// Diagnostic only: exercises the real installed extension with the sibling repo's
// isolated harness. No real processes, live endpoints, or messaging are invoked.
import assert from 'node:assert/strict';
import { readFile } from 'node:fs/promises';
import { pathToFileURL } from 'node:url';

const installed = 'C:/Users/decid/AppData/Local/spt-core/adapters/_github/BigscreenVR-omp-spt/strings/omp-spt.mjs';
const harnessPath = 'C:/Users/decid/Documents/projects/omp-spt/tests/omp-extension.mjs';
const source = await readFile(harnessPath, 'utf8');
const end = source.indexOf('\nfunction commandCalls(');
assert.ok(end > 0, 'harness definition boundary exists');
const definitions = source.slice(0, end)
  .replaceAll('../adapter/strings/omp-spt.mjs', pathToFileURL(installed).href)
  + '\nexport { createHarness, assistantMessage, flush };';
const { createHarness, assistantMessage, flush } = await import(
  'data:text/javascript;base64,' + Buffer.from(definitions).toString('base64')
);
const old = assistantMessage([{ type: 'text', text: 'OLD_SENTINEL' }], {
  timestamp: 10, responseId: 'historical',
});
const current = assistantMessage([{ type: 'text', text: 'NEW_SENTINEL' }], {
  timestamp: 20, responseId: 'current',
});
async function probe(firstContext) {
  const rig = createHarness();
  await rig.emit('session_start');
  await rig.emit('context', { messages: [old] });
  await rig.emit('before_agent_start', { prompt: 'continue' });
  await rig.emit('agent_start');
  await rig.emit('context', { messages: firstContext });
  await rig.emit('context', { messages: [old, current] });
  await flush();
  const mids = rig.calls.filter(call => call.args.includes('--mid')).map(call => call.input);
  await rig.emit('session_shutdown');
  return mids;
}
const stableHistory = await probe([old]);
const narrowedThenExpanded = await probe([]);
assert.deepEqual(stableHistory, ['NEW_SENTINEL']);
assert.deepEqual(narrowedThenExpanded, ['OLD_SENTINEL', 'NEW_SENTINEL']);
console.log(JSON.stringify({ stableHistory, narrowedThenExpanded }, null, 2));
console.log('PROVEN: a narrower first context forgets historical output; later expansion re-reports it.');
console.log('NOT PROVEN: this snapshot sequence occurred during the live checkpoint replay.');