# Backup info
export BACKUP_DRIVE_UUID={{ disk.uuid }}
export BACKUP_DRIVE_PASSWORD={{ disk.password }}
export BACKUP_DRIVE_NAME=luks-$BACKUP_DRIVE_UUID
export BACKUP_DRIVE_MNT=/mnt/$BACKUP_DRIVE_NAME

# For notifications
export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/{{ notifications.user.uid }}/bus
export USER={{ notifications.user.name }}

function log {
    LEVEL=$1
    MESSAGE=$2
    echo "$LEVEL: $MESSAGE"
}

# Unlock backup drive
if [ -L /dev/disk/by-uuid/$BACKUP_DRIVE_UUID ]; then
    cryptsetup luksOpen /dev/disk/by-uuid/$BACKUP_DRIVE_UUID $BACKUP_DRIVE_NAME --key-file=$BACKUP_DRIVE_PASSWORD
    cryptsetup status /dev/mapper/$BACKUP_DRIVE_NAME
else
    log "ERROR" "Drive $BACKUP_DRIVE_UUID could not be found."
    exit 1
fi

if [ $? = 0 ]; then
    log "INFO" "Drive $BACKUP_DRIVE_UUID unlocked"
else
    log "ERROR" "Drive $BACKUP_DRIVE_UUID could not be unlocked."
    exit 1
fi

# Create /mnt/uuid
log "INFO" "Creating $BACKUP_DRIVE_NAME"
mkdir -p $BACKUP_DRIVE_MNT

# Mount /mnt/uuid
log "INFO" "Mounting /dev/mapper/$BACKUP_DRIVE_NAME"
mount -t btrfs -o compress=zstd /dev/mapper/$BACKUP_DRIVE_NAME $BACKUP_DRIVE_MNT

if [ $? = 0 ]; then
    log "INFO" "Drive $BACKUP_DRIVE_UUID mounted at $BACKUP_DRIVE_MNT"
    exit 0
else
    log "ERROR" "Drive $BACKUP_DRIVE_NAME could not be mounted."
    exit 1
fi