/*
 *  dolmetschctl
 *
 *
 *  Copyright (C) 2015 Christian Pointner <equinox@spreadspace.org>
 *
 *  This file is part of dolmetschctl.
 *
 *  dolmetschctl 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 3 of the License, or
 *  any later version.
 *
 *  dolmetschctl 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 dolmetschctl. If not, see <http://www.gnu.org/licenses/>.
 */

#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <error.h>
#include <assert.h>

#include "osc.h"
#include "midi.h"


static void print_error(int num, const char *msg, const char *path)
{
  error(0, 0, "liblo server error %d in path %s: %s", num, path, msg);
}

static int lang_handler(const char *path, const char *types, lo_arg ** argv,
                    int argc, lo_message msg, void *user_data)
{
  osc_t* o = (osc_t*)user_data;
  assert(o);

  if(argc != 1 || !lo_is_string_type((lo_type)types[0]))
    return 1;

//  printf("got ack for: lang '%s'\n", &(argv[0]->s));
  midi_enqueue_cmd((midi_t*)o->m_, &(argv[0]->s));

  return 0;
}

int osc_init(osc_t* o, void* m, const char* host, const char* port)
{
  assert(o != NULL);

  o->server_ = NULL;
  o->target_ = lo_address_new(host, port);
  o->m_ = m;

  if(!port)
    return 0;

  o->server_ = lo_server_new(NULL, print_error);
  if(!o->server_)
    return -1;

  if(!lo_server_add_method(o->server_, "/lang/ack", "s", lang_handler, (void*)o))
    return -1;

  return 0;
}

int osc_switch_lang(osc_t* o, const char* lang)
{
  lo_send_from(o->target_, o->server_, LO_TT_IMMEDIATE, "/lang/switch", "s", lang);
  return 0;
}

int osc_get_poll_fd_count(osc_t* o)
{
  assert(o);

  if(!o->server_)
    return 0;

  return 1;
}

int osc_get_poll_fds(osc_t* o, struct pollfd *pfds, int npfds)
{
  assert(o);

  if(!o->server_)
    return 0;

  pfds[0].fd = lo_server_get_socket_fd(o->server_);
  pfds[0].events = POLLIN;
  pfds[0].revents = 0;

  return 0;
}

int osc_handle_revents(osc_t* o, struct pollfd *pfds, int npfds)
{
  assert(o);

  if(!o->server_)
    return 0;

  if(pfds[0].revents & (POLLERR | POLLHUP | POLLNVAL)) {
    error(0, 0, "OSC: got POLLERR, POLLHUP or POLLNVAL");
    return -1;
  }
  if(!(pfds[0].revents & POLLIN))
    return 0;

  lo_server_recv_noblock(o->server_, 0);

  return 0;
}