#!/bin/bash

# Variablen
REPO="ssh://stefan@172.25.28.34:22/srv/usbplatte/nauheim1vps"
SOURCE="/home/stefan"

# Passphrase sicher aus Datei lesen
export BORG_PASSCOMMAND="cat /home/stefan/.config/borg/passphrase"
export GOTIFY_TOKEN=$(cat /home/stefan/.config/gotify/token)

EXCLUDES=(
    "/home/stefan/docker/privatebin"
    "/home/stefan/docker/psitransfer"
    "/home/stefan/docker/tautulli/config/cache/images"
    "/home/stefan/docker/resiliosync/sync"
    "/home/stefan/docker/resiliosync/cache"
    "/home/stefan/docker/komga/database.sqlite"
    "/home/stefan/docker/komga/logs"
    "/home/stefan/docker/komga/lucene"
    "/home/stefan/syncthing/sync"
)

BACKUP_NAME="backup-$(date +%Y-%m-%d_%H-%M-%S)"
GOTIFY_URL="https://gotify.nauheimtech.de"

# Funktion zum Senden einer Nachricht an Gotify
send_gotify_notification() {
    local message=$1
    local priority=$2
    curl -s -X POST "$GOTIFY_URL/message" \
        -H "X-Gotify-Key: $GOTIFY_TOKEN" \
        -d "title=Backup Fehler&message=$message&priority=$priority"
}

# Teste SSH-Verbindung
echo "===== Teste SSH-Verbindung: $(date) ====="
if ! ssh -o BatchMode=yes -o ConnectTimeout=10 stefan@172.25.28.34 "echo Verbindung erfolgreich"; then
    send_gotify_notification "Backup fehlgeschlagen: Keine SSH-Verbindung möglich" 10
    echo "FEHLER: Keine SSH-Verbindung möglich am $(date)"
    exit 1
fi

# Backup starten
echo "===== Backup gestartet: $(date) ====="
borg create --stats --progress "$REPO::$BACKUP_NAME" "$SOURCE" \
    $(printf -- '--exclude=%s ' "${EXCLUDES[@]}")
BACKUP_EXIT=$?

# Falls das Backup fehlschlägt, Nachricht an Gotify senden
if [ $BACKUP_EXIT -ne 0 ]; then
    send_gotify_notification "Backup fehlgeschlagen: $BACKUP_NAME" 10
    echo "FEHLER: Backup fehlgeschlagen ($BACKUP_NAME) am $(date)"
fi

# Alte Backups bereinigen
echo "===== Alte Backups bereinigen: $(date) ====="
borg prune --keep-hourly=12 --keep-daily=7 --keep-weekly=4 --keep-monthly=6 "$REPO"

echo "===== Backup abgeschlossen: $(date) ====="