import {
  FIRST_LEG_ORDER_STATUSES,
  FIRST_LEG_TRANSPORT_MODES,
  type FirstLegOrderStatus,
  type FirstLegTransportMode,
} from '@chongchong/shared'
import type { FirstLegCargoItem, FirstLegOrderDraft } from '../types/firstLegOrder.ts'

const statusLabels = new Map<FirstLegOrderStatus, string>(
  FIRST_LEG_ORDER_STATUSES.map((item) => [item.code, item.label]),
)

const transportModeLabels = new Map<FirstLegTransportMode, string>(
  FIRST_LEG_TRANSPORT_MODES.map((item) => [item.code, item.label]),
)

export function getFirstLegStatusLabel(status: FirstLegOrderStatus) {
  return statusLabels.get(status) ?? '未知状态'
}

export function getFirstLegTransportModeLabel(mode: FirstLegTransportMode | null) {
  if (!mode) return '运输方式待更新'
  return transportModeLabels.get(mode) ?? mode
}

export function getFirstLegStatusTone(status: FirstLegOrderStatus): 'success' | 'warning' | 'info' | 'primary' {
  if (status === 'DELIVERED' || status === 'LOADED' || status === 'COMPLETED') return 'success'
  if (status === 'DRAFT') return 'info'
  if (status === 'PENDING_REVIEW') return 'warning'
  if (['WAIT_MEASURE', 'WAIT_PALLETIZE', 'WAIT_SPLIT', 'LOADING'].includes(status)) return 'primary'
  return 'info'
}

export function canClientEditFirstLegOrder(status: FirstLegOrderStatus) {
  return status === 'DRAFT'
}

export function canClientCancelFirstLegOrder(status: FirstLegOrderStatus) {
  return status === 'DRAFT' || status === 'PENDING_REVIEW'
}

export const FIRST_LEG_PROGRESS_STAGES = FIRST_LEG_ORDER_STATUSES.filter(
  (item): item is (typeof FIRST_LEG_ORDER_STATUSES)[number] & { code: Exclude<FirstLegOrderStatus, 'DRAFT'> } => item.code !== 'DRAFT',
)

export function getFirstLegProgressIndex(status: FirstLegOrderStatus) {
  if (status === 'DRAFT') return -1
  return FIRST_LEG_PROGRESS_STAGES.findIndex((item) => item.code === status)
}

export function createEmptyCargoItem(id = `cargo-${Date.now()}`): FirstLegCargoItem {
  return {
    id,
    sku: '',
    upc: '',
    cargoNameCn: '',
    cargoNameEn: '',
    productImageFileId: '',
    productImageName: '',
    productImagePreviewUrl: '',
    productImageUploading: false,
    productImageError: '',
    customsHsCode: '',
    lengthCm: 0,
    widthCm: 0,
    heightCm: 0,
    unitsPerPackage: 1,
    pieces: 1,
    packageCount: 1,
    packingGroupNo: '',
    grossWeightKg: 0,
    volumeCbm: 0,
    netWeightKg: 0,
    unitDeclaredValue: 0,
    material: '',
    usage: '',
    model: '',
    brand: '',
    productLengthCm: 0,
    productWidthCm: 0,
    productHeightCm: 0,
    shipmentId: '',
    referenceId: '',
    remark: '',
    packageType: 'CARTON',
    hsCode: '',
    declaredValue: 0,
    currency: 'USD',
    dangerousGoods: false,
    woodenProduct: false,
  }
}

export function validateFirstLegOrderDraft(draft: FirstLegOrderDraft) {
  const errors: string[] = []

  if (!draft.destination.trim()) errors.push('请填写目的地')
  if (!/^[A-Za-z]{2}$/.test(draft.destinationCountryCode.trim())) errors.push('请输入两位英文字母的目的国代码')
  if (!draft.destinationWarehouseName.trim()) errors.push('请填写目的仓名称')
  if (draft.destinationType !== 'PRIVATE' && !draft.destinationWarehouseId) errors.push('请选择平台维护的目的仓')
  if (draft.destinationType === 'PRIVATE' && draft.destinationWarehouseId) errors.push('私人地址不能引用平台公共仓库')
  if (!draft.channelCode.trim() || !draft.channelName.trim()) errors.push('请填写渠道编码和渠道名称')
  if (!['TAX_INCLUDED', 'TAX_EXCLUDED'].includes(draft.pricingTaxMode)) errors.push('请选择报价包税方式')
  if (!draft.receivingWarehouseId) errors.push('请选择平台收货仓')
  if (draft.pickupMethod === 'PICKUP') {
    if (!draft.senderAddressId) errors.push('请选择已保存的提货地址')
    if (!draft.shipperPartySnapshot?.contactName.trim()) errors.push('请填写提货联系人')
    if (!draft.shipperPartySnapshot?.phone.trim()) errors.push('请填写提货联系电话')
    if (!draft.shipperPartySnapshot?.city.trim()) errors.push('请填写提货城市')
    if (!draft.shipperPartySnapshot?.address.trim()) errors.push('请填写提货地址')
  }
  if (draft.destinationType === 'PRIVATE') {
    if (!draft.privateDestinationAddressId) errors.push('请选择已保存的私人仓地址')
    if (!draft.consigneePartySnapshot?.name.trim()) errors.push('请填写私人地址名称')
    if (!draft.consigneePartySnapshot?.contactName.trim()) errors.push('请填写收件人姓名')
    if (!draft.consigneePartySnapshot?.phone.trim()) errors.push('请填写收件人电话')
    if (!draft.consigneePartySnapshot?.city.trim()) errors.push('请填写收件城市')
    if (!draft.consigneePartySnapshot?.address.trim()) errors.push('请填写收件详细地址')
  }
  if (draft.items.length === 0) errors.push('请至少添加一条货物明细')

  if (draft.destinationType === 'FBA') {
    if (!draft.amazonWarehouseCode.trim()) errors.push('FBA 订单请填写 Amazon 仓库编码')
  }

  draft.items.forEach((item, index) => {
    const line = `第 ${index + 1} 条货物`
    if (!item.cargoNameCn.trim()) errors.push(`${line}缺少中文品名`)
    if (!item.packageType.trim()) errors.push(`${line}缺少包装类型`)
    if ((draft.destinationType === 'FBA' || draft.fulfillmentType === 'ONE_CLICK_DROPSHIP') && !item.sku.trim()) errors.push(`${line}缺少客户 SKU`)
    if (draft.destinationType === 'FBA' && !item.shipmentId.trim()) errors.push(`${line}缺少货件编号`)
    if (draft.destinationType === 'FBA' && !item.referenceId.trim()) errors.push(`${line}缺少跟踪编号`)
    if (!Number.isInteger(item.pieces) || item.pieces <= 0) errors.push(`${line}件数必须为正整数`)
    if (!Number.isInteger(item.packageCount) || item.packageCount <= 0) errors.push(`${line}箱数必须为正整数`)
    if (!Number.isInteger(item.unitsPerPackage) || item.unitsPerPackage <= 0) errors.push(`${line}每箱数量必须为正整数`)
    if (Number.isInteger(item.unitsPerPackage) && item.unitsPerPackage > 0
      && Number.isInteger(item.packageCount) && item.packageCount > 0
      && Number.isInteger(item.pieces) && item.pieces > 0
      && item.pieces !== item.unitsPerPackage * item.packageCount) {
      errors.push(`${line}总数量应等于每箱数量 × 箱数（${item.unitsPerPackage * item.packageCount}）`)
    }
    if (item.grossWeightKg <= 0) errors.push(`${line}毛重必须大于 0`)
    if (item.volumeCbm <= 0) errors.push(`${line}体积必须大于 0`)
    if (item.woodenProduct && draft.customsInspection !== true) errors.push(`${line}为木制品，“是否商检”必须选择“是”`)
  })

  if (draft.fulfillmentType === 'ONE_CLICK_DROPSHIP') {
    const groups = new Map<string, FirstLegCargoItem>()
    draft.items.forEach((item) => {
      const group = item.packingGroupNo.trim()
      if (!group) return
      const first = groups.get(group)
      if (!first) groups.set(group, item)
      else if (first.packageCount !== item.packageCount || first.packageType !== item.packageType
        || first.lengthCm !== item.lengthCm || first.widthCm !== item.widthCm || first.heightCm !== item.heightCm
        || first.grossWeightKg !== item.grossWeightKg || first.netWeightKg !== item.netWeightKg
        || first.volumeCbm !== item.volumeCbm) {
        errors.push(`同箱 SKU 的箱数、包装类型、箱规、重量和体积必须一致`)
      }
    })
  }

  return errors
}

export function summarizeFirstLegCargo(items: FirstLegCargoItem[]) {
  const countedGroups = new Set<string>()
  return items.reduce(
    (summary, item) => {
      const group = item.packingGroupNo.trim()
      const alreadyCounted = Boolean(group && countedGroups.has(group))
      const packageCount = alreadyCounted ? 0 : item.packageCount
      if (group) countedGroups.add(group)
      return ({
      pieces: summary.pieces + item.pieces,
      packageCount: summary.packageCount + packageCount,
      grossWeightKg: summary.grossWeightKg + (alreadyCounted ? 0 : item.grossWeightKg),
      volumeCbm: summary.volumeCbm + (alreadyCounted ? 0 : item.volumeCbm),
      })
    },
    { pieces: 0, packageCount: 0, grossWeightKg: 0, volumeCbm: 0 },
  )
}