#!/usr/bin/env bash
# Build deckcraft as an OCI container layout and push it to GitHub Container Registry (GHCR)
# for consumption by Flatpak OCI clients (flatpak-oci-specs).
#
# Usage:
#   packaging/linux/flatpak-oci.sh [--push] [TARBALL]
#
# Environment variables:
#   REGISTRY       Target registry image (default: ghcr.io/storytold/deckcraft)
#   TAG            Target image tag (default: $VERSION-$ARCH, also tags stable-$ARCH)
#   GITHUB_TOKEN   Token for GHCR authentication when --push is used
set -euo pipefail
# shellcheck source=../common.sh
. "$(dirname "${BASH_SOURCE[0]}")/../common.sh"
HERE="$ROOT/packaging/linux"

PUSH=0
TARBALL=""
while [[ $# -gt 0 ]]; do
  case "$1" in
    --push) PUSH=1; shift ;;
    -h | --help) sed -n '2,12p' "$0"; exit 0 ;;
    -*) echo "unknown argument: $1" >&2; exit 2 ;;
    *) TARBALL="$1"; shift ;;
  esac
done

ARCH="$(uname -m)"
case "$ARCH" in
  x86_64) ;;
  aarch64 | arm64) ARCH=aarch64 ;;
  *) echo "unsupported architecture $ARCH" >&2; exit 2 ;;
esac

BASENAME="deckcraft-$VERSION-linux-$ARCH"
OUT_OCI="$DIST/$BASENAME-oci"

echo "==> Building Flatpak OCI layout for $BASENAME"
"$HERE/flatpak-bundle.sh" --oci --no-test "${TARBALL:-}"

[[ -d "$OUT_OCI" ]] || { echo "error: $OUT_OCI layout not generated" >&2; exit 1; }

REGISTRY="${REGISTRY:-ghcr.io/storytold/deckcraft}"
TAG="${TAG:-$VERSION-$ARCH}"

echo "==> OCI layout ready at $OUT_OCI (Target: $REGISTRY:$TAG)"

if [[ "$PUSH" = 1 ]]; then
  command -v skopeo >/dev/null || { echo "error: skopeo is required to push OCI images (apt install skopeo)" >&2; exit 1; }

  AUTH_ARGS=()
  if [[ -n "${GITHUB_TOKEN:-}" ]]; then
    AUTH_ARGS=(--dest-creds "${GITHUB_ACTOR:-storytold}:$GITHUB_TOKEN")
  fi

  echo "==> Pushing to $REGISTRY:$TAG"
  skopeo copy --format oci "${AUTH_ARGS[@]}" "oci:$OUT_OCI" "docker://$REGISTRY:$TAG"

  # Also update architecture-specific stable tag
  echo "==> Pushing to $REGISTRY:stable-$ARCH"
  skopeo copy --format oci "${AUTH_ARGS[@]}" "oci:$OUT_OCI" "docker://$REGISTRY:stable-$ARCH"

  echo "==> Push complete"
fi