#!/usr/bin/env bash
# Synchronises the vendored copy of the whynot-design system from a pinned
# upstream commit. Source: ~/whynot-design (worktree) or a clone from gitea.
#
# Usage: ./scripts/sync-whynot-design.sh [<commit-or-ref>]
# Default: reads .whynot-design-ref from the vendor directory.
#
# See workplans/WP-0017-whynot-design-tokens.md for the adoption strategy.
set -euo pipefail

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
VENDOR_DIR="$ROOT/static/src/vendor/whynot-design"
REF_FILE="$VENDOR_DIR/.whynot-design-ref"
SRC_REPO="${WHYNOT_DESIGN_SRC:-$HOME/whynot-design}"

REF="${1:-}"
if [[ -z "$REF" && -f "$REF_FILE" ]]; then
  REF="$(cat "$REF_FILE")"
fi
if [[ -z "$REF" ]]; then
  echo "Usage: $0 <commit-or-ref>   (or write a ref to $REF_FILE)" >&2
  exit 2
fi

if [[ ! -d "$SRC_REPO/.git" ]]; then
  echo "Source not found: $SRC_REPO" >&2
  echo "Set WHYNOT_DESIGN_SRC or clone gitea:whynot/whynot-design there." >&2
  exit 1
fi

mkdir -p "$VENDOR_DIR/tokens"
git -C "$SRC_REPO" show "$REF:src/styles/colors_and_type.css" \
    > "$VENDOR_DIR/colors_and_type.css"
for f in colors.json type.json spacing.json index.json; do
  git -C "$SRC_REPO" show "$REF:tokens/$f" > "$VENDOR_DIR/tokens/$f"
done
git -C "$SRC_REPO" rev-parse "$REF" > "$REF_FILE"

echo "Vendor synced → $VENDOR_DIR (ref: $(cat "$REF_FILE"))"