import { ref } from 'vue'
import { getApiErrorDetails } from '@/shared/api/http'

// 只等待工作清单同步守卫；版本冲突、权限失败和写请求均不重试。
export function useWorkSyncRead() {
  const syncing = ref(false)
  let generation = 0
  async function read<T>(load: () => Promise<T>, signal: AbortSignal): Promise<T> {
    const current = ++generation
    syncing.value = false
    try {
      for (let attempt = 0; ; attempt++) {
        signal.throwIfAborted()
        try { return await load() }
        catch (cause) {
          const error = getApiErrorDetails(cause)
          if (error.code !== 'A0409' || error.message !== '预约批次或运输关联已变化，服务端正在协调完整工作清单' || attempt >= 15) throw cause
          if (current === generation) syncing.value = true
          await new Promise<void>((resolve, reject) => {
            const abort = () => { clearTimeout(timer); reject(signal.reason) }
            const timer = setTimeout(() => { signal.removeEventListener('abort', abort); resolve() }, 2000)
            signal.addEventListener('abort', abort, { once: true })
            if (signal.aborted) { signal.removeEventListener('abort', abort); abort() }
          })
        }
      }
    } finally { if (current === generation) syncing.value = false }
  }
  return { syncing, read }
}