/*
 * OpenHome receiver control for the ohm audio backend.
 *
 * This file is part of Shairport Sync.
 * Copyright (c) Nils Schneider 2026
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#pragma once

#include <stddef.h>

/* XML-escape src into dst (NUL-terminated). Returns chars written (excluding NUL). */
size_t ohm_xml_escape(char *dst, size_t dst_cap, const char *src);

/* The backend declares volume as attenuation -OHM_UPNP_VOLUME_RANGE_CDB..0
 * (dB * 100); shairport stretches the AirPlay slider over exactly this range. */
#define OHM_UPNP_VOLUME_RANGE_CDB 6000

typedef struct {
  const char *receiver_name; /* friendly name to match; NULL disables the module */
  const char *interface_ip;
  const char *display_name;
  int standby_minutes; /* 0 = never */
  int ohu_port;
} ohm_upnp_config_t;

/* Strings are copied. */
void ohm_upnp_configure(const ohm_upnp_config_t *config);
int ohm_upnp_enabled(void);

/* Callback side: cheap, thread-safe, never block. */
void ohm_upnp_session_begin(void);
void ohm_upnp_session_end(void);
void ohm_upnp_set_volume(long vol_cdb); /* dB * 100, <= 0 */

/* Does the network work (SSDP discovery, SOAP); call periodically from one
 * thread. */
void ohm_upnp_tick(void);

void ohm_upnp_deinit(void);