#!/bin/sh
set -eu

SVXLINK_CONF="${SVXLINK_CONF:-/etc/svxlink/svxlink.conf}"
REMOTETRX_CONF="${REMOTETRX_CONF:-/etc/svxlink/remotetrx.conf}"
SVXREFLECTOR_CONF="${SVXREFLECTOR_CONF:-/etc/svxlink/svxreflector.conf}"

START_SVXLINK="${START_SVXLINK:-0}"
START_REMOTETRX="${START_REMOTETRX:-0}"
START_SVXREFLECTOR="${START_SVXREFLECTOR:-1}"

SVXLINK_ARGS="${SVXLINK_ARGS:-}"
REMOTETRX_ARGS="${REMOTETRX_ARGS:-}"
SVXREFLECTOR_ARGS="${SVXREFLECTOR_ARGS:-}"

pids=""

log() {
  echo "[$(date -Iseconds)] $*"
}

die() {
  log "ERROR: $*"
  exit 1
}

need_file_if_enabled() {
  enabled="$1"
  file="$2"
  name="$3"
  if [ "$enabled" = "1" ] && [ ! -f "$file" ]; then
    die "Config for $name not found: $file (expected volume mount)"
  fi
}

start_bg() {
  name="$1"
  shift
  log "Starting: $name -> $*"
  "$@" &
  pid="$!"
  pids="$pids $pid"
  log "$name started (pid=$pid)"
}

stop_all() {
  log "Stop requested; stopping: $pids"
  for pid in $pids; do
    kill -TERM "$pid" 2>/dev/null || true
  done

  i=0
  while [ $i -lt 10 ]; do
    alive=0
    for pid in $pids; do
      if kill -0 "$pid" 2>/dev/null; then
        alive=1
      fi
    done
    [ "$alive" -eq 0 ] && break
    i=$((i + 1))
    sleep 1
  done

  for pid in $pids; do
    kill -KILL "$pid" 2>/dev/null || true
  done
  log "Stop complete."
}

trap 'stop_all; exit 0' INT TERM

if [ "$START_SVXLINK" = "1" ] && ! command -v svxlink >/dev/null 2>&1; then
  die "svxlink binary not found"
fi
if [ "$START_REMOTETRX" = "1" ] && ! command -v remotetrx >/dev/null 2>&1; then
  die "remotetrx binary not found"
fi
if [ "$START_SVXREFLECTOR" = "1" ] && ! command -v svxreflector >/dev/null 2>&1; then
  die "svxreflector binary not found"
fi

need_file_if_enabled "$START_SVXLINK" "$SVXLINK_CONF" "svxlink"
need_file_if_enabled "$START_REMOTETRX" "$REMOTETRX_CONF" "remotetrx"
need_file_if_enabled "$START_SVXREFLECTOR" "$SVXREFLECTOR_CONF" "svxreflector"

if [ "$START_SVXREFLECTOR" = "1" ]; then
  start_bg "svxreflector" svxreflector --config "$SVXREFLECTOR_CONF" $SVXREFLECTOR_ARGS
fi

if [ "$START_REMOTETRX" = "1" ]; then
  start_bg "remotetrx" remotetrx --config "$REMOTETRX_CONF" $REMOTETRX_ARGS
fi

if [ "$START_SVXLINK" = "1" ]; then
  start_bg "svxlink" svxlink --config "$SVXLINK_CONF" $SVXLINK_ARGS
fi

if ! echo "$pids" | grep -q '[0-9]'; then
  die "No service enabled. Set START_SVXREFLECTOR=1 (lab default) and/or START_SVXLINK / START_REMOTETRX"
fi

log "Requested services are running. Waiting…"

exit_code=0
for pid in $pids; do
  if ! wait "$pid"; then
    exit_code=1
  fi
done

log "Exit (exit_code=$exit_code)"
exit "$exit_code"