import fs from 'node:fs'
import {createHash} from 'node:crypto'
import {resolve,dirname} from 'node:path'
import {fileURLToPath,pathToFileURL} from 'node:url'
import {AcceptanceRun} from './admin-test-env-acceptance.mjs'
import {redactEvidence} from './fba-core-regression-test-env.mjs'
import {parseCrossCustomerArguments,runCrossCustomer} from './fleet-cross-customer-test-env.mjs'
import {fixtureContract} from './admin-test-env-modules/fleet-cross-customer-acceptance.mjs'
import {version} from './admin-test-env-modules/grouped-dispatch-acceptance.mjs'
import {verifyFleetExternalReceipt} from './admin-test-env-modules/fleet-external-receipt-acceptance.mjs'
import {verifyFleetExternalDispatch} from './admin-test-env-modules/fleet-external-dispatch-acceptance.mjs'
import {expectedAllocations} from './admin-test-env-modules/fleet-trip-cost-acceptance.mjs'

const ROOT='/api/platform/v1/last-leg',PDA='/api/pda/v1/last-leg/dispatches',MODULE='fleet-same-route-cost'
const REPO=resolve(dirname(fileURLToPath(import.meta.url)),'..')
const demand=(value,message)=>{if(!value)throw Error(message)}
const id=value=>{demand(typeof value!=='number'||Number.isSafeInteger(value),'UNSAFE_ID');return String(value??'')}
const integer=value=>{demand(['number','string'].includes(typeof value)&&/^(0|[1-9]\d*)$/.test(id(value))&&Number.isSafeInteger(Number(value)),'INVALID_QUANTITY');return Number(value)}
const sorted=value=>Array.isArray(value)?value.map(sorted):value&&typeof value==='object'?Object.fromEntries(Object.keys(value).sort().map(key=>[key,sorted(value[key])])):value
const same=(a,b)=>JSON.stringify(sorted(a))===JSON.stringify(sorted(b))
const cents=value=>{const text=String(value);demand(/^\d+(?:\.\d{1,2})?$/.test(text),'INVALID_MONEY');const [whole,fraction='']=text.split('.');return BigInt(whole)*100n+BigInt(fraction.padEnd(2,'0'))}
const encode=encodeURIComponent
const actualValue=(row,field)=>row?.evidence?.some(e=>e.field===field&&e.actual===true&&e.sourceType&&e.sourceBusinessNo&&Number.isFinite(Date.parse(e.observedAt))&&Number(e.value)===Number(row[field]))

// Capacity planning may precede picking. Read native physical pallets and their actual evidence;
// never pass capacity-plan cargo to the loading helper or supply invented picked counts.
export function sameRouteMeasurements(context,fixture,trip,preview,{external=false}={}) {
  demand(preview?.dispatchNo===fixture.dispatchNo&&preview.status==='ACTIVE'&&preview.pallets?.length,'CURRENT_NATIVE_PHYSICAL_PREVIEW_REQUIRED')
  const supplied=fixture.loadingMeasurements
  demand(!supplied||supplied.environment==='TEST'&&supplied.marker===context.marker&&supplied.dispatchNo===fixture.dispatchNo&&Array.isArray(supplied.pallets),'CURRENT_TEST_MEASUREMENT_RECEIPT_REQUIRED')
  const actual=structuredClone(supplied?.pallets||[]),receipt=external?trip.externalReceipt?.finalBooking?.receipt:null
  demand(new Set(preview.pallets.map(p=>id(p.warehousePalletId))).size===preview.pallets.length&&preview.pallets.every(p=>id(p.warehousePalletId)&&p.palletNo),'CURRENT_NATIVE_PHYSICAL_PALLET_IDENTITY_REQUIRED')
  if(external){
    demand(trip.externalReceipt?.status==='VERIFIED'&&receipt?.operatorId&&Number.isFinite(Date.parse(receipt.confirmedAt))&&receipt.source?.incomingNo,'ACTUAL_EXTERNAL_MEASUREMENT_REQUIRED')
    for(const measured of receipt.pallets||[]){
      const source=receipt.source.pallets?.find(p=>id(p.warehousePalletId)===id(measured.warehousePalletId))
      demand(source,'ACTUAL_EXTERNAL_MEASUREMENT_REQUIRED')
      actual.push({warehousePalletId:id(measured.warehousePalletId),palletSpaces:measured.palletSpaces,weightKg:measured.weightKg??source.weightKg,volumeCbm:measured.volumeCbm??source.volumeCbm,
        deliveryIndex:trip.stops.findIndex(stop=>stop.destinationKey===trip.externalReceipt.finalBooking.cargo.destinationKey),
        evidence:['palletSpaces','weightKg','volumeCbm'].map(field=>({field,value:field==='palletSpaces'?measured[field]:measured[field]??source[field],actual:true,
          sourceType:'FLEET_RECEIPT_CONFIRMATION',sourceBusinessNo:receipt.source.incomingNo,observedAt:receipt.confirmedAt}))})
    }
  }
  demand(new Set(actual.map(p=>id(p.warehousePalletId))).size===actual.length,'DUPLICATE_ACTUAL_MEASUREMENT')
  const expected=new Set([...preview.pallets.map(p=>id(p.warehousePalletId)),...(receipt?.source?.pallets||[]).map(p=>id(p.warehousePalletId))])
  demand(actual.every(p=>expected.has(id(p.warehousePalletId))),'FOREIGN_ACTUAL_MEASUREMENT')
  const pallets=[...expected].map(palletId=>{
    const physical=preview.pallets.find(p=>id(p.warehousePalletId)===palletId),suppliedRow=actual.find(p=>id(p.warehousePalletId)===palletId),output={warehousePalletId:palletId,evidence:[]}
    const sourceBusinessNo=fixture.members?.find(m=>id(m.palletId)===palletId)?.incomingNo||(receipt?.source?.pallets?.some(p=>id(p.warehousePalletId)===palletId)?receipt.source.incomingNo:null)
    demand(sourceBusinessNo,'CURRENT_MEASUREMENT_SOURCE_REQUIRED')
    for(const field of ['palletSpaces','weightKg','volumeCbm']){
      const row=physical?.[field]==null?suppliedRow:physical,value=row?.[field]
      demand(Number.isFinite(Number(value))&&Number(value)>0&&actualValue(row,field),'ACTUAL_LOADING_MEASUREMENT_REQUIRED:'+field)
      demand(actualValue({...row,evidence:row.evidence.filter(e=>e.sourceBusinessNo===sourceBusinessNo)},field),'CURRENT_MEASUREMENT_SOURCE_REQUIRED')
      demand(field!=='palletSpaces'||Number.isSafeInteger(value),'ACTUAL_PALLET_SPACES_MUST_BE_INTEGER')
      demand(physical?.[field]==null||suppliedRow?.[field]==null||Number(physical[field])===Number(suppliedRow[field]),'ACTUAL_MEASUREMENT_CONFLICT')
      output[field]=value;output.evidence.push(...row.evidence.filter(e=>e.field===field))
    }
    output.deliveryIndex=physical?.deliveryIndex??suppliedRow?.deliveryIndex
    demand(Number.isSafeInteger(output.deliveryIndex)&&output.deliveryIndex>0&&trip.stops?.[output.deliveryIndex]?.destinationKey,'ACTUAL_UNLOADING_STOP_REQUIRED')
    demand(physical?.deliveryIndex==null||suppliedRow?.deliveryIndex==null||physical.deliveryIndex===suppliedRow.deliveryIndex,'ACTUAL_UNLOADING_STOP_CONFLICT')
    return output
  })
  return {environment:'TEST',marker:context.marker,dispatchNo:fixture.dispatchNo,pallets}
}

export function assertSameRouteBasis(departure,shares) {
  const load=departure?.snapshot?.confirmedLoad,stops=departure?.snapshot?.trip?.stops
  demand(departure?.action==='DEPART'&&load?.manifestHash,'ACTUAL_DEPART_HISTORY_REQUIRED');version(departure.recordVersion)
  demand(shares?.length===2&&shares.filter(s=>s.sourceType==='OWN').length===1&&shares.filter(s=>s.sourceType==='EXTERNAL').length===1,'TWO_ACTUAL_BUSINESS_COST_SOURCES_REQUIRED')
  const own=shares.find(s=>s.sourceType==='OWN'),external=shares.find(s=>s.sourceType==='EXTERNAL')
  demand(own.dispatchNo&&own.businessNo===own.dispatchNo&&external.dispatchNo===own.dispatchNo&&external.businessNo!==own.businessNo,'ONE_NATIVE_MAIN_TWO_BUSINESS_IDENTITIES_REQUIRED')
  demand(own.warehousePalletIds?.length===2&&external.warehousePalletIds?.length===1&&shares.every(s=>Number.isSafeInteger(s.palletSpaces)&&s.palletSpaces>0),'THREE_ACTUAL_PHYSICAL_PALLETS_REQUIRED')
  const ids=shares.flatMap(s=>s.warehousePalletIds).map(id)
  demand(new Set(ids).size===3&&load.pallets?.length===3&&same([...ids].sort(),load.pallets.map(p=>id(p.warehousePalletId)).sort()),'COMPLETE_DEPART_PALLET_SCOPE_REQUIRED')
  demand(load.cargo?.length>=3&&new Set(load.pallets.map(p=>p.deliveryIndex)).size===1&&load.pallets.every(p=>Number.isSafeInteger(p.deliveryIndex)&&p.deliveryIndex>0&&stops?.[p.deliveryIndex]?.destinationKey),'SINGLE_REAL_UNLOADING_STOP_REQUIRED')
  demand(load.cargo.every(c=>ids.includes(id(c.warehousePalletId))),'FOREIGN_DEPART_CARGO')
  for(const share of shares){
    const pallets=load.pallets.filter(p=>share.warehousePalletIds.map(id).includes(id(p.warehousePalletId)))
    demand(pallets.every(p=>Number.isSafeInteger(p.palletSpaces)&&p.palletSpaces>0)&&pallets.reduce((sum,p)=>sum+p.palletSpaces,0)===share.palletSpaces,'ACTUAL_CAPACITY_SUM_REQUIRED')
    for(const pallet of pallets){
      const cargo=load.cargo.filter(c=>id(c.warehousePalletId)===id(pallet.warehousePalletId))
      demand(cargo.length>0&&cargo.every(c=>c.dispatchNo===share.dispatchNo&&id(c.customerId)&&integer(c.packages)>0&&c.destinationKey===stops[pallet.deliveryIndex].destinationKey)
        &&cargo.reduce((sum,c)=>sum+integer(c.packages),0)===1&&new Set(cargo.map(c=>id(c.customerId))).size===1,'SOURCE_AND_DESTINATION_MISMATCH')
    }
  }
  const ownCustomers=new Set(load.cargo.filter(c=>own.warehousePalletIds.map(id).includes(id(c.warehousePalletId))).map(c=>id(c.customerId)))
  demand(ownCustomers.size===2&&same([...ownCustomers].sort(),own.customerIds?.map(id).sort())&&ownCustomers.has(id(external.customerId)),'TWO_REAL_OWN_CUSTOMERS_REQUIRED')
  const externals=(departure.snapshot.externalBookings||[]).filter(b=>!['DRAFT','CANCELLED'].includes(b.status)),booking=externals[0]
  const accepted=booking?.receipt,physical=accepted?.source?.pallets
  demand(externals.length===1&&booking.status==='BOUND'&&booking.bookingNo===external.businessNo&&booking.dispatchNo===external.dispatchNo&&id(booking.customerId)===id(external.customerId)
    &&integer(accepted?.source?.receivedPackages)===1&&physical?.length===1&&integer(physical[0].packages)===1&&id(physical[0].warehousePalletId)===id(external.warehousePalletIds[0])
    &&load.cargo.filter(c=>id(c.warehousePalletId)===id(physical[0].warehousePalletId)).every(c=>id(c.customerId)===id(booking.customerId)),'ACTUAL_EXTERNAL_RECEIPT_REQUIRED')
  demand(accepted.pallets?.length===1&&id(accepted.pallets[0].warehousePalletId)===id(physical[0].warehousePalletId)&&accepted.pallets[0].palletSpaces===external.palletSpaces,'ACTUAL_EXTERNAL_CAPACITY_REQUIRED')
  return load
}

export function sameRouteShares(departure,fixture,receipt,bundle) {
  demand(bundle?.detail?.dispatchNo===fixture.dispatchNo&&bundle.items?.dispatchNo===fixture.dispatchNo&&id(version(bundle.detail.recordVersion))===id(version(bundle.items.recordVersion)),'NATIVE_DETAIL_ITEMS_REQUIRED')
  const members=fixture.members,externalId=id(receipt.warehousePalletId),ownIds=members.map(m=>id(m.palletId))
  const items=bundle.items.items,load=departure?.snapshot?.confirmedLoad
  demand(items?.length===3&&new Set(items.map(i=>id(i.warehousePalletId))).size===3&&members.every(m=>items.some(i=>id(i.warehousePalletId)===id(m.palletId)&&id(i.customerId)===id(m.customerId)&&i.inboundCode===m.incomingNo&&integer(i.scheduledPackages)===1))
    &&items.some(i=>id(i.warehousePalletId)===externalId&&id(i.customerId)===id(receipt.createRequest.customerId)&&i.inboundCode===receipt.incomingNo&&integer(i.scheduledPackages)===1),'CURRENT_THREE_SOURCE_ITEMS_REQUIRED')
  demand(load?.pallets?.length===3,'ACTUAL_DEPART_HISTORY_REQUIRED')
  const spaces=ids=>load.pallets.filter(p=>ids.includes(id(p.warehousePalletId))).reduce((sum,p)=>{demand(Number.isSafeInteger(p.palletSpaces)&&p.palletSpaces>0,'ACTUAL_CAPACITY_SUM_REQUIRED');return sum+p.palletSpaces},0)
  const shares=[{businessNo:fixture.dispatchNo,dispatchNo:fixture.dispatchNo,sourceType:'OWN',customerIds:members.map(m=>id(m.customerId)),warehousePalletIds:ownIds,palletSpaces:spaces(ownIds)},
    {businessNo:receipt.bookingNo,dispatchNo:fixture.dispatchNo,sourceType:'EXTERNAL',customerId:id(receipt.createRequest.customerId),warehousePalletIds:[externalId],palletSpaces:spaces([externalId])}]
  assertSameRouteBasis(departure,shares);return shares
}

export function assertSameRouteCost(summary,departure,shares,amount='1.00') {
  const load=assertSameRouteBasis(departure,shares)
  demand(summary?.allocationMethod==='SAME_ROUTE_PALLET_SPACES'&&summary.allocationBlockReason==null&&id(summary.departureVersion)===id(departure.recordVersion)&&summary.manifestHash===load.manifestHash,'IMMUTABLE_DEPART_BASIS_REQUIRED')
  demand(summary.totals?.length===1&&summary.totals[0].currency==='USD','SINGLE_ORIGINAL_CURRENCY_REQUIRED')
  const total=summary.totals[0],expected=expectedAllocations(amount,shares),actual=[...(total.allocations||[])].sort((a,b)=>a.businessNo<b.businessNo?-1:a.businessNo>b.businessNo?1:0).map(s=>({businessNo:s.businessNo,sourceType:s.sourceType,dispatchNo:s.dispatchNo,palletSpaces:integer(s.palletSpaces),cents:String(cents(s.amount))}))
  demand(cents(total.directCost)===cents(amount)&&same(actual,expected),'EXACT_LARGEST_REMAINDER_ALLOCATION_REQUIRED')
  demand(cents(total.ownCost)===expected.filter(s=>s.sourceType==='OWN').reduce((sum,s)=>sum+BigInt(s.cents),0n)&&cents(total.externalCost)===expected.filter(s=>s.sourceType==='EXTERNAL').reduce((sum,s)=>sum+BigInt(s.cents),0n)&&cents(total.ownCost)+cents(total.externalCost)===cents(amount),'OWN_EXTERNAL_CENT_CONSERVATION_REQUIRED')
  return expected
}

// Explicit test fees belong to each actual own customer/destination group. The
// received external pallet shares its customer's group and retains its own quote.
export function sameRouteArrangement(context,fixture) {
  demand(context.marker===fixture.marker&&fixture.dispatchNo&&fixture.members?.length===2&&new Set(fixture.members.map(m=>id(m.customerId))).size===2
    &&fixture.members.every(m=>m.marker===context.marker&&m.dispatchNo===fixture.dispatchNo&&/^[1-9]\d*$/.test(id(m.customerId))&&m.destination?.key?.startsWith('FBA:'))
    &&new Set(fixture.members.map(m=>m.destination.key)).size===1,'CURRENT_TWO_CUSTOMER_DESTINATION_GROUPS_REQUIRED')
  return {mode:'NATIVE',marker:context.marker,dispatchNo:fixture.dispatchNo,plannedDeliveryAt:new Date(Date.now()+21600000).toISOString(),
    deliveryMethod:'TRUCK_PALLET',pickupMethod:'WAREHOUSE_PICKUP',loadingType:'PALLET',appointmentAccount:'SELF',vehicleType:'TRUCK',remark:`${context.marker} TEST synthetic customer delivery fees`,
    groups:fixture.members.map(m=>({customerId:id(m.customerId),destinationKey:m.destination.key,
      fees:[{direction:'RECEIVABLE',feeType:'DELIVERY_FEE',feeName:'本轮合成测试派送费',currency:'CNY',amount:'30.00'}]}))}
}

// Unknown writes stop this proof and all dispatch helpers sharing the context.
export function sameRouteIo(context,proof) {
  demand(typeof context.checkpoint==='function','DURABLE_CHECKPOINT_REQUIRED')
  context.createdResources.dispatchWriteBoundary??={stopped:false}
  const boundary=context.createdResources.dispatchWriteBoundary
  const check=(label,condition)=>{context.assert(MODULE,label,null,Boolean(condition),'',{scenario:MODULE,deploymentBlocker:true});demand(condition,label)}
  const send=async(method,path,body,token=context.token,multipart=false)=>{
    const write=!['GET','HEAD'].includes(method)
    demand(!write||!boundary.stopped,'UNKNOWN_WRITE_RESULT_STOPPED')
    const entry={method,path,body:multipart?{name:body.name,type:body.type,sizeBytes:body.content.byteLength}:structuredClone(body),status:'SENDING'}
    proof.requests.push(entry)
    try{await context.checkpoint()}catch(error){boundary.stopped=true;entry.status='NOT_SENT';throw error}
    let response
    try{response=await (multipart?context.requestMultipart(method,path,body,token):context.request(method,path,body,token))}
    catch(error){entry.status='UNKNOWN_RESULT';if(write){boundary.stopped=true;boundary.outcomeUnknown=true;proof.outcomeUnknown=true}await context.checkpoint();throw error}
    const unknown=write&&(!response?.http||response.http>=500||response.body?.code==null||String(response.body.code)==='200'&&response.body.data==null)
    Object.assign(entry,{status:unknown?'UNKNOWN_RESULT':'RESPONDED',http:response?.http,code:response?.body?.code,requestId:response?.requestId,traceId:response?.traceId,result:structuredClone(response?.body?.data)})
    if(unknown){boundary.stopped=true;boundary.outcomeUnknown=true;proof.outcomeUnknown=true}
    try{await context.checkpoint()}catch(error){if(write)boundary.stopped=true;throw error}
    check(`${method} ${path}`,!unknown&&response?.http===200&&id(response.body?.code)==='200'&&response.requestId&&response.traceId)
    return response.body.data
  }
  return {check,request:send,upload:(path,body)=>send('POST',path,body,context.token,true)}
}

export async function verifySameRouteCost(context,fixture,{execute=false,readInventory}={}) {
  if(!execute)return {scope:'SAME_ROUTE_COST_WITH_TWO_OWN_AND_ONE_EXTERNAL',businessSqlWrites:false}
  demand(context?.marker===fixture?.marker&&context?.marker&&fixture.stage===fixtureContract.stage&&fixture.dispatchNo&&fixture.pdaToken&&fixture.members?.length===2
    &&fixture.members.every(m=>m.marker===context.marker&&m.dispatchNo===fixture.dispatchNo&&m.receiptVerified===true)&&new Set(fixture.members.map(m=>id(m.customerId))).size===2
    &&fixture.tripProof?.dispatchNo===fixture.dispatchNo&&context.createdResources?.fleetTrips?.includes(fixture.tripProof)&&typeof readInventory==='function','CURRENT_TWO_CUSTOMER_FIXTURE_REQUIRED')
  demand(!context.createdResources.fleetSameRouteCost,'SAME_ROUTE_VERIFICATION_ALREADY_STARTED')
  const proof=context.createdResources.fleetSameRouteCost={status:'CHECKING',tripNo:fixture.tripNo,dispatchNo:fixture.dispatchNo,marker:context.marker,scope:'SAME_ROUTE_COST_WITH_TWO_OWN_AND_ONE_EXTERNAL',snapshots:{},requests:[]}
  const {check,request,upload}=sameRouteIo(context,proof),trip=fixture.tripProof,base=`${ROOT}/fleet/trips/${encode(fixture.tripNo)}`,path=`${ROOT}/dispatches/${encode(fixture.dispatchNo)}`,pdaPath=`${PDA}/${encode(fixture.dispatchNo)}`,key=suffix=>`${context.marker}-SAME-${suffix}`
  const inventory=async label=>{
    const rows=[]
    for(const customerId of [...new Set(fixture.members.map(m=>id(m.customerId)))]){
      const scope={marker:context.marker,customerId,warehouseId:id(fixture.warehouseId)},raw=await readInventory(scope)
      check('Inventory reader proves complete current customer and warehouse',same(raw?.scope,{...scope,coverage:'CUSTOMER_WAREHOUSE_COMPLETE'}))
      for(const collection of ['balances','positions','ledger'])check('Raw customer inventory has unique owned rows',Array.isArray(raw[collection])&&new Set(raw[collection].map(r=>id(r.id))).size===raw[collection].length&&raw[collection].every(r=>id(r.customerId)===customerId&&id(r.overseasWarehouseId)===scope.warehouseId))
      for(const balance of raw.balances){
        for(const field of ['inTransitPackages','procurementPackages'])integer(balance[field])
        for(const field of ['availablePackages','holdPackages','allocatedPackages','pickedPackages','receivingPackages'])check('All raw position buckets conserve their balance',integer(balance[field])===raw.positions.filter(p=>id(p.balanceId)===id(balance.id)).reduce((sum,p)=>sum+integer(p[field]),0))
      }
      check('No orphan physical positions',raw.positions.every(p=>raw.balances.some(b=>id(b.id)===id(p.balanceId))))
      rows.push(raw)
    }
    proof.snapshots[label]=rows;await context.checkpoint();return rows
  }
  try{
    const detail=await request('GET',base),plan=await request('GET',`${base}/capacity-plan`),physical=await request('GET',`${path}/loading`)
    check('Two own physical sources share one native dispatch and FBA stop',detail.dispatches?.length===1&&detail.dispatches[0].dispatchNo===fixture.dispatchNo&&plan.cargo?.length===2&&plan.cargo.every(c=>c.dispatchNo===fixture.dispatchNo)&&new Set(plan.cargo.map(c=>c.destinationKey)).size===1&&plan.cargo.every(c=>c.destinationKey?.startsWith('FBA:')))
    check('Capacity uses exactly both current receipt pallets before any scanning',physical.pallets?.length===2&&fixture.members.every(m=>physical.pallets.some(p=>id(p.warehousePalletId)===id(m.palletId)&&p.palletNo===m.palletNo&&integer(p.scheduledPackages)===1&&integer(p.pickedPackages)===0)))
    trip.stops=detail.trip.stops
    const measured=sameRouteMeasurements(context,fixture,trip,physical)
    proof.capacityRequest={recordVersion:version(plan.recordVersion),manifestHash:plan.manifestHash,pallets:measured.pallets.map(({evidence,...p})=>p),reason:context.marker}
    const planned=await request('POST',`${base}/capacity-plan`,proof.capacityRequest)
    check('Actual capacity plan is valid',planned.planValid===true)
    await verifyFleetExternalReceipt(context,MODULE,trip,fixture.pdaToken)
    const beforePick=await inventory('BEFORE_PICK')
    const measurements=sameRouteMeasurements(context,fixture,trip,await request('GET',`${path}/loading`),{external:true})
    proof.arrangementSource=sameRouteArrangement(context,fixture);await context.checkpoint()
    await verifyFleetExternalDispatch(context,MODULE,trip,{pickerToken:fixture.pdaToken,actualMeasurements:measurements,arrangement:proof.arrangementSource})
    const receipt=trip.externalReceipt,external=trip.externalDispatch
    check('Actual external source is added to the same original main',receipt?.status==='VERIFIED'&&external?.status==='VERIFIED'&&external.dispatchNo===fixture.dispatchNo)
    const members=proof.members=[...fixture.members.map(m=>({...m})),{customerId:id(external.customerId),dispatchNo:fixture.dispatchNo,incomingNo:receipt.incomingNo,palletId:id(receipt.warehousePalletId),palletNo:receipt.palletNo,
      positionId:id(receipt.finalInventory.positions[0].id),balanceId:id(receipt.finalInventory.positions[0].balanceId)}]
    check('Exactly three distinct original physical pallets and positions',new Set(members.map(m=>id(m.palletId))).size===3&&new Set(members.map(m=>id(m.positionId))).size===3)
    const stock=await inventory('PICKED')
    for(const member of members){
      const before=beforePick.find(s=>id(s.scope.customerId)===id(member.customerId)),after=stock.find(s=>id(s.scope.customerId)===id(member.customerId))
      check('Original one-box position alone is depleted by scanning',before.positions.some(p=>id(p.id)===member.positionId&&integer(p.availablePackages)===1)&&after.positions.some(p=>id(p.id)===member.positionId&&integer(p.availablePackages)===0))
      const shipped=after.ledger.filter(r=>!before.ledger.some(old=>id(old.id)===id(r.id))&&r.businessType==='SHIP'&&id(r.positionId)===member.positionId)
      check('Exactly one actual SHIP per original position',shipped.length===1&&shipped[0].businessOrderNo===fixture.dispatchNo&&Number(shipped[0].deltaPackages)===-1)
    }
    for(const before of beforePick){
      const after=stock.find(s=>id(s.scope.customerId)===id(before.scope.customerId)),owned=members.filter(m=>id(m.customerId)===id(before.scope.customerId)),oldIds=new Set(before.ledger.map(r=>id(r.id)))
      check('All original immutable inventory movements remain exact',same(before.ledger,after.ledger.filter(r=>oldIds.has(id(r.id)))))
      const added=after.ledger.filter(r=>!oldIds.has(id(r.id)))
      check('Only one ALLOCATE PICK SHIP sequence exists per physical source',added.length===owned.length*3&&owned.every(m=>['ALLOCATE','PICK','SHIP'].every(type=>added.filter(r=>r.businessType===type&&id(r.positionId)===m.positionId&&r.businessOrderNo===fixture.dispatchNo&&Number(r.deltaPackages)===(type==='SHIP'?-1:1)).length===1)))
      const quantities=raw=>Object.fromEntries(['balances','positions'].map(collection=>[collection,raw[collection].map(row=>({id:id(row.id),...Object.fromEntries(['availablePackages','holdPackages','allocatedPackages','pickedPackages','receivingPackages',...(collection==='balances'?['inTransitPackages','procurementPackages']:[])].map(field=>[field,integer(row[field])]))}))]))
      const expected=structuredClone(before)
      for(const member of owned){
        expected.positions.find(p=>id(p.id)===member.positionId).availablePackages=0
        const balance=expected.balances.find(b=>id(b.id)===member.balanceId);balance.availablePackages=integer(balance.availablePackages)-1
      }
      check('Exactly each own customer position and balance loses its single physical box',same(quantities(expected),quantities(after)))
    }
    const current={detail:await request('GET',path),items:await request('GET',`${path}/items`)},ready=await request('GET',pdaPath,undefined,fixture.pdaToken)
    check('All three boxes are loaded and arranged before native departure',current.detail.status==='ACTIVE'&&current.detail.stage==='AFTER_LOADING'&&current.detail.pickingReconciled===true&&integer(current.detail.counts.packageCount)===3&&integer(current.detail.counts.pickedPackageCount)===3&&integer(current.detail.counts.shippedPackageCount)===0
      &&ready.dispatchNo===fixture.dispatchNo&&ready.status==='ACTIVE'&&ready.stage==='AFTER_LOADING'&&ready.pickingReconciled===true&&id(ready.warehouseId)===id(fixture.warehouseId)&&id(version(ready.recordVersion))===id(version(current.detail.recordVersion))&&ready.actions?.DEPART?.allowed===true&&current.detail.actions?.DEPART?.allowed===true)
    const deliveries=proof.deliveries=current.detail.documents?.deliveries
    check('Exactly two customer-isolated deliveries cover three actual boxes',deliveries?.length===2&&new Set(deliveries.map(d=>d.deliveryNo)).size===2&&deliveries.reduce((sum,d)=>sum+integer(d.packageCount),0)===3&&members.every(m=>deliveries.some(d=>id(d.customerId)===id(m.customerId))))
    const outbounds=current.detail.documents.outbounds
    check('Each delivery belongs to exactly its real customer outbound',outbounds?.length===2&&new Set(outbounds.map(o=>o.outboundNo)).size===2&&outbounds.every(o=>deliveries.filter(d=>d.outboundNo===o.outboundNo&&id(d.customerId)===id(o.customerId)).reduce((sum,d)=>sum+integer(d.packageCount),0)===integer(o.packageCount)))
    proof.departureRequest={recordVersion:version(ready.recordVersion),idempotencyKey:key('DEPART'),remark:context.marker}
    proof.departure=await request('POST',`${pdaPath}/depart`,proof.departureRequest,fixture.pdaToken)
    check('One native departure covers the whole current main',proof.departure.dispatchNo===fixture.dispatchNo&&proof.departure.action==='DEPART'&&proof.departure.status==='ACTIVE'&&proof.departure.stage==='DELIVERING'&&integer(proof.departure.result?.shippedPackages)===3&&BigInt(version(proof.departure.recordVersion))>BigInt(version(ready.recordVersion))
      &&proof.departure.result.deliveries?.length===deliveries.length&&deliveries.every(d=>proof.departure.result.deliveries.some(r=>r.deliveryNo===d.deliveryNo&&r.outboundNo===d.outboundNo&&id(r.customerId)===id(d.customerId)&&integer(r.packageCount)===integer(d.packageCount))))
    const departedTrip=proof.departedTrip=await request('GET',base),departed=await request('GET',path),replay=await request('POST',`${path}/depart`,proof.departureRequest)
    check('Actual main and its single resource record are delivering in transit',departedTrip.trip?.status==='IN_TRANSIT'&&departedTrip.dispatches?.length===1&&departedTrip.dispatches[0].dispatchNo===fixture.dispatchNo&&departed.status==='ACTIVE'&&departed.stage==='DELIVERING'&&integer(departed.counts.shippedPackageCount)===3&&id(version(departed.recordVersion))===id(version(proof.departure.recordVersion)))
    check('Platform replay returns the original PDA departure and version',replay.replayed===true&&id(version(replay.recordVersion))===id(version(proof.departure.recordVersion))&&same(replay.result,proof.departure.result))
    check('Departure and replay do not deduct stock again or mutate facts',same(departedTrip,await request('GET',base))&&same(departed,await request('GET',path))&&same(stock,await inventory('DEPARTED')))
    const history=await request('GET',`${base}/history?page=1&size=200`)
    check('Complete history has one immutable actual departure',integer(history.total)===history.records.length&&history.records.filter(r=>r.action==='DEPART').length===1)
    const departure=proof.departureHistory=history.records.find(r=>r.action==='DEPART'),shares=proof.shares=sameRouteShares(departure,fixture,receipt,current)
    const costPath=`${base}/costs`,before=await request('GET',`${costPath}?page=1&size=100`)
    check('Fresh trip has no prior costs',integer(before.page.total)===0&&before.page.records.length===0&&before.summary.totals.length===0)
    check('Empty query already locks actual departure basis',before.summary.allocationMethod==='SAME_ROUTE_PALLET_SPACES'&&before.summary.allocationBlockReason==null&&id(before.summary.departureVersion)===id(departure.recordVersion)&&before.summary.manifestHash===departure.snapshot.confirmedLoad.manifestHash)
    proof.costRequest={idempotencyKey:key('COST-USD'),details:{category:'FUEL',currency:'USD',amount:'1.00',incurredAt:new Date().toISOString(),remark:`${context.marker} TEST synthetic cost`}}
    const cost=proof.cost=await request('POST',costPath,proof.costRequest),result=proof.costResult=await request('GET',`${costPath}?page=1&size=100`)
    check('Exactly one original-currency cost was created at legal zero version',cost.tripNo===fixture.tripNo&&cost.costNo&&BigInt(version(cost.recordVersion))===0n&&integer(result.page.total)===1&&result.page.records.length===1&&result.page.records[0].costNo===cost.costNo)
    proof.expectedAllocations=assertSameRouteCost(result.summary,departure,shares)
    check('Exact cost command replay returns the same persisted cost and allocation',same(result.page.records[0],await request('POST',costPath,proof.costRequest))&&same(result,await request('GET',`${costPath}?page=1&size=100`)))
    const costHistory=proof.costHistory=await request('GET',`${costPath}/${encode(cost.costNo)}/history?page=1&size=100`)
    check('Exactly one immutable cost CREATE exists',integer(costHistory.total)===1&&costHistory.records.length===1&&costHistory.records[0].action==='CREATE'&&costHistory.records[0].snapshot?.cost?.costNo===cost.costNo)
    assertSameRouteCost(costHistory.records[0].snapshot.summary,departure,shares)
    check('Cost writes preserve original DEPART history, main, trip and all stock',same(history,await request('GET',`${base}/history?page=1&size=200`))&&same(departed,await request('GET',path))&&same(departedTrip,await request('GET',base))&&same(stock,await inventory('COST_REPLAY')))
    for(const [index,ref]of deliveries.entries()){
      const deliveryPath=`${ROOT}/delivery-orders/${encode(ref.deliveryNo)}`,scope=`?customerId=${encode(id(ref.customerId))}`,delivery=await request('GET',deliveryPath+scope)
      check('Only this customer actual delivery is signing',delivery.order?.dispatchNo===fixture.dispatchNo&&id(delivery.order.customerId)===id(ref.customerId)&&delivery.order.status==='DELIVERING')
      const others=await Promise.all(deliveries.filter(d=>d.deliveryNo!==ref.deliveryNo).map(d=>request('GET',`${ROOT}/delivery-orders/${encode(d.deliveryNo)}?customerId=${encode(id(d.customerId))}`)))
      const docsPath=`${deliveryPath}/documents${scope}`,docs=await request('GET',docsPath)
      const uploaded=await upload(`${deliveryPath}/documents/RECEIPT/files${scope}`,{name:`${context.marker}-${index}-TEST-receipt.txt`,type:'text/plain',content:new TextEncoder().encode(`${context.marker} TEST synthetic receipt ${ref.deliveryNo}`)})
      check('Actual receipt file has a persisted identity',uploaded?.fileId)
      const documents=(docs.categories||[]).filter(d=>d.category!=='RECEIPT').map(d=>({category:d.category,fileIds:(d.files||[]).map(f=>f.fileId)}));documents.push({category:'RECEIPT',fileIds:[id(uploaded.fileId)]})
      const body={expectedVersion:docs.version,idempotencyKey:key(`SIGN-${index}`),bolNo:docs.bolNo||null,documents}
      const signed=await request('PUT',docsPath,body),after=await request('GET',deliveryPath+scope)
      check('Real saved receipt completes this delivery',after.order.status==='DELIVERED')
      await request('PUT',docsPath,body)
      check('Signing replay preserves complete delivery evidence',same(after,await request('GET',deliveryPath+scope)))
      check('Other customer delivery is unchanged by this signature',same(others,await Promise.all(deliveries.filter(d=>d.deliveryNo!==ref.deliveryNo).map(d=>request('GET',`${ROOT}/delivery-orders/${encode(d.deliveryNo)}?customerId=${encode(id(d.customerId))}`)))))
      proof.signatures??=[];proof.signatures.push({deliveryNo:ref.deliveryNo,customerId:ref.customerId,request:body,result:signed});await context.checkpoint()
    }
    const completed=await request('GET',path)
    check('All normal signatures aggregate current native main completion',completed.status==='ACTIVE'&&completed.stage==='DELIVERED')
    check('Signing preserves all customer stock and original cost allocation',same(stock,await inventory('SIGNED'))&&same(result,await request('GET',`${costPath}?page=1&size=100`)))
    proof.status='VERIFIED';await context.checkpoint();return proof
  }catch(error){proof.status=proof.outcomeUnknown||context.createdResources.dispatchWriteBoundary?.outcomeUnknown?'OUTCOME_UNKNOWN':'FAILED';proof.error=error.message;await context.checkpoint();throw error}
}

export async function runSameRouteCost(config,{env=process.env,...dependencies}={}) {
  if(!config.execute)return {...config,scope:'TWO_FRESH_OWN_RECEIPTS_PLUS_ONE_EXTERNAL_SAME_ROUTE',cost:'USD 1.00, one OWN dispatch and one EXTERNAL booking on the same main, actual pallet-space largest remainder',sqlWrites:false,deploy:false,cleanup:'Retain samples; disable own PDA and close own sessions'}
  const files=['scripts/fleet-same-route-cost-test-env.mjs','scripts/admin-test-env-modules/fleet-cross-customer-fixture.mjs','scripts/admin-test-env-modules/fleet-external-receipt-acceptance.mjs','scripts/admin-test-env-modules/fleet-external-dispatch-acceptance.mjs','scripts/admin-test-env-modules/fleet-trip-cost-acceptance.mjs'],sources=files.map(path=>({path,sha256:createHash('sha256').update(fs.readFileSync(resolve(REPO,path))).digest('hex')}))
  const factory=dependencies.contextFactory|| (options=>new AcceptanceRun(options))
  let runOutput
  return runCrossCustomer(config,{...dependencies,env,verificationScope:'SAME_ROUTE_COST',contextFactory:options=>{
    runOutput=options.output
    const context=factory(options),prior=context.checkpoint?.bind(context)
    context.checkpoint=async()=>{
      await prior?.()
      const path=resolve(options.output,'same-route-progress.json'),temp=`${path}.tmp`
      fs.writeFileSync(temp,JSON.stringify(redactEvidence({marker:context.marker,createdResources:context.createdResources}),null,2)+'\n');fs.renameSync(temp,path)
    }
    return context
  },verify:async(context,fixture,options)=>{
    fs.writeFileSync(resolve(runOutput,'same-route-source.json'),JSON.stringify({scope:'SAME_ROUTE_COST_WITH_TWO_OWN_AND_ONE_EXTERNAL',sources},null,2),{flag:'wx'})
    return verifySameRouteCost(context,fixture,options)
  }})
}
if(process.argv[1]&&import.meta.url===pathToFileURL(resolve(process.argv[1])).href){try{const config=parseCrossCustomerArguments(process.argv.slice(2)),result=await runSameRouteCost(config);console.log(JSON.stringify(config.execute?{success:result.success,error:result.error,summary:result.summary,requestCount:result.requestCount,goalComplete:false}:result,null,2));if(config.execute&&!result.success)process.exitCode=1}catch(error){console.error(error.message);process.exitCode=1}}