const MODULE = 'finance-reconciliation-full'
const SCENARIO = 'finance-full-reconciliation'
const BASE = '/api/platform/finance/v1'
const OPTIONS = { scenario: SCENARIO, deploymentBlocker: true }
const STATEMENT_LIST_PERMISSION = 'platform:finance:customer-statement:list'
const LEGACY_STATEMENT_VIEW_PERMISSION = 'platform:finance:bill:view'
const REQUIRED_PERMISSIONS = [
  'platform:finance:customer-account:list',
  STATEMENT_LIST_PERMISSION,
  'platform:finance:reconciliation:create',
  'platform:finance:reconciliation:review',
  'platform:finance:reconciliation:issue',
  'platform:finance:reconciliation:adjust',
  'platform:finance:reconciliation:void',
  'platform:finance:settlement-ar:create',
  'platform:finance:settlement-ar:list',
  'platform:finance:settlement-ap:create',
  'platform:finance:settlement-ap:list',
]

function id(value) { return value == null ? '' : String(value) }
function list(value) { return Array.isArray(value) ? value : [] }
function rows(value) { return Array.isArray(value) ? value : list(value?.records) }
function statementId(value) { return id(value?.statementId ?? value?.id ?? value?.billId) }
function settlementId(value) { return id(value?.settlementId ?? value?.id) }
function sourceId(value) { return id(value?.feeSourceId ?? value?.financeFeeSourceId ?? value?.id) }
function sourceDate(value) { return value?.businessDate ?? value?.billingDate ?? value?.feeDate ?? '' }
function sourceWaybill(value) { return id(value?.waybillId ?? value?.shipmentId ?? value?.orderNo ?? value?.sourceNo) }
function financePoolId(value) {
  const poolItemId = id(value?.poolItemId)
  if (poolItemId) return poolItemId.includes(':') ? poolItemId.slice(poolItemId.indexOf(':') + 1) : poolItemId
  return id(value?.feeSourceId ?? value?.financeFeeSourceId ?? value?.id)
}
function isUnboundContainerCost(raw) {
  return raw?.sourceType === 'MANUAL' && raw?.billingBasis === 'CONTAINER_SHARED'
    && !sourceWaybill(raw)
}
function lineSourceIds(value) { return list(value?.lines).map(sourceId).filter(Boolean) }
function rejectedWith(response, code) {
  return response?.http === 200 && String(response?.body?.code) === code
}
function accessDenied(response) { return rejectedWith(response, 'A0403') }
function financeSubjectMissing(response) {
  return rejectedWith(response, 'FIN_409')
    && String(response?.body?.message ?? '').includes('平台财务主体未配置')
}
function sameIds(actual, expected) {
  const left = [...new Set(actual)].sort()
  const right = [...new Set(expected)].sort()
  return left.length === right.length && left.every((value, index) => value === right[index])
}

function present(value) { return value !== undefined && value !== null && String(value).trim() !== '' }

async function verifyIssuedStatementReadback(context, fixture, statement, label) {
  const customerId = id(fixture.customerId)
  const targetId = statementId(statement)
  if (!customerId || !targetId) {
    context.addCoverageGap(MODULE, SCENARIO, `${label} 对账单列表/详情查回`,
      `必须使用本轮 fixture.customerId 和刚创建且已出账的 statementId；customerId=${customerId || 'missing'}, statementId=${targetId || 'missing'}`,
      'missing-issued-statement-readback-fixture', { marker: context.marker, customerId, statementId: targetId })
    return
  }
  const listResponse = await context.request('GET',
    `${BASE}/statements?customerId=${encodeURIComponent(customerId)}`)
  const summaries = context.apiSuccess(MODULE, `${label} 从正式对账单列表查回`, listResponse,
    `customerId=${customerId}, statementId=${targetId}, permission=${STATEMENT_LIST_PERMISSION}`, OPTIONS)
  const statementRows = rows(summaries)
  const found = statementRows.find((item) => statementId(item) === targetId)
  context.assert(MODULE, `${label} 正式对账单列表仅返回本轮客户且包含同一 statementId`, listResponse,
    statementRows.length > 0 && statementRows.every((item) => id(item?.customerId) === customerId) && Boolean(found),
    `customerId=${customerId}, statementId=${targetId}, rows=${statementRows.length}, found=${statementId(found) || 'missing'}`, OPTIONS)

  const detailResponse = await context.request('GET',
    `${BASE}/reconciliation-statements/${encodeURIComponent(targetId)}`)
  const detail = context.apiSuccess(MODULE, `${label} 从正式对账单详情查回`, detailResponse,
    `customerId=${customerId}, statementId=${targetId}, permission=${STATEMENT_LIST_PERMISSION}`, OPTIONS)
  const auditShape = ['createdBy', 'createdAt', 'updatedBy', 'updatedAt']
    .every((field) => Object.hasOwn(detail ?? {}, field) && present(detail?.[field]))
  context.assert(MODULE, `${label} 对账单详情归属、明细、revision 与审计结构完整`, detailResponse,
    id(detail?.customerId) === customerId && statementId(detail) === targetId
      && Array.isArray(detail?.lines) && detail.lines.length > 0
      && Array.isArray(detail?.revisions) && detail.revisions.length > 0
      && auditShape,
    `customerId=${id(detail?.customerId) || 'missing'}, statementId=${statementId(detail) || 'missing'}, lines=${list(detail?.lines).length}, revisions=${list(detail?.revisions).length}, auditShape=${auditShape}`, OPTIONS)
}

async function findSettlementInOfficialList(context, direction, customerId, targetId, label) {
  const segment = direction === 'RECEIVABLE' ? 'receivable-settlements' : 'payable-settlements'
  const response = await context.request('GET',
    `${BASE}/${segment}?customerId=${encodeURIComponent(customerId)}`)
  const summaries = context.apiSuccess(MODULE, `从正式${label}列表查回结算单`, response,
    `settlementId=${targetId}, customerId=${customerId}`, OPTIONS)
  const found = rows(summaries).find((item) => settlementId(item) === targetId)
  context.assert(MODULE, `正式${label}列表包含同一 settlementId`, response,
    found?.direction === direction && id(found?.customerId) === id(customerId),
    `expected=${targetId}, actual=${settlementId(found) || 'missing'}, direction=${found?.direction ?? 'missing'}`, OPTIONS)
  return found ?? null
}
function dates(sources) {
  const values = sources.map((source) => source.businessDate).sort()
  return { start: values[0], end: values.at(-1) }
}
function key(context, action) {
  return `${context.marker}-finance-reconciliation-${action}`.replace(/[^A-Za-z0-9_.:-]/g, '-').slice(0, 128)
}
function write(context, method, path, body, action) {
  return context.request(method, path, body, context.token, { 'Idempotency-Key': key(context, action) })
}
function finish(context, start) {
  const steps = context.steps.slice(start)
  context.scenarios.push({
    name: SCENARIO, module: MODULE, success: steps.every((step) => step.passed),
    deploymentBlocked: steps.some((step) => step.deploymentBlocker),
    passed: steps.filter((step) => step.passed).length,
    failed: steps.filter((step) => !step.passed).length,
  })
}
function diagnostic(response) {
  return { http: response?.http ?? null,
    code: response?.body?.code == null ? null : String(response.body.code),
    requestId: response?.requestId ?? null, traceId: response?.traceId ?? null }
}
function accountRows(value) {
  const data = value?.body?.data
  return rows(data).concat(rows(data?.items))
}
function accountCustomerId(value) { return id(value?.customerId ?? value?.tenantId ?? value?.accountId ?? value?.id) }
function hasWalletField(value) {
  return value && typeof value === 'object' && ['balance', 'recharge', 'prepayment'].some((field) => Object.hasOwn(value, field))
}
function accountInformationComplete(value) {
  return ['customerCode', 'customerName', 'contactName', 'contactPhone', 'status', 'lastChangedAt']
    .every((field) => present(value?.[field]))
    && ['outstandingReceivable', 'pendingBilling', 'receivedInPeriod', 'outstandingPayable']
      .every((field) => Number.isFinite(Number(value?.[field])))
}
function ledgerInformationComplete(value) {
  return ['ledgerId', 'occurredAt', 'businessType', 'documentType', 'documentId', 'documentNo', 'operatorName']
    .every((field) => present(value?.[field]))
    && ['receivableChange', 'payableChange', 'outstandingReceivableAfter']
      .every((field) => Number.isFinite(Number(value?.[field])))
}
async function verifyCustomerAccountAndLedger(context, fixture) {
  const customerId = id(fixture.customerId)
  const accountResponse = await context.request('GET',
    `${BASE}/accounts?page=1&pageSize=20&customerId=${encodeURIComponent(customerId)}`)
  const accounts = accountRows(accountResponse)
  const account = accounts.find((item) => accountCustomerId(item) === customerId)
  context.assert(MODULE, '客户账户列表包含本轮 marker 客户且不暴露钱包字段', accountResponse,
    Boolean(account) && !accounts.some(hasWalletField),
    `customerId=${customerId}, accountCount=${accounts.length}, requestId=${accountResponse.requestId ?? 'null'}, traceId=${accountResponse.traceId ?? 'null'}`, OPTIONS)
  context.assert(MODULE, '客户账户基本信息、四项金额和最近变动时间完整', accountResponse,
    accountInformationComplete(account),
    `customerId=${customerId}, customerCode=${account?.customerCode ?? 'missing'}, contact=${account?.contactName ?? 'missing'}/${account?.contactPhone ?? 'missing'}, lastChangedAt=${account?.lastChangedAt ?? 'missing'}`, OPTIONS)
  const ledgerResponse = await context.request('GET', `${BASE}/accounts/${encodeURIComponent(customerId)}/ledger?page=1&pageSize=200`)
  const ledger = accountRows(ledgerResponse)
  const rowsForCustomer = ledger.filter((item) => {
    const itemCustomer = accountCustomerId(item)
    return !itemCustomer || itemCustomer === customerId
  })
  const expectedIds = new Set([
    ...(fixture.statements || []).map((item) => statementId(item)),
    ...(fixture.receivableSettlements || []).map((item) => settlementId(item)),
    ...(fixture.payableSettlements || []).map((item) => settlementId(item)),
  ].filter(Boolean))
  const containsRoundTrip = rowsForCustomer.some((item) => expectedIds.has(statementId(item) || settlementId(item)
    || id(item?.documentId ?? item?.businessId ?? item?.sourceId ?? item?.referenceId))
    || String(item?.remark ?? '').includes(context.marker))
  context.assert(MODULE, '客户账户流水仅属于本轮客户并包含账单/收款或结算流水', ledgerResponse,
    rowsForCustomer.length === ledger.length && containsRoundTrip,
    `customerId=${customerId}, ledgerCount=${ledger.length}, requestId=${ledgerResponse.requestId ?? 'null'}, traceId=${ledgerResponse.traceId ?? 'null'}`, OPTIONS)
  const incompleteLedger = rowsForCustomer.filter((item) => !ledgerInformationComplete(item))
  context.assert(MODULE, '客户账户流水时间、业务类型、关联单据、金额和操作人完整', ledgerResponse,
    rowsForCustomer.length > 0 && incompleteLedger.length === 0,
    `customerId=${customerId}, ledgerCount=${rowsForCustomer.length}, incomplete=${incompleteLedger.length}`, OPTIONS)
  fixture.root.accountReadback = { account: account || null, accountDiagnostic: diagnostic(accountResponse),
    ledgerCount: ledger.length, ledgerDiagnostic: diagnostic(ledgerResponse) }
}
function blocker(context, name, evidence, category, response = null) {
  context.addStep(MODULE, name, response, false, evidence, OPTIONS)
  context.addCoverageGap(MODULE, SCENARIO, name, evidence, category,
    { marker: context.marker, ...diagnostic(response) })
}

async function normalizeFixture(context) {
  const root = context.createdResources?.financeFullFixtures
  if (!root || root.marker !== context.marker || !root.customerId
    || !Array.isArray(root.orders) || !Array.isArray(root.feeSources)) return null
  const customerId = id(root.customerId)
  const expectedSourceIds = new Set(root.feeSources.map(sourceId).filter(Boolean))
  let pool = []
  for (let attempt = 0; attempt < 20; attempt += 1) {
    const poolResponse = await context.request('GET',
      `${BASE}/fee-pool?customerId=${encodeURIComponent(customerId)}&direction=ALL`)
    const poolData = poolResponse?.body?.data
    pool = rows(poolData).concat(rows(poolData?.items))
    const visible = new Set(pool.map((item) => id(item?.sourceId)))
    if ([...expectedSourceIds].every((source) => visible.has(source))) break
    await new Promise((resolve) => setTimeout(resolve, 500))
  }
  const poolBySource = new Map(pool.map((item) => [id(item?.sourceId), item]))
  const attemptedSources = root.feeSources.map((raw) => {
    const financeSource = poolBySource.get(sourceId(raw))
    return {
      raw, feeSourceId: financePoolId(financeSource), sourceFeeId: sourceId(raw), customerId: id(raw.customerId),
      direction: String(raw.direction ?? ''), currency: String(raw.currency ?? raw.currencyCode ?? '').toUpperCase(),
      businessDate: sourceDate(raw), waybillId: sourceWaybill(raw), marker: raw.marker,
      supplierId: id(raw.supplierId ?? root.supplierId),
      supplierName: raw.supplierName ?? root.supplierName ?? null,
    }
  })
  const hasContainerAllocations = list(root.allocations).length > 0
  const uncreatedSources = attemptedSources.filter((source) => !source.feeSourceId
    || (isUnboundContainerCost(source.raw) && !hasContainerAllocations))
  return {
    root, customerId,
    sources: attemptedSources.filter((source) => source.feeSourceId
      && (!isUnboundContainerCost(source.raw) || hasContainerAllocations)),
    uncreatedSources,
    sourceMappings: attemptedSources.filter((source) => source.feeSourceId
      && (!isUnboundContainerCost(source.raw) || hasContainerAllocations))
      .map((source) => ({ sourceFeeId: source.sourceFeeId, feeSourceId: source.feeSourceId,
        sourceType: source.raw?.sourceType ?? null, direction: source.direction })),
  }
}

async function createStatement(context, sources, action, name, generationMode = 'SELECTED') {
  const period = dates(sources)
  const body = {
    customerId: sources[0].customerId, currency: 'CNY', generationMode,
    feeSourceIds: generationMode === 'SELECTED' ? sources.map((source) => source.feeSourceId) : [],
    periodStart: period.start, periodEnd: period.end, remark: `${context.marker}-${action}`,
  }
  const response = await write(context, 'POST', `${BASE}/statements`, body, action)
  const statement = context.apiSuccess(MODULE, name, response,
    `mode=${generationMode}, sources=${sources.length}`, OPTIONS)
  if (!statement) return { body, response, statement: null }
  const replayResponse = await write(context, 'POST', `${BASE}/statements`, body, action)
  const replay = context.apiSuccess(MODULE, `${name}幂等重放`, replayResponse, '', OPTIONS)
  context.assert(MODULE, `${name}幂等保持同一资源和版本`, replayResponse,
    statementId(replay) === statementId(statement) && Number(replay?.version) === Number(statement.version),
    `first=${statementId(statement)}, replay=${statementId(replay)}, version=${replay?.version ?? 'missing'}`, OPTIONS)
  return { body, response, statement }
}

async function act(context, statement, action, suffix, reason, adjustmentLines) {
  if (!statement) return null
  const body = { action, expectedVersion: Number(statement.version) }
  if (reason) body.reason = reason
  if (adjustmentLines) body.adjustmentLines = adjustmentLines
  const response = await write(context, 'POST',
    `${BASE}/reconciliation-statements/${statementId(statement)}/actions`, body, suffix)
  const next = context.apiSuccess(MODULE, `对账单执行 ${action}`, response,
    `statementId=${statementId(statement)}, version=${statement.version}`, OPTIONS)
  const expected = { SUBMIT: 'PENDING_REVIEW', APPROVE: 'APPROVED', REJECT: 'REJECTED',
    ISSUE: 'ISSUED', ADJUST: 'ISSUED', VOID: 'VOIDED', REOPEN: 'DRAFT' }[action]
  context.assert(MODULE, `${action} 状态与版本符合服务端状态机`, response,
    next?.status === expected && Number(next?.version) === Number(statement.version) + 1,
    `expected=${expected}, actual=${next?.status ?? 'missing'}, version=${next?.version ?? 'missing'}`, OPTIONS)
  return next
}

async function issueSimple(context, statement, suffix) {
  statement = await act(context, statement, 'SUBMIT', `${suffix}-submit`)
  statement = await act(context, statement, 'APPROVE', `${suffix}-approve`)
  return act(context, statement, 'ISSUE', `${suffix}-issue`)
}

async function issueCompleteChain(context, statement) {
  statement = await act(context, statement, 'SUBMIT', 'chain-submit-1')
  if (!statement) return null
  const replayBody = { action: 'SUBMIT', expectedVersion: Number(statement.version) - 1 }
  const replayResponse = await write(context, 'POST',
    `${BASE}/reconciliation-statements/${statementId(statement)}/actions`, replayBody, 'chain-submit-1')
  const replay = context.apiSuccess(MODULE, '状态动作幂等重放原结果', replayResponse, '', OPTIONS)
  context.assert(MODULE, '动作幂等重放不重复递增版本', replayResponse,
    statementId(replay) === statementId(statement) && Number(replay?.version) === Number(statement.version),
    `version=${replay?.version ?? 'missing'}`, OPTIONS)
  statement = await act(context, statement, 'REJECT', 'chain-reject', `${context.marker}-reject`)
  statement = await act(context, statement, 'REOPEN', 'chain-reopen-rejected', `${context.marker}-reopen-rejected`)
  statement = await act(context, statement, 'SUBMIT', 'chain-submit-2')
  statement = await act(context, statement, 'APPROVE', 'chain-approve-1')
  statement = await act(context, statement, 'ISSUE', 'chain-issue-1')
  if (!statement) return null
  const adjustable = list(statement.lines).slice(0, 2)
  if (adjustable.length < 2) return null
  const beforeRevisions = list(statement.revisions).length
  const adjustments = adjustable.map((line, index) => ({
    statementLineId: id(line.statementLineId ?? line.id),
    adjustedAmount: Number(line.statementAmount ?? line.amount) + (index + 1) / 100,
    reason: `${context.marker}-adjust-${index + 1}`,
  }))
  statement = await act(context, statement, 'ADJUST', 'chain-adjust', `${context.marker}-multi-line`, adjustments)
  context.assert(MODULE, '多行调整写入行值、原因并新增 revision', null,
    statement && adjustments.every((expected) => list(statement.lines).some((line) =>
      id(line.statementLineId) === expected.statementLineId
      && Number(line.statementAmount) === expected.adjustedAmount
      && line.adjustmentReason === expected.reason))
      && list(statement?.revisions).length > beforeRevisions,
    `lines=${adjustments.length}, revisions=${list(statement?.revisions).length}`, OPTIONS)
  statement = await act(context, statement, 'VOID', 'chain-void', `${context.marker}-void`)
  statement = await act(context, statement, 'REOPEN', 'chain-reopen-voided', `${context.marker}-reopen-voided`)
  statement = await act(context, statement, 'SUBMIT', 'chain-submit-final')
  statement = await act(context, statement, 'APPROVE', 'chain-approve-final')
  statement = await act(context, statement, 'ISSUE', 'chain-issue-final')
  const actions = new Set(list(statement?.revisions).map((revision) => revision.action))
  context.assert(MODULE, '完整链保留驳回、重开、调整、作废和再次出账 revision', null,
    ['RECONCILIATION_REJECT', 'RECONCILIATION_REOPEN', 'RECONCILIATION_ADJUST',
      'RECONCILIATION_VOID', 'RECONCILIATION_ISSUE'].every((action) => actions.has(action)),
    `actions=${[...actions].join(',')}`, OPTIONS)
  return statement
}

async function createReceivable(context, statement, index) {
  const body = { reconciliationStatementId: statementId(statement), currency: 'CNY' }
  const response = await write(context, 'POST', `${BASE}/receivable-settlements`, body, `ar-${index}`)
  const settlement = context.apiSuccess(MODULE, `生成第 ${index} 张应收结算单`, response,
    `statementId=${statementId(statement)}`, OPTIONS)
  if (!settlement) return null
  const replayResponse = await write(context, 'POST', `${BASE}/receivable-settlements`, body, `ar-${index}`)
  const replay = context.apiSuccess(MODULE, `第 ${index} 张应收结算单幂等重放`, replayResponse, '', OPTIONS)
  context.assert(MODULE, `第 ${index} 张 AR 幂等保持同一资源`, replayResponse,
    settlementId(replay) === settlementId(settlement), `settlementId=${settlementId(settlement)}`, OPTIONS)
  const listed = await findSettlementInOfficialList(context, 'RECEIVABLE', settlement.customerId,
    settlementId(settlement), `应收第 ${index} 张`)
  context.assert(MODULE, `第 ${index} 张 AR 正式列表金额与创建结果一致`, null,
    listed && Number(listed.totalAmount) === Number(settlement.totalAmount)
      && Number(listed.outstandingAmount) === Number(settlement.outstandingAmount),
    `createdTotal=${settlement.totalAmount ?? 'missing'}, listedTotal=${listed?.totalAmount ?? 'missing'}`, OPTIONS)
  return settlement
}

export async function run(context) {
  const start = context.steps.length
  const fixture = await normalizeFixture(context)
  if (!fixture) {
    blocker(context, '取得本轮财务全量 Fixture',
      'financeFullFixtures 必须提供匹配 marker 的 customerId/orders/feeSources；禁止猜测旧字段或历史来源',
      'missing-marker-owned-finance-fixture')
    finish(context, start)
    return
  }
  fixture.root.reconciliationPrerequisite = null
  const permissionResponse = await context.request('GET', '/api/platform/v1/iam/authorization/permissions')
  const permissions = context.apiSuccess(MODULE, '查询当前账号 Finance 有效权限', permissionResponse, '', OPTIONS)
  const granted = new Set(list(permissions).map(String))
  if (granted.has(LEGACY_STATEMENT_VIEW_PERMISSION)) {
    fixture.root.reconciliationPrerequisite = { ready: false, category: 'permission-prerequisite',
      required: [STATEMENT_LIST_PERMISSION], legacy: [LEGACY_STATEMENT_VIEW_PERMISSION] }
    blocker(context, '客户对账单旧 view 权限兼容阻断',
      `检测到旧权限=${LEGACY_STATEMENT_VIEW_PERMISSION}；列表和详情只能以正式权限=${STATEMENT_LIST_PERMISSION} 验收，旧 view 不得作为通过依据；需由 IAM 角色初始化为验收账号授予 ${STATEMENT_LIST_PERMISSION} 并移除旧资源，Finance 脚本不兼容旧权限`,
      'legacy-customer-statement-view-permission', permissionResponse)
    finish(context, start)
    return
  }
  const missingPermissions = REQUIRED_PERMISSIONS.filter((permission) => !granted.has(permission))
  if (missingPermissions.length > 0) {
    fixture.root.reconciliationPrerequisite = { ready: false, category: 'permission-prerequisite',
      required: missingPermissions, legacy: [] }
    blocker(context, 'Finance 写权限门禁',
      `缺少正式权限资源=${missingPermissions.join(',')}; 需由 IAM 角色初始化授予验收账号；对账接口将返回 A0403，禁止继续写入`,
      'missing-finance-write-permissions', permissionResponse)
    finish(context, start)
    return
  }
  const incompleteContainerSources = fixture.uncreatedSources.filter((source) => isUnboundContainerCost(source.raw))
  if (incompleteContainerSources.length > 0) {
    const evidence = incompleteContainerSources.map((source) => {
      const raw = source.raw
      return `sourceType=${raw.sourceType ?? 'missing'}, billingBasis=${raw.billingBasis ?? 'missing'}, feeSourceId=${source.feeSourceId || 'missing'}, containerBookingId=${id(raw.containerBookingId) || 'missing'}`
    }).join('; ')
    context.addCoverageGap(MODULE, SCENARIO, '忽略不完整的柜次成本尝试',
      `Finance 未返回 feeSourceId 或逐订单/运单 allocation 关联，不得作为费用来源消费：${evidence}`,
      'incomplete-container-cost-attempt', { marker: context.marker, count: incompleteContainerSources.length })
  }
  const unpublishedSources = fixture.uncreatedSources.filter((source) => !isUnboundContainerCost(source.raw))
  if (unpublishedSources.length > 0) {
    blocker(context, '本轮费用来源进入 Finance 池',
      `等待 Finance fee-pool 后仍有 ${unpublishedSources.length} 条 marker-owned 来源不可见；禁止忽略来源或改用 MANUAL_COST ID`,
      'unpublished-marker-owned-finance-source')
    finish(context, start)
    return
  }
  const invalid = fixture.sources.filter((source) => !source.feeSourceId || !source.customerId
    || !source.businessDate || !source.waybillId || source.marker !== context.marker
    || (source.direction === 'PAYABLE' && (!source.supplierId || !source.supplierName)))
  if (invalid.length > 0) {
    fixture.root.reconciliationPrerequisite = { ready: false, category: 'finance-source-prerequisite',
      invalidSourceCount: invalid.length }
    blocker(context, 'Fixture 来源契约完整',
      `存在 ${invalid.length} 条来源缺少 feeSourceId/customerId/businessDate/运单标识/marker/应付供应商快照`,
      'invalid-finance-fixture-contract')
    finish(context, start)
    return
  }

  const receivables = fixture.sources.filter((source) => source.customerId === fixture.customerId
    && source.direction === 'RECEIVABLE' && source.currency === 'CNY')
  const businessDates = new Set(receivables.map((source) => source.businessDate))
  if (receivables.length < 4 || businessDates.size < 2) {
    fixture.root.reconciliationPrerequisite = { ready: false, category: 'finance-source-prerequisite',
      receivableCount: receivables.length, businessDateCount: businessDates.size }
    blocker(context, '三张 AR 与日期范围 Fixture 门禁',
      `至少需要同客户 4 条 CNY 应收来源且跨 2 个真实 businessDate；actual sources=${receivables.length}, dates=${businessDates.size}`,
      'insufficient-receivable-date-fixture')
    finish(context, start)
    return
  }

  const allPeriod = dates(receivables)
  const currencyResponse = await write(context, 'POST', `${BASE}/statements`, {
    customerId: fixture.customerId, currency: 'USD', generationMode: 'SELECTED',
    feeSourceIds: receivables.map((source) => source.feeSourceId),
    periodStart: allPeriod.start, periodEnd: allPeriod.end, remark: `${context.marker}-usd`,
  }, 'currency-rejected')
  if (accessDenied(currencyResponse)) {
    blocker(context, 'Finance 对账写权限与当前令牌不一致',
      `POST ${BASE}/statements 返回 A0403 Access denied；customerId=${fixture.customerId}, currency=USD, requestId=${currencyResponse.requestId ?? 'null'}, traceId=${currencyResponse.traceId ?? 'null'}；有效权限查询与 Finance JWT authority 不一致，禁止继续写入`,
      'stale-finance-token-authorities', currencyResponse)
    finish(context, start)
    return
  }
  context.assert(MODULE, '对账单拒绝非 CNY 币种', currencyResponse, rejectedWith(currencyResponse, 'FIN_400'),
    `code=${currencyResponse.body?.code ?? 'missing'}`, OPTIONS)

  const cutoffDate = [...businessDates].sort()[0]
  const cutoffSources = receivables.filter((source) => source.businessDate === cutoffDate)
  if (cutoffSources.length < 2) {
    blocker(context, '日期筛选多行来源门禁',
      `最早真实 businessDate=${cutoffDate} 仅有 ${cutoffSources.length} 条来源，无法同时验证日期排除和多行调整`,
      'insufficient-same-date-receivable-sources')
    finish(context, start)
    return
  }
  // Date coverage intentionally uses SELECTED. BY_CUTOFF queries all eligible customer history.
  const remainingSources = receivables.filter((source) => source.businessDate !== cutoffDate)
  if (remainingSources.length < 2) {
    blocker(context, '跨日期三组来源门禁',
      `最早 businessDate=${cutoffDate} 之外仅有 ${remainingSources.length} 条本轮来源，无法生成三张非空独立对账单`,
      'insufficient-cross-date-receivable-sources')
    finish(context, start)
    return
  }
  const groups = [cutoffSources, ...(() => {
    return [remainingSources.slice(0, 1), remainingSources.slice(1)]
  })()]
  const issuedStatements = []
  for (let index = 0; index < groups.length; index += 1) {
    const created = await createStatement(context, groups[index], `selected-${index + 1}`,
      `创建第 ${index + 1} 张独立 SELECTED 对账单`)
    if (accessDenied(created.response)) {
      blocker(context, `第 ${index + 1} 张 SELECTED 写权限`,
        `POST ${BASE}/statements 返回 A0403 Access denied；customerId=${created.body.customerId}, currency=${created.body.currency}, sourceIds=${created.body.feeSourceIds.join(',')}, requestId=${created.response.requestId ?? 'null'}, traceId=${created.response.traceId ?? 'null'}；请求符合 DTO，但当前令牌缺少 platform:finance:reconciliation:create authority`,
        'finance-reconciliation-create-forbidden', created.response)
      finish(context, start)
      return
    }
    if (financeSubjectMissing(created.response)) {
      blocker(context, '平台财务主体 Fixture 门禁',
        `POST ${BASE}/statements 返回 FIN_409 平台财务主体未配置；sourceIds=${created.body.feeSourceIds.join(',')}, requestId=${created.response.requestId ?? 'null'}, traceId=${created.response.traceId ?? 'null'}；需在测试库 fin_subject 中提供 ACTIVE 主体`,
        'missing-active-finance-subject', created.response)
      finish(context, start)
      return
    }
    if (index === 0) {
      const customerResponse = await context.request('GET', '/api/platform/v1/iam/tenants?page=1&size=100&status=ACTIVE')
      const otherCustomer = rows(customerResponse?.body?.data)
        .find((item) => id(item?.id ?? item?.tenantId) !== fixture.customerId)
      if (otherCustomer) {
        const otherCustomerId = id(otherCustomer.id ?? otherCustomer.tenantId)
        const isolationResponse = await write(context, 'POST', `${BASE}/statements`, {
          customerId: otherCustomerId, currency: 'CNY', generationMode: 'SELECTED',
          feeSourceIds: [groups[index][0].feeSourceId], periodStart: groups[index][0].businessDate,
          periodEnd: groups[index][0].businessDate, remark: `${context.marker}-foreign`,
        }, 'cross-customer-rejected')
        context.assert(MODULE, 'SELECTED 拒绝归入其他客户的本轮来源', isolationResponse,
          rejectedWith(isolationResponse, 'FIN_404'),
          `sourceCustomerId=${fixture.customerId}, requestedCustomerId=${otherCustomerId}, code=${isolationResponse.body?.code ?? 'missing'}`, OPTIONS)
      } else {
        context.addCoverageGap(MODULE, SCENARIO, 'cross-customer-isolation',
          '未找到另一个 ACTIVE 客户，无法用本轮来源执行跨客户归属负向请求', 'missing-cross-customer-fixture')
      }
    }
    context.assert(MODULE, `第 ${index + 1} 张仅使用分组来源`, created.response,
      created.statement && sameIds(lineSourceIds(created.statement), groups[index].map((source) => source.feeSourceId)),
      `expected=${groups[index].length}, actual=${lineSourceIds(created.statement).length}`, OPTIONS)
    const issued = index === 0
      ? await issueCompleteChain(context, created.statement)
      : await issueSimple(context, created.statement, `selected-${index + 1}`)
    if (!issued) {
      blocker(context, `第 ${index + 1} 张对账单出账`, '状态流转或多行调整未返回有效结果', 'statement-issue-failed')
      finish(context, start)
      return
    }
    await verifyIssuedStatementReadback(context, fixture, issued, `第 ${index + 1} 张已出账对账单`)
    issuedStatements.push(issued)
    if (index === 0) {
      context.assert(MODULE, 'SELECTED 日期范围只包含指定真实日期来源', created.response,
        created.body.periodStart === cutoffDate && created.body.periodEnd === cutoffDate
          && sameIds(lineSourceIds(created.statement), cutoffSources.map((source) => source.feeSourceId))
          && lineSourceIds(created.statement).every((source) => !receivables
            .filter((item) => item.businessDate !== cutoffDate)
            .some((item) => item.feeSourceId === source)),
        `date=${cutoffDate}, expected=${cutoffSources.length}, actual=${lineSourceIds(created.statement).length}`, OPTIONS)
    }
  }

  const receivableSettlements = []
  for (let index = 0; index < issuedStatements.length; index += 1) {
    const settlement = await createReceivable(context, issuedStatements[index], index + 1)
    if (settlement) receivableSettlements.push(settlement)
  }
  if (receivableSettlements.length !== 3) {
    blocker(context, '生成三张独立 AR', `expected=3, actual=${receivableSettlements.length}`, 'three-ar-creation-failed')
  }

  const payables = fixture.sources.filter((source) => source.customerId === fixture.customerId
    && source.direction === 'PAYABLE' && source.currency === 'CNY')
  const payableSupplierIds = new Set(payables.map((source) => source.supplierId).filter(Boolean))
  let payableSettlement = null
  if (payables.length > 0 && payableSupplierIds.size === 1 && payables.every((source) => source.supplierId)) {
    const dueDate = [...new Set(payables.map((source) => source.businessDate))].sort().at(-1)
    const supplierId = [...payableSupplierIds][0]
    const supplierName = payables.find((source) => source.supplierId === supplierId)?.supplierName ?? null
    const body = { customerId: fixture.customerId, supplierId,
      feeSourceIds: payables.map((source) => source.feeSourceId), dueDate, currency: 'CNY' }
    const response = await write(context, 'POST', `${BASE}/payable-settlements`, body, 'payable-settlement')
    payableSettlement = context.apiSuccess(MODULE, '按 Fixture PAYABLE 与 supplierId 生成应付结算单',
      response, `sources=${payables.length}, supplierId=${supplierId}, supplierName=${supplierName ?? 'null'}`, OPTIONS)
    if (payableSettlement) {
      const listed = await findSettlementInOfficialList(context, 'PAYABLE', fixture.customerId,
        settlementId(payableSettlement), '应付')
      context.assert(MODULE, 'AP 正式列表供应商与金额和创建结果一致', null,
        listed && id(listed.supplierId) === id(payableSettlement.supplierId)
          && Number(listed.totalAmount) === Number(payableSettlement.totalAmount),
        `createdSupplier=${id(payableSettlement.supplierId)}, listedSupplier=${id(listed?.supplierId) || 'missing'}`, OPTIONS)
    }
    if (!payableSettlement) {
      blocker(context, 'PAYABLE 真实接口创建失败',
        `HTTP=${response.http}, code=${response.body?.code ?? 'missing'}, requestId=${response.requestId ?? 'null'}, traceId=${response.traceId ?? 'null'}`,
        'payable-settlement-api-failure', response)
    }
  } else {
    blocker(context, 'PAYABLE 结算 Fixture 门禁',
      `需要至少一条同客户 CNY PAYABLE，且全部提供相同 supplierId；sources=${payables.length}, suppliers=${payableSupplierIds.size}`,
      'insufficient-payable-supplier-fixture')
  }

  const statementRows = [
    { kind: 'SELECTED_DATE', statementId: statementId(issuedStatements[0]), status: issuedStatements[0].status,
      version: issuedStatements[0].version, feeSourceIds: cutoffSources.map((source) => source.feeSourceId),
      periodStart: cutoffDate, periodEnd: cutoffDate },
    ...issuedStatements.map((statement, index) => ({ kind: index === 0 ? 'SELECTED_FULL_CHAIN' : 'SELECTED',
      statementId: statementId(statement), status: statement.status, version: statement.version,
      feeSourceIds: groups[index].map((source) => source.feeSourceId),
      periodStart: dates(groups[index]).start, periodEnd: dates(groups[index]).end })),
  ]
  const arRows = receivableSettlements.map((settlement, index) => ({
    settlementId: settlementId(settlement), statementId: statementId(issuedStatements[index]),
    direction: settlement.direction, status: settlement.status, paymentStatus: settlement.paymentStatus,
    version: settlement.version,
  }))
  fixture.root.statements = statementRows
  fixture.root.statementMap = { byCutoff: statementRows[0], fullChain: statementRows[1],
    selected: statementRows.slice(1) }
  fixture.root.receivableSettlements = arRows
  fixture.root.receivableSettlementMap = { byStatementId: Object.fromEntries(arRows.map((row) => [row.statementId, row])) }
  fixture.root.payableSettlements = payableSettlement ? [{
    settlementId: settlementId(payableSettlement), direction: payableSettlement.direction,
    supplierId: id(payableSettlement.supplierId),
    supplierName: payableSettlement.supplierName ?? payables[0]?.supplierName ?? null,
    status: payableSettlement.status,
    paymentStatus: payableSettlement.paymentStatus, version: payableSettlement.version,
    feeSourceIds: payables.map((source) => source.feeSourceId),
  }] : []
  fixture.root.sourceMappings = fixture.sourceMappings
  await verifyCustomerAccountAndLedger(context, fixture)
  finish(context, start)
}