import ../model/config_type
import strutils, sequtils
import osproc
import times
import os
import nativesockets

const BORG_BIN = "borg"

proc genArchiveName(): string = 
  let hostname = getHostname()
  let ts = getTime().format("yyyy-MM-dd'T'HH:mm:ssffffff")
  return hostname & "-" & ts

proc genCommand(cmd: string, repo: string, others: seq[string]): string =
  var str = BORG_BIN & " " & cmd & " "
  str &= " " & repo & " "
  str &= others.join(" ")
  return str

proc run(cmd: string): int =
  echo "Trying to run : ", cmd
  try:
    let res = execProcess(cmd)
    echo res
  except:
    echo getCurrentExceptionMsg()

proc runDiscard(cmd: string): int = 
  echo "Trying to run : ", cmd
  try:
    let res = execCmd(cmd)
    return res
  except:
    echo getCurrentExceptionMsg()
  return 1

proc initRepo(nc: NorgConfig, repo: Repository): int = 
  return runDiscard genCommand(cmd = "init", repo = repo.path, others = nc.args.others)

proc backupSources(nc: NorgConfig, repo: Repository): int =
  let others = concat(nc.source_dirs, nc.args.others)
  let archivename = repo.path & "::" & genArchiveName()
  return run genCommand(cmd = "create", repo = archivename, others = others)

proc listArchives(nc: NorgConfig, repo: Repository): int =
  return run genCommand(cmd = "list", repo = repo.path, others = nc.args.others)

proc mountArchive(nc: NorgConfig, repo: Repository): int =
  let archive = repo.path & "::" & nc.args.others[0]
  echo archive
  let others = nc.args.others[1..^1]
  let ok = runDiscard genCommand(cmd = "mount", repo = archive, others = others)
  if ok == 0:
    echo "Mounted ", archive, " at ", others[0]
  else:
    echo "Failed to mount ", archive


proc unmountArchive(nc: NorgConfig): int =
  let ok = runDiscard genCommand(cmd = "umount", repo = "", others = nc.args.others)
  if ok == 0:
    echo "Unmounted ", nc.args.others[0]
  else:
    echo "Failed to unmount ", nc.args.others[0]

proc execute*(nc: NorgConfig) =
  putEnv("BORG_PASSPHRASE", nc.getEncryptionPassword())
  for repo in nc.repositories:
    case nc.args.borg_cmd
    of "init":
      discard initRepo(nc, repo)
    of "backup":
      discard backupSources(nc, repo)
    of "create":
      discard backupSources(nc, repo)
    of "list":
      discard listArchives(nc, repo)
    of "mount":
      discard mountArchive(nc, repo)
    of "umount":
      discard unmountArchive(nc)
  delEnv("BORG_PASSPHRASE")