#!/usr/bin/env node
/** Snapshot-only Loader driver: stream one fixture turn as canonical JSONL. */

import type { Context } from '@deepseek-ai/cordis'
import { boot, installFailLoud, loadEnv, resolveConfigPath } from '@deepseek-ai/dsh-app-boot'
import { runFixtureTurn } from '@deepseek-ai/dsh-loader-smoke'
import type { SessionEvent } from '@deepseek-ai/dsh-session'

const NAME = 'headless-test-driver'
const [configPath, ...taskParts] = process.argv.slice(2)
if (configPath === undefined || taskParts.length === 0 || taskParts.every(part => part.trim() === '')) {
  throw new Error(`${NAME}: expected <config-path> <task...>`)
}

const uninstallFailLoud = installFailLoud(NAME)
let ctx: Context | undefined
try {
  loadEnv(NAME)
  ctx = await boot(NAME, resolveConfigPath(configPath, undefined))
  const result = await runFixtureTurn(ctx, {
    task: taskParts.join(' '),
    onEvent: (sessionId: string, event: SessionEvent) => {
      process.stdout.write(`${JSON.stringify({ type: 'session_event', sessionId, event })}\n`)
    },
  })
  process.stdout.write(`${JSON.stringify(result)}\n`)
} catch (error: unknown) {
  process.stderr.write(`${error instanceof Error ? error.message : String(error)}\n`)
  process.exitCode = 1
} finally {
  await ctx?.fiber.dispose()
  uninstallFailLoud()
}