from __future__ import annotations

_ZSH = r'''# nanoshare zsh completion -- add to ~/.zshrc:  eval "$(nanoshare completion zsh)"
_nanoshare_files() {
  local id path name size label
  while IFS=$'\t' read -r id path name size; do
    label="${path:+$path/}$name"
    [[ -n $id ]] && printf '%s:%s\n' "$id" "$label"
  done < <(nanoshare list --format tsv 2>/dev/null)
}

_nanoshare() {
  local -a commands common_opts login_opts sync_opts watch_opts download_opts
  commands=(login upload list download sync watch completion)
  common_opts=(--config --url --token --refresh-token --token-url --source --timeout --node)
  login_opts=(--config --node --source --scope --callback-host --callback-port --login-timeout --timeout --no-browser)
  sync_opts=($common_opts --note --expires --delete --ignore)
  watch_opts=($sync_opts --interval)
  download_opts=($common_opts --output -o)

  if (( CURRENT == 2 )); then
    compadd -- $commands
    return
  fi

  case ${words[2]} in
    login)
      compadd -- $login_opts
      ;;
    upload)
      compadd -- $common_opts --name --note --expires
      _files
      ;;
    list)
      compadd -- $common_opts --format
      ;;
    download)
      if (( CURRENT == 3 )); then
        local -a remote_files
        remote_files=("${(@f)$(_nanoshare_files)}")
        _describe 'remote file' remote_files
      else
        compadd -- $download_opts
        _files
      fi
      ;;
    sync|watch)
      compadd -- ${(P)${:-${words[2]}_opts}}
      _files -/
      ;;
    completion)
      (( CURRENT == 3 )) && compadd -- zsh bash
      ;;
  esac
}
compdef _nanoshare nanoshare
'''

_BASH = r'''# nanoshare bash completion -- add to ~/.bashrc:  eval "$(nanoshare completion bash)"
_nanoshare_files() {
  nanoshare list --format tsv 2>/dev/null
}

_nanoshare() {
  local cur="${COMP_WORDS[COMP_CWORD]}" cmd="${COMP_WORDS[1]}"
  local commands="login upload list download sync watch completion"
  local common_opts="--config --url --token --refresh-token --token-url --source --timeout --node"
  local login_opts="--config --node --source --scope --callback-host --callback-port --login-timeout --timeout --no-browser"
  local sync_opts="$common_opts --note --expires --delete --ignore"
  local watch_opts="$sync_opts --interval"
  local download_opts="$common_opts --output -o"

  if [ "$COMP_CWORD" -eq 1 ]; then
    COMPREPLY=( $(compgen -W "$commands" -- "$cur") )
    return
  fi

  case "$cmd" in
    login)
      COMPREPLY=( $(compgen -W "$login_opts" -- "$cur") ) ;;
    upload)
      COMPREPLY=( $(compgen -W "$common_opts --name --note --expires" -- "$cur") ) ;;
    list)
      COMPREPLY=( $(compgen -W "$common_opts --format" -- "$cur") ) ;;
    download)
      if [ "$COMP_CWORD" -eq 2 ]; then
        COMPREPLY=( $(compgen -W "$(_nanoshare_files | cut -f1)" -- "$cur") )
      else
        COMPREPLY=( $(compgen -W "$download_opts" -- "$cur") )
      fi ;;
    sync)
      COMPREPLY=( $(compgen -W "$sync_opts" -- "$cur") ) ;;
    watch)
      COMPREPLY=( $(compgen -W "$watch_opts" -- "$cur") ) ;;
    completion)
      [ "$COMP_CWORD" -eq 2 ] && COMPREPLY=( $(compgen -W "zsh bash" -- "$cur") ) ;;
  esac
}
complete -F _nanoshare nanoshare
'''


def script(shell: str) -> str:
  if shell == 'zsh':
    return _ZSH
  if shell == 'bash':
    return _BASH
  raise ValueError(f'unsupported shell: {shell}')