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

ROOT="$(cd "$(dirname "$0")/.." && pwd)"
IMAGE_REF="${IMGPROXY_IMAGE_REF:-darthsim/imgproxy@sha256:3819ccd5ee26b83b27f8184b17a0a0c6f0eb21052efa9f554b23a7c39a3e6a1f}"
IMAGE_TAG="${IMGPROXY_IMAGE_TAG:-tkmind/imgproxy-runtime:20260715-3819ccd5}"
OUT_DIR="${IMGPROXY_RUNTIME_OUT_DIR:-${ROOT}/.runtime/imgproxy}"
DRY_RUN=0

[[ "${1:-}" != "--dry-run" ]] || DRY_RUN=1

mkdir -p "$OUT_DIR"
if [[ "$DRY_RUN" == 1 ]]; then
  printf 'image_ref=%s\nimage_tag=%s\nout_dir=%s\n' "$IMAGE_REF" "$IMAGE_TAG" "$OUT_DIR"
  exit 0
fi

command -v docker >/dev/null || { echo 'docker is required to build the imgproxy runtime image' >&2; exit 1; }
if ! docker image inspect "$IMAGE_REF" >/dev/null 2>&1; then
docker pull --platform linux/arm64 "$IMAGE_REF"
fi
docker tag "$IMAGE_REF" "$IMAGE_TAG"
docker save "$IMAGE_TAG" | gzip -c > "$OUT_DIR/imgproxy-runtime-image.tar.gz"
(cd "$OUT_DIR" && shasum -a 256 imgproxy-runtime-image.tar.gz > imgproxy-runtime-image.tar.gz.sha256)
printf '%s\n' "$IMAGE_TAG" > "$OUT_DIR/image-tag.txt"