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

TARGET_DIR="${1:?target dir required}"
STAGE="${2:-production}"

BACKEND_DIR="$TARGET_DIR/backend"
CURRENT_LINK="/opt/yourpart"
CURRENT_BACKEND="$CURRENT_LINK/backend"
DATA_DIR="/opt/yourpart-data"

echo "Updating YourPart Backend..."
echo "Ziel: $BACKEND_DIR"
echo "Using STAGE: $STAGE"
echo "NOTE: .env files will NOT be overwritten"

cd "$BACKEND_DIR"

echo "Lösche alle generierten Verzeichnisse..."
rm -rf node_modules/.cache/
rm -rf logs/
rm -rf tmp/

echo "Installing dependencies..."
npm ci --production

TEMP_ENV_DIR="/tmp/yourpart-env-backup-$$"
mkdir -p "$TEMP_ENV_DIR"

echo "Sichere .env-Dateien aus $CURRENT_BACKEND..."
if [ -d "$CURRENT_BACKEND" ]; then
    find "$CURRENT_BACKEND" -maxdepth 1 -name '.env*' -type f -exec cp {} "$TEMP_ENV_DIR/" \; 2>/dev/null || true
    if [ "$(ls -A "$TEMP_ENV_DIR" 2>/dev/null)" ]; then
        echo "✓ .env-Dateien gesichert: $(ls "$TEMP_ENV_DIR")"
        cp "$TEMP_ENV_DIR"/.env* "$BACKEND_DIR"/ 2>/dev/null || true
    else
        echo "⚠ Keine .env-Dateien in $CURRENT_BACKEND gefunden"
    fi
fi

sudo -n mkdir -p "$DATA_DIR/adult-verification"

if [ -f "$BACKEND_DIR/.env" ]; then
    echo "✓ .env-Datei ist vorhanden"
else
    echo "⚠ WARNUNG: Keine .env-Datei in $BACKEND_DIR gefunden!"
fi

echo "Setting permissions..."
sudo -n chown -R yourpart:yourpart "$BACKEND_DIR"
sudo -n chmod -R 755 "$BACKEND_DIR"
sudo -n chown -R yourpart:yourpart "$DATA_DIR"
sudo -n chmod -R 755 "$DATA_DIR"

if [ -f "$BACKEND_DIR/.env" ]; then
    sudo -n chmod 600 "$BACKEND_DIR/.env"
fi

echo "Updating systemd service..."
sudo -n cp "$TARGET_DIR/yourpart.service" /etc/systemd/system/
sudo -n systemctl daemon-reload

echo "Running database synchronization..."
cd "$BACKEND_DIR"
export STAGE="$STAGE"
npm run sync-db

echo "Backend update completed!"
rm -rf "$TEMP_ENV_DIR"