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

APP_HOME="${APP_HOME:-/home/zaine/master-folder/org-platform/org_backend}"
SERVICE_NAME="${SERVICE_NAME:-org-backend.service}"
SYSTEMCTL_TIMEOUT="${SYSTEMCTL_TIMEOUT:-120}"
ENV_FILE="${ENV_FILE:-/etc/org-backend/org-backend.env}"

SOURCE_DIR="$(pwd)"
SOURCE_JAR="${SOURCE_DIR}/target/org-backend.jar"
APP_TARGET_DIR="${APP_HOME}/target"
APP_JAR="${APP_TARGET_DIR}/org-backend.jar"
SOURCE_SERVICE="${SOURCE_DIR}/misc/${SERVICE_NAME}"
SYSTEMD_SERVICE="/etc/systemd/system/${SERVICE_NAME}"

run_sudo() {
  if [[ -n "${SUDO_PASSWORD:-}" ]]; then
    printf '%s\n' "${SUDO_PASSWORD}" | sudo -S -p '' "$@"
  else
    sudo -n "$@"
  fi
}

if [[ ! -f "${SOURCE_JAR}" ]]; then
  echo "Missing built jar: ${SOURCE_JAR}" >&2
  exit 1
fi

if [[ ! -f "${SOURCE_SERVICE}" ]]; then
  echo "Missing service file: ${SOURCE_SERVICE}" >&2
  exit 1
fi

mkdir -p "${APP_TARGET_DIR}"

if [[ "$(realpath "${SOURCE_JAR}")" != "$(realpath -m "${APP_JAR}")" ]]; then
  echo "Installing jar to ${APP_JAR}"
  install -m 0644 "${SOURCE_JAR}" "${APP_JAR}"
else
  echo "Built jar is already in place at ${APP_JAR}"
fi

echo "Checking sudo access"
run_sudo true

echo "Checking runtime env file at ${ENV_FILE}"
if ! run_sudo test -f "${ENV_FILE}"; then
  echo "Missing ${ENV_FILE}. Create it on the server with the production values required by the app." >&2
  exit 1
fi

echo "Linking project systemd unit to ${SYSTEMD_SERVICE}"
run_sudo rm -f "${SYSTEMD_SERVICE}"
run_sudo ln -s "${SOURCE_SERVICE}" "${SYSTEMD_SERVICE}"

echo "Reloading systemd"
run_sudo systemctl daemon-reload

echo "Enabling ${SERVICE_NAME}"
run_sudo systemctl enable "${SERVICE_NAME}"

echo "Restarting ${SERVICE_NAME}"
if ! timeout "${SYSTEMCTL_TIMEOUT}" bash -c "$(declare -f run_sudo); run_sudo systemctl --no-ask-password restart \"${SERVICE_NAME}\""; then
  echo "Restart did not finish within ${SYSTEMCTL_TIMEOUT}s" >&2
  run_sudo systemctl --no-pager --full status "${SERVICE_NAME}" || true
  exit 1
fi

echo "Service status"
run_sudo systemctl --no-pager --full status "${SERVICE_NAME}"