#!/usr/bin/env bash
# Build one complete release commit: version bump (or sync to a given
# version, or no bump at all), changelog entry, and refreshed README
# badges — all in a single commit, tagged at the end. Used by both the
# merge-to-master release job and the hand-pushed-tag sync job, so "the
# tag == a complete release commit" holds either way a release gets made.
#
# Usage: release-commit.sh [--no-bump|VERSION]
#   (no argument)  bump the current patch version (normal merge path).
#   --no-bump      don't touch the version — the branch already bumped it
#                   (e.g. a manual minor/major bump); just build the
#                   changelog/badge commit for whatever version is current.
#   VERSION        sync the project to this exact version (tag-sync path).
#
# Preconditions: repo is checked out with full history (fetch-depth: 0),
# `uv` is available and synced, and git user.name/user.email are configured.
# Idempotent: if the resulting tag already exists, this is a no-op.
set -euo pipefail

VERSION_ARG="${1:-}"

if [ "$VERSION_ARG" = "--no-bump" ]; then
  echo "Version already bumped by this branch; using current version as-is"
elif [ -n "$VERSION_ARG" ]; then
  echo "Syncing project version to $VERSION_ARG"
  uv version "$VERSION_ARG" --no-sync
  uv lock
else
  CURRENT_VERSION=$(uv version --short)
  echo "Bumping patch version from $CURRENT_VERSION"
  uv run bump-my-version bump patch --current-version "$CURRENT_VERSION" --no-commit --no-tag
  # bump-my-version's pre_commit_hooks (uv lock + git add uv.lock) only run
  # on its own commit path, which we skipped with --no-commit — so do it here.
  uv lock
fi

VERSION=$(uv version --short)
TAG="v$VERSION"

if git rev-parse "$TAG" >/dev/null 2>&1; then
  echo "Tag $TAG already exists; nothing to do"
  exit 0
fi

uv run git-cliff --tag "$TAG" --unreleased --prepend CHANGELOG.md

TEST_COUNT=$(uv run pytest --collect-only -q 2>/dev/null | grep -oE '^[0-9]+ tests? collected' | grep -oE '^[0-9]+')
sed -i -E "s|badge/version-[^-]+-informational|badge/version-${VERSION}-informational|" README.md
sed -i -E "s|badge/tests-[0-9]+%20passing-brightgreen|badge/tests-${TEST_COUNT}%20passing-brightgreen|" README.md

# .bumpversion.toml stores its own current_version, which bump-my-version
# rewrites even with --no-commit — must be staged or the next run sees a
# dirty tree and bump-my-version refuses (allow_dirty = false).
git add pyproject.toml .bumpversion.toml uv.lock CHANGELOG.md README.md
if git diff --cached --quiet; then
  echo "Nothing changed; skipping release commit"
  exit 0
fi

git commit -m "chore: release $TAG"
git tag -a "$TAG" -m "$TAG"

echo "Created release commit and tag $TAG"