/** 装货/送货客户列过滤 → 合并为服务端 stopCustomers / customerKeyword */

export function parseCustomerQueryParam(raw: unknown): string[] {
  if (raw == null || raw === '') return []
  if (Array.isArray(raw)) {
    return raw.map((value) => String(value || '').trim()).filter(Boolean)
  }
  const text = String(raw).trim()
  if (!text) return []
  if (text.startsWith('[')) {
    try {
      const parsed = JSON.parse(text)
      if (Array.isArray(parsed)) {
        return parsed.map((value) => String(value || '').trim()).filter(Boolean)
      }
    } catch {
      /* fall through */
    }
  }
  return [text]
}

/**
 * 从 params 取出 loadCustomers / deliveryCustomers，合并写入 targetKey 后删除原键。
 * @param targetKey 默认 stopCustomers；合同完善页可用 customerKeyword
 * @param asJson 为 true 时写入 JSON 数组字符串；否则写入首个关键字（兼容单字符串模糊匹配）
 */
export function applyMergedCustomerQueryParams(
  params: Record<string, any>,
  options?: { targetKey?: string; asJson?: boolean }
): void {
  const targetKey = options?.targetKey || 'stopCustomers'
  const asJson = options?.asJson !== false
  const merged = [
    ...parseCustomerQueryParam(params.loadCustomers),
    ...parseCustomerQueryParam(params.deliveryCustomers)
  ]
  delete params.loadCustomers
  delete params.deliveryCustomers
  if (!merged.length) return
  params[targetKey] = asJson ? JSON.stringify(merged) : merged[0]
}

export function selectedKeywordsFromFilter(
  filterState: { selected?: string[] } | null | undefined
): string[] | null {
  const selected = (filterState?.selected || [])
    .map((value) => String(value || '').trim())
    .filter(Boolean)
  return selected.length ? selected : null
}