'use strict';

// Phase 10 rewrite: drives only the public BaseNodeAdapter surface.
// The pre-refactor _tick / _startTickLoop methods are gone — periodic
// emission lives in `_emitOutputs()` (overridden in the reactor nodeClass
// to preserve the Fluent / GridProfile Port-0 contract; delta-compressed
// payloads can't carry the C-vector). The override is part of the
// documented BaseNodeAdapter override surface, so we exercise it
// directly. The fully-constructed adapter wires `inst.source.engine`,
// `inst._output`, etc. so we don't have to assemble stub bags.

const test = require('node:test');
const assert = require('node:assert/strict');

const nodeClass = require('../../src/nodeClass');
const { makeUiConfig } = require('../helpers/factories');

function makeRED() { return { nodes: { getNode: () => null } }; }

function makeNode(id = 'reactor-node-1') {
  const sends = [];
  const statuses = [];
  const handlers = {};
  return {
    id, sends, statuses, handlers,
    send(arr)  { sends.push(arr); },
    status(b)  { statuses.push(b); },
    on(ev, fn) { handlers[ev] = fn; },
    warn() {}, error() {},
  };
}

function closeNode(node) {
  if (node.handlers.close) node.handlers.close(() => {});
}

function pickEffluentSends(node) {
  return node.sends.filter((s) => Array.isArray(s) && s[0] && s[0].topic === 'Fluent');
}

function pickGridSends(node) {
  return node.sends.filter((s) => Array.isArray(s) && s[0] && s[0].topic === 'GridProfile');
}

test('_emitOutputs sends the effluent message on process output (CSTR)', () => {
  const node = makeNode();
  const inst = new nodeClass(
    makeUiConfig({ reactor_type: 'CSTR' }),
    makeRED(),
    node,
    'reactor',
  );

  try {
    // Reset sends so any construction-time emissions don't pollute the
    // assertion (the registration triple lands on the same buffer).
    node.sends.length = 0;
    inst._emitOutputs();

    const fluentSends = pickEffluentSends(node);
    assert.equal(fluentSends.length, 1, 'exactly one Fluent message');
    const triple = fluentSends[0];
    assert.equal(triple[0].topic, 'Fluent');
    assert.ok(triple[0].payload && Array.isArray(triple[0].payload.C));
    // CSTR has no grid profile.
    assert.equal(pickGridSends(node).length, 0);
  } finally {
    closeNode(node);
  }
});

test('_emitOutputs emits a GridProfile message when engine exposes one (PFR)', () => {
  const node = makeNode();
  const inst = new nodeClass(
    makeUiConfig({ reactor_type: 'PFR' }),
    makeRED(),
    node,
    'reactor',
  );

  try {
    node.sends.length = 0;
    inst._emitOutputs();

    assert.equal(pickGridSends(node).length, 1, 'exactly one GridProfile message');
    assert.equal(pickEffluentSends(node).length, 1, 'exactly one Fluent message');
  } finally {
    closeNode(node);
  }
});

test('_emitOutputs formats per-species influx telemetry via outputUtils', () => {
  const node = makeNode();
  const inst = new nodeClass(
    makeUiConfig({ reactor_type: 'CSTR' }),
    makeRED(),
    node,
    'reactor',
  );

  try {
    // Stub updateState so the engine integration does not overwrite the
    // engineered state we want the telemetry formatter to see.
    inst.source.updateState = () => {};
    inst.source.engine.setInfluent = {
      payload: { inlet: 0, F: 42, C: [2.1, 30, 100, 16, 0, 1, 8, 25, 75, 1500, 0, 15, 2500] },
    };
    inst.source.engine.state = [2.1, 30, 100, 16, 0, 1, 8, 25, 75, 1500, 0, 15, 2500];
    inst.source.engine.temperature = 19.5;

    let captured = null;
    const realFormat = inst._output.formatMsg.bind(inst._output);
    inst._output.formatMsg = (output, cfg, format) => {
      if (format === 'influxdb') captured = { output, format };
      return realFormat(output, cfg, format);
    };

    node.sends.length = 0;
    inst._emitOutputs();

    assert.ok(captured, 'formatMsg was called with influxdb format');
    assert.equal(captured.format, 'influxdb');
    assert.equal(captured.output.flow_total, 42);
    assert.equal(captured.output.temperature, 19.5);
    assert.equal(captured.output.S_O, 2.1);
    assert.equal(captured.output.S_NH, 16);
    assert.equal(captured.output.X_TS, 2500);
  } finally {
    closeNode(node);
  }
});

test('Reactor.tick(dt) drives the kinetics engine and advances state', () => {
  const node = makeNode();
  const inst = new nodeClass(
    makeUiConfig({ reactor_type: 'CSTR' }),
    makeRED(),
    node,
    'reactor',
  );

  try {
    // Feed an influent so the integrator has something to chew on.
    inst.source.engine.setInfluent = {
      payload: { inlet: 0, F: 5, C: [0,30,100,16,0,0,5,25,75,30,0,0.001,125] },
    };

    const stateBefore = JSON.stringify(inst.source.engine.state);
    inst.source.tick(0.001);
    const stateAfter = JSON.stringify(inst.source.engine.state);

    assert.notEqual(stateBefore, stateAfter, 'engine state should advance after tick(dt)');
  } finally {
    closeNode(node);
  }
});