from timesketch.lib.analyzers import interface
from timesketch.lib.analyzers import manager
import requests
import json
import ipaddress
import os

class ShodanEnrichmentAnalyzer(interface.BaseAnalyzer):
    """Analyzer to enrich IP addresses with Shodan data."""
    
    NAME = 'shodan_enrichment'
    DISPLAY_NAME = 'Shodan IP Enrichment'
    DESCRIPTION = 'Enriches source IP addresses with Shodan historical data'
    
    def __init__(self, index_name, sketch_id, timeline_id=None):
        super().__init__(index_name, sketch_id, timeline_id)
        self.shodan_api_key = os.environ.get('SHODAN_API_KEY', '')
        self.processed_ips = set()  # Track processed IPs to avoid duplicates
    
    def run(self):
        """Main analyzer logic."""
        if not self.shodan_api_key:
            return "Shodan API key not configured"
            
        # Query for events with source_ip that haven't been processed
        query = {
            'query': {
                'bool': {
                    'must': [
                        {'exists': {'field': 'source_ip'}}
                    ],
                    'must_not': [
                        {'exists': {'field': 'shodan_org'}}  # Skip if already enriched
                    ]
                }
            }
        }
        
        events = self.event_stream(query_dsl=query, return_fields=['source_ip'])
        processed_count = 0
        skipped_count = 0
        
        for event in events:
            source_ip = event.source.get('source_ip')
            
            if source_ip:
                # Skip if we've already processed this IP in this run
                if source_ip in self.processed_ips:
                    skipped_count += 1
                    continue
                    
                if self._is_public_ip(source_ip):
                    print(f"Processing new IP: {source_ip}")
                    self.processed_ips.add(source_ip)
                    
                    shodan_data = self._get_shodan_data(source_ip)
                    if shodan_data:
                        self._enrich_event(event, shodan_data)
                        processed_count += 1
                        print(f"✅ Enriched {source_ip} with Shodan data")
                    else:
                        # Still mark as processed even if no data found
                        self._mark_as_processed(event)
                        
                    # Rate limiting
                    import time
                    time.sleep(1)
                else:
                    print(f"Skipping private IP: {source_ip}")
        
        return f"Processed {processed_count} IPs, skipped {skipped_count} duplicates"
    
    def _get_shodan_data(self, ip):
        """Fetch Shodan data for IP."""
        try:
            url = f"https://api.shodan.io/shodan/host/{ip}"
            params = {'key': self.shodan_api_key}
            
            print(f"🔍 Querying Shodan for: {ip}")
            response = requests.get(url, params=params, timeout=10)
            
            if response.status_code == 200:
                print(f"📊 Found Shodan data for {ip}")
                return response.json()
            elif response.status_code == 404:
                print(f"❌ No Shodan data for {ip}")
                return None
            else:
                print(f"⚠️ Shodan API error for {ip}: {response.status_code}")
                return None
                
        except Exception as e:
            print(f"💥 Error fetching Shodan data for {ip}: {e}")
            return None
    
    def _enrich_event(self, event, shodan_data):
        """Add Shodan data to the event."""
        try:
            enrichment = {
                'shodan_org': shodan_data.get('org', ''),
                'shodan_isp': shodan_data.get('isp', ''),
                'shodan_country': shodan_data.get('location', {}).get('country_name', ''),
                'shodan_city': shodan_data.get('location', {}).get('city', ''),
                'shodan_ports': shodan_data.get('ports', []),
                'shodan_hostnames': shodan_data.get('hostnames', []),
                'shodan_last_update': shodan_data.get('last_update', ''),
            }
            
            # Add top services
            if shodan_data.get('data'):
                services = []
                for service in shodan_data.get('data', [])[:3]:  # Top 3 services
                    port = service.get('port', 'Unknown')
                    product = service.get('product', 'Unknown')
                    services.append(f"{port}/{product}")
                enrichment['shodan_services'] = services
            
            event.add_attributes(enrichment)
            event.add_tags(['shodan-enriched'])
            event.commit()
            
        except Exception as e:
            print(f"💥 Error enriching event: {e}")
    
    def _mark_as_processed(self, event):
        """Mark event as processed even if no Shodan data found."""
        try:
            event.add_attributes({'shodan_checked': True})
            event.commit()
        except Exception:
            pass
    
    def _is_public_ip(self, ip):
        """Check if IP is public."""
        try:
            ip_obj = ipaddress.ip_address(ip)
            return ip_obj.is_global
        except (ValueError, ipaddress.AddressValueError):
            return False

# Register the analyzer
manager.AnalysisManager.register_analyzer(ShodanEnrichmentAnalyzer)