#!/usr/bin/env bash
# frozen_string_literal: true
#
# bin/sync-upstream — automate upstream DocuSeal sync
#
# Usage:
#   bin/sync-upstream <tag>
#
# Example:
#   bin/sync-upstream 3.0.2
#
# Environment:
#   UPSTREAM_REMOTE  (default: upstream)
#   UPSTREAM_URL     (default: https://github.com/docusealco/docuseal.git)

set -euo pipefail

UPSTREAM_REMOTE="${UPSTREAM_REMOTE:-upstream}"
TAG="${1:-}"

if [ -z "$TAG" ]; then
  echo "Usage: $0 <tag>" >&2
  echo "  e.g. $0 3.0.2" >&2
  exit 1
fi

# Ensure rerere is on so recurring conflict resolutions are cached
git config rerere.enabled true
git config rerere.autoupdate true

echo "=== Fetching $UPSTREAM_REMOTE ==="
git fetch "$UPSTREAM_REMOTE" --tags

# Record the commit at the tag so we can verify later
TAG_COMMIT="$(git rev-parse --verify "$TAG^{commit}" 2>/dev/null || true)"
if [ -z "$TAG_COMMIT" ]; then
  echo "Tag $TAG not found. Double-check the tag name." >&2
  exit 1
fi

echo "=== Creating sync/upstream-$TAG from $TAG ==="
git checkout -b "sync/upstream-$TAG" "$TAG"

echo "=== Applying rebrand sweep ==="
bin/rebrand-sync

echo "=== Committing rebranded tree ==="
git add -A
if git diff --cached --quiet; then
  echo "Nothing to commit — rebrand-sync produced no changes."
else
  git commit -m "Apply WaboSign rebrand sweep to upstream $TAG"
fi

echo "=== Merging into master ==="
git checkout master
git merge --no-ff "sync/upstream-$TAG" -m "Merge upstream $TAG into master"

echo "=== Restoring WaboSign binary assets overwritten by merge ==="
# Merging an upstream tag may overwrite our brand logo files that rebrand-sync
# cannot protect (they are binary / opaque-image and bypass the text sweep).
# Restore them from pre-merge master (ORIG_HEAD).
LOGO_FILES=(
  public/favicon.svg
  public/favicon.ico
  public/favicon-16x16.png
  public/favicon-32x32.png
  public/favicon-96x96.png
  public/logo.svg
)
for f in "${LOGO_FILES[@]}"; do
  if git show ORIG_HEAD:"$f" &>/dev/null 2>&1; then
    git checkout ORIG_HEAD -- "$f"
    echo "  restored: $f"
  fi
done

echo "=== Catching new upstream files (post-merge sweep) ==="
bin/rebrand-sync
bin/rebrand-check

echo ""
echo "============================================================"
echo "Sync of $TAG complete."
echo "Next steps:"
echo "  1. bundle install && yarn install"
echo "  2. Run tests: bundle exec rspec"
echo "  3. Tag: git tag wabosign-synced-with-$TAG"
echo "  4. Push: git push origin master --tags"
echo "============================================================"