import { baseUrl } from "@/config/env"

const isAbsoluteUrl = (path) => typeof path === "string" && /^https?:\/\//i.test(path)

const getApiBase = () => (baseUrl || "").replace(/\/+$/, "")

/**
 * 去掉 VITE_BASE_URL 多余前缀，支持重复前缀，得到相对路径，如 /profile/2026/...
 */
export const toRelativeFilePath = (path) => {
  if (typeof path !== "string" || !path) return ""
  if (isAbsoluteUrl(path)) return path

  const prefix = getApiBase()
  let p = path.startsWith("/") ? path : `/${path}`

  if (prefix) {
    const normalizedPrefix = prefix.startsWith("/") ? prefix : `/${prefix}`
    while (p === normalizedPrefix || p.startsWith(`${normalizedPrefix}/`)) {
      p = p.slice(normalizedPrefix.length) || "/"
      if (!p.startsWith("/")) p = `/${p}`
    }
  }

  return p
}

/**
 * 拼接为前端可访问路径，如 /profile/2026/06/12/xxx.pdf
 */
export const toFullFileUrl = (path) => {
  if (typeof path !== "string" || !path) return ""
  if (isAbsoluteUrl(path)) return path

  const prefix = getApiBase()
  const relative = toRelativeFilePath(path)
  if (!prefix) return relative
  return prefix + relative
}