"""
Network Conflict Monitor

Real-time network conflict detection and monitoring
"""

import logging
from typing import Dict, Any, List
from datetime import datetime

from .network_types import NetworkConflictAlert
from .network_intelligence_core import NetworkIntelligence

logger = logging.getLogger(__name__)


class NetworkConflictMonitor:
    """
    Real-time Network Conflict Detection and Monitoring
    """
    
    def __init__(self, network_intelligence: NetworkIntelligence):
        self.network_intelligence = network_intelligence
        self.active_alerts: Dict[str, NetworkConflictAlert] = {}
        self.monitoring_enabled = True
        
    def scan_for_conflicts(self, target_environment: str = "all") -> List[NetworkConflictAlert]:
        """Scan for network conflicts across infrastructure"""
        
        alerts = []
        
        # Get all current network allocations
        current_networks = self._discover_existing_networks(target_environment)
        
        # Check for overlapping CIDRs
        overlap_conflicts = self._detect_cidr_overlaps(current_networks)
        alerts.extend(overlap_conflicts)
        
        # Check for routing conflicts
        routing_conflicts = self._detect_routing_conflicts(current_networks)
        alerts.extend(routing_conflicts)
        
        # Check for security group conflicts
        security_conflicts = self._detect_security_group_conflicts(current_networks)
        alerts.extend(security_conflicts)
        
        # Update active alerts
        for alert in alerts:
            alert_id = f"{alert.conflict_type}_{hash(str(alert.conflicting_cidrs))}"
            self.active_alerts[alert_id] = alert
        
        return alerts
    
    def _discover_existing_networks(self, environment: str) -> List[Dict[str, Any]]:
        """Discover existing network configurations"""
        
        # In production, this would query cloud providers APIs
        # For now, return mock data structure
        return [
            {
                "provider": "aws",
                "region": "us-east-1", 
                "environment": "production",
                "vpc_id": "vpc-123456",
                "cidr": "10.0.0.0/16",
                "subnets": [
                    {"subnet_id": "subnet-111", "cidr": "10.0.1.0/24", "tier": "public"},
                    {"subnet_id": "subnet-222", "cidr": "10.0.2.0/24", "tier": "private"}
                ]
            }
        ]
    
    def _detect_cidr_overlaps(self, networks: List[Dict[str, Any]]) -> List[NetworkConflictAlert]:
        """Detect overlapping CIDR blocks"""
        
        alerts = []
        
        for i, net1 in enumerate(networks):
            for net2 in networks[i+1:]:
                conflict_result = self.network_intelligence.detect_cidr_conflicts(
                    net1["cidr"], 
                    [net2["cidr"]]
                )
                
                if conflict_result["has_conflicts"]:
                    alert = NetworkConflictAlert(
                        conflict_type="cidr_overlap",
                        severity="high",
                        affected_resources=[net1["vpc_id"], net2["vpc_id"]],
                        conflicting_cidrs=[net1["cidr"], net2["cidr"]],
                        impact_assessment="Network routing may be unpredictable",
                        recommended_actions=[
                            "Redesign CIDR allocation to eliminate overlap",
                            "Implement network segmentation",
                            "Consider VPC peering instead of overlapping ranges"
                        ],
                        auto_remediation_available=False,
                        detected_at=datetime.now()
                    )
                    alerts.append(alert)
        
        return alerts
    
    def _detect_routing_conflicts(self, networks: List[Dict[str, Any]]) -> List[NetworkConflictAlert]:
        """Detect routing table conflicts"""
        
        # Mock implementation - in production would analyze route tables
        return []
    
    def _detect_security_group_conflicts(self, networks: List[Dict[str, Any]]) -> List[NetworkConflictAlert]:
        """Detect security group rule conflicts"""
        
        # Mock implementation - in production would analyze security groups
        return []