#!/bin/bash

# Directory to monitor
TARGET_DIR="/etc/nginx/live/"

# Log file for tracking changes
LOG_FILE="/var/log/nginx_change_monitor.log"

# Function to check Nginx configuration and reload if valid
reload_nginx_if_valid() {
    echo "Checking Nginx configuration..." | tee -a "$LOG_FILE"
    if nginx -t &>> "$LOG_FILE"; then
        echo "Nginx configuration test successful. Reloading Nginx..." | tee -a "$LOG_FILE"
        nginx -s reload
    else
        echo "Nginx configuration test failed. No changes applied." | tee -a "$LOG_FILE"
    fi
}

# Monitor the directory for changes using inotifywait
echo "Starting Nginx change monitor for directory: $TARGET_DIR" | tee -a "$LOG_FILE"
inotifywait -m -r -e modify,create,delete --format '%w%f %e' "$TARGET_DIR" | while read FILE EVENT
do
    echo "Change detected in $FILE ($EVENT) at $(date)" | tee -a "$LOG_FILE"
    reload_nginx_if_valid
done