import dayjs from 'dayjs'

type Row = Record<string, unknown>

export function pickField<T = unknown>(row: Row, ...keys: string[]): T | undefined {
  for (const key of keys) {
    const value = row[key]
    if (value !== undefined && value !== null && value !== '') {
      return value as T
    }
  }
  return undefined
}

export function formatDateTime(value: unknown): string {
  if (!value) return '-'
  const formatted = dayjs(String(value))
  return formatted.isValid() ? formatted.format('YYYY-MM-DD HH:mm') : String(value)
}

export function formatDimensions(row: Row): string {
  const length = pickField<number | string>(row, 'lengthCm', 'LengthCm')
  const width = pickField<number | string>(row, 'widthCm', 'WidthCm')
  const height = pickField<number | string>(row, 'heightCm', 'HeightCm')
  if (length == null && width == null && height == null) return '-'
  return `${length ?? '-'}×${width ?? '-'}×${height ?? '-'}`
}

export function buildWarehouseNameMap(
  options: Array<{ label: string; value: number }>,
): Map<number, string> {
  return new Map(options.map((item) => [item.value, item.label]))
}

export function resolveWarehouseLabel(
  warehouseId: number | undefined,
  map: Map<number, string>,
): string {
  if (!warehouseId) return '-'
  return map.get(warehouseId) || `#${warehouseId}`
}

/** 商品信息：首个品名；多项时后缀 +N（其余条数） */
export function summarizeParcelItems(items: unknown): string {
  const list = Array.isArray(items) ? items : []
  if (!list.length) return '-'
  const first = list[0] as Row
  const name = pickField<string>(first, 'productName', 'ProductName') || '-'
  if (list.length === 1) return name
  return `${name} +${list.length - 1}`
}

/** 属性：只取第一条明细的属性（不加 +N） */
export function summarizeParcelAttributes(items: unknown): string {
  const list = Array.isArray(items) ? items : []
  if (!list.length) return '-'
  const first = list[0] as Row
  const text = String(pickField(first, 'attributeText', 'AttributeText') ?? '').trim()
  return text || '-'
}

/** 数量：合计件数 */
export function summarizeParcelQuantity(items: unknown): string {
  const list = Array.isArray(items) ? items : []
  if (!list.length) return '-'
  const total = list.reduce((sum, item) => {
    const q = Number(pickField(item as Row, 'quantity', 'Quantity') ?? 0)
    return sum + (q > 0 ? q : 1)
  }, 0)
  return String(total)
}

export type ParcelItemLine = {
  productName: string
  attributeText: string
  imageUrl: string
  quantity: number
  availableQty: number
  frozenQty: number
  remark: string
}

/** 取首条有图的商品图 URL */
export function pickFirstParcelItemImageUrl(items: unknown): string {
  const list = Array.isArray(items) ? items : []
  for (const item of list) {
    const url = String(
      pickField(item as Row, 'imageUrl', 'ImageUrl', 'image', 'Image') ?? '',
    ).trim()
    if (url) return url
  }
  return ''
}

/** 规范化包裹明细行（列表浮层 / 编辑共用） */
export function normalizeParcelItemLines(items: unknown): ParcelItemLine[] {
  const list = Array.isArray(items) ? items : []
  return list.map((item) => {
    const row = item as Row
    const q = Number(pickField(row, 'quantity', 'Quantity') ?? 1)
    const qty = q > 0 ? q : 1
    const frozen = Math.max(0, Number(pickField(row, 'frozenQty', 'FrozenQty') ?? 0))
    const availableRaw = pickField(row, 'availableQty', 'AvailableQty')
    const available =
      availableRaw != null && availableRaw !== ''
        ? Number(availableRaw)
        : Math.max(0, qty - frozen)
    return {
      productName: String(pickField(row, 'productName', 'ProductName') ?? '').trim() || '-',
      attributeText: String(pickField(row, 'attributeText', 'AttributeText') ?? '').trim() || '-',
      imageUrl: String(pickField(row, 'imageUrl', 'ImageUrl', 'image', 'Image') ?? '').trim(),
      quantity: qty,
      availableQty: Number.isFinite(available) ? available : 0,
      frozenQty: frozen,
      remark: String(pickField(row, 'remark', 'Remark') ?? '').trim() || '-',
    }
  })
}

/** 悬停提示：品名 ×数量，最多 maxLines 行 */
export function summarizeParcelItemsTooltip(items: unknown, maxLines = 5): string {
  const lines = normalizeParcelItemLines(items)
  if (!lines.length) return ''
  const shown = lines.slice(0, maxLines).map((l) => `${l.productName} ×${l.quantity}`)
  if (lines.length > maxLines) {
    shown.push(`共 ${lines.length} 项`)
  }
  return shown.join('\n')
}

export function formatMoney(amount: unknown, currency?: string | null): string {
  if (amount == null || amount === '') return '-'
  const code = currency?.trim()
  return code ? `${amount} ${code}` : String(amount)
}

export function normalizeListRow(row: Row): Row {
  const normalized: Row = { ...row }
  Object.entries(row).forEach(([key, value]) => {
    if (!key) return
    const camel = key.charAt(0).toLowerCase() + key.slice(1)
    if (normalized[camel] === undefined) normalized[camel] = value
    const pascal = key.charAt(0).toUpperCase() + key.slice(1)
    if (normalized[pascal] === undefined) normalized[pascal] = value
  })
  return normalized
}

/** SKU 英文名称（兼容多种 API 字段名） */
export function pickSkuEnglishName(row: Row): string {
  return String(
    pickField(row, 'skuNameEn', 'SkuNameEn', 'enName', 'EnName', 'englishName', 'EnglishName') ?? '',
  ).trim()
}

function looksLikeChinese(text: string) {
  return /[\u4e00-\u9fff]/.test(text)
}

/** 申报图入库：去掉签名参数，避免 SkuImage VARCHAR 超长 */
export function normalizeSkuImageForStorage(value?: string | null): string {
  const raw = String(value ?? '').trim()
  if (!raw) return ''
  if (raw.startsWith('data:') || raw.startsWith('blob:')) return raw
  try {
    if (/^https?:\/\//i.test(raw)) {
      const url = new URL(raw)
      // 托管资源只保留路径 key；外链去掉 query/hash 再存
      const path = decodeURIComponent(url.pathname || '').replace(/^\/+/, '')
      if (path && /(?:uploads\/|sku\/|parcel\/)/i.test(path)) {
        return path
      }
      return `${url.origin}${url.pathname}`
    }
  } catch {
    // ignore
  }
  const q = raw.indexOf('?')
  const h = raw.indexOf('#')
  let end = raw.length
  if (q >= 0) end = Math.min(end, q)
  if (h >= 0) end = Math.min(end, h)
  return raw.slice(0, end)
}

/** 仓库 SKU → 我要下单申报行字段 */
export function mapWarehouseSkuToDeclarationFields(raw: Row) {
  const row = normalizeListRow(raw)
  const skuCode = String(pickField(row, 'skuCode', 'SkuCode') ?? '')
  const skuName = String(pickField(row, 'skuName', 'SkuName') ?? '')
  const skuNameEn = pickSkuEnglishName(row)
  const weightG = Number(pickField(row, 'weightG', 'WeightG') ?? 0)
  const unitPrice = pickField(row, 'unitPrice', 'UnitPrice')
  const exHsCode = String(pickField(row, 'exHsCode', 'ExHsCode') ?? '')
  const imHsCode = String(pickField(row, 'imHsCode', 'ImHsCode') ?? '')
  const image = normalizeSkuImageForStorage(
    String(pickField(row, 'skuImageUrl', 'SkuImageUrl') ?? ''),
  )
  const remark = String(pickField(row, 'remark', 'Remark') ?? '')

  const formatNum = (value: number) => {
    if (Number.isInteger(value)) return String(value)
    return value.toFixed(4).replace(/(\.\d*?)0+$/, '$1').replace(/\.$/, '')
  }

  const unitWeight = weightG > 0 ? formatNum(weightG / 1000) : ''
  const enName = skuNameEn || (skuName && !looksLikeChinese(skuName) ? skuName : '')
  const priceText = unitPrice != null && unitPrice !== ''
    ? formatNum(Number(unitPrice))
    : ''

  return {
    sku: skuCode,
    cnName: skuName,
    enName,
    unitPrice: priceText,
    unitWeight,
    quantity: '1',
    exHsCode,
    imHsCode,
    skuImage: image,
    comment: remark,
  }
}

/** 选择 SKU 弹窗回传：合并原始行与已解析字段，避免英文名称丢失 */
export function buildWarehouseSkuSelectPayload(raw: Row, mapped?: Row): Row {
  const normalized = normalizeListRow(raw)
  const merged = mapped ? normalizeListRow(mapped) : {}
  return {
    ...normalized,
    ...raw,
    skuCode: merged.skuCode ?? normalized.skuCode ?? raw.skuCode ?? raw.SkuCode,
    skuName: merged.skuName ?? normalized.skuName ?? raw.skuName ?? raw.SkuName,
    skuNameEn: pickSkuEnglishName(merged) || pickSkuEnglishName(normalized) || pickSkuEnglishName(raw),
    unitPrice: pickField(merged, 'unitPrice', 'UnitPrice')
      ?? pickField(normalized, 'unitPrice', 'UnitPrice')
      ?? pickField(raw, 'unitPrice', 'UnitPrice'),
    exHsCode: pickField(merged, 'exHsCode', 'ExHsCode')
      ?? pickField(normalized, 'exHsCode', 'ExHsCode')
      ?? pickField(raw, 'exHsCode', 'ExHsCode'),
    imHsCode: pickField(merged, 'imHsCode', 'ImHsCode')
      ?? pickField(normalized, 'imHsCode', 'ImHsCode')
      ?? pickField(raw, 'imHsCode', 'ImHsCode'),
    skuImageUrl: pickField(merged, 'skuImageUrl', 'SkuImageUrl')
      ?? pickField(normalized, 'skuImageUrl', 'SkuImageUrl')
      ?? pickField(raw, 'skuImageUrl', 'SkuImageUrl'),
    weightG: pickField(merged, 'weightG', 'WeightG')
      ?? pickField(normalized, 'weightG', 'WeightG')
      ?? pickField(raw, 'weightG', 'WeightG'),
    remark: pickField(merged, 'remark', 'Remark')
      ?? pickField(normalized, 'remark', 'Remark')
      ?? pickField(raw, 'remark', 'Remark'),
  }
}