"""Actions API for unified Agent Event Bus."""

from __future__ import annotations

from typing import Any

try:
    from fastapi import APIRouter
except Exception:
    APIRouter = None

from .agent_event_bus import AgentEventBus

bus = AgentEventBus()


def create_agent_event(payload: dict[str, Any]) -> dict[str, Any]:
    return {"status": "ok", "event": bus.publish(**payload)}


def list_agent_events(kind: str | None = None, status: str = "pending") -> dict[str, Any]:
    return {"status": "ok", "events": bus.list_events(kind, status)}


def get_agent_event(event_id: str) -> dict[str, Any]:
    return {"status": "ok", "event": bus.get(event_id)}


def transition_agent_event(event_id: str, status: str, actor: str = "system") -> dict[str, Any]:
    return {"status": "ok", "event": bus.transition(event_id, status, actor)}


def agent_event_stats() -> dict[str, Any]:
    return {"status": "ok", "stats": bus.stats()}


# Compatibility adapters

def list_gpt_inbox_messages():
    return list_agent_events(kind="gpt_inbox")


def ack_gpt_inbox_message(event_id: str):
    return transition_agent_event(event_id, "completed", "custom-gpt")


def build_router():
    if APIRouter is None:
        return None
    router = APIRouter(prefix="/agent-events", tags=["agent-events"])

    @router.post("", operation_id="createAgentEvent")
    def create(payload: dict[str, Any]):
        return create_agent_event(payload)

    @router.get("", operation_id="listAgentEvents")
    def listing(kind: str | None = None, status: str = "pending"):
        return list_agent_events(kind, status)

    @router.get("/{event_id}", operation_id="getAgentEvent")
    def get(event_id: str):
        return get_agent_event(event_id)

    @router.post("/{event_id}/transition", operation_id="transitionAgentEvent")
    def transition(event_id: str, payload: dict[str, Any]):
        return transition_agent_event(event_id, payload["status"], payload.get("actor", "system"))

    @router.get("/stats/overview", operation_id="getAgentEventStats")
    def stats():
        return agent_event_stats()

    return router


router = build_router()

__all__ = ["router", "create_agent_event", "list_agent_events", "get_agent_event", "transition_agent_event"]