#!/usr/bin/env bash
# Materialize a darwin/arm64 imgproxy vendor binary into .runtime/imgproxy-native/.
# Prefers the local Homebrew Cellar binary; bundles non-system dylibs for 103.
set -euo pipefail

ROOT="$(cd "$(dirname "$0")/.." && pwd)"
OUT_DIR="${IMGPROXY_NATIVE_OUT_DIR:-${ROOT}/.runtime/imgproxy-native}"
VENDOR_DIR="${OUT_DIR}/vendor/imgproxy-runtime"
BIN_DIR="${VENDOR_DIR}/bin"
LIB_DIR="${VENDOR_DIR}/lib"
IMGPROXY_VERSION="${IMGPROXY_VERSION:-4.0.7}"
BREW_PREFIX="${HOMEBREW_PREFIX:-/opt/homebrew}"
DRY_RUN=0

# shellcheck source=scripts/lib/bundle-mach-dylibs.sh
source "${ROOT}/scripts/lib/bundle-mach-dylibs.sh"

case "${1:-}" in
  --dry-run) DRY_RUN=1 ;;
  --help|-h)
    cat <<'EOF'
Usage: bash scripts/build-imgproxy-runtime-native.sh [--dry-run]

Builds .runtime/imgproxy-native with:
  vendor/imgproxy-runtime/bin/imgproxy
  vendor/imgproxy-runtime/lib/*.dylib
  vendor/imgproxy-runtime/VERSION.txt
  vendor/imgproxy-runtime/SHA256SUMS
  scripts/install-imgproxy-native-prod.sh
  scripts/run-imgproxy-prod.sh
  imgproxy-compat-proxy.mjs
  RUNBOOK.txt

Set IMGPROXY_SOURCE_BIN to copy a specific binary, or IMGPROXY_VERSION for Cellar lookup.
EOF
    exit 0
    ;;
esac

resolve_imgproxy_binary() {
  if [[ -n "${IMGPROXY_SOURCE_BIN:-}" ]]; then
    [[ -x "${IMGPROXY_SOURCE_BIN}" ]] || {
      echo "IMGPROXY_SOURCE_BIN is not executable: ${IMGPROXY_SOURCE_BIN}" >&2
      exit 1
    }
    printf '%s\n' "${IMGPROXY_SOURCE_BIN}"
    return
  fi

  local cellar_bin="${BREW_PREFIX}/Cellar/imgproxy/${IMGPROXY_VERSION}/bin/imgproxy"
  if [[ -x "${cellar_bin}" ]]; then
    printf '%s\n' "${cellar_bin}"
    return
  fi

  if command -v brew >/dev/null 2>&1; then
    local tmp cache_glob candidate
    tmp="$(mktemp -d "${TMPDIR:-/tmp}/imgproxy-bottle.XXXXXX")"
    brew fetch --force-bottle imgproxy >/dev/null
    cache_glob="${HOME}/Library/Caches/Homebrew/downloads/*imgproxy*${IMGPROXY_VERSION}*.bottle.tar.gz"
    candidate="$(ls -1 ${cache_glob} 2>/dev/null | head -1 || true)"
    [[ -n "${candidate}" ]] || {
      echo "imgproxy ${IMGPROXY_VERSION} bottle not found after brew fetch" >&2
      exit 1
    }
    tar -xzf "${candidate}" -C "${tmp}"
    find "${tmp}" -path "*/bin/imgproxy" -type f | head -1
    return
  fi

  echo "imgproxy binary not found; install via brew or set IMGPROXY_SOURCE_BIN" >&2
  exit 1
}

if [[ "${DRY_RUN}" == 1 ]]; then
  candidate="$(resolve_imgproxy_binary || true)"
  printf 'version=%s\nsource=%s\nout_dir=%s\n' "${IMGPROXY_VERSION}" "${candidate:-missing}" "${OUT_DIR}"
  exit 0
fi

mkdir -p "${BIN_DIR}" "${LIB_DIR}" "${OUT_DIR}/scripts"
source_bin="$(resolve_imgproxy_binary)"
cp "${source_bin}" "${BIN_DIR}/imgproxy"
chmod 755 "${BIN_DIR}/imgproxy"
bundle_mach_dylibs "${BIN_DIR}/imgproxy" "${LIB_DIR}" "${source_bin}"
"${BIN_DIR}/imgproxy" version > "${VENDOR_DIR}/VERSION.txt"
(
  cd "${VENDOR_DIR}"
  shasum -a 256 bin/imgproxy VERSION.txt lib/* > SHA256SUMS
)

cp "${ROOT}/scripts/install-imgproxy-native-prod.sh" "${OUT_DIR}/scripts/"
cp "${ROOT}/scripts/run-imgproxy-prod.sh" "${OUT_DIR}/scripts/"
cp "${ROOT}/scripts/imgproxy-compat-proxy.mjs" "${OUT_DIR}/"
chmod 755 "${OUT_DIR}/scripts/install-imgproxy-native-prod.sh" "${OUT_DIR}/scripts/run-imgproxy-prod.sh"

cat > "${OUT_DIR}/RUNBOOK.txt" <<EOF
TKMind imgproxy native runtime (vendor binary)

Production base: /Users/john/Project/imgproxy-runtime
Persistent env: Portal /Users/john/Project/Memind/.env (IMGPROXY_SIGNING_KEY/SALT)
Active release:  current -> releases/<release-id>/
LaunchAgent:     cn.tkmind.imgproxy (127.0.0.1:20082)
Compat proxy:    cn.tkmind.imgproxy-compat (10.10.0.2:20081)
Health:          http://127.0.0.1:20082/health
Public:          https://img.tkmind.cn/health

Vendor binary:   vendor/imgproxy-runtime/bin/imgproxy
Bundled libs:    vendor/imgproxy-runtime/lib/
Built from:      ${source_bin}

This runtime replaces the Docker imgproxy container on 103.
Portal runtime releases stay separate.
EOF

lib_count="$(find "${LIB_DIR}" -name '*.dylib' | wc -l | tr -d ' ')"
printf 'imgproxy native runtime built at %s (%s, %s dylibs)\n' \
  "${OUT_DIR}" "$(cat "${VENDOR_DIR}/VERSION.txt")" "${lib_count}"