#!/usr/bin/env python3
"""
Time verification script for USDA Vision Camera System
Checks if system time is properly synchronized
"""

import datetime
import pytz
import requests
import json

def check_system_time():
    """Check system time against multiple sources"""
    print("🕐 USDA Vision Camera System - Time Verification")
    print("=" * 50)
    
    # Get local time
    local_time = datetime.datetime.now()
    utc_time = datetime.datetime.utcnow()
    
    # Get Atlanta timezone
    atlanta_tz = pytz.timezone('America/New_York')
    atlanta_time = datetime.datetime.now(atlanta_tz)
    
    print(f"Local system time: {local_time}")
    print(f"UTC time: {utc_time}")
    print(f"Atlanta time: {atlanta_time}")
    print(f"Timezone: {atlanta_time.tzname()}")
    
    # Check against multiple time APIs for reliability
    time_apis = [
        {
            "name": "WorldTimeAPI",
            "url": "http://worldtimeapi.org/api/timezone/America/New_York",
            "parser": lambda data: datetime.datetime.fromisoformat(data['datetime'].replace('Z', '+00:00'))
        },
        {
            "name": "WorldClockAPI",
            "url": "http://worldclockapi.com/api/json/est/now",
            "parser": lambda data: datetime.datetime.fromisoformat(data['currentDateTime'])
        }
    ]

    for api in time_apis:
        try:
            print(f"\n🌐 Checking against {api['name']}...")
            response = requests.get(api['url'], timeout=5)
            if response.status_code == 200:
                data = response.json()
                api_time = api['parser'](data)

                # Compare times (allow 5 second difference)
                time_diff = abs((atlanta_time.replace(tzinfo=None) - api_time.replace(tzinfo=None)).total_seconds())

                print(f"API time: {api_time}")
                print(f"Time difference: {time_diff:.2f} seconds")

                if time_diff < 5:
                    print("✅ Time is synchronized (within 5 seconds)")
                    return True
                else:
                    print("❌ Time is NOT synchronized (difference > 5 seconds)")
                    return False
            else:
                print(f"⚠️  {api['name']} returned status {response.status_code}")
                continue
        except Exception as e:
            print(f"⚠️  Error checking {api['name']}: {e}")
            continue

    print("⚠️  Could not reach any time API services")
    print("⚠️  This may be due to network connectivity issues")
    print("⚠️  System will continue but time synchronization cannot be verified")
    return None

if __name__ == "__main__":
    check_system_time()