// Wiring helpers for cross-node end-to-end tests.
//
// Builds a small physical plant in pure JS:
//   - 3 rotatingMachine pumps (centrifugal, identical curves)
//   - 1 machineGroupControl coordinating them
//   - 1 pumpingStation owning a wet-well basin and the MGC
//
// Pumps register as children of the MGC. The MGC registers as a child of
// the PS. This mirrors what Node-RED's registerChild messages do at runtime.
//
// A controllable clock replaces Date.now so _updatePredictedVolume's deltaT
// is exact regardless of wall-clock time.

const PumpingStation = require('../../nodes/pumpingStation/src/specificClass');
const MachineGroup   = require('../../nodes/machineGroupControl/src/specificClass');
const Machine        = require('../../nodes/rotatingMachine/src/specificClass');

// ---------------- configs (mirror what the demo flow ships) ----------------

function pumpConfig(id) {
  return {
    general: { id, name: id, unit: 'm3/h',
               logging: { enabled: false, logLevel: 'error' } },
    functionality: { softwareType: 'machine', role: 'rotationaldevicecontroller',
                     positionVsParent: 'atEquipment' },
    asset: { category: 'pump', type: 'centrifugal',
             model: 'hidrostal-H05K-S03R', supplier: 'hidrostal',
             curveUnits: { pressure: 'mbar', flow: 'm3/h', power: 'kW', control: '%' } },
    mode: {
      current: 'auto',
      allowedActions: { auto: ['execsequence', 'execmovement', 'flowmovement', 'statuscheck'] },
      allowedSources: { auto: ['parent', 'GUI'] },
    },
    sequences: {
      startup: ['starting', 'warmingup', 'operational'],
      shutdown: ['stopping', 'coolingdown', 'idle'],
      emergencystop: ['emergencystop', 'off'],
    },
  };
}

function pumpStateConfig() {
  return {
    general: { logging: { enabled: false, logLevel: 'error' } },
    state: { current: 'idle' },
    movement: { mode: 'staticspeed', speed: 1200, maxSpeed: 1800, interval: 10 },
    time: { starting: 0, warmingup: 0, stopping: 0, coolingdown: 0 },
  };
}

function mgcConfig() {
  return {
    general: { name: 'mgc', id: 'mgc', logging: { enabled: false, logLevel: 'error' } },
    functionality: { softwareType: 'machinegroup', role: 'groupcontroller',
                     positionVsParent: 'atEquipment' },
    scaling: { current: 'normalized' },
    mode: { current: 'optimalcontrol' },
  };
}

function psConfig(overrides = {}) {
  return {
    general: { id: 'ps', name: 'ps', unit: 'm3/h',
               logging: { enabled: false, logLevel: 'error' },
               flowThreshold: 1e-4 },
    functionality: { softwareType: 'pumpingstation', role: 'stationcontroller',
                     positionVsParent: 'atEquipment' },
    basin: {
      // Sized so the [stopLevel,startLevel] band holds enough water that
      // a single pump at min flow (~99 m³/h) drains for ~5 min while
      // nominal inflow (~25 m³/h) refills it in ~15 min.
      // 0.5 m × 12.5 m² = 6.25 m³  (drain time = 6.25 / (99-25) m³/h ≈ 5 min)
      volume: 50, height: 4,
      inflowLevel: 2.5, outflowLevel: 0.3, overflowLevel: 3.8,
      inletPipeDiameter: 0.4, outletPipeDiameter: 0.3,
    },
    hydraulics: { refHeight: 'NAP', basinBottomRef: 0, minHeightBasedOn: 'outlet' },
    control: {
      mode: 'levelbased',
      allowedModes: new Set(['levelbased', 'manual']),
      levelbased: {
        minLevel: 0.5, startLevel: 2.5, stopLevel: 2.0, maxLevel: 3.5,
        curveType: 'linear', logCurveFactor: 9,
        deadZoneKeepAlivePercent: 1,  // % sent to MGC while engaged in [stopLvl, startLevel]
        enableShiftedRamp: false, shiftLevel: null, shiftArmPercent: 95,
      },
    },
    safety: {
      enableDryRunProtection: true, enableOverfillProtection: true,
      dryRunThresholdPercent: 5, highVolumeSafetyThresholdPercent: 95,
      overfillThresholdPercent: 95, timeleftToFullOrEmptyThresholdSeconds: 0,
    },
    ...overrides,
  };
}

// ---------------- harness ----------------

function buildPlant({ initialBasinLevel = 2.0 } = {}) {
  const ps = new PumpingStation(psConfig());
  const mgc = new MachineGroup(mgcConfig());
  const pumps = ['pump_a', 'pump_b', 'pump_c'].map(id => new Machine(pumpConfig(id), pumpStateConfig()));

  // Inject initial pressure on each pump so predictFlow / predictPower /
  // predictCtrl have a real fDimension before MGC starts asking. Real
  // values are set every tick by the physics step.
  for (const m of pumps) injectPumpPressure(m, /* upstreamPa */ 19620, /* downstreamPa */ 117720);

  // Wire pumps → MGC.
  for (const m of pumps) mgc.childRegistrationUtils.registerChild(m, m.config.functionality.positionVsParent);
  // Wire MGC → PS.
  ps.childRegistrationUtils.registerChild(mgc, mgc.config.functionality.positionVsParent);

  mgc.calcAbsoluteTotals();
  mgc.calcDynamicTotals();

  // Calibrate basin level to start point.
  ps.calibratePredictedLevel(initialBasinLevel);

  // Controllable clock — overrides Date.now ONLY for our process.
  let now = Date.now();
  const realNow = Date.now;
  Date.now = () => now;
  ps._predictedFlowState.lastTimestamp = now;

  function advance(ms) { now += ms; }
  function restore() { Date.now = realNow; }

  return { ps, mgc, pumps, advance, restore, get now() { return now; } };
}

// Convert mbar to Pa for the rotatingMachine canonical pressure unit.
function mbarToPa(mbar) { return mbar * 100; }
function paToMbar(Pa)   { return Pa / 100; }

// Inject upstream + downstream pressure measurements onto a pump as if a
// pressure-sensor child had emitted them. updateMeasuredPressure is the
// same path the rotatingMachine listens on for sensor children, so this
// fires the pump's "pressure.measured.<position>" emitter — which the MGC
// is also subscribed to, so totals recompute identically.
function injectPumpPressure(pump, upstreamPa, downstreamPa, ts = Date.now()) {
  pump.updateMeasuredPressure(paToMbar(upstreamPa),   'upstream',
    { timestamp: ts, unit: 'mbar', childName: 'PT-up', childId: `up-${pump.config.general.id}` });
  pump.updateMeasuredPressure(paToMbar(downstreamPa), 'downstream',
    { timestamp: ts, unit: 'mbar', childName: 'PT-dn', childId: `dn-${pump.config.general.id}` });
}

module.exports = {
  buildPlant,
  injectPumpPressure,
  mbarToPa, paToMbar,
};