"""
Microservices Architecture for Secure Ticketing Platform
Author: Starlight Agent
Version: 1.0
"""

import json
import hashlib
import datetime
from typing import Dict, List, Optional, Any
from dataclasses import dataclass, asdict
from collections import defaultdict

@dataclass
class ServiceConfig:
    """Configuration for microservice"""
    name: str
    port: int
    replicas: int
    health_check: str
    dependencies: List[str]

class MicroservicesArchitecture:
    """Design and manage microservices architecture"""
    
    def __init__(self):
        self.services = {}
        self.service_mesh = {}
        self.load_balancer = {}
        
    def design_architecture(self) -> Dict[str, Any]:
        """Design complete microservices architecture"""
        
        # Core services definition
        services = {
            "api-gateway": ServiceConfig(
                name="api-gateway",
                port=8080,
                replicas=3,
                health_check="/health",
                dependencies=["auth-service", "ticket-service"]
            ),
            "auth-service": ServiceConfig(
                name="auth-service", 
                port=8081,
                replicas=2,
                health_check="/health",
                dependencies=["user-db"]
            ),
            "ticket-service": ServiceConfig(
                name="ticket-service",
                port=8082, 
                replicas=4,
                health_check="/health",
                dependencies=["ticket-db", "pricing-service", "blockchain-verifier"]
            ),
            "pricing-service": ServiceConfig(
                name="pricing-service",
                port=8083,
                replicas=2,
                health_check="/health", 
                dependencies=["analytics-db"]
            ),
            "fraud-detection": ServiceConfig(
                name="fraud-detection",
                port=8084,
                replicas=3,
                health_check="/health",
                dependencies=["ml-models", "transaction-db"]
            ),
            "blockchain-verifier": ServiceConfig(
                name="blockchain-verifier",
                port=8085,
                replicas=2,
                health_check="/health",
                dependencies=["blockchain-node"]
            ),
            "payment-service": ServiceConfig(
                name="payment-service",
                port=8086,
                replicas=3,
                health_check="/health",
                dependencies=["payment-gateway", "transaction-db"]
            ),
            "notification-service": ServiceConfig(
                name="notification-service",
                port=8087,
                replicas=2,
                health_check="/health",
                dependencies=["queue-service"]
            )
        }
        
        # Service mesh configuration
        service_mesh = {
            "discovery": "consul",
            "routing": "envoy", 
            "security": "mtls",
            "observability": {
                "metrics": "prometheus",
                "tracing": "jaeger",
                "logging": "elasticsearch"
            }
        }
        
        # Load balancing strategy
        load_balancer = {
            "algorithm": "round_robin",
            "health_checks": {
                "interval": 30,
                "timeout": 5,
                "unhealthy_threshold": 3,
                "healthy_threshold": 2
            },
            "circuit_breaker": {
                "enabled": True,
                "threshold": 5,
                "timeout": 60
            }
        }
        
        return {
            "services": {k: asdict(v) for k, v in services.items()},
            "service_mesh": service_mesh,
            "load_balancer": load_balancer,
            "scalability_rules": self._define_scalability_rules(),
            "security_layers": self._define_security_layers()
        }
    
    def _define_scalability_rules(self) -> Dict[str, Any]:
        """Define auto-scaling rules"""
        return {
            "ticket-service": {
                "cpu_threshold": 70,
                "memory_threshold": 80,
                "min_replicas": 2,
                "max_replicas": 10,
                "scale_up_cooldown": 300,
                "scale_down_cooldown": 600
            },
            "fraud-detection": {
                "cpu_threshold": 60,
                "memory_threshold": 75,
                "min_replicas": 2,
                "max_replicas": 8,
                "scale_up_cooldown": 180,
                "scale_down_cooldown": 300
            }
        }
    
    def _define_security_layers(self) -> Dict[str, Any]:
        """Define security layers"""
        return {
            "network_security": {
                "firewall": "enabled",
                "ddos_protection": "enabled",
                "rate_limiting": {
                    "requests_per_minute": 1000,
                    "burst_size": 200
                }
            },
            "application_security": {
                "authentication": "oauth2+jwt",
                "authorization": "rbac",
                "input_validation": "strict",
                "encryption": "aes256"
            },
            "data_security": {
                "encryption_at_rest": "enabled",
                "encryption_in_transit": "tls1.3",
                "data_masking": "pii_fields"
            }
        }

def test_architecture():
    """Test architecture design"""
    arch = MicroservicesArchitecture()
    design = arch.design_architecture()
    
    # Verify services
    assert len(design["services"]) == 8
    assert "api-gateway" in design["services"]
    assert "fraud-detection" in design["services"]
    
    # Verify security layers
    assert "network_security" in design["security_layers"]
    assert "application_security" in design["security_layers"]
    
    print("✅ Architecture design validated")
    return design

if __name__ == "__main__":
    result = test_architecture()
    print(f"Architecture designed with {len(result['services'])} microservices")