#!/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 ==="

# -----------------------------
# 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 "$TAG"; then
  echo "Tag already exists on remote"
  exit 1
fi

# -----------------------------
# Update versions.env
# -----------------------------
echo "Updating versions.env"

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

# -----------------------------
# Optional changelog entry
# -----------------------------
if [ -f CHANGELOG.md ]; then
  echo "Updating CHANGELOG.md"
  DATE=$(date +%Y-%m-%d)
  sed -i "1i ## $VERSION - $DATE\n- release\n" CHANGELOG.md
  git add CHANGELOG.md
fi

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

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

echo -e "\n## $VERSION\n" | cat - RELEASE_NOTES.tmp >> CHANGELOG.md
rm RELEASE_NOTES.tmp

# -----------------------------
# Commit version bump
# -----------------------------
git add versions.env
git commit -m "release: $VERSION"

# -----------------------------
# Push main → triggers 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 → triggers release build
# -----------------------------
git push origin "$TAG"

echo "Tag pushed — release build triggered"

# -----------------------------
# Optional: wait for CI success
# -----------------------------
if [ -n "$GITEA_TOKEN" ]; then
  echo "Checking CI status..."

  REPO=$(git config --get remote.origin.url | sed 's#.*/##; s/.git$//')
  OWNER=$(git config --get remote.origin.url | awk -F'[:/]' '{print $(NF-1)}')

  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?event=push" \
      | jq -r '.workflow_runs[0].status')

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

echo "=== Release complete ==="