Business Continuity

# disaster_recovery/sla_config.py
from dataclasses import dataclass
from enum import Enum
from typing import Dict

class ServiceTier(Enum):
    CRITICAL = "critical"      # Core API, Auth
    HIGH = "high"              # ML scoring, Analytics
    MEDIUM = "medium"          # Reporting, Batch jobs
    LOW = "low"                # Internal tools

@dataclass
class RecoveryTarget:
    service_tier: ServiceTier
    rto_minutes: int           # Recovery Time Objective
    rpo_minutes: int           # Recovery Point Objective
    mttr_minutes: int          # Mean Time To Recovery
    availability_target: float

# Recovery targets by service tier
RECOVERY_TARGETS: Dict[ServiceTier, RecoveryTarget] = {
    ServiceTier.CRITICAL: RecoveryTarget(
        service_tier=ServiceTier.CRITICAL,
        rto_minutes=15,          # Back online in 15 minutes
        rpo_minutes=1,           # Max 1 minute data loss
        mttr_minutes=10,         # Mean recovery time
        availability_target=0.9999  # 99.99% uptime (52.6 min/year)
    ),
    ServiceTier.HIGH: RecoveryTarget(
        service_tier=ServiceTier.HIGH,
        rto_minutes=30,
        rpo_minutes=5,
        mttr_minutes=20,
        availability_target=0.999   # 99.9% uptime (8.76 hrs/year)
    ),
    ServiceTier.MEDIUM: RecoveryTarget(
        service_tier=ServiceTier.MEDIUM,
        rto_minutes=60,
        rpo_minutes=15,
        mttr_minutes=45,
        availability_target=0.995   # 99.5% uptime (1.83 days/year)
    ),
    ServiceTier.LOW: RecoveryTarget(
        service_tier=ServiceTier.LOW,
        rto_minutes=240,
        rpo_minutes=60,
        mttr_minutes=120,
        availability_target=0.99    # 99% uptime (3.65 days/year)
    ),
}

# Service tier assignments
SERVICE_TIERS = {
    "api-gateway": ServiceTier.CRITICAL,
    "auth-service": ServiceTier.CRITICAL,
    "valuation-engine": ServiceTier.CRITICAL,
    "ml-scoring": ServiceTier.HIGH,
    "analytics-pipeline": ServiceTier.HIGH,
    "reporting-service": ServiceTier.MEDIUM,
    "batch-processor": ServiceTier.MEDIUM,
    "admin-portal": ServiceTier.LOW,
}