import ens, provider
import stew/byteutils
from stew/base32 import nil
from stew/base58 import nil
import chronicles, httpclient, net
import strutils
import semver
import constants


type
  VersionInfo* = object
    version*: string
    url*: string

proc getLatestVersion*(): VersionInfo =
  let contentHash = contenthash(APP_UPDATES_ENS)
  if contentHash == "":
    raise newException(ValueError, "ENS does not have a content hash")

  var url: string = ""

  let decodedHash = contentHash.decodeENSContentHash()

  case decodedHash[0]:
    of ENSType.IPFS:
      let
        base58bytes = base58.decode(base58.BTCBase58, decodedHash[1])
        base32Hash = base32.encode(base32.Base32Lower, base58bytes)

      url = "https://" & base32Hash & IPFS_GATEWAY

    of ENSType.SWARM:
      url = "https://" & SWARM_GATEWAY & "/bzz:/" & decodedHash[1]

    of ENSType.IPNS:
      url = "https://" & decodedHash[1]

    else:
      warn "Unknown content for", contentHash
      raise newException(ValueError, "Unknown content for " & contentHash)

  # Read version from folder
  let secureSSLContext = newContext()
  let client = newHttpClient(sslContext = secureSSLContext, timeout = CHECK_VERSION_TIMEOUT_MS)
  result.version = client.getContent(url & "/VERSION").strip()
  result.url = url

proc isNewer*(currentVersion, versionToCheck: string): bool =
  let lastVersion = parseVersion(versionToCheck)
  let currVersion = parseVersion(currentVersion)
  result = lastVersion > currVersion