import ../model/config_type
import ../model/state_type
import ../model/borg_type
import ../notifier/notifier
import ../utils/actions
import strutils
import strformat
import sequtils
import osproc
import times
import os
import nativesockets


proc genArchiveName(): string = 
  let hostname = getHostname()
  let ts = getTime().format("yyyy-MM-dd'T'HH:mm:ss'.'ffffff")
  return fmt"{hostname}-{ts}"

proc genCommand(cmd: string, repo: string, others: seq[string]): string =
  let args = others.join(" ")
  let cmd = fmt"{BORG_BIN} {cmd} {repo} {args}"
  return cmd

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

proc runDiscard(cmd: string): int = 
  echo fmt"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 createArchive(nc: NorgConfig, repo: Repository, archivename: string, retry: int = 0): int = 
  let others = concat(nc.source_directories, nc.args.others)
  let res = run genCommand(cmd = "create", repo = archivename, others = others)
  if res == 1:
    sleep 15 * 1000 # 15 seconds
    if retry == nc.retries:
      return 1
    else:
      return createArchive(nc, repo, archivename, retry + 1)
  return res

proc backupSources(nc: NorgConfig, repo: Repository): int =
  let start_time = now()
  notify(nc.notifiers, state=Running)
  let end_time = now()
  let archivename = repo.path & "::" & genArchiveName()
  let res = createArchive(nc, repo, archivename)
  let total = (end_time - start_time).inMilliSeconds()
  case res
  of 0:
    notify(nc.notifiers, state=Success, runtime=total)
  of 1:
    notify(nc.notifiers, state=Failure, runtime=total)
  else:
    notify(nc.notifiers, state=Failure, runtime=total)
  return res


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]
  let others = nc.args.others[1..^1]
  let ok = runDiscard genCommand(cmd = "mount", repo = archive, others = others)
  if ok == 0:
    echo fmt"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 isEmpty(dir: string): bool =
  var count = 0
  for idx, f in walkDir(dir): return false
  #count += 1
  return count == 0

proc extractArchive(nc: NorgConfig, repo: Repository): int =
  let archive = fmt"{repo.path}::{nc.args.others[0]}"
  var others = nc.args.others[1..^1]
  if nc.args.extract_destination != "":
    discard existsOrCreateDir(nc.args.extract_destination)
    setCurrentDir(nc.args.extract_destination)
  let dir = getCurrentDir()
  if dir.isEmpty():
    echo "Restoring..."
    let ok = run(genCommand(cmd = "extract", repo = archive, others = others))
    return ok
  else:
    echo "Not restoring to non-empty destination\r\nPlease use the --destination flag"

proc pruneRepo(nc: NorgConfig, repo: Repository): int = 
  echo "Not Yet Implemented."
  discard

proc compactRepo(nc: NorgConfig, repo: Repository): int = 
  echo "Not Yet Implemented."
  discard

proc checkRepo(nc: NorgConfig, repo: Repository): int = 
  echo "Not Yet Implemented."
  discard

proc execute*(nc: NorgConfig) =
  run_actions(norg_config.actions.before_everything)
  for repo in nc.repositories:
    run_actions(norg_config.actions.before_actions)
    case nc.args.borg_cmd
    of INIT:
      discard initRepo(nc, repo)
    of CREATE:
      run_actions(norg_config.actions.before_backup)
      discard backupSources(nc, repo)
      run_actions(norg_config.actions.after_backup)
    of LIST:
      discard listArchives(nc, repo)
    of MOUNT:
      discard mountArchive(nc, repo)
    of UMOUNT:
      discard unmountArchive(nc)
    of EXTRACT:
      run_actions(norg_config.actions.before_extract)
      discard extractArchive(nc, repo)
      run_actions(norg_config.actions.after_extract)
    of PRUNE:
      run_actions(norg_config.actions.before_prune)
      discard pruneRepo(nc, repo)
      run_actions(norg_config.actions.after_prune)
    of COMPACT:
      run_actions(norg_config.actions.before_compact)
      discard compactRepo(nc, repo)
      run_actions(norg_config.actions.after_compact)
    of CHECK:
      run_actions(norg_config.actions.before_check)
      discard checkRepo(nc, repo)
      run_actions(norg_config.actions.after_check)
    run_actions(norg_config.actions.after_actions)
  delEncryptionPassphraseInfo()
  run_actions(norg_config.actions.after_everything)