#!/usr/bin/env bash
set -euo pipefail

# =============================================================================
# Gitea Backup Script for Dokploy
# =============================================================================
#
# Creates a database dump and file archive from the running Gitea containers.
#
# Usage:
#   chmod +x backup.sh
#   ./backup.sh
#   ./backup.sh /custom/backup/dir
#
# =============================================================================

# --- Configuration ---
GITEA_CONTAINER="gitea"
DB_CONTAINER="gitea-db"
DB_USER="gitea"
DB_NAME="gitea"

BACKUP_DIR="${1:-$HOME/gitea-backups}"
TIMESTAMP=$(date +%Y%m%d_%H%M%S)

mkdir -p "$BACKUP_DIR"

# --- Dump database ---
echo "=== Dumping database ==="
docker exec "$DB_CONTAINER" pg_dump \
  -U "$DB_USER" -d "$DB_NAME" \
  --no-owner --no-acl \
  -F c -f /tmp/gitea_db_backup.dump

docker cp "$DB_CONTAINER":/tmp/gitea_db_backup.dump "$BACKUP_DIR/gitea_db_${TIMESTAMP}.dump"
docker exec "$DB_CONTAINER" rm /tmp/gitea_db_backup.dump
echo "Database dumped to: $BACKUP_DIR/gitea_db_${TIMESTAMP}.dump"

# --- Backup files ---
echo ""
echo "=== Backing up Gitea files ==="
docker exec "$GITEA_CONTAINER" bash -c '
cd /data
tar czf /tmp/gitea_files_backup.tar.gz \
  git/repositories \
  git/lfs \
  gitea/avatars \
  gitea/attachments \
  git/.ssh \
  2>/dev/null || true
'

docker cp "$GITEA_CONTAINER":/tmp/gitea_files_backup.tar.gz "$BACKUP_DIR/gitea_files_${TIMESTAMP}.tar.gz"
docker exec "$GITEA_CONTAINER" rm /tmp/gitea_files_backup.tar.gz
echo "Files backed up to: $BACKUP_DIR/gitea_files_${TIMESTAMP}.tar.gz"

# --- Backup app.ini ---
echo ""
echo "=== Backing up app.ini ==="
docker cp "$GITEA_CONTAINER":/data/gitea/conf/app.ini "$BACKUP_DIR/app_${TIMESTAMP}.ini"
echo "Config backed up to: $BACKUP_DIR/app_${TIMESTAMP}.ini"

# --- Summary ---
echo ""
echo "=== Backup complete ==="
echo "Files:"
ls -lh "$BACKUP_DIR"/*"${TIMESTAMP}"*
echo ""
echo "To restore on a fresh Dokploy instance:"
echo "  1. Deploy the Gitea compose stack"
echo "  2. Copy the backup files to ~/  on the server"
echo "  3. Rename them to gitea_db_backup.dump, gitea_files_backup.tar.gz, app.ini"
echo "  4. Run ./restore.sh"