import { AlertTypeEnum } from "@scandic-hotels/common/constants/alert"
import {
  removeMultipleSlashes,
  removeTrailingSlash,
} from "@scandic-hotels/common/utils/url"

import { CAMPAIGN_BANNER_HIDE_CONDITIONS } from "@/components/CampaignBanner/constants"

import type { Lang } from "@scandic-hotels/common/constants/language"

export function shouldShowCampaignBanner(
  pathname: string,
  lang: Lang,
  closedPaths: Set<string>,
  sitewideAlertType: AlertTypeEnum | null
): boolean {
  const cleanPathname = removeTrailingSlash(removeMultipleSlashes(pathname))

  // Check if the banner should not be visible on the current path based on hide conditions.
  const isOnHideRoute = CAMPAIGN_BANNER_HIDE_CONDITIONS.routes[lang].some(
    (route) => {
      const fullRoute = removeTrailingSlash(
        removeMultipleSlashes(`/${lang}${route}`)
      )
      return cleanPathname.startsWith(fullRoute)
    }
  )

  if (isOnHideRoute) {
    return false
  }

  // The campaign banner should not be visible if there is an alarming sitewide alert
  if (sitewideAlertType === AlertTypeEnum.Alarm) {
    return false
  }

  // Check if the user closed the banner and should therefore not be visible on the current path.
  // This is saved in a local state and is reset on page reload.
  if (closedPaths.has(pathname)) {
    return false
  }

  return true
}