(* mclu: Mini Cloud
 * Copyright (C) 2014-2015 Red Hat Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *)

(* Implement 'mclu destroy'. *)

open Printf

open Utils

let get_arg_speclist () = []

let destroy ~verbose ?host name =
  let nodes = Mclu_conf.nodes () in
  let node =
    match host with
    | Some host ->
      (try List.find (fun n -> host = n.Mclu_conf.hostname) nodes
       with Not_found ->
         eprintf "mclu: host '%s' not found\n" host;
         exit 1)
    | None ->
      (* No 'host:' prefix given, so we need to find the host. *)
      let guests = Mclu_list.active_guests ~verbose ~nodes () in
      let node, _ =
        try
          List.find (
            fun (node, doms) ->
              List.exists (
                fun dom ->
                  name = dom.Mclu_list.dom_name
              ) doms
          ) guests
        with
          Not_found ->
            eprintf "mclu: guest '%s' not found\n" name;
            exit 1 in
      node in

  let uri = node.Mclu_conf.libvirt_uri in

  let cmd = sprintf "virsh -c %s destroy %s" (quote uri) (quote name) in
  if verbose then printf "%s\n%!" cmd;
  if Sys.command cmd <> 0 then (
    eprintf "mclu: %s: command failed\n" cmd;
    exit 1
  )

let run ~verbose = function
  | [ name ] ->
    let host, name = name_parse name in
    destroy ~verbose ?host name
  | _ ->
    eprintf "Usage: mclu destroy <[host:]name>\n";
    exit 1