#!/usr/bin/env node
import fs from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';
import { createAgentRunGateway } from '../agent-run-gateway.mjs';
import { createDbPool } from '../db.mjs';
import { createTkmindProxy } from '../tkmind-proxy.mjs';
import { createUserAuth } from '../user-auth.mjs';

const root = path.join(path.dirname(fileURLToPath(import.meta.url)), '..');

function loadEnvFile(filePath) {
  if (!fs.existsSync(filePath)) return;
  for (const line of fs.readFileSync(filePath, 'utf8').split('\n')) {
    const trimmed = line.trim();
    if (!trimmed || trimmed.startsWith('#')) continue;
    const eq = trimmed.indexOf('=');
    if (eq < 0) continue;
    const key = trimmed.slice(0, eq).trim();
    const value = trimmed.slice(eq + 1).trim();
    if (!process.env[key]) process.env[key] = value;
  }
}

function parseTargets() {
  const csv = String(process.env.TKMIND_API_TARGETS ?? '').trim();
  if (csv) {
    return csv.split(',').map((item) => item.trim()).filter(Boolean);
  }
  return [process.env.TKMIND_API_TARGET ?? 'https://127.0.0.1:18006'];
}

function parseArgs(argv) {
  const args = {
    once: false,
    status: false,
    pollMs: Number(process.env.MEMIND_AGENT_RUN_WORKER_POLL_MS ?? 1000),
    limit: Number(process.env.MEMIND_AGENT_RUN_WORKER_BATCH_SIZE ?? 1),
  };
  for (let i = 0; i < argv.length; i += 1) {
    const item = argv[i];
    if (item === '--once') args.once = true;
    else if (item === '--status') args.status = true;
    else if (item === '--poll-ms') args.pollMs = Number(argv[++i] ?? args.pollMs);
    else if (item === '--limit') args.limit = Number(argv[++i] ?? args.limit);
    else if (item === '--help' || item === '-h') args.help = true;
  }
  return args;
}

function printHelp() {
  console.log([
    'Usage:',
    '  node scripts/agent-run-worker.mjs [--once] [--status] [--poll-ms 1000] [--limit 1]',
    '',
    'Notes:',
    '  - Processes existing h5_agent_runs queued/retryable rows through the Tool Gateway queue.',
    '  - Does not create agent runs by itself.',
    '  - Set MEMIND_AGENT_RUN_AUTODISPATCH=0 on Portal only when this worker is ready to take over.',
  ].join('\n'));
}

loadEnvFile(process.env.MEMIND_ENV_FILE || path.join(root, '.env'));
loadEnvFile(path.join(root, '.env.local'));

const args = parseArgs(process.argv.slice(2));
if (args.help) {
  printHelp();
  process.exit(0);
}

const pool = createDbPool();
const userAuth = createUserAuth(pool, {
  usersRoot: process.env.H5_USERS_ROOT ?? path.join(root, 'users'),
  h5Root: root,
});
const apiTargets = parseTargets();
const tkmindProxy = createTkmindProxy({
  apiTarget: apiTargets[0],
  apiTargets,
  apiSecret: process.env.TKMIND_SERVER__SECRET_KEY ?? 'local-dev-secret',
  userAuth,
});
const gateway = createAgentRunGateway({
  pool,
  userAuth,
  tkmindProxy,
  autoDispatch: false,
  maxConcurrentRuns: Number(process.env.MEMIND_AGENT_RUN_QUEUE_CONCURRENCY ?? 1),
  runTimeoutMs: Number(process.env.MEMIND_AGENT_RUN_TIMEOUT_MS ?? 15 * 60 * 1000),
});

let stopping = false;
process.on('SIGINT', () => { stopping = true; });
process.on('SIGTERM', () => { stopping = true; });

async function runOnce() {
  const result = await gateway.dispatchQueuedRuns({ limit: args.limit });
  console.log(JSON.stringify({
    ok: true,
    mode: args.status ? 'status' : 'dispatch',
    dispatched: args.status ? 0 : result.dispatched,
    queue: result.queue,
  }));
}

try {
  if (args.status) {
    console.log(JSON.stringify({ ok: true, queue: await gateway.getQueueStatus() }, null, 2));
  } else if (args.once) {
    await runOnce();
  } else {
    console.log(JSON.stringify({ ok: true, worker: 'agent-run-worker', pollMs: args.pollMs, limit: args.limit }));
    while (!stopping) {
      await runOnce();
      await new Promise((resolve) => setTimeout(resolve, Math.max(200, args.pollMs)));
    }
  }
} finally {
  await pool.end().catch(() => {});
}