#!/usr/bin/env bash

function error_handler() {
  >&2 echo "Exited with BAD EXIT CODE '${2}' in ${0} script at line: ${1}."
  exit "$2"
}
trap 'error_handler ${LINENO} $?' ERR
set -o errtrace -o errexit -o nounset -o pipefail

# run migrations
export FLASK_APP=/app/src/spiffworkflow_backend

if [[ "${SPIFFWORKFLOW_BACKEND_WAIT_FOR_DB_TO_BE_READY:-}" == "true" ]]; then
  echo 'Waiting for db to be ready...'
  poetry run python ./bin/wait_for_db_to_be_ready.py
fi

if [[ "${SPIFFWORKFLOW_BACKEND_DOWNGRADE_DB:-}" == "true" ]]; then
  echo 'Downgrading database...'
  poetry run flask db downgrade
fi

if [[ "${SPIFFWORKFLOW_BACKEND_UPGRADE_DB:-}" == "true" ]]; then
  echo 'Upgrading database...'
  poetry run flask db upgrade
fi

if [[ -z "${GUNICORN_LOG_LEVEL:-}" ]]; then
  GUNICORN_LOG_LEVEL=debug
fi

if [[ -z "${GUNICORN_TIMEOUT_SECONDS:-}" ]]; then
  GUNICORN_TIMEOUT_SECONDS=90
fi

port="${SPIFFWORKFLOW_BACKEND_PORT:-}"
if [[ -z "$port" ]]; then
  port=7000
fi

additional_args=""

if [[ "${SPIFFWORKFLOW_BACKEND_APPLICATION_ROOT:-}" != "/" ]]; then
  additional_args="${additional_args} -e SCRIPT_NAME=${SPIFFWORKFLOW_BACKEND_APPLICATION_ROOT}"
fi

# HACK: if loading fixtures for acceptance tests when we do not need multiple workers
# it causes issues with attempting to add duplicate data to the db
workers=3
if [[ "${SPIFFWORKFLOW_BACKEND_LOAD_FIXTURE_DATA:-}" == "true" ]]; then
  workers=1
fi

if [[ "${SPIFFWORKFLOW_BACKEND_RUN_DATA_SETUP:-}" != "false" ]]; then
  SPIFFWORKFLOW_BACKEND_FAIL_ON_INVALID_PROCESS_MODELS=false poetry run python bin/save_all_bpmn.py
fi

if [[ -n "${SPIFFWORKFLOW_BACKEND_GIT_SSH_PRIVATE_KEY:-}" ]]; then
  if [[ -z "${SPIFFWORKFLOW_BACKEND_GIT_SSH_PRIVATE_KEY_PATH:-}" ]]; then
    export SPIFFWORKFLOW_BACKEND_GIT_SSH_PRIVATE_KEY_PATH=$(mktemp /tmp/ssh_private_key.XXXXXX)
  fi
  chmod 600 "${SPIFFWORKFLOW_BACKEND_GIT_SSH_PRIVATE_KEY_PATH}"
  echo "${SPIFFWORKFLOW_BACKEND_GIT_SSH_PRIVATE_KEY}" >"${SPIFFWORKFLOW_BACKEND_GIT_SSH_PRIVATE_KEY_PATH}"
fi

# Assure that the the Process Models Directory is initialized as a git repo
git init "${SPIFFWORKFLOW_BACKEND_BPMN_SPEC_ABSOLUTE_DIR}"
git config --global --add safe.directory "${SPIFFWORKFLOW_BACKEND_BPMN_SPEC_ABSOLUTE_DIR}"

export IS_GUNICORN="true"
# THIS MUST BE THE LAST COMMAND!
exec poetry run gunicorn ${additional_args}  \
  --bind "0.0.0.0:$port"  \
  --workers="$workers"  \
  --limit-request-line 8192  \
  --timeout "$GUNICORN_TIMEOUT_SECONDS"  \
  --capture-output  \
  --access-logfile '-'  \
  --log-level "$GUNICORN_LOG_LEVEL" wsgi:app