#!/bin/bash

# Usage: ./convert_bind_to_named_volume.sh <container_name> <bind_mount_path> <named_volume>
# Example: ./convert_bind_to_named_volume.sh mycontainer /data my_named_volume

set -e

CONTAINER="$1"
BIND_PATH="$2"
NAMED_VOL="$3"

if [[ -z "$CONTAINER" || -z "$BIND_PATH" || -z "$NAMED_VOL" ]]; then
    echo "Usage: $0 <container_name> <bind_mount_path> <named_volume>"
    exit 1
fi

# Create the named volume if it doesn't exist
docker volume create "$NAMED_VOL"

# Copy data from the bind mount to a temporary location
TMPDIR=$(mktemp -d)
docker cp "$CONTAINER:$BIND_PATH/." "$TMPDIR"

# Stop and remove the old container
docker stop "$CONTAINER"
docker rm "$CONTAINER"

# Start a temporary container to copy data into the named volume
docker run --rm -v "$NAMED_VOL":/vol -v "$TMPDIR":/from busybox sh -c "cp -a /from/. /vol/"

echo "Data copied to named volume: $NAMED_VOL"

echo "Now recreate your container, replacing:"
echo "  -v /host/path:$BIND_PATH"
echo "with:"
echo "  -v $NAMED_VOL:$BIND_PATH"

# Clean up
rm -rf "$TMPDIR"