from __future__ import annotations

from dataclasses import dataclass, field
from typing import List, Dict, Optional


@dataclass
class SignalNode:
    asset: str
    venue: str
    signal_type: str
    timestamp: int  # epoch seconds
    quality: float = 0.0
    metadata: Dict[str, object] = field(default_factory=dict)


@dataclass
class Edge:
    from_id: str
    to_id: str
    relation: str  # e.g., "causal", "temporal"
    timestamp: int
    metadata: Dict[str, object] = field(default_factory=dict)


@dataclass
class Scenario:
    id: str
    nodes: List[str] = field(default_factory=list)
    edges: List[str] = field(default_factory=list)
    description: str = ""
    version: int = 1


@dataclass
class HedgePlan:
    id: str
    delta: Dict[str, object]  # minimal representation of hedging actions
    version: int = 1
    approvals: List[str] = field(default_factory=list)


@dataclass
class AuditLog:
    entry: str
    timestamp: int
    actor: Optional[str] = None


@dataclass
class PrivacyBudget:
    signal_id: str
    budget: float  # DP budget allocated per signal
    policy: Dict[str, object] = field(default_factory=dict)


@dataclass
class RegistryEntry:
    adapter_name: str
    contract: Dict[str, object]
    conformance: bool = False