// 验证渲染层对 session_switched 历史消息的渲染逻辑：
// 用与主进程一致的 session.messages 源，跑 MessageItem 的 readBlocks + AssistantBody 判断。
import os from 'node:os'
import { createAgentSessionServices, getAgentDir } from '@earendil-works/pi-coding-agent'

const cwd = os.homedir()
const services = await createAgentSessionServices({ cwd, agentDir: getAgentDir() })

// SessionManager.list + 加载最近会话的等价做法：直接用 services 里加载当前会话
const session = services.sessionManager
  ? null
  : null

// 走 SessionManager 拿最近会话并加载
const { SessionManager } = await import('@earendil-works/pi-coding-agent')
const sm = SessionManager.continueRecent(cwd)
const smAny = sm
// SessionManager.continueRecent 返回的 manager 需要挂到 session 上才有 messages；
// 更直接：读它指向的会话文件并解析 message 条目
const entries = []
if (typeof smAny.loadEntries === 'function') {
  entries.push(...(await smAny.loadEntries()))
}
console.log('loadEntries available:', typeof smAny.loadEntries === 'function', 'entries:', entries.length)

// 退路：直接解析磁盘上的最近 jsonl（与主进程 toCloneable 后的消息同构）
import { readdirSync, readFileSync, statSync } from 'node:fs'
import { join } from 'node:path'
const dir = join(cwd, '.pi', 'agent', 'sessions', '--C--Users-21976--')
const files = readdirSync(dir).filter((f) => f.endsWith('.jsonl'))
files.sort((a, b) => statSync(join(dir, b)).mtimeMs - statSync(join(dir, a)).mtimeMs)
const latest = files[0]
console.log('latest session file:', latest)

const lines = readFileSync(join(dir, latest), 'utf8').trim().split('\n')
const messages = []
for (const line of lines) {
  let entry
  try {
    entry = JSON.parse(line)
  } catch {
    continue
  }
  if (entry.type === 'message' && entry.message) messages.push(entry.message)
}

// ==== 渲染层逻辑复刻（与 MessageItem.tsx 一致）====
function readBlocks(raw) {
  if (!raw || typeof raw !== 'object') return []
  const content = raw.content
  if (typeof content === 'string') return [{ type: 'text', text: content }]
  if (Array.isArray(content)) {
    return content.filter((c) => typeof c === 'object' && c !== null)
  }
  return []
}

for (const [i, m] of messages.entries()) {
  console.log(`\n=== history msg #${i} role=${m.role} ===`)
  const blocks = readBlocks(m)
  let rendered = 0
  for (const block of blocks) {
    if (block.type === 'thinking' && typeof block.text === 'string') {
      console.log('  -> ThinkingBlock (text field)')
      rendered++
      continue
    }
    if (block.type === 'text' && block.text) {
      console.log(`  -> Markdown("${String(block.text).slice(0, 60)}…")`)
      rendered++
      continue
    }
    if (block.type === 'toolCall' && block.id) {
      console.log('  -> ToolCard', block.name)
      rendered++
      continue
    }
    console.log('  -> **被丢弃** block type =', block.type, 'keys =', Object.keys(block).join(','))
  }
  console.log(`  rendered ${rendered}/${blocks.length} blocks`)
}