/**
 * pi SDK 会话管理冒烟测试（v0.2.0）
 * 验证：runtime 创建、list、newSession、switchSession（历史恢复）、rename、删除（回收站）。
 */
import { createAgentSessionRuntime, createAgentSessionServices, createAgentSessionFromServices, getAgentDir, SessionManager } from '@earendil-works/pi-coding-agent'
import { homedir } from 'node:os'
import { join } from 'node:path'

const cwd = homedir()
const agentDir = getAgentDir()

console.log('[smoke2] listing sessions (cwd=%s)...', cwd)
const before = await SessionManager.list(cwd)
console.log('[smoke2] found %d sessions', before.length)

const initialServices = await createAgentSessionServices({ cwd, agentDir })
const factory = async ({ cwd: nextCwd, agentDir: nextAgentDir, sessionManager, sessionStartEvent }) => {
  const services =
    nextCwd === initialServices.cwd && nextAgentDir === initialServices.agentDir
      ? initialServices
      : await createAgentSessionServices({ cwd: nextCwd, agentDir: nextAgentDir })
  const result = await createAgentSessionFromServices({ services, sessionManager, sessionStartEvent })
  return { ...result, services, diagnostics: services.diagnostics }
}

const sessionManager = SessionManager.create(cwd)
const runtime = await createAgentSessionRuntime(factory, { cwd, agentDir, sessionManager })
let rebindCount = 0
runtime.setRebindSession(async () => {
  rebindCount += 1
})
console.log('[smoke2] runtime ready, session=%s', runtime.session.sessionId)

// 重命名
runtime.session.setSessionName('smoke-测试会话')
console.log('[smoke2] renamed to: %s', runtime.session.sessionName)

// 会话里追加用户+助手消息（直接写会话文件，不触发 LLM）
// pi 约定：只有出现 assistant 消息后才会真正落盘（避免空会话残留文件）
runtime.session.sessionManager.appendMessage({ role: 'user', content: '这是一条冒烟测试消息', timestamp: Date.now() })
runtime.session.sessionManager.appendMessage({
  role: 'assistant',
  content: [{ type: 'text', text: '冒烟回复（不经过 LLM）' }],
  api: 'openai-completions',
  provider: 'smoke',
  model: 'smoke-model',
  usage: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0, cost: 0 },
  stopReason: 'stop',
  timestamp: Date.now()
})
console.log('[smoke2] messages in session:', runtime.session.messages.length)

const listAfter = await SessionManager.list(cwd)
const mine = listAfter.find((s) => s.name === 'smoke-测试会话' || s.firstMessage.includes('冒烟测试'))
console.log('[smoke2] session visible in list: %s (total %d)', Boolean(mine), listAfter.length)
if (mine) {
  console.log('[smoke2] meta: name=%s firstMessage=%s count=%d', mine.name, JSON.stringify(mine.firstMessage.slice(0, 30)), mine.messageCount)

  // 新会话（切换）
  await runtime.newSession()
  console.log('[smoke2] newSession ok, rebind=%d, new id=%s, messages=%d', rebindCount, runtime.session.sessionId, runtime.session.messages.length)

  // 切回
  await runtime.switchSession(mine.path)
  console.log(
    '[smoke2] switch back ok, rebind=%d, id=%s, messages restored=%d, name=%s',
    rebindCount,
    runtime.session.sessionId,
    runtime.session.messages.length,
    runtime.session.sessionName ?? '(none)'
  )
}

await runtime.dispose()
console.log('[smoke2] done')
process.exit(0)