#!/usr/bin/env bash
set -e

VERSION="$1"

if [ -z "$VERSION" ]; then
echo "Usage: ./release.sh <semver>"
echo "Example: ./release.sh 1.4.0"
exit 1
fi

# -----------------------------

# SemVer validation

# -----------------------------

if ! [[ "$VERSION" =~ ^[0-9]+.[0-9]+.[0-9]+$ ]]; then
echo "Version must be SemVer: X.Y.Z"
exit 1
fi

TAG="v$VERSION"

echo "=== Release $TAG ==="

# -----------------------------

# portable sed

# -----------------------------

sedi() {
if sed --version >/dev/null 2>&1; then
sed -i "$@"
else
sed -i '' "$@"
fi
}

# -----------------------------

# Branch check

# -----------------------------

BRANCH=$(git rev-parse --abbrev-ref HEAD)
if [ "$BRANCH" != "main" ]; then
echo "Not on main branch"
exit 1
fi

# -----------------------------

# Working tree clean?

# -----------------------------

if ! git diff --quiet; then
echo "Working tree not clean — commit first"
exit 1
fi

# -----------------------------

# Sync with remote

# -----------------------------

git fetch origin

LOCAL=$(git rev-parse main)
REMOTE=$(git rev-parse origin/main)

if [ "$LOCAL" != "$REMOTE" ]; then
echo "Local main not in sync with origin/main"
exit 1
fi

# -----------------------------

# Tag already exists?

# -----------------------------

if git rev-parse "$TAG" >/dev/null 2>&1; then
echo "Tag already exists locally"
exit 1
fi

if git ls-remote --tags origin | grep -q "refs/tags/$TAG"; then
echo "Tag already exists on remote"
exit 1
fi

# -----------------------------

# versions.env update

# -----------------------------

if [ ! -f versions.env ]; then
echo "versions.env not found"
exit 1
fi

echo "Updating versions.env"

if grep -q "^APP_VERSION=" versions.env; then
sedi "s/^APP_VERSION=.*/APP_VERSION=${VERSION}/" versions.env
else
echo "APP_VERSION=${VERSION}" >> versions.env
fi

# -----------------------------

# CHANGELOG generation

# -----------------------------

if [ -f CHANGELOG.md ]; then
echo "Updating CHANGELOG.md"

LAST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || true)

if [ -n "$LAST_TAG" ]; then
git log $LAST_TAG..HEAD --pretty=format:"- %s" > RELEASE_NOTES.tmp
else
git log --pretty=format:"- %s" > RELEASE_NOTES.tmp
fi

DATE=$(date +%Y-%m-%d)

{
echo "## $VERSION - $DATE"
cat RELEASE_NOTES.tmp
echo
cat CHANGELOG.md
} > CHANGELOG.new

mv CHANGELOG.new CHANGELOG.md
rm RELEASE_NOTES.tmp

git add CHANGELOG.md
fi

# -----------------------------

# Commit version bump

# -----------------------------

git add versions.env
git commit -m "release: $VERSION"

# -----------------------------

# Push main → edge build

# -----------------------------

git push origin main
echo "Main pushed — edge build will run"

# -----------------------------

# Create annotated tag

# -----------------------------

git tag -a "$TAG" -m "Release $TAG"

# -----------------------------

# Push tag → release build

# -----------------------------

git push origin "$TAG"
echo "Tag pushed — release build triggered"

# -----------------------------

# Optional CI wait

# -----------------------------

if [ -n "$GITEA_TOKEN" ]; then
echo "Checking CI status..."

URL=$(git config --get remote.origin.url)
REPO=$(basename "$URL" .git)
OWNER=$(basename "$(dirname "$URL")")

for i in {1..30}; do
STATUS=$(curl -s 
-H "Authorization: token $GITEA_TOKEN" 
"[https://git.pi-farm.de/api/v1/repos/$OWNER/$REPO/actions/runs](https://git.pi-farm.de/api/v1/repos/$OWNER/$REPO/actions/runs)" 
| jq -r '.workflow_runs[0].status // empty')

```
echo "CI status: $STATUS"
[ "$STATUS" = "success" ] && break
sleep 5
```

done
fi

echo "=== Release complete ==="