import type { FormRules } from 'element-plus'

export type TransportDemandKind = 'truck' | 'looseboard'
export interface TransportDemandForm {
  deliveryMode: 'DELIVERY_TO_WAREHOUSE' | 'WAREHOUSE_PICKUP'
  operatingWarehouseId: string
  deliveryContactName: string
  deliveryContactPhone: string
  estimatedArrivalAt: string
  trackingNo: string
  destinationType: 'FBA' | 'PRIVATE'
  destinationPostalCode: string
  vehicleType: '' | 'PALLET_15' | 'PALLET_30'
  origin: string
  destination: string
  originAddress: string
  destinationAddress: string
  originContactName: string
  originContactPhone: string
  destinationContactName: string
  destinationContactPhone: string
  productName: string
  estimatedPalletCount: number
  packageCount: number
  totalWeightKg: number
  totalVolumeCbm: number
  budgetAmount: number | undefined
  currency: 'USD' | 'CNY'
  pickupAt: string
  deliveryAt: string
  remark: string
}

export function createTransportDemandForm(): TransportDemandForm {
  return {
    deliveryMode: 'DELIVERY_TO_WAREHOUSE', operatingWarehouseId: '', deliveryContactName: '', deliveryContactPhone: '', estimatedArrivalAt: '', trackingNo: '', destinationType: 'PRIVATE', destinationPostalCode: '',
    vehicleType: '', origin: '', destination: '', originAddress: '', destinationAddress: '',
    originContactName: '', originContactPhone: '', destinationContactName: '', destinationContactPhone: '',
    productName: '', estimatedPalletCount: 0, packageCount: 0, totalWeightKg: 0, totalVolumeCbm: 0,
    budgetAmount: undefined, currency: 'USD', pickupAt: '', deliveryAt: '', remark: '',
  }
}

const requiredText = (kind: TransportDemandKind, form: TransportDemandForm) => ({
  ...(kind === 'truck' || form.deliveryMode === 'WAREHOUSE_PICKUP' ? { origin: kind === 'truck' ? '取货地' : '起运地', originContactName: kind === 'truck' ? '取货联系人' : '起运地联系人', originContactPhone: kind === 'truck' ? '取货联系电话' : '起运地联系电话' } : {}),
  destination: kind === 'truck' ? '送达地' : '目的地',
  destinationContactName: kind === 'truck' ? '送达联系人' : '目的地联系人',
  destinationContactPhone: kind === 'truck' ? '送达联系电话' : '目的地联系电话',
} as const)

export function localMinuteInput(value: unknown) {
  return typeof value === 'string' && value ? `${value.slice(0, 16)}:00` : ''
}

export function transportDemandRules(kind: TransportDemandKind, form: TransportDemandForm): FormRules<TransportDemandForm> {
  const rules: FormRules<TransportDemandForm> = {}
  const labels = requiredText(kind, form)
  for (const [field, label] of Object.entries(labels)) {
    rules[field as keyof typeof labels] = [{ required: true, whitespace: true, message: `请输入${label}`, trigger: 'blur' }]
  }
  if (kind === 'looseboard') {
    if (form.deliveryMode === 'WAREHOUSE_PICKUP') rules.originAddress = [{ required: true, whitespace: true, message: '请输入起运详细地址', trigger: 'blur' }]
    rules.operatingWarehouseId = [{ required: true, message: '请选择收货仓库', trigger: 'change' }]
    if (form.destinationType === 'PRIVATE') {
      rules.destinationAddress = [{ required: true, whitespace: true, message: '请输入目的详细地址', trigger: 'blur' }]
      rules.destinationPostalCode = [{ required: true, whitespace: true, message: '请输入目的地邮编', trigger: 'blur' }]
    }
    if (form.deliveryMode === 'DELIVERY_TO_WAREHOUSE') {
      for (const [field, label] of [['deliveryContactName', '到仓联系人'], ['deliveryContactPhone', '到仓联系电话'], ['estimatedArrivalAt', '预计到货时间']] as const) rules[field] = [{ required: true, message: '请填写' + label, trigger: 'change' }]
    }
  }
  if (kind === 'truck') rules.vehicleType = [{ required: true, message: '请选择车辆类型', trigger: 'change' }]
  for (const [field, label] of [['packageCount', '件数'], ['estimatedPalletCount', '预计托数'], ['totalWeightKg', '总重量'], ['totalVolumeCbm', '总体积']] as const) {
    if (field === 'packageCount' && kind === 'truck') continue
    rules[field] = [{ required: true, type: 'number', min: 0, message: `${label}须为不小于 0 的数字`, trigger: 'change' }]
  }
  rules.budgetAmount = [{ required: kind === 'truck', type: 'number', min: kind === 'truck' ? 0.01 : 0, message: '请输入大于 0 的预算总价', trigger: 'change' }]
  const pickupLabel = kind === 'truck' ? '取货时间' : '取货时间', deliveryLabel = kind === 'truck' ? '送达时间' : '送货时间'
  rules.pickupAt = [{ required: true, message: `请选择${pickupLabel}`, trigger: 'change' }]
  rules.deliveryAt = [{ required: true, message: `请选择${deliveryLabel}`, trigger: 'change' }, {
    validator: (_rule, value, callback) => callback(value && form.pickupAt && localMinuteInput(value) < localMinuteInput(form.pickupAt) ? new Error(`${deliveryLabel}不能早于${pickupLabel}`) : undefined), trigger: 'change',
  }]
  return rules
}

export function transportDemandError(kind: TransportDemandKind, form: TransportDemandForm): string | undefined {
  if (kind === 'looseboard') {
    if (!form.operatingWarehouseId) return '请选择收货仓库'
    if (!['DELIVERY_TO_WAREHOUSE', 'WAREHOUSE_PICKUP'].includes(form.deliveryMode)) return '请选择送货方式'
    if (form.destinationType === 'PRIVATE' && (!form.destinationAddress.trim() || !form.destinationPostalCode.trim())) return '请填写目的详细地址和邮编'
    if (form.deliveryMode === 'DELIVERY_TO_WAREHOUSE' && (!form.deliveryContactName.trim() || !form.deliveryContactPhone.trim() || !form.estimatedArrivalAt)) return '送货到仓须填写仓库联系人和预计到货时间'
    if (form.deliveryMode === 'WAREHOUSE_PICKUP' && !form.originAddress.trim()) return '请输入起运详细地址'
    if (form.packageCount < 1) return '散板收货件数须大于 0'
  }
  if (kind === 'truck' && !['PALLET_15', 'PALLET_30'].includes(form.vehicleType)) return '请选择车辆类型'
  const labels = requiredText(kind, form)
  for (const [field, label] of Object.entries(labels)) {
    if (!String(form[field as keyof typeof labels] || '').trim()) return `请输入${label}`
  }
  const pickupLabel = kind === 'truck' ? '取货时间' : '取货时间', deliveryLabel = kind === 'truck' ? '送达时间' : '送货时间'
  for (const [field, label] of [['pickupAt', pickupLabel], ['deliveryAt', deliveryLabel]] as const) {
    if (!form[field]) return `请选择${label}`
    if (!/^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}(?::\d{2}(?:\.\d+)?)?$/.test(form[field])) return `请选择有效的${label}`
  }
  if (localMinuteInput(form.deliveryAt) < localMinuteInput(form.pickupAt)) return `${deliveryLabel}不能早于${pickupLabel}`
  for (const [field, label] of [['packageCount', '件数'], ['totalWeightKg', '总重量'], ['totalVolumeCbm', '总体积'], ...(kind === 'looseboard' ? [['estimatedPalletCount', '预计托数'] as const] : [])] as const) {
    if (!Number.isFinite(form[field]) || form[field] < 0) return `${label}须为不小于 0 的数字`
  }
  if (!Number.isInteger(form.packageCount) || kind === 'looseboard' && !Number.isInteger(form.estimatedPalletCount)) return '件数和预计托数须为整数'
  if (kind === 'truck' && (!Number.isSafeInteger(form.estimatedPalletCount) || form.estimatedPalletCount <= 0)) return '请输入大于 0 的托数'
  if (kind === 'truck' && (form.budgetAmount == null || !Number.isFinite(form.budgetAmount) || form.budgetAmount <= 0)) return '请输入大于 0 的预算总价'
  if (form.budgetAmount != null && (!Number.isFinite(form.budgetAmount) || form.budgetAmount < 0)) return '预算总价不能小于 0'
  if (!['USD', 'CNY'].includes(form.currency)) return '请选择预算币种'
  return undefined
}

function commonPayload(form: TransportDemandForm) {
  return {
    origin: form.origin.trim(), destination: form.destination.trim(),
    originAddress: form.originAddress.trim() || undefined, destinationAddress: form.destinationAddress.trim() || undefined,
    originContactName: form.originContactName.trim(), originContactPhone: form.originContactPhone.trim(),
    destinationContactName: form.destinationContactName.trim(), destinationContactPhone: form.destinationContactPhone.trim(),
    packageCount: form.packageCount, totalWeightKg: form.totalWeightKg, totalVolumeCbm: form.totalVolumeCbm,
    budgetAmount: form.budgetAmount ?? undefined, currency: form.currency,
    pickupAt: localMinuteInput(form.pickupAt), deliveryAt: localMinuteInput(form.deliveryAt), remark: form.remark.trim() || undefined,
  }
}

type CommonPayload = ReturnType<typeof commonPayload>
type TruckPayload = Omit<CommonPayload, 'packageCount'> & { palletCount: number; vehicleType: 'PALLET_15' | 'PALLET_30' }
type LooseboardPayload = CommonPayload & { deliveryMode: 'DELIVERY_TO_WAREHOUSE' | 'WAREHOUSE_PICKUP'; operatingWarehouseId: string; destinationType: 'FBA' | 'PRIVATE'; destinationPostalCode?: string; deliveryContactName?: string; deliveryContactPhone?: string; estimatedArrivalAt?: string; trackingNo?: string; productName: string | undefined; estimatedPalletCount: number }

export function buildTransportDemand(kind: 'truck', form: TransportDemandForm): TruckPayload
export function buildTransportDemand(kind: 'looseboard', form: TransportDemandForm): LooseboardPayload
export function buildTransportDemand(kind: TransportDemandKind, form: TransportDemandForm): TruckPayload | LooseboardPayload {
  const failure = transportDemandError(kind, form)
  if (failure) throw new Error(failure)
  const common = commonPayload(form)
  return kind === 'truck'
    ? { ...(({ packageCount: _packages, ...rest }) => rest)(common), palletCount: form.estimatedPalletCount, vehicleType: form.vehicleType as 'PALLET_15' | 'PALLET_30' }
    : { ...common, ...(form.deliveryMode === 'DELIVERY_TO_WAREHOUSE' ? { origin: '', originAddress: undefined, originContactName: '', originContactPhone: '' } : {}), deliveryMode: form.deliveryMode, operatingWarehouseId: form.operatingWarehouseId, deliveryContactName: form.deliveryMode === 'DELIVERY_TO_WAREHOUSE' ? form.deliveryContactName.trim() : undefined, deliveryContactPhone: form.deliveryMode === 'DELIVERY_TO_WAREHOUSE' ? form.deliveryContactPhone.trim() : undefined, estimatedArrivalAt: form.deliveryMode === 'DELIVERY_TO_WAREHOUSE' ? localMinuteInput(form.estimatedArrivalAt) : undefined, trackingNo: form.deliveryMode === 'DELIVERY_TO_WAREHOUSE' ? form.trackingNo.trim() || undefined : undefined, destinationType: form.destinationType, destinationPostalCode: form.destinationType === 'PRIVATE' ? form.destinationPostalCode.trim() : undefined, productName: form.productName.trim() || undefined, estimatedPalletCount: form.estimatedPalletCount }
}