#!/usr/bin/env bash

# Directory change notifier
# Requires: inotify-tools (inotifywait) and notify-send (libnotify)

# If the user supplied a directory, use it. Otherwise default to ~/Downloads.
DIR="${1:-$HOME/Downloads}"

# Resolve to an absolute path
DIR="$(realpath "$DIR" 2>/dev/null)"

# Validate directory exists
if [[ ! -d "$DIR" ]]; then
    echo "❌ Error: '$DIR' is not a valid directory."
    echo "Usage: $0 /path/to/directory"
    exit 1
fi

# Check dependency
if ! command -v inotifywait >/dev/null 2>&1; then
    echo "❌ Error: inotifywait (from inotify-tools) is required."
    exit 1
fi

echo "👀 Watching directory: $DIR"
echo "Press Ctrl+C to stop."
echo

# Watch for changes: created, deleted, modified
inotifywait -m -e create -e delete -e modify "$DIR" --format '%e %f' |
while read -r event file; do
    notify-send "📂 Directory Change" "$event: $file"
    echo "$(date '+%F %T')  $event  $file"
done