#!/usr/bin/env node
/**
 * Local DeepSeek Harness (dsh) smoke — dev machine only, no LLM by default.
 *
 * Always verifies the CLI. When MEMIND_TOOL_GATEWAY_DSH_ENABLED=1, also prints
 * a dry-run launch plan (does not spawn dsh).
 *
 * Live headless smoke (costs LLM tokens) is opt-in only:
 *   MEMIND_DSH_RUN_LIVE_SMOKE=1 node scripts/check-dsh-executor-local.mjs
 * Any run expected to exceed 10k tokens requires explicit user approval.
 */
import { spawnSync } from 'node:child_process';
import { buildDshExecutorLaunchPlan, dshExecutorEnabled, resolveDshCommand } from '../dsh-agent-launch.mjs';

const cliName = process.env.MEMIND_DSH_BIN ?? process.env.DSH_BIN ?? 'dsh';
const pinnedVersion = process.env.MEMIND_DSH_PINNED_VERSION ?? '0.1.1-rc.2';

function run(cmd, args, options = {}) {
  return spawnSync(cmd, args, { encoding: 'utf8', ...options });
}

const versionResult = run(cliName, ['--version']);
const version = (versionResult.stdout ?? versionResult.stderr ?? '').trim();
if (versionResult.status !== 0 || !version) {
  console.error('DSH_EXECUTOR_FAIL: CLI not found');
  console.error(`  install: npm install -g @deepseek-ai/dsh@${pinnedVersion}`);
  process.exit(1);
}

const resolved = resolveDshCommand(process.env);
console.log('DSH_EXECUTOR_PROBE:');
console.log(`  version=${version}`);
console.log(`  command=${resolved.command}`);
console.log(`  via_npx=${resolved.viaNpx}`);

if (version !== pinnedVersion) {
  console.warn(`DSH_EXECUTOR_WARN: expected ${pinnedVersion}, got ${version}`);
}

const headlessHelp = run(resolved.command, resolved.viaNpx
  ? ['-y', '@deepseek-ai/dsh', '--profile', 'headless', '--help']
  : ['--profile', 'headless', '--help']);
if (headlessHelp.status !== 0) {
  console.error('DSH_EXECUTOR_FAIL: headless profile unavailable');
  process.exit(1);
}

if (!dshExecutorEnabled(process.env)) {
  console.log('DSH_EXECUTOR_SKIP: MEMIND_TOOL_GATEWAY_DSH_ENABLED is off (launch plan not checked)');
  console.log('DSH_EXECUTOR_CLI_OK');
  process.exit(0);
}

const plan = buildDshExecutorLaunchPlan({
  cwd: process.cwd(),
  instruction: process.env.MEMIND_DSH_SMOKE_TASK ?? 'List three files in the workspace root and stop.',
  env: process.env,
  runtimeEnv: {
    DEEPSEEK_API_KEY: process.env.DEEPSEEK_API_KEY ?? process.env.OPENAI_API_KEY ?? '',
  },
});

console.log('DSH_EXECUTOR_PLAN:');
console.log(JSON.stringify({
  ok: plan.ok,
  executor: plan.executor,
  command: plan.command,
  argsPreview: plan.args?.slice?.(0, 6),
  cwd: plan.cwd,
  message: plan.message ?? null,
}, null, 2));

if (!plan.ok) {
  console.error('DSH_EXECUTOR_FAIL: launch plan unavailable');
  process.exit(1);
}

if (process.env.MEMIND_DSH_RUN_LIVE_SMOKE !== '1') {
  console.log('DSH_EXECUTOR_OK: dry-run plan ready (no LLM; set MEMIND_DSH_RUN_LIVE_SMOKE=1 to execute once)');
  process.exit(0);
}

if (!process.env.DEEPSEEK_API_KEY && !process.env.OPENAI_API_KEY) {
  console.error('DSH_EXECUTOR_FAIL: live smoke requires DEEPSEEK_API_KEY or OPENAI_API_KEY');
  process.exit(1);
}

console.warn('DSH_EXECUTOR_LIVE: spawning one headless task (LLM tokens will be consumed)');
const live = spawnSync(plan.command, plan.args, {
  cwd: plan.cwd,
  env: { ...process.env, ...plan.env },
  encoding: 'utf8',
  maxBuffer: 1024 * 1024,
  timeout: positiveTimeout(process.env.MEMIND_DSH_LIVE_TIMEOUT_MS, 120_000),
});

if (live.error) {
  console.error(`DSH_EXECUTOR_FAIL: ${live.error.message}`);
  process.exit(1);
}
if (live.status !== 0) {
  console.error(`DSH_EXECUTOR_FAIL: exit ${live.status}`);
  if (live.stderr) console.error(live.stderr.slice(0, 2000));
  process.exit(1);
}

const preview = (live.stdout ?? '').trim().slice(0, 500);
console.log(`DSH_EXECUTOR_LIVE_OK: stdout_preview=${JSON.stringify(preview)}`);

function positiveTimeout(value, fallback) {
  const n = Number(value);
  if (!Number.isFinite(n) || n <= 0) return fallback;
  return Math.floor(n);
}