#!/bin/bash

# Load environment variables from .env file
source .env

# Export Borg passphrase
export BORG_PASSPHRASE=$PASSPHRASE
export BORG_RSH="ssh -i $SSH_KEY -p $SSH_PORT"

# Build the list of existing directories
EXISTING_DIRECTORIES=$(for DIR in $SOURCE_DIRECTORIES; do
    if [ -d "$DIR" ]; then
        echo "$DIR"
    else
        echo "Directory does not exist: $DIR"
    fi
done)

# If we have valid directories, run the backup
if [ -n "$EXISTING_DIRECTORIES" ]; then
    echo "Backing up directories: $EXISTING_DIRECTORIES"
    sudo -E borg create --stats "$SERVER_USER@$SERVER_IP:$REPOSITORY::{hostname}-{now:%Y-%m-%d}" $EXISTING_DIRECTORIES
    if [ $? -ne 0 ]; then
        echo "Borg backup failed."
        exit 1
    fi
else
    echo "No valid directories to back up."
    exit 1
fi

# Prune old backups using a custom SSH port
borg prune --keep-daily=7 --keep-weekly=4 --keep-monthly=6 "$SERVER_USER@$SERVER_IP:$REPOSITORY"

if [ $? -ne 0 ]; then
    echo "Borg prune failed."
    exit 1
fi