"""Runtime supervision capability negotiation without pretending support."""

from __future__ import annotations

from dataclasses import asdict, dataclass
from datetime import datetime, timezone
from typing import Any


@dataclass(frozen=True)
class RuntimeCapabilities:
    canCancel: bool = False
    canPause: bool = False
    canResume: bool = False
    canRollback: bool = False
    canReduceAuthority: bool = False
    canQuarantine: bool = False


CAPABILITY_FOR_INTERVENTION = {
    "cancel": "canCancel",
    "pause": "canPause",
    "resume": "canResume",
    "roll_back": "canRollback",
    "reduce_authority": "canReduceAuthority",
    "quarantine": "canQuarantine",
}


def negotiate_intervention(intervention_id: str, intervention: str, requested_by: str, capabilities: RuntimeCapabilities) -> dict[str, Any]:
    capability = CAPABILITY_FOR_INTERVENTION.get(intervention)
    supported = bool(capability and getattr(capabilities, capability))
    return {
        "intervention_id": intervention_id,
        "type": intervention,
        "requested_by": requested_by,
        "status": "pending" if supported else "unsupported",
        "reason_code": "runtime_intervention_supported_pending_adapter" if supported else "runtime_intervention_unsupported",
        "required_capability": capability,
        "runtime_capabilities": asdict(capabilities),
        "timestamp": datetime.now(timezone.utc).isoformat().replace("+00:00", "Z"),
    }