#!/bin/bash
# prepare-release.sh — prepare a release commit and tag (run on dev machine)
#
# Usage:
#   ./prepare-release.sh 1.0.0 "Release notes here..."
#
# This script:
#   1. Writes release notes to releases/v<version>.md
#   2. Updates packageVersion in build.gradle.kts
#   3. Commits both
#   4. Creates and pushes the annotated tag
#
# After this, the Mac operator runs ./release.sh to build and upload.

set -euo pipefail

if [ $# -lt 2 ]; then
    echo "Usage: $0 <version> <release-notes>"
    echo "  Example: $0 1.0.0 'First release with Android and iPhone support'"
    exit 1
fi

VERSION="$1"
TAG="v${VERSION}"
NOTES="$2"

# ── Pre-flight ────────────────────────────────────────────────────────────────
if ! git diff --quiet || ! git diff --cached --quiet; then
    echo "ERROR: Uncommitted changes. Commit or stash first."
    exit 1
fi

if git tag | grep -q "^${TAG}$"; then
    echo "ERROR: Tag $TAG already exists."
    exit 1
fi

# ── Write release notes ───────────────────────────────────────────────────────
mkdir -p releases
NOTES_FILE="releases/${TAG}.md"
cat > "$NOTES_FILE" << EOF
$NOTES
EOF
echo "→ Wrote $NOTES_FILE"

# ── Update version ────────────────────────────────────────────────────────────
sed -i "s/packageVersion = \"[^\"]*\"/packageVersion = \"${VERSION}\"/" build.gradle.kts
echo "→ Updated packageVersion to $VERSION"

# ── Commit ────────────────────────────────────────────────────────────────────
git add "$NOTES_FILE" build.gradle.kts
git commit -m "Release $TAG"
echo "→ Committed release files"

# ── Tag ───────────────────────────────────────────────────────────────────────
git tag -a "$TAG" -m "$NOTES"
echo "→ Created tag $TAG"

# ── Push ──────────────────────────────────────────────────────────────────────
echo "→ Pushing to origin..."
GIT_ASKPASS='' GIT_TERMINAL_PROMPT=0 git push origin HEAD:refs/heads/main 2>&1 || \
    echo "  (push to main may require running from Mac — tag is local)"
GIT_ASKPASS='' GIT_TERMINAL_PROMPT=0 git push origin "$TAG" 2>&1 || \
    echo "  (tag push may require running from Mac)"

echo ""
echo "✓ Release $TAG prepared."
echo "  On your Mac: git fetch --tags && git checkout $TAG && ./release.sh"