#!/bin/bash

# Monitor and restart metrics collector if it's not running
# This script checks if collect_metrics.php is running and restarts it if needed

SCRIPT_PATH="/var/www/html/bin/collect_metrics.php"
LOG_FILE="/var/log/metrics_monitor.log"
PID_FILE="/var/run/collect_metrics.pid"

log_message() {
    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" >> "$LOG_FILE"
}

# Check if the process is running
is_running() {
    if [ -f "$PID_FILE" ]; then
        PID=$(cat "$PID_FILE")
        if ps -p "$PID" > /dev/null 2>&1; then
            # Check if it's actually our script
            if ps -p "$PID" -o args= | grep -q "collect_metrics.php"; then
                return 0
            fi
        fi
    fi
    return 1
}

# Start the metrics collector
start_collector() {
    log_message "Starting metrics collector..."
    /usr/local/bin/php "$SCRIPT_PATH" >> /var/log/metrics_collector.log 2>&1 &
    echo $! > "$PID_FILE"
    log_message "Metrics collector started with PID: $(cat $PID_FILE)"
}

# Main logic
if is_running; then
    log_message "Metrics collector is running (PID: $(cat $PID_FILE))"
else
    log_message "Metrics collector is not running - starting it"
    start_collector
fi