#!/bin/sh
# Janus SFU on cast02 + ac-ms-sfu-signaling config on all app nodes.
set -eu
ROOT="$(cd "$(dirname "$0")/.." && pwd)"
# shellcheck source=/dev/null
. "$ROOT/scripts/lib/common.sh"
load_cluster_env

WS="${AC_WORKSPACE_ROOT:-/var/www/ac/workspace}"
AC_REPO="${AC_MONOREPO_ROOT:-/mnt/repos/ac}"
SFU_WS="${WS}/ac-ms-sfu-signaling"
if [ ! -d "$SFU_WS" ] && [ -d "${AC_REPO}/ac-ms-sfu-signaling" ]; then
  mkdir -p "$(dirname "$SFU_WS")"
  rsync -a --delete "${AC_REPO}/ac-ms-sfu-signaling/" "$SFU_WS/" 2>/dev/null \
    || cp -a "${AC_REPO}/ac-ms-sfu-signaling/." "$SFU_WS/"
fi
[ -d "$SFU_WS" ] || die "missing ac-ms-sfu-signaling (run deploy-ac-workspace.sh first)"

PUBLIC_ORIGIN="${LAB_PUBLIC_ORIGIN:-https://apps.f0xx.org}"
JANUS_HTTP="http://${CAST02_IP}:8088/janus"
JANUS_WS="ws://${CAST02_IP}:8188"

install_janus_on_cast02() {
  [ "$(host_short)" = "$CAST02_HOST" ] || return 0
  log "cast02: install/configure Janus SFU"
  if ! command -v janus >/dev/null 2>&1; then
    apk add --no-cache janus-gateway janus-gateway-openrc
  fi
  for _pair in \
    "janus.jcfg janus.jcfg.sample" \
    "janus.transport.http.jcfg janus.transport.http.jcfg.sample" \
    "janus.transport.websockets.jcfg janus.transport.websockets.jcfg.sample" \
    "janus.plugin.videoroom.jcfg janus.plugin.videoroom.jcfg.sample"
  do
    _dst="${_pair%% *}"
    _src="${_pair#* }"
    [ -f "/etc/janus/${_dst}" ] || cp "/etc/janus/${_src}" "/etc/janus/${_dst}"
  done
  rc-update add janus-gateway default 2>/dev/null || true
  rc-service janus-gateway restart 2>/dev/null || rc-service janus-gateway start 2>/dev/null || true
  if curl -sf "http://127.0.0.1:8088/janus/info" >/dev/null 2>&1; then
    log "cast02: Janus HTTP API OK"
  else
    log "WARN cast02: Janus health check failed (may still be starting)"
  fi
}

write_sfu_config() {
  DB_PASS="$(read_cred mariadb_app password 2>/dev/null || echo 'CHANGE_ME')"
  mkdir -p "${SFU_WS}/config"
  cat > "${SFU_WS}/config/config.php" <<PHPEOF
<?php
return [
    'janus_url'     => '${JANUS_HTTP}',
    'janus_ws_url'  => '${JANUS_WS}',
    'signaling_url' => '${PUBLIC_ORIGIN}/app/androidcast_project/sfu/ws',
    'db_dsn'        => 'mysql:host=${PRIMARY_DB_HOST};dbname=androidcast_crashes;charset=utf8mb4',
    'db_user'       => 'androidcast',
    'db_pass'       => '${DB_PASS}',
];
PHPEOF
  chown -R nginx:nginx "$SFU_WS" 2>/dev/null || true
  log "sfu signaling config → ${SFU_WS}/config/config.php"
}

apply_sfu_schema() {
  is_primary_node || return 0
  log "primary: apply SFU schema migrations"
  run_script "$ROOT/scripts/load-schemas.sh" || log "WARN load-schemas returned non-zero (may already be applied)"
}

install_janus_on_cast02
write_sfu_config
apply_sfu_schema
run_script "$ROOT/scripts/configure-nginx.sh"
rc-service php-fpm83 restart 2>/dev/null || true

if [ "$(host_short)" = "$CAST02_HOST" ]; then
  curl -sf "http://127.0.0.1:8088/janus/info" | head -c 120 || true
  echo
fi

log "deploy-janus-sfu_ok $(host_short)"