#!/usr/bin/env node
// Capture un snapshot HA RÉEL depuis une exécution n8n récente du workflow EVCS
// → tests/golden/fixture-snapshot.json (base des scénarios golden).
// Usage: node tools/fetch-snapshot-fixture.mjs [executionId]

import fs from 'fs';
import os from 'os';
import path from 'path';

const WORKFLOW_ID = 'ATswvGfG4KJUls0K';
const SNAPSHOT_NODE = 'HA Snapshot EVCS Surplus Controller V2.2';
const OUT = 'tests/golden/fixture-snapshot.json';

function loadApiConfig() {
  const cfgPath = path.join(os.homedir(), '.config/opencode/opencode.json');
  const cfg = JSON.parse(fs.readFileSync(cfgPath, 'utf8'));
  const env = cfg?.mcp?.['n8n-mcp']?.environment || {};
  return {
    url: (env.N8N_API_URL || '').replace(/\/api\/v1\/?$/, ''),
    key: env.N8N_API_KEY
  };
}
const { url, key } = loadApiConfig();
const headers = { 'X-N8N-API-KEY': key };

let execId = process.argv[2];
if (!execId) {
  const res = await fetch(`${url}/api/v1/executions?workflowId=${WORKFLOW_ID}&status=success&limit=1`, { headers });
  const list = await res.json();
  execId = list.data?.[0]?.id;
  if (!execId) { console.error('Aucune exécution trouvée'); process.exit(1); }
}

const res = await fetch(`${url}/api/v1/executions/${execId}?includeData=true`, { headers });
if (!res.ok) { console.error(`GET exécution ${execId}: ${res.status}`); process.exit(1); }
const exec = await res.json();

const runData = exec.data?.resultData?.runData;
if (!runData?.[SNAPSHOT_NODE]) {
  console.error(`Node "${SNAPSHOT_NODE}" absent des données. Nodes dispo: ${Object.keys(runData || {}).join(', ')}`);
  process.exit(1);
}
const items = runData[SNAPSHOT_NODE][0]?.data?.main?.[0];
if (!items?.length) { console.error('Pas de données de sortie sur le node snapshot'); process.exit(1); }

const snapshot = items[0].json;
fs.mkdirSync(path.dirname(OUT), { recursive: true });
fs.writeFileSync(OUT, JSON.stringify(snapshot, null, 2) + '\n');
console.log(`Fixture écrite: ${OUT} (exécution ${execId}, ${Object.keys(snapshot).length} champs)`);
console.log(`Champs: ${Object.keys(snapshot).sort().join(', ')}`);