"""Idea138 GuardRailOps - Federated IR MVP (core primitives and orchestration scaffold)."""
from __future__ import annotations

from dataclasses import dataclass, field
from typing import Dict, List, Any
import hashlib
import time


@dataclass
class LocalIRTask:
    id: str
    description: str
    action: str  # e.g., 'detect', 'contain', 'recover'
    status: str  # 'pending'|'in_progress'|'completed'


@dataclass
class SharedTelemetry:
    signals: Dict[str, Any] = field(default_factory=dict)
    budget: float = 0.0  # privacy/telemetry budget placeholder
    timestamp: float = field(default_factory=time.time)


@dataclass
class PlanDelta:
    delta_id: str
    parent_id: str | None
    timestamp: float
    nonce: str
    changes: List[Dict[str, Any]]  # primitive changes describing actions

    def digest(self) -> str:
        hasher = hashlib.sha256()
        hasher.update(self.delta_id.encode())
        hasher.update(str(self.timestamp).encode())
        hasher.update((self.nonce or "").encode())
        for ch in self.changes:
            hasher.update(str(ch).encode())
        return hasher.hexdigest()


@dataclass
class AuditLogEntry:
    entry_id: str
    event: str
    detail: Dict[str, Any] = field(default_factory=dict)
    signature: str = ""  # placeholder signature

    def sign(self, key: str) -> None:
        data = f"{self.entry_id}:{self.event}:{self.detail}:{key}"
        self.signature = hashlib.sha256(data.encode()).hexdigest()


class DeltaSyncEngine:
    """Minimal offline delta synchronization engine (in-memory)."""

    def __init__(self) -> None:
        self.ledger: List[AuditLogEntry] = []

    def apply_delta(self, state: Dict[str, Any], delta: PlanDelta) -> Dict[str, Any]:
        # Simple deterministic application: iterate changes and update state
        new_state = dict(state)
        for change in delta.changes:
            # Each change should be a dict with 'key' and 'value' and optional 'op'
            key = change.get("key")
            value = change.get("value")
            op = change.get("op", "set")
            if op == "set":
                new_state[key] = value
            elif op == "delete":
                new_state.pop(key, None)
            elif op == "append":
                if key not in new_state:
                    new_state[key] = [value]
                else:
                    new_state[key].append(value)
        return new_state

    def log(self, event: str, detail: Dict[str, Any], signer_key: str | None = None) -> AuditLogEntry:
        entry = AuditLogEntry(entry_id=hashlib.sha256((event + str(time.time())).encode()).hexdigest(), event=event, detail=detail)
        if signer_key:
            entry.sign(signer_key)
        self.ledger.append(entry)
        return entry


__all__ = [
    "LocalIRTask",
    "SharedTelemetry",
    "PlanDelta",
    "AuditLogEntry",
    "DeltaSyncEngine",
]