#!/usr/bin/env bash
set -euo pipefail

deploy_env="${1:?Usage: deploy-standalone.sh test|production [artifact_dir]}"
artifact_dir="${2:-.deploy/role-user}"

case "${deploy_env}" in
  test)
    env_file=".env.test"
    ;;
  production)
    env_file=".env.production"
    ;;
  *)
    echo "Unknown deploy environment: ${deploy_env}" >&2
    exit 1
    ;;
esac

if [[ ! -f "${artifact_dir}/server.js" ]]; then
  echo "Standalone server.js not found in ${artifact_dir}" >&2
  exit 1
fi

project_name="${PROJECT_NAME:-role-user}"
base_dir="${DEPLOY_BASE_DIR:-/srv/www}"
target_dir="${DEPLOY_TARGET_DIR:-${base_dir}/${deploy_env}/${project_name}}"
deploy_remote="${DEPLOY_REMOTE:-}"
release_id="${BUILD_NUMBER:-manual}-$(git rev-parse --short=12 HEAD 2>/dev/null || date +%Y%m%d%H%M%S)"

remote_shell() {
  if [[ -n "${deploy_remote}" ]]; then
    ssh "${deploy_remote}" "$@"
  else
    bash -lc "$*"
  fi
}

remote_copy() {
  local source_dir="$1"
  local dest_dir="$2"

  if [[ -n "${deploy_remote}" ]]; then
    rsync -az --delete "${source_dir}/" "${deploy_remote}:${dest_dir}/"
  else
    mkdir -p "${dest_dir}"
    rsync -az --delete "${source_dir}/" "${dest_dir}/"
  fi
}

release_dir="${target_dir}/releases/${release_id}"
shared_dir="${target_dir}/shared"

remote_shell "mkdir -p '${release_dir}' '${shared_dir}' '${target_dir}/logs'"
remote_copy "${artifact_dir}" "${release_dir}"
remote_shell "
  set -euo pipefail
  if [ -f '${shared_dir}/${env_file}' ]; then
    ln -sfn '../../shared/${env_file}' '${release_dir}/${env_file}'
  else
    echo 'Missing ${shared_dir}/${env_file}; create it before starting the service.' >&2
  fi
  ln -sfn '${release_dir}' '${target_dir}/current'
"

if [[ -n "${DEPLOY_POST_DEPLOY_CMD:-}" ]]; then
  remote_shell "cd '${target_dir}/current' && ${DEPLOY_POST_DEPLOY_CMD}"
else
  echo "Deployed ${project_name} ${deploy_env} to ${target_dir}/current"
  echo "Start with: set -a; source ${target_dir}/shared/${env_file}; set +a; node ${target_dir}/current/server.js"
fi