import { computed, ref } from 'vue'
import { defineStore } from 'pinia'
import {
  createMerchantFirstLegOrder,
  getMerchantFirstLegOrder,
  getMerchantFirstLegOrders,
  getMerchantWarehouseDetail,
  getMerchantWarehouses,
  submitMerchantFirstLegOrder,
  updateMerchantFirstLegOrder,
  type ApiFirstLegStatus,
  type FirstLegOrderPartyPayload,
  type FirstLegOrderSaveRequest,
  type MerchantFirstLegOrder,
  type MerchantFirstLegOrderDetail,
  type MerchantWarehouse,
} from '@/modules/first-leg/api/firstLeg'
import type { MerchantTenantStatus } from '@/modules/tenant-management/public'
import type { PlatformReceivingWarehouse, PlatformReceivingWarehouseSnapshot } from '@chongchong/shared'
import type { FirstLegPartySnapshot } from '@/modules/first-leg/data/firstLegParties'
import type { FirstLegOrder, FirstLegOrderDraft, FirstLegOrderTimelineItem } from '@/modules/first-leg/types/firstLegOrder'
import { canClientEditFirstLegOrder } from '@/modules/first-leg/utils/firstLegOrder'

const countryCodes: Readonly<Record<string, string>> = {
  中国: 'CN', 美国: 'US', 德国: 'DE', 英国: 'GB', 加拿大: 'CA', 日本: 'JP', 澳大利亚: 'AU',
}

function clientStatus(status: ApiFirstLegStatus): FirstLegOrder['status'] {
  if (status === 'SUBMITTED') return 'PENDING_REVIEW'
  // 后端联调任务曾出现 REJECTED，但一期已确认订单不设驳回状态；兼容旧数据时仍按待审核展示。
  if (status === 'REJECTED') return 'PENDING_REVIEW'
  if (status === 'APPROVED' || status === 'ACCEPTED') return 'ACCEPTED'
  if (status === 'PROCESSING') return 'IN_TRANSIT'
  return status
}

function clientTransport(order: MerchantFirstLegOrder): FirstLegOrder['transportMode'] {
  if (order.transportMode === 'SEA') return order.containerMode === 'FULL_CONTAINER' ? 'FCL' : 'LCL'
  if (order.transportMode === 'AIR') return 'AIR'
  return 'ROAD'
}

function apiTransport(draft: FirstLegOrderDraft): FirstLegOrderSaveRequest['transportMode'] {
  if (draft.transportMode === 'AIR') return 'AIR'
  if (draft.transportMode === 'ROAD') return 'TRUCK'
  return 'SEA'
}

function partyPayload(snapshot: FirstLegPartySnapshot): FirstLegOrderPartyPayload {
  return {
    companyName: snapshot.name,
    contactName: snapshot.contactName,
    phone: snapshot.phone,
    email: snapshot.email || undefined,
    countryCode: countryCodes[snapshot.countryRegion] ?? snapshot.countryRegion.toUpperCase().slice(0, 2),
    province: snapshot.province || undefined,
    city: snapshot.city,
    addressLine: snapshot.address,
    postalCode: snapshot.postalCode || undefined,
  }
}

function savePayload(draft: FirstLegOrderDraft, warehouse: PlatformReceivingWarehouse, customerName: string): FirstLegOrderSaveRequest {
  if (!draft.shipperPartySnapshot || !draft.consigneePartySnapshot) throw new Error('请完整填写收发货信息')
  return {
    // 后端把 customerId 作为订单主往来单位校验并以服务端名称覆盖 customerName；
    // 当前商户下单以所选发货单位作为主往来单位，收发货详情仍分别保存订单快照。
    customerId: draft.shipperPartyId,
    customerName,
    transportMode: apiTransport(draft),
    tradeTerm: draft.tradeTerm || undefined,
    destinationCountryCode: draft.destinationCountryCode.trim().toUpperCase(),
    destinationWarehouseName: draft.destinationWarehouseName,
    expectedShipDate: draft.expectedDepartureDate || undefined,
    customerRemark: draft.customerRemark || undefined,
    sender: partyPayload(draft.shipperPartySnapshot),
    receiver: partyPayload(draft.consigneePartySnapshot),
    cargoes: draft.items.map((item) => ({
      cargoName: item.cargoNameCn,
      cargoNameEn: item.cargoNameEn || undefined,
      hsCode: item.hsCode || undefined,
      packageType: item.packageType,
      packageCount: item.packageCount,
      grossWeightKg: item.grossWeightKg,
      volumeCbm: item.volumeCbm,
      declaredValue: item.declaredValue || undefined,
      currency: item.currency || undefined,
      dangerousGoods: item.dangerousGoods,
      cargoRemark: item.remark || undefined,
      skuNo: item.sku || undefined,
      upcNo: item.upc || undefined,
      totalQuantity: item.pieces,
    })),
    pickupMethod: draft.pickupMethod,
    receivingWarehouseId: warehouse.id,
    receivingWarehouseName: warehouse.name,
    channelCode: draft.channelCode,
    channelName: draft.channelName,
    taxMode: draft.taxMode,
    containerMode: draft.transportMode === 'FCL' ? 'FULL_CONTAINER' : draft.transportMode === 'LCL' ? 'LCL' : undefined,
    customsInspection: draft.customsInspection,
    destinationType: draft.destinationType,
    amazonWarehouseCode: draft.amazonWarehouseCode || undefined,
    shipmentId: draft.shipmentId || undefined,
    referenceId: draft.referenceNo || undefined,
  }
}

function warehouseSnapshot(warehouse?: PlatformReceivingWarehouse): PlatformReceivingWarehouseSnapshot | null {
  return warehouse ? { id: warehouse.id, code: warehouse.code, name: warehouse.name, province: warehouse.province, city: warehouse.city, address: warehouse.address } : null
}

function orderWarehouseSnapshot(order: MerchantFirstLegOrder, warehouse?: PlatformReceivingWarehouse): PlatformReceivingWarehouseSnapshot | null {
  if (order.receivingWarehouseAddress) {
    return {
      id: String(order.receivingWarehouseId),
      code: warehouse?.code ?? '',
      name: order.receivingWarehouseName,
      province: warehouse?.province ?? '',
      city: warehouse?.city ?? '',
      address: order.receivingWarehouseAddress,
    }
  }
  return warehouseSnapshot(warehouse)
}

function partySnapshot(detail: MerchantFirstLegOrderDetail, type: 'SENDER' | 'RECEIVER'): FirstLegPartySnapshot | null {
  const party = detail.parties.find((item) => item.partyType === type)
  if (!party) return null
  return {
    id: String(party.id), code: type, name: party.companyName, role: type === 'SENDER' ? 'SHIPPER' : 'CONSIGNEE',
    contactName: party.contactName, phone: party.phone, email: party.email ?? '', countryRegion: party.countryCode,
    province: party.province ?? '', city: party.city, postalCode: party.postalCode ?? '', address: party.addressLine,
  }
}

function timeline(detail: MerchantFirstLegOrderDetail): FirstLegOrderTimelineItem[] {
  return detail.statusHistory.map((item) => ({
    id: String(item.id),
    event: item.toStatus === 'SUBMITTED' || item.toStatus === 'REJECTED' ? 'SUBMITTED' : item.toStatus === 'CANCELLED' ? 'CANCELLED' : item.toStatus === 'COMPLETED' ? 'COMPLETED' : item.toStatus === 'ACCEPTED' || item.toStatus === 'APPROVED' ? 'ACCEPTED' : 'IN_TRANSIT',
    title: item.toStatus === 'REJECTED' ? '平台要求补充订单信息' : item.action || `状态更新为 ${item.toStatus}`,
    description: item.reason ?? '',
    operatorName: item.operatorName ?? '',
    occurredAt: item.occurredAt,
  }))
}

function mapOrder(order: MerchantFirstLegOrder, warehouses: PlatformReceivingWarehouse[], detail?: MerchantFirstLegOrderDetail): FirstLegOrder {
  const warehouse = warehouses.find((item) => item.id === String(order.receivingWarehouseId))
  const shipper = detail ? partySnapshot(detail, 'SENDER') : null
  const consignee = detail ? partySnapshot(detail, 'RECEIVER') : null
  return {
    id: String(order.id), orderNo: order.orderNo, referenceNo: order.referenceId ?? '', transportMode: clientTransport(order),
    businessType: 'EXPORT', origin: shipper?.city ?? '', destination: order.destinationWarehouseName || order.destinationCountryCode,
    receivingWarehouseId: String(order.receivingWarehouseId), receivingWarehouseName: order.receivingWarehouseName,
    receivingWarehouseSnapshot: orderWarehouseSnapshot(order, warehouse), expectedDepartureDate: order.expectedShipDate ?? '', etd: '', eta: '',
    shipperPartyId: shipper?.id ?? '', shipperPartySnapshot: shipper, shipper: shipper?.name ?? '',
    consigneePartyId: consignee?.id ?? '', consigneePartySnapshot: consignee, consignee: consignee?.name ?? '',
    expressCompanyName: order.expressCompany ?? '', trackingNumber: order.expressTrackingNo ?? '', priority: 'NORMAL', customerRemark: order.customerRemark ?? '', operatorName: '',
    status: clientStatus(order.status), version: order.version ?? 0,
    items: (detail?.cargoes ?? []).map((item) => ({
      id: String(item.id), sku: item.skuNo ?? '', upc: item.upcNo ?? '', cargoNameCn: item.cargoName, cargoNameEn: item.cargoNameEn ?? '',
      pieces: item.totalQuantity ?? item.packageCount, packageCount: item.packageCount, grossWeightKg: item.grossWeightKg,
      volumeCbm: item.volumeCbm, containerType: '', containerCount: 0, remark: item.cargoRemark ?? '',
      packageType: item.packageType, hsCode: item.hsCode ?? '', declaredValue: item.declaredValue ?? 0,
      currency: item.currency ?? 'USD', dangerousGoods: item.dangerousGoods ?? false,
    })),
    timeline: detail ? timeline(detail) : [], createdAt: order.createdAt, updatedAt: order.updatedAt,
    tradeTerm: order.tradeTerm ?? '', destinationCountryCode: order.destinationCountryCode,
    destinationWarehouseName: order.destinationWarehouseName, pickupMethod: order.pickupMethod, channelCode: order.channelCode,
    channelName: order.channelName, taxMode: order.taxMode, customsInspection: order.customsInspection,
    destinationType: order.destinationType, amazonWarehouseCode: order.amazonWarehouseCode ?? '', shipmentId: order.shipmentId ?? '',
  }
}

function mapWarehouse(item: MerchantWarehouse): PlatformReceivingWarehouse {
  return {
    id: String(item.id), code: item.warehouseCode, name: item.warehouseName, province: '',
    city: '', address: '', contactName: item.contactName ?? '', contactPhone: item.contactPhone ?? '',
    businessHours: '', status: item.status, remark: item.remark ?? '', updatedAt: item.updatedAt ?? '',
  }
}

export const useFirstLegOrdersStore = defineStore('client-first-leg-orders', () => {
  const orders = ref<FirstLegOrder[]>([])
  const warehouses = ref<PlatformReceivingWarehouse[]>([])
  const loading = ref(false)
  const loadedFromApi = ref(false)
  const loadError = ref('')
  const activeCount = computed(() => orders.value.filter((item) => ['PENDING_REVIEW', 'ACCEPTED', 'BOOKED', 'IN_TRANSIT'].includes(item.status)).length)
  const pendingCount = computed(() => orders.value.filter((item) => item.status === 'PENDING_REVIEW').length)

  function getById(id: string) { return orders.value.find((item) => item.id === id) }

  async function load() {
    loading.value = true
    loadedFromApi.value = true
    loadError.value = ''
    orders.value = []
    warehouses.value = []
    try {
      const [orderPage, warehousePage] = await Promise.all([getMerchantFirstLegOrders(), getMerchantWarehouses()])
      warehouses.value = warehousePage.records.filter((item) => item.status === 'ACTIVE').map(mapWarehouse)
      orders.value = orderPage.records.map((item) => mapOrder(item, warehouses.value))
    } catch (error) {
      loadError.value = error instanceof Error ? error.message : '订单与仓库数据加载失败'
      throw error
    } finally { loading.value = false }
  }

  async function loadDetail(id: string) {
    const detail = await getMerchantFirstLegOrder(id)
    const mapped = mapOrder(detail.order, warehouses.value, detail)
    const index = orders.value.findIndex((item) => item.id === id)
    if (index >= 0) orders.value[index] = mapped
    else orders.value.unshift(mapped)
    return mapped
  }

  async function loadWarehouseDetail(id: string) {
    const detail = await getMerchantWarehouseDetail(id)
    const mapped = mapWarehouse(detail.warehouse)
    const address = detail.addresses[0]
    const receivingCapability = detail.capabilities.find((item) => item.enabled && item.cutoffTime)
    if (address) {
      mapped.province = address.stateProvince ?? ''
      mapped.city = address.city ?? ''
      mapped.address = [address.district, address.addressLine1, address.addressLine2].filter(Boolean).join(' ')
    }
    if (receivingCapability?.cutoffTime) mapped.businessHours = `每日 ${receivingCapability.cutoffTime.slice(0, 5)} 前`
    const index = warehouses.value.findIndex((item) => item.id === id)
    if (index >= 0) warehouses.value[index] = mapped
    return mapped
  }

  async function saveDraft(draft: FirstLegOrderDraft, customerName: string, id?: string) {
    const warehouse = warehouses.value.find((item) => item.id === draft.receivingWarehouseId)
    if (!warehouse) throw new Error('所选收货仓当前不可用')
    if (id) {
      const order = getById(id)
      if (!order || !canClientEditFirstLegOrder(order.status)) throw new Error('当前订单状态不允许编辑')
      await updateMerchantFirstLegOrder(id, savePayload(draft, warehouse, customerName))
      return loadDetail(id)
    }
    const createdId = await createMerchantFirstLegOrder(savePayload(draft, warehouse, customerName))
    return loadDetail(String(createdId))
  }

  async function submit(draft: FirstLegOrderDraft, customerName: string, id?: string, companyAuditStatus: MerchantTenantStatus = 'ACTIVE') {
    if (companyAuditStatus !== 'ACTIVE') throw new Error('企业资料尚未审核通过，请先完善企业资料并等待平台审核')
    const order = await saveDraft(draft, customerName, id)
    await submitMerchantFirstLegOrder(order.id)
    return loadDetail(order.id)
  }

  return { orders, warehouses, loading, loadedFromApi, loadError, activeCount, pendingCount, getById, load, loadDetail, loadWarehouseDetail, saveDraft, submit }
})