import type { DriveView } from "@/lib/drive/drive-url"
import { decodePathSegment, encodePathSegments, folderPathFromSegments } from "@/lib/drive/drive-url"

export function normalizeDriveFolderPath(path: string): string {
  if (!path || path === "/") return "/"
  return "/" + path.replace(/^\/+/, "").replace(/\/+$/, "")
}

export function driveFolderHref(view: DriveView, folderPath: string): string {
  const normalized = normalizeDriveFolderPath(folderPath)
  if (normalized === "/") {
    return view === "shared" ? "/drive/shared" : "/drive"
  }
  const segments = normalized
    .slice(1)
    .split("/")
    .map(decodePathSegment)
  const encoded = encodePathSegments(segments)
  return view === "shared" ? `/drive/shared/folders/${encoded}` : `/drive/folders/${encoded}`
}

export function ancestorFolderPaths(folderPath: string): string[] {
  const normalized = normalizeDriveFolderPath(folderPath)
  if (normalized === "/") return ["/"]
  const parts = normalized.slice(1).split("/")
  const out: string[] = ["/"]
  for (let i = 0; i < parts.length; i++) {
    out.push("/" + parts.slice(0, i + 1).join("/"))
  }
  return out
}

export function selectedFolderPath(view: DriveView, pathSegments: string[]): string {
  if (view === "shared" && pathSegments.length === 0) return "/__shared_root__"
  return folderPathFromSegments(pathSegments)
}

export function isSharedRootSelected(view: DriveView, pathSegments: string[]): boolean {
  return view === "shared" && pathSegments.length === 0
}