'.`);
    return;
  }
  source.handleInput('input_q', { value, unit: msg.unit || 'm3/h' });
};

exports.setMode = (source, msg) => {
  if (typeof source.setMode === 'function') source.setMode(msg.payload);
};

exports.setModelPrediction = (source, msg) => {
  if (typeof source.setModelPrediction === 'function') source.setModelPrediction(msg.payload);
};

// Inbound child registration from a measurement (or other) child node.
// Ported from the legacy `case 'registerChild'` branch in nodeClass.
exports.childRegister = (source, msg, ctx) => {
  const childId = msg.payload;
  const childObj = ctx?.RED?.nodes?.getNode?.(childId);
  if (!childObj?.source) {
    (ctx?.logger || source.logger)?.warn?.(`child.register skipped: missing child/source for id=${childId}`);
    return;
  }
  source.childRegistrationUtils.registerChild(childObj.source, msg.positionVsParent, msg.distance);
};