import { mkdir, rm, writeFile } from "node:fs/promises"
import path from "node:path"

import { buildMediaStorageKey } from "@/lib/media/storage-key"

type StoreLocalUploadParams = {
  file: File
  tenantId: string
  assetId: string
  fileRole: string
  variant: string
}

type StoredUpload = {
  storageKey: string
}

export function resolveLocalMediaBaseDirectory(): string {
  const configured = process.env.CMS_MEDIA_LOCAL_STORAGE_DIR?.trim()

  if (configured) {
    return path.resolve(configured)
  }

  return path.resolve(process.cwd(), ".data", "media")
}

export async function storeUploadLocally(params: StoreLocalUploadParams): Promise<StoredUpload> {
  const storageKey = buildMediaStorageKey({
    tenantId: params.tenantId,
    assetId: params.assetId,
    fileRole: params.fileRole,
    variant: params.variant,
    fileName: params.file.name,
  })
  const baseDirectory = resolveLocalMediaBaseDirectory()
  const outputPath = path.join(baseDirectory, storageKey)

  await mkdir(path.dirname(outputPath), { recursive: true })

  const bytes = new Uint8Array(await params.file.arrayBuffer())
  await writeFile(outputPath, bytes)

  return { storageKey }
}

export async function deleteLocalStorageObject(storageKey: string): Promise<boolean> {
  const baseDirectory = resolveLocalMediaBaseDirectory()
  const outputPath = path.join(baseDirectory, storageKey)

  try {
    await rm(outputPath)
    return true
  } catch (error) {
    const code =
      typeof error === "object" && error !== null && "code" in error
        ? String((error as { code?: unknown }).code)
        : ""

    if (code === "ENOENT") {
      return false
    }

    throw error
  }
}