/**
 * orchestrator/test-gridsearch-ipc.mjs
 *
 * E2E test: spawn the C++ worker, send a gridsearch request
 * matching `npm run gridsearch:enrich` defaults, collect IPC events,
 * and verify the full event sequence.
 *
 * Run:   node orchestrator/test-gridsearch-ipc.mjs
 * Needs: npm run build-debug (or npm run build)
 */

import { spawnWorker } from './spawn.mjs';
import { resolve, dirname } from 'node:path';
import { readFileSync } from 'node:fs';
import { fileURLToPath } from 'node:url';
import fs from 'node:fs';

const __dirname = dirname(fileURLToPath(import.meta.url));
const IS_WIN = process.platform === 'win32';
const EXE_NAME = IS_WIN ? 'polymech-cli.exe' : 'polymech-cli';

const EXE = resolve(__dirname, '..', 'dist', EXE_NAME);
if (!fs.existsSync(EXE)) {
  console.error(`❌ No ${EXE_NAME} found in dist. Run npm run build first.`);
  process.exit(1);
}
console.log(`Binary: ${EXE}\n`);

// Load the sample settings (same as gridsearch:enrich)
const sampleConfig = JSON.parse(
  readFileSync(resolve(__dirname, '..', 'config', 'gridsearch-sample.json'), 'utf8')
);

let passed = 0;
let failed = 0;

function assert(condition, label) {
  if (condition) {
    console.log(`  ✅ ${label}`);
    passed++;
  } else {
    console.error(`  ❌ ${label}`);
    failed++;
  }
}

// ── Event collector ─────────────────────────────────────────────────────────

const EXPECTED_EVENTS = [
  'grid-ready',
  'waypoint-start',
  'area',
  'location',
  'enrich-start',
  'node',
  'nodePage',
  // 'node-error' — may or may not occur, depends on network
];

function createCollector() {
  const events = {};
  for (const t of ['grid-ready', 'waypoint-start', 'area', 'location',
    'enrich-start', 'node', 'node-error', 'nodePage']) {
    events[t] = [];
  }
  return {
    events,
    handler(msg) {
      const t = msg.type;
      if (events[t]) {
        events[t].push(msg);
      } else {
        events[t] = [msg];
      }
      // Live progress indicator
      const d = msg.payload ?? {};
      if (t === 'waypoint-start') {
        process.stdout.write(`\r  🔍 Searching waypoint ${(d.index ?? 0) + 1}/${d.total ?? '?'}...`);
      } else if (t === 'node') {
        process.stdout.write(`\r  📧 Enriched: ${d.title?.substring(0, 40) ?? ''}                      `);
      } else if (t === 'node-error') {
        process.stdout.write(`\r  ⚠️  Error: ${d.node?.title?.substring(0, 40) ?? ''}                    `);
      }
    },
  };
}

// ── Main test ───────────────────────────────────────────────────────────────

async function run() {
  console.log('🧪 Gridsearch IPC E2E Test\n');

  // ── 1. Spawn worker ───────────────────────────────────────────────────
  console.log('1. Spawn worker in daemon mode');
  const worker = spawnWorker(EXE, ['worker', '--daemon', '--user-uid', '3bb4cfbf-318b-44d3-a9d3-35680e738421']);
  const readyMsg = await worker.ready;
  assert(readyMsg.type === 'ready', 'Worker sends ready signal');

  // ── 2. Register event collector ───────────────────────────────────────
  const collector = createCollector();
  worker.onEvent(collector.handler);

  // ── 3. Send gridsearch request (matching gridsearch:enrich) ────────────
  console.log('2. Send gridsearch request (Aruba / recycling / --enrich)');
  const t0 = Date.now();

  // Very long timeout — enrichment can take minutes
  const result = await worker.request(
    {
      type: 'gridsearch',
      payload: {
        ...sampleConfig,
        enrich: true,
      },
    },
    5 * 60 * 1000 // 5 min timeout
  );

  const elapsed = ((Date.now() - t0) / 1000).toFixed(1);
  console.log(`\n\n  ⏱️  Completed in ${elapsed}s\n`);

  // ── 4. Verify final result ────────────────────────────────────────────
  console.log('3. Verify job_result');
  assert(result.type === 'job_result', `Response type is "job_result" (got "${result.type}")`);

  const summary = result.payload ?? null;
  assert(summary !== null, 'job_result payload is present');

  if (summary) {
    assert(typeof summary.totalMs === 'number', `totalMs is number (${summary.totalMs})`);
    assert(typeof summary.searchMs === 'number', `searchMs is number (${summary.searchMs})`);
    assert(typeof summary.enrichMs === 'number', `enrichMs is number (${summary.enrichMs})`);
    assert(typeof summary.freshApiCalls === 'number', `freshApiCalls is number (${summary.freshApiCalls})`);
    assert(typeof summary.waypointCount === 'number', `waypointCount is number (${summary.waypointCount})`);
    assert(summary.gridStats && typeof summary.gridStats.validCells === 'number', 'gridStats.validCells present');
    assert(summary.searchStats && typeof summary.searchStats.totalResults === 'number', 'searchStats.totalResults present');
    assert(typeof summary.enrichedOk === 'number', `enrichedOk is number (${summary.enrichedOk})`);
    assert(typeof summary.enrichedTotal === 'number', `enrichedTotal is number (${summary.enrichedTotal})`);
  }

  // ── 5. Verify event sequence ──────────────────────────────────────────
  console.log('4. Verify event stream');
  const e = collector.events;

  assert(e['grid-ready'].length === 1, `Exactly 1 grid-ready event (got ${e['grid-ready'].length})`);
  assert(e['waypoint-start'].length > 0, `At least 1 waypoint-start event (got ${e['waypoint-start'].length})`);
  assert(e['area'].length > 0, `At least 1 area event (got ${e['area'].length})`);
  assert(e['waypoint-start'].length === e['area'].length, `waypoint-start count (${e['waypoint-start'].length}) === area count (${e['area'].length})`);
  assert(e['enrich-start'].length === 1, `Exactly 1 enrich-start event (got ${e['enrich-start'].length})`);

  const totalNodes = e['node'].length + e['node-error'].length;
  assert(totalNodes > 0, `At least 1 node event (got ${totalNodes}: ${e['node'].length} ok, ${e['node-error'].length} errors)`);

  // Validate grid-ready payload
  if (e['grid-ready'].length > 0) {
    const gr = e['grid-ready'][0].payload ?? {};
    assert(Array.isArray(gr.areas), 'grid-ready.areas is array');
    assert(typeof gr.total === 'number' && gr.total > 0, `grid-ready.total > 0 (${gr.total})`);
  }

  // Validate location events have required fields
  if (e['location'].length > 0) {
    const loc = e['location'][0].payload ?? {};
    assert(loc.location && typeof loc.location.title === 'string', 'location event has location.title');
    assert(loc.location && typeof loc.location.place_id === 'string', 'location event has location.place_id');
    assert(typeof loc.areaName === 'string', 'location event has areaName');
  }
  assert(e['location'].length > 0, `At least 1 location event (got ${e['location'].length})`);

  // Validate node payloads
  if (e['node'].length > 0) {
    const nd = e['node'][0].payload ?? {};
    assert(typeof nd.placeId === 'string', 'node event has placeId');
    assert(typeof nd.title === 'string', 'node event has title');
    assert(Array.isArray(nd.emails), 'node event has emails array');
    assert(typeof nd.status === 'string', 'node event has status');
  }

  // ── 6. Print event summary ────────────────────────────────────────────
  console.log('\n5. Event summary');
  for (const [type, arr] of Object.entries(e)) {
    if (arr.length > 0) console.log(`     ${type}: ${arr.length}`);
  }

  // ── 7. Shutdown ───────────────────────────────────────────────────────
  console.log('\n6. Graceful shutdown');
  const shutdownRes = await worker.shutdown();
  assert(shutdownRes.type === 'shutdown_ack', 'Shutdown acknowledged');

  await new Promise(r => setTimeout(r, 500));
  assert(worker.process.exitCode === 0, `Worker exited with code 0 (got ${worker.process.exitCode})`);

  // ── Summary ───────────────────────────────────────────────────────────
  console.log(`\n────────────────────────────────`);
  console.log(`  Passed: ${passed}  Failed: ${failed}`);
  console.log(`────────────────────────────────\n`);

  process.exit(failed > 0 ? 1 : 0);
}

run().catch((err) => {
  console.error('Test runner error:', err);
  process.exit(1);
});