#!/usr/bin/env bash
set -euo pipefail
# GCP Cloud Storage backup upload
# Uses: gsutil (gcloud SDK)
# Env: GCS_BUCKET (e.g. gs://my-bucket)

BACKUP_FILE="${1:?Usage: $0 <backup-file>}"
TIMESTAMP=$(date +%Y%m%d-%H%M%S)
KEY="gitea-dump-${TIMESTAMP}.zip"

echo "Uploading ${KEY}..."
gsutil cp "$BACKUP_FILE" "${GCS_BUCKET}/${KEY}"
echo "Upload complete."

# Prune backups older than 7 days — GCS lifecycle rules are preferred,
# but this works as a manual fallback
echo "Pruning backups older than 7 days..."
CUTOFF=$(date -d '7 days ago' +%Y-%m-%dT%H:%M:%SZ 2>/dev/null || date -v-7d +%Y-%m-%dT%H:%M:%SZ)
gsutil ls -l "${GCS_BUCKET}/" \
  | grep 'gitea-dump-' \
  | while read -r size date name; do
      if [[ "$date" < "$CUTOFF" ]]; then
        gsutil rm "$name" && echo "Deleted: ${name}"
      fi
    done
echo "Pruning complete."