#!/bin/bash

set -Eeuo pipefail

APP_DIR="/opt/picpeak"
BACKUP_DIR="/root/picpeak-backups"
LOG_FILE="/var/log/picpeak-update.log"
RETENTION_DAYS=30

DATE=$(date +"%Y-%m-%d_%H-%M-%S")

mkdir -p "$BACKUP_DIR"

exec > >(tee -a "$LOG_FILE") 2>&1

echo ""
echo "================================================="
echo " PicPeak Update gestartet: $DATE"
echo "================================================="

cd "$APP_DIR"

# Git Safe Directory
git config --global --add safe.directory "$APP_DIR" >/dev/null 2>&1 || true

# Prüfungen
[ -d ".git" ] || { echo "FEHLER: Kein Git Repository"; exit 1; }

echo ""
echo "1. Dateibackup erstellen..."

tar -czf \
"$BACKUP_DIR/picpeak-files-$DATE.tar.gz" \
"$APP_DIR"

echo "OK"

echo ""
echo "2. Datenbank sichern..."

DB_USER=$(grep '^DB_USER=' .env | cut -d= -f2)
DB_NAME=$(grep '^DB_NAME=' .env | cut -d= -f2)

docker exec picpeak-postgres \
pg_dump -U "$DB_USER" "$DB_NAME" \
> "$BACKUP_DIR/picpeak-db-$DATE.sql"

echo "OK"

echo ""
echo "3. Git Update..."

git pull

echo "OK"

echo ""
echo "4. Docker Images neu bauen..."

docker compose build --no-cache

echo "OK"

echo ""
echo "5. Container starten..."

docker compose up -d

echo "OK"

echo ""
echo "6. Healthcheck..."

sleep 20

docker compose ps

if docker compose ps | grep -q unhealthy; then
    echo "FEHLER: Mindestens ein Container unhealthy"
    exit 1
fi

echo "OK"

echo ""
echo "7. Alte Docker Images bereinigen..."

docker image prune -f

echo "OK"

echo ""
echo "8. Alte Backups löschen (> $RETENTION_DAYS Tage)..."

find "$BACKUP_DIR" -type f -mtime +$RETENTION_DAYS -delete

echo "OK"

echo ""
echo "================================================="
echo " Update erfolgreich abgeschlossen"
echo "================================================="
echo ""

echo "Aktive Container:"
docker compose ps

echo ""
echo "Neueste Backups:"
ls -lh "$BACKUP_DIR" | tail -10