import {
  STATIC_ASSETS_BASE_URL_DEFAULT,
  STATIC_ASSETS_BASE_URL_PRODUCTION,
  STATIC_ASSETS_BASE_URL_TEST
} from '@/config/static-assets-defaults'
import { getStaticAssetsVersion, withOssVersion } from '@/utils/ossCache'

function normalizeBase(u) {
  const s = (u || '').trim() || STATIC_ASSETS_BASE_URL_DEFAULT
  return s.endsWith('/') ? s : `${s}/`
}

function isPlaceholderBaseUrl(value) {
  const text = String(value || '').trim().toLowerCase()
  if (!text) return true
  return text.includes('replace_') || text.includes('replace_prod_static_host')
}

function resolveBase() {
  // 优先当前 APP_ENV；占位则回退空串走本地 /static/
  const remote = STATIC_ASSETS_BASE_URL_DEFAULT || STATIC_ASSETS_BASE_URL_PRODUCTION || STATIC_ASSETS_BASE_URL_TEST
  if (isPlaceholderBaseUrl(remote)) return ''
  return normalizeBase(remote)
}

function localStaticUrl(relativePath) {
  const p = String(relativePath || '').replace(/^\/+/, '')
  return `/static/${p}`
}

export function getStaticAssetsBaseUrl() {
  return resolveBase()
}

/**
 * 拼接静态资源完整 URL。
 * 未配置远程 CDN 时，回退到项目内 `/static/` 目录（本地开发/框架阶段默认行为）。
 */
export function staticAssetUrl(relativePath) {
  const p = String(relativePath || '').replace(/^\/+/, '')
  const base = getStaticAssetsBaseUrl()
  if (!base) {
    return localStaticUrl(p)
  }
  const seg = p.split('/').filter(Boolean).map((s) => encodeURIComponent(s)).join('/')
  const url = `${base}${seg}`
  return withOssVersion(url, getStaticAssetsVersion())
}

export const DEFAULT_PLACEHOLDER_IMAGE_URL = staticAssetUrl('images/logo.gif')
export const IMG_DEFAULT_PRODUCT = staticAssetUrl('images/default-product.png')
/** 全端统一：空列表 / 暂无 等占位图 */
export const IMG_NOTHING = staticAssetUrl('images/nothing.svg')
export const IMG_EMPTY = IMG_NOTHING
export const IMG_LOGO_WATERMARK = staticAssetUrl('images/logo.gif')
export const IMG_CLIPBOARD = staticAssetUrl('images/logo.gif')
export const IMG_PASSWORD_CARD = staticAssetUrl('images/logo.gif')
export const IMG_LINK = staticAssetUrl('images/logo.gif')
export const IMG_SETTINGS_AVATAR = staticAssetUrl('images/logo.gif')
export const IMG_SETTINGS_PASSWORD = staticAssetUrl('images/logo.gif')
export const IMG_CUSTOMER_SERVICE = staticAssetUrl('images/logo.gif')
export const ICON_ARROW_BOTTOM = staticAssetUrl('images/logo.gif')