#!/usr/bin/env bash
# =============================================================================
# migrate-media.sh
# Migrates user-uploaded media files from host bind-mount (eVibes / early Schon)
# into the new Docker-managed named volume (media-data).
#
# Run this ONCE after upgrading from an eVibes or pre-volume Schon instance.
# =============================================================================
set -euo pipefail

HOST_MEDIA="$(pwd)/media"

echo "Schon — media migration from host bind-mount → named volume"
echo ""

if [ ! -d "$HOST_MEDIA" ]; then
  echo "No ./media directory found on host. Nothing to migrate."
  exit 0
fi

FILE_COUNT=$(find "$HOST_MEDIA" -type f | wc -l | tr -d ' ')
if [ "$FILE_COUNT" -eq 0 ]; then
  echo "Host ./media directory is empty. Nothing to migrate."
  exit 0
fi

echo "Found $FILE_COUNT file(s) in $HOST_MEDIA"
echo ""
echo "This will copy them into the Docker named volume 'media-data'."
read -rp "Continue? [y/N] " confirm
if [ "$confirm" != "y" ] && [ "$confirm" != "Y" ]; then
  echo "Migration cancelled."
  exit 0
fi

echo ""
echo "Copying files..."
docker compose run --rm \
  -v "$HOST_MEDIA":/old_media:ro \
  app bash -c "
    cp -a /old_media/. /app/media/
    COUNT=\$(find /app/media -type f | wc -l)
    echo \"Migration complete: \$COUNT file(s) now in media volume.\"
  "

echo ""
echo "Done. You can safely ignore the host ./media directory — it is no longer used."
echo "To remove it: rm -rf ./media"