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

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ROOT_DIR="$(cd "${SCRIPT_DIR}/.." && pwd)"
source "${SCRIPT_DIR}/package_common.sh"

require_command dpkg-deb
require_command python3

VERSION="$(project_version)"
PACKAGE_NAME="$(project_name)"
ARCH="${DEB_ARCH:-}"
if [[ -z "${ARCH}" ]]; then
  if command -v dpkg >/dev/null 2>&1; then
    ARCH="$(dpkg --print-architecture)"
  else
    ARCH="amd64"
  fi
fi

build_wheel
WHEEL_PATH="$(latest_wheel_path)"
RUNTIME_REQUIREMENTS="${BUILD_DIR}/deb/runtime-requirements.txt"
write_runtime_requirements "${RUNTIME_REQUIREMENTS}"

STAGE_DIR="${BUILD_DIR}/deb/${PACKAGE_NAME}_${VERSION}_${ARCH}"
PACKAGE_BASENAME="${PACKAGE_NAME}_${VERSION}_${ARCH}"
DEB_PATH="${DIST_DIR}/${PACKAGE_BASENAME}.deb"
VENV_DIR="${STAGE_DIR}/opt/${PACKAGE_NAME}/venv"
PIP_ARGS=()
if [[ -n "${AMAN_WHEELHOUSE_DIR:-}" ]]; then
  PIP_ARGS+=(--no-index --find-links "${AMAN_WHEELHOUSE_DIR}")
fi

rm -rf "${STAGE_DIR}"
mkdir -p "${STAGE_DIR}/DEBIAN"
mkdir -p "${STAGE_DIR}/usr/bin"
mkdir -p "${STAGE_DIR}/usr/lib/systemd/user"
mkdir -p "${STAGE_DIR}/opt/${PACKAGE_NAME}"

render_template \
  "${ROOT_DIR}/packaging/deb/control.in" \
  "${STAGE_DIR}/DEBIAN/control" \
  "PACKAGE_NAME=${PACKAGE_NAME}" \
  "VERSION=${VERSION}" \
  "ARCH=${ARCH}"

cp "${ROOT_DIR}/packaging/deb/postinst" "${STAGE_DIR}/DEBIAN/postinst"
chmod 0755 "${STAGE_DIR}/DEBIAN/postinst"

python3 -m venv --system-site-packages "${VENV_DIR}"
"${VENV_DIR}/bin/python" -m pip install "${PIP_ARGS[@]}" --requirement "${RUNTIME_REQUIREMENTS}"
"${VENV_DIR}/bin/python" -m pip install "${PIP_ARGS[@]}" --no-deps "${WHEEL_PATH}"

cat >"${STAGE_DIR}/usr/bin/${PACKAGE_NAME}" <<EOF
#!/usr/bin/env bash
set -euo pipefail
exec /opt/${PACKAGE_NAME}/venv/bin/${PACKAGE_NAME} "\$@"
EOF
chmod 0755 "${STAGE_DIR}/usr/bin/${PACKAGE_NAME}"

cp "${ROOT_DIR}/systemd/aman.service" "${STAGE_DIR}/usr/lib/systemd/user/aman.service"

rm -f "${DEB_PATH}"
dpkg-deb --build --root-owner-group "${STAGE_DIR}" "${DEB_PATH}"
echo "built ${DEB_PATH}"