.bash_tmux_specific

# vim: set ft=sh:
# Is tmux installed?
tmux_is_installed() {
  &>/dev/null which tmux
}

get_additional_windows_csv() {
  local session="$1"
  env_key="ADDITIONAL_TMUX_WINDOWS_CSV_$(tr '[:lower:]' '[:upper:]' <<< "$session")"
  default_env_key="ADDITIONAL_TMUX_WINDOWS_CSV_DEFAULT"
  for k in "$env_key" "$default_env_key"
  do
    v="${!k}"
    test -z "$v" && continue

    echo "$v"
    return 0
  done
  log_error "$env_key or $default_env_key not defined."
  return 1
}

add_additional_tmux_windows() {
  local session="$1"
  additional_windows_csv="$(get_additional_windows_csv "$session")"
  test -z "$additional_windows_csv" && return 0

  tmux display-message "Additional windows: $additional_windows_csv"
  idx=1
  for window in $(echo "$additional_windows_csv" | tr ',' '\n')
  do
    tmux new-window -t "$session:$idx" -n "$window"
    idx=$((idx+1))
  done
}

# Are we in an SSH session?
in_ssh_session() {
  ! test -z "$SSH_CLIENT"
}

# Are we in a TMUX shell already?
in_tmux_session() {
  ! test -z "$TMUX"
}

tmux_is_disabled() {
  ! test -z "$DISABLE_TMUX"
}

# Is tmux supported by this OS?
tmux_is_supported() {
  os=$(get_os_type)
  case "$os" in
    Darwin|Ubuntu|Debian)
      return 0
      ;;
    *)
      return 1
      ;;
  esac
}

tmux_session_is_present() {
  test "$(tmux ls 2>/dev/null | wc -l)" -gt "0"
}

join_tmux_session() {
  tmux a -t 0
}

reattach_to_user_namespace_not_found() {
  ! test -f "$(which reattach-to-user-namespace 2>/dev/null)"
}

# Starts a new tmux session with my usual window configuration.
start_tmux() {
  start_tmux_with_multiple_windows() {
    local session="$1"
    tmux new-session -d -s "$session" && \
      add_additional_tmux_windows "$session" && \
      tmux select-window -t "$session:0" && \
      tmux attach-session -t "$session"
  }
  start_tmux_with_single_window() {
    local session="$1"
    tmux new-session -d -s "$session" && \
      tmux select-pane -t 0 && \
      tmux attach-session -t "$session"
  }

  session_name="${1:-$TMUX_SESSION_NAME}"
  cd "$HOME" || return
  if reattach_to_user_namespace_not_found
  then
    log_error "reattach-to-user-namespace not installed or found in \
\$PATH. Please install it with 'brew install reattach-to-user-namespace' and then
'source $HOME/.bash_profile' again."
    return 1
  fi
  if tmux ls | grep -q "$session_name"
  then
    tmux attach -t "$session_name" 2>/dev/null
  else
    if in_ssh_session
    then start_tmux_with_single_window "$session_name"
    else start_tmux_with_multiple_windows "$session_name"
    fi
  fi
}

# Installs tmux
install_tmux_and_tpm() {
  install_tmux() {
    case "$(get_os_type)" in
      "Darwin")
        brew install tmux bash-completion reattach-to-user-namespace
        ;;
      "Ubuntu"|"Debian")
        sudo add-apt-repository -y ppa:pi-rho/dev sudo apt-get update
        install_application tmux python-software-properties software-properties-common tmux-next
        ;;
      *)
        log_info "tmux not supported by this operating system."
        return 0
        ;;
    esac
  }
  install_tpm() {
    git clone https://github.com/tmux-plugins/tpm ~/.tmux/plugins/tpm;
  }
  install_tmux_yank() {
    if [ ! -d "$HOME/.tmux.d" ]
    then
      git clone https://github.com/tmux-plugins/tmux-yank ~/.tmux.d
    fi
  }
  install_tmux && install_tpm && install_tmux_yank
}