#!/bin/sh
set -eu

repo=${UNIDESK_TRAN_REPO_ROOT:-/root/unidesk}
if [ ! -f "$repo/scripts/cli.ts" ]; then
  self_dir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
  repo=$(CDPATH= cd -- "$self_dir/.." && pwd)
fi

host=${UNIDESK_MAIN_SERVER_IP:-${UNIDESK_MAIN_SERVER_HOST:-${CODE_QUEUE_DEV_CONTAINER_MASTER_HOST:-}}}
runner_env=0
if [ -n "${CODE_QUEUE_SERVICE_ROLE:-}" ] || [ -n "${CODE_QUEUE_INSTANCE_ID:-}" ] || [ -n "${KUBERNETES_SERVICE_HOST:-}" ]; then
  runner_env=1
fi

tran_lock_scope() {
  [ "$#" -ge 2 ] || return 1
  case "${UNIDESK_TRAN_SESSION_LOCK:-1}" in
    0|false|FALSE|no|NO|off|OFF) return 1 ;;
  esac
  route=$1
  case "$route" in
    ""|-*) return 1 ;;
  esac
  provider=${route%%:*}
  [ -n "$provider" ] || return 1
  plane=host
  case "$route" in
    *:win|*:win/*) plane=win ;;
    *:k3s*) plane=k3s ;;
  esac
  printf '%s\n' "$provider-$plane"
}

tran_acquire_lock() {
  scope=$1
  lock_root=${UNIDESK_TRAN_LOCK_DIR:-/tmp/unidesk-tran-locks}
  lock_name=$(printf '%s' "$scope" | tr -c 'A-Za-z0-9_.-' '_')
  lock_path=$lock_root/$lock_name.lock
  notice_seconds=${UNIDESK_TRAN_LOCK_NOTICE_SECONDS:-3}
  warning_seconds=${UNIDESK_TRAN_LOCK_WARNING_SECONDS:-10}
  timeout_seconds=${UNIDESK_TRAN_LOCK_TIMEOUT_SECONDS:-120}
  mkdir -p "$lock_root"
  started=$(date +%s)
  noticed=0
  warned=0
  while ! mkdir "$lock_path" 2>/dev/null; do
    now=$(date +%s)
    waited=$((now - started))
    if [ "$noticed" = 0 ] && [ "$waited" -ge "$notice_seconds" ]; then
      printf 'tran provider session lock waiting scope=%s waited=%ss; serializing concurrent opens to avoid provider session allocation timeouts\n' "$scope" "$waited" >&2
      noticed=1
    fi
    if [ "$warned" = 0 ] && [ "$waited" -ge "$warning_seconds" ]; then
      printf 'tran provider session lock warning scope=%s waited=%ss; high-frequency distributed calls are queued behind another tran, consider batching reads or checking stuck sessions if this repeats\n' "$scope" "$waited" >&2
      warned=1
    fi
    if [ "$waited" -ge "$timeout_seconds" ]; then
      printf 'tran provider session lock timeout scope=%s waited=%ss lock=%s\n' "$scope" "$waited" "$lock_path" >&2
      exit 255
    fi
    sleep 1
  done
  trap 'rmdir "$lock_path" 2>/dev/null || true' EXIT
}

if scope=$(tran_lock_scope "$@"); then
  tran_acquire_lock "$scope"
fi

if [ "$runner_env" = 1 ] && [ -n "$host" ] && [ "${UNIDESK_TRAN_LOCAL:-}" != "1" ]; then
  bun "$repo/scripts/cli.ts" --main-server-ip "$host" ssh "$@"
  exit $?
fi

bun "$repo/scripts/cli.ts" ssh "$@"