const MODULE = 'phase4-carrier-nodes'
const OPTIONS = { scenario: 'phase4-carrier-nodes-lifecycle', deploymentBlocker: true }
const BASE = '/api/platform/v1/carrier-schedule-queries'

export const QUERY_STATUSES = Object.freeze(['READY', 'MANUAL_REQUIRED', 'ARRIVED', 'PICKUP_READY', 'STOPPED'])
export const STANDARD_NODES = Object.freeze([
  'DEPARTED_WAREHOUSE', 'AT_ORIGIN_PORT', 'DEPARTED_ORIGIN_PORT',
  'IN_TRANSIT', 'ARRIVED', 'PICKUP_READY',
])

function id(value) { return value == null ? '' : String(value) }
function number(value) { return Number.isFinite(Number(value)) }
function nullableText(value) { return value == null || typeof value === 'string' }
function nullableId(value) { return value == null || Boolean(id(value)) }
function nullableIso(value) { return value == null || (typeof value === 'string' && !Number.isNaN(Date.parse(value))) }

function validTask(task) {
  return Boolean(id(task?.id) && task?.queryNo && id(task?.customerId) && id(task?.oceanBookingId))
    && QUERY_STATUSES.includes(task?.status)
    && nullableId(task?.containerBookingId)
    && nullableText(task?.latestStandardNode)
    && (task?.latestStandardNode == null || STANDARD_NODES.includes(task.latestStandardNode))
    && ['latestNodeObservedAt', 'lastSuccessAt', 'sourceUpdatedAt', 'expiresAt', 'stoppedAt']
      .every((field) => nullableIso(task?.[field]))
    && nullableText(task?.stopReason)
}

function validNode(node) {
  return Boolean(id(node?.id) && node?.providerCode && node?.providerNodeCode)
    && STANDARD_NODES.includes(node?.standardNode)
    && number(node?.nodeSequence) && Number(node.nodeSequence) > 0
    && nullableIso(node?.observedAt) && node?.observedAt != null
    && nullableIso(node?.estimatedAt) && nullableIso(node?.actualAt)
    && nullableText(node?.locationCode) && nullableText(node?.locationName)
    && nullableText(node?.sourceReference) && nullableIso(node?.createdAt)
}

function validHistory(item) {
  return Boolean(id(item?.id) && item?.action)
    && (item?.fromVersion == null || number(item.fromVersion))
    && (item?.toVersion == null || number(item.toVersion))
    && nullableText(item?.reason) && nullableId(item?.operatorId)
    && nullableText(item?.operatorName) && nullableIso(item?.createdAt)
}

export async function run(context) {
  const carriersResponse = await context.request('GET', `${BASE}/carriers`)
  const carriers = context.apiSuccess(MODULE, '查询船司只读辅助信息', carriersResponse, '', OPTIONS)
  context.assert(MODULE, '船司辅助信息保持公开只读描述结构', carriersResponse,
    Array.isArray(carriers) && carriers.every((item) => item?.carrierCode && item?.carrierName
      && nullableText(item?.officialUrl) && nullableText(item?.accessMode)
      && typeof item?.automated === 'boolean' && typeof item?.coverageGap === 'boolean'),
    `count=${Array.isArray(carriers) ? carriers.length : 'missing'}`, OPTIONS)

  const pageResponse = await context.request('GET', `${BASE}?page=1&size=20`)
  const page = context.apiSuccess(MODULE, '查询四期船节点任务分页', pageResponse, '', OPTIONS)
  const records = Array.isArray(page?.records) ? page.records : []
  context.assert(MODULE, '船节点分页结构稳定', pageResponse,
    Array.isArray(page?.records) && ['page', 'size', 'total', 'pages'].every((field) => number(page?.[field]))
      && records.every((item) => typeof item?.expired === 'boolean' && validTask(item?.query)),
    `records=${records.length}, total=${page?.total ?? 'missing'}`, OPTIONS)

  if (records.length === 0) {
    context.assert(MODULE, '无真实任务时返回稳定分页空态', pageResponse,
      Number(page?.total) === 0 && Number(page?.pages) === 0,
      `records=0, total=${page?.total ?? 'missing'}, pages=${page?.pages ?? 'missing'}`, OPTIONS)
    return
  }

  const queryId = id(records[0]?.query?.id)
  const detailResponse = await context.request('GET', `${BASE}/${encodeURIComponent(queryId)}`)
  const detail = context.apiSuccess(MODULE, '查询真实船节点任务详情', detailResponse, `queryId=${queryId}`, OPTIONS)
  const nodes = Array.isArray(detail?.nodes) ? detail.nodes : []
  const histories = Array.isArray(detail?.histories) ? detail.histories : []
  context.assert(MODULE, '详情返回Task、标准节点与业务历史', detailResponse,
    validTask(detail?.query?.query) && typeof detail?.query?.expired === 'boolean'
      && Array.isArray(detail?.nodes) && nodes.every(validNode)
      && Array.isArray(detail?.histories) && histories.every(validHistory),
    `status=${detail?.query?.query?.status || 'missing'}, nodes=${nodes.length}, histories=${histories.length}`, OPTIONS)

  const historyResponse = await context.request('GET', `${BASE}/${encodeURIComponent(queryId)}/history`)
  const history = context.apiSuccess(MODULE, '查询真实船节点任务历史', historyResponse, `queryId=${queryId}`, OPTIONS)
  context.assert(MODULE, '独立历史端点返回可审计操作者与nullable字段', historyResponse,
    Array.isArray(history) && history.every(validHistory),
    `history=${Array.isArray(history) ? history.length : 'missing'}`, OPTIONS)
}