#!/usr/bin/env sh
set -eu

RELEASE_VERSION="${RELEASE_VERSION:-20260513-330373b-11}"
BASE_URL="${BASE_URL:-http://10.8.0.1/ai_deploy}"
BUNDLE_NAME="${BUNDLE_NAME:-managed-portal-${RELEASE_VERSION}.zip}"
INSTALL_ROOT="${INSTALL_ROOT:-/opt/managed-portal-releases}"
TARGET_DIR="${TARGET_DIR:-${INSTALL_ROOT}/managed-portal-${RELEASE_VERSION}}"

require_command() {
  if ! command -v "$1" >/dev/null 2>&1; then
    echo "missing required command: $1" >&2
    exit 1
  fi
}

run_compose() {
  if command -v docker-compose >/dev/null 2>&1; then
    docker-compose "$@"
    return 0
  fi
  docker compose "$@"
}

download_bundle() {
  tmp_dir="$1"
  bundle_zip="$tmp_dir/$BUNDLE_NAME"
  bundle_url="${BASE_URL%/}/$BUNDLE_NAME"

  echo "downloading $bundle_url" >&2
  curl -fL "$bundle_url" -o "$bundle_zip"
  echo "$bundle_zip"
}

build_overlay_image() {
  overlay_name="$1"
  base_image="$2"
  overlay_root="$3"
  overlay_image="$4"
  overlay_context="$(dirname "$overlay_root")"

  if [ ! -d "$overlay_root" ]; then
    printf '%s\n' "$base_image"
    return 0
  fi

  if [ -z "$(find "$overlay_root" -mindepth 1 -print -quit)" ]; then
    printf '%s\n' "$base_image"
    return 0
  fi

  echo "building runtime overlay for $overlay_name" >&2
  docker build \
    -f "$TARGET_DIR/deploy/Dockerfile.runtime-overlay" \
    --build-arg "BASE_IMAGE=$base_image" \
    -t "$overlay_image" \
    "$overlay_context" >/dev/null
  printf '%s\n' "$overlay_image"
}

require_command curl
require_command unzip
require_command docker

tmp_dir="$(mktemp -d)"
trap 'rm -rf "$tmp_dir"' EXIT INT TERM

mkdir -p "$INSTALL_ROOT"
bundle_zip="$(download_bundle "$tmp_dir")"
rm -rf "$TARGET_DIR"
unzip -oq "$bundle_zip" -d "$INSTALL_ROOT"

if [ ! -f "$TARGET_DIR/release-manifest.env" ]; then
  echo "release-manifest.env not found in $TARGET_DIR" >&2
  exit 1
fi

set -a
. "$TARGET_DIR/release-manifest.env"
set +a

echo "pulling release images"
docker pull "$MANAGED_PORTAL_IMAGE"
docker pull "$MANAGED_PORTAL_WEB_IMAGE"
docker pull "$PEOPLE_FLOW_PROJECT_IMAGE"
docker pull "$STORE_DWELL_ALERT_IMAGE"

PEOPLE_FLOW_PROJECT_IMAGE="$(build_overlay_image \
  people-flow-project \
  "$PEOPLE_FLOW_PROJECT_IMAGE" \
  "$TARGET_DIR/runtime-overlays/people-flow-project/rootfs" \
  "managed-portal-runtime/people-flow-project:${RELEASE_VERSION}")"

STORE_DWELL_ALERT_IMAGE="$(build_overlay_image \
  store-dwell-alert \
  "$STORE_DWELL_ALERT_IMAGE" \
  "$TARGET_DIR/runtime-overlays/store-dwell-alert/rootfs" \
  "managed-portal-runtime/store-dwell-alert:${RELEASE_VERSION}")"

export MANAGED_PORTAL_IMAGE
export MANAGED_PORTAL_WEB_IMAGE
export PEOPLE_FLOW_PROJECT_IMAGE
export STORE_DWELL_ALERT_IMAGE

cd "$TARGET_DIR/deploy"
run_compose \
  --env-file managed-portal.release.env \
  -f docker-compose.ota-release.yml \
  up -d

echo "release installed under $TARGET_DIR"