#!/bin/bash
set -euo pipefail

# Where this script lives (Forgejo project root)
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
cd "$SCRIPT_DIR"

BACKUP_DIR="$SCRIPT_DIR/backup"
TIMESTAMP="$(date +%Y-%m-%d_%H-%M-%S)"
BACKUP_FILE="$BACKUP_DIR/forgejo-backup-${TIMESTAMP}.tar.gz"

echo "=== Forgejo backup ==="
echo "Project dir : $SCRIPT_DIR"
echo "Backup dir  : $BACKUP_DIR"
echo "Backup file : $BACKUP_FILE"
echo

# 1) Ensure backup dir exists
mkdir -p "$BACKUP_DIR"

# 2) Stop Forgejo (short downtime, but consistent backup)
echo "[1/3] Stopping Forgejo containers..."
docker compose down

# 3) Create archive of data + config
#    Adjust the list if you add more config files
echo "[2/3] Creating backup archive..."
tar -czf "$BACKUP_FILE" \
  forgejo \
  docker-compose.yml \
  .gitignore \
  README.md \
  .git 2>/dev/null || true  # ignore .git if it causes trouble

echo "[OK] Backup created: $BACKUP_FILE"

# 4) Start Forgejo again
echo "[3/3] Starting Forgejo containers..."
docker compose up -d

echo "=== Done ==="

# 5) Optional: keep only last 7 backups, delete older ones
echo "Cleaning up old backups (keep last 7)..."
ls -1t "$BACKUP_DIR"/forgejo-backup-*.tar.gz 2>/dev/null | tail -n +8 | xargs -r rm -f

echo "Backup finished successfully."