#!/bin/bash
# Gitea Backup Script
# Erstellt ein Backup der Gitea-Daten

set -e

BACKUP_DIR="/opt/gitea-backups"
DATE=$(date +%Y%m%d_%H%M%S)
BACKUP_NAME="gitea-backup-${DATE}.tar.gz"
RETENTION_DAYS=7

# Backup-Verzeichnis erstellen
mkdir -p "$BACKUP_DIR"

echo "=== Gitea Backup gestartet: $(date) ==="

# Docker Volume Pfad ermitteln
VOLUME_PATH=$(docker volume inspect gitea-data --format '{{ .Mountpoint }}')

if [ -z "$VOLUME_PATH" ]; then
    echo "Fehler: gitea-data Volume nicht gefunden!"
    exit 1
fi

# Gitea stoppen für konsistentes Backup
echo "Stoppe Gitea..."
cd /opt/gitea && docker compose stop gitea

# Backup erstellen
echo "Erstelle Backup: $BACKUP_NAME"
tar -czf "${BACKUP_DIR}/${BACKUP_NAME}" -C "$VOLUME_PATH" .

# Gitea wieder starten
echo "Starte Gitea..."
cd /opt/gitea && docker compose start gitea

# Alte Backups löschen
echo "Lösche Backups älter als ${RETENTION_DAYS} Tage..."
find "$BACKUP_DIR" -name "gitea-backup-*.tar.gz" -mtime +${RETENTION_DAYS} -delete

# Backup-Größe anzeigen
BACKUP_SIZE=$(du -h "${BACKUP_DIR}/${BACKUP_NAME}" | cut -f1)
echo "=== Backup abgeschlossen: ${BACKUP_NAME} (${BACKUP_SIZE}) ==="

# Optional: Backup zu externem Speicher kopieren (auskommentiert)
# rsync -av "${BACKUP_DIR}/${BACKUP_NAME}" user@backup-server:/backups/gitea/