#!/usr/bin/env node
// R3 — Suite de tests GOLDEN du workflow EVCS Surplus Controller V2.6.
// Exécute le VRAI code des nodes (chaîne complète INPUT_PARSE → WINDOWS_SOURCEV2
// → BATTERY_CLOUD_LOCKS → DECISION_ENGINEV2 → HA_SERVICE_CALLS_OUTPUT → Build)
// sur un snapshot HA réel modifié par scénario, avec horloge simulée.
//
// Usage:
//   node tests/golden/run.mjs            # assertions (exit 1 si échec)
//   node tests/golden/run.mjs --print    # affiche les résumés (pour figer les attendus)
//   node tests/golden/run.mjs --only=night-hc   # filtre par label
//
// RÈGLE : cette suite DOIT passer avant tout push (intégrée à tools/n8n-push.mjs).

import fs from 'fs';
import vm from 'vm';
import path from 'path';
import { fileURLToPath } from 'url';
import { scenarios } from './scenarios.mjs';

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const ROOT = path.resolve(__dirname, '../..');
const WORKFLOW_FILE = path.join(ROOT, 'workflows/evcs-surplus-controller-v2.6.json');
const FIXTURE_FILE = path.join(__dirname, 'fixture-snapshot.json');

const PRINT = process.argv.includes('--print');
const JSON_OUT = process.argv.includes('--json');
const only = (process.argv.find(a => a.startsWith('--only=')) || '').slice(7);

const wf = JSON.parse(fs.readFileSync(WORKFLOW_FILE, 'utf8'));
const fixture = JSON.parse(fs.readFileSync(FIXTURE_FILE, 'utf8'));

const CHAIN = [
  'INPUT_PARSE',
  'WINDOWS_SOURCEV2',
  'BATTERY_CLOUD_LOCKS',
  'DECISION_ENGINEV2',
  'HA_SERVICE_CALLS_OUTPUT',
];
const nodeCode = Object.fromEntries(
  CHAIN.map(n => [n, wf.nodes.find(x => x.name === n).parameters.jsCode])
);

// Horloge simulée : Date épinglée à l'instant du scénario dans la sandbox.
function makeFakeDate(fixedMs) {
  return class FakeDate extends Date {
    constructor(...args) {
      if (args.length === 0) super(fixedMs);
      else super(...args);
    }
    static now() { return fixedMs; }
  };
}

function runNode(jsCode, inputJson, fixedMs) {
  const ctx = {
    $input: { first: () => ({ json: inputJson }) },
    console, Intl, Math, Number, Object, String, JSON, Array, Boolean,
    Date: makeFakeDate(fixedMs),
  };
  vm.createContext(ctx);
  const out = vm.runInContext(`(function(){\n${jsCode}\n})()`, ctx);
  return out[0].json;
}

// Overrides par défaut : timers neutres relatifs à l'instant du scénario
// (min_stop écoulé, pas de blocage anti-cliquetis, filtre no-demand au repos).
function stamp(ms) {
  const p = new Intl.DateTimeFormat('fr-FR', {
    timeZone: 'Europe/Paris', year: 'numeric', month: '2-digit', day: '2-digit',
    hour: '2-digit', minute: '2-digit', second: '2-digit', hour12: false,
  }).formatToParts(new Date(ms));
  const g = t => p.find(x => x.type === t).value;
  return `${g('year')}-${g('month')}-${g('day')} ${g('hour')}:${g('minute')}:${g('second')}`;
}

function baseOverrides(fixedMs) {
  return {
    last_start_at: stamp(fixedMs - 2 * 3600000),
    last_stop_at: stamp(fixedMs - 2 * 3600000 + 30000),
    last_current_change_at: stamp(fixedMs - 2 * 3600000),
    blocked_until: stamp(fixedMs - 3600000),
    last_block_reason: 'none',
    evcs_no_demand_filter_eval_at: stamp(fixedMs - 30000),
    evcs_no_demand_semantic_active: 'off',
    evcs_delivery_ratio_ema: '0.9',
    evcs_delivery_noise_ema: '0.01',
    evcs_no_demand_score_ema: '0.0',
    probe_started_at: '',
    cloud_debt_kwh: '0.0',
    night_takeover_prev: 'off',
    prev_surplus_state: 'idle_wait_conditions',
    grid_state: 'off',
    victron_acin1_available: '0',
    evcs_charging_switch: 'off',
    control_latch: 'off',
    charge_permission_now: 'off',
    controller_enabled: 'on',
    vebus_overload: 'off',
    vebus_l1_overload: 'off',
    vebus_low_battery: 'off',
    vebus_l1_low_battery: 'off',
  };
}

function summarize(out) {
  const c = out.computed || {};
  const d = out.decision || {};
  const calls = out.ha_service_calls || {};
  return {
    profile: c.profile,
    sourceMode: c.source_mode,
    state: d.state,
    decision: d.current_decision,
    desiredCharging: d.desired_charging,
    currentA: d.desired_current_a,
    takeoverNeeded: !!c.night_grid_takeover_needed,
    edfOnAction: !!calls.edf_general_ok_on?.execute,
    takeoverHelperService: calls.helper_night_grid_takeover_needed?.service || null,
    // Session reseau unique (03/09/2026) : null = aucune ecriture ce cycle.
    sessionCommittedService: calls.helper_night_grid_session_committed?.execute
      ? calls.helper_night_grid_session_committed.service
      : null,
    // Consigne de puissance reseau ecrite ce cycle (null = aucune ecriture).
    gridSetpointW: calls.grid_power_setpoint?.execute
      ? calls.grid_power_setpoint.data.value
      : null,
  };
}

const jsonResults = {};
let failures = 0, ran = 0;
for (const sc of scenarios) {
  if (only && !sc.id.includes(only)) continue;
  ran++;
  const fixedMs = new Date(sc.time).getTime();
  if (!Number.isFinite(fixedMs)) throw new Error(`${sc.id}: time invalide`);

  const raw = { ...fixture, ...baseOverrides(fixedMs), ...sc.overrides };
  let payload = { data: JSON.stringify(raw) };
  try {
    for (const nodeName of CHAIN) payload = runNode(nodeCode[nodeName], payload, fixedMs);
  } catch (e) {
    failures++;
    console.log(`💥 ${sc.id} : CRASH dans la chaîne — ${e.message}`);
    continue;
  }
  const got = summarize(payload);

  if (JSON_OUT) {
    jsonResults[sc.id] = got;
    continue;
  }

  if (PRINT) {
    console.log(`\n─── ${sc.id} | ${sc.label}`);
    console.log('   expect:', JSON.stringify(got));
    if (payload.decision?.short_reason) console.log('   raison:', payload.decision.short_reason);
    continue;
  }

  const diffs = [];
  for (const [k, v] of Object.entries(sc.expect || {})) {
    if (JSON.stringify(got[k]) !== JSON.stringify(v)) diffs.push(`${k}: attendu ${JSON.stringify(v)}, obtenu ${JSON.stringify(got[k])}`);
  }
  if (diffs.length) {
    failures++;
    console.log(`❌ ${sc.id} | ${sc.label}`);
    for (const d of diffs) console.log(`   ${d}`);
    if (payload.decision?.short_reason) console.log(`   raison: ${payload.decision.short_reason}`);
  } else {
    console.log(`✅ ${sc.id}`);
  }
}

if (JSON_OUT) {
  console.log(JSON.stringify(jsonResults, null, 2));
  process.exit(0);
}

if (!PRINT) {
  console.log(failures
    ? `\n${failures}/${ran} ÉCHEC(S) — NE PAS POUSSER EN PRODUCTION`
    : `\nGOLDEN OK — ${ran}/${ran} scénarios conformes`);
  process.exit(failures ? 1 : 0);
}