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#!/bin/bash

# Directory to watch
WATCH_DIR="/mnt/user/data/Media/Comics"

# Command to execute when changes are detected
UPDATE_COMMAND="docker exec YACReaderLibraryServer YACReaderLibraryServer update-library /comics"

# Print startup message
echo "====================================="
echo "📂 Monitoring: $WATCH_DIR"
echo "🚫 Excluding: .yacreaderlibrary, .zzz_check, cbr2cbz"
echo "🔄 Triggering on: create, close_write, delete, move"
echo "⏳ Waiting 10 seconds after last event before updating..."
echo "🚀 Running in background..."
echo "====================================="

# Background timer process ID
TIMER_PID=""

# Function to trigger the update after a 10-second delay
trigger_update() {
    sleep 10  # Wait 10 seconds after the last event
    echo "🔄 Updating YACReader Library..."
    eval $UPDATE_COMMAND
    echo "✅ Update complete."
    echo "-------------------------------------"
    TIMER_PID=""  # Clear the PID after update runs
}

# Start monitoring in the background
inotifywait -m -r -e create,close_write,delete,move --timefmt '%Y-%m-%d %H:%M:%S' --format '%T | %w%f | %e' $WATCH_DIR --exclude '/\..+' |
while read -r timestamp file event; do
    echo "🔍 Change detected: [$timestamp] $file ($event)"

    # Kill previous timer if still running
    if [[ -n "$TIMER_PID" && -e "/proc/$TIMER_PID" ]]; then
        echo "🛑 Stopping previous timer (PID: $TIMER_PID)"
        kill "$TIMER_PID" 2>/dev/null
        wait "$TIMER_PID" 2>/dev/null
    fi

    # Start a new timer in the background
    trigger_update &  
    TIMER_PID=$!
    echo "⏳ New timer started (PID: $TIMER_PID)"
done