"""Read-only Agent Management API."""

from typing import Annotated

from fastapi import APIRouter, Depends, Response

from app.agent_registry.dependencies import get_agent_registry_service
from app.agent_registry.models import AgentRegistryResponse
from app.agent_registry.service import AgentRegistryService
from app.identity import require_permission


router = APIRouter(tags=["agents"])

RegistryService = Annotated[
    AgentRegistryService,
    Depends(get_agent_registry_service),
]

AgentViewer = Annotated[
    dict,
    Depends(require_permission("agents.view")),
]


@router.get(
    "/api/agents",
    response_model=AgentRegistryResponse,
)
def list_agents(
    response: Response,
    current_user: AgentViewer,
    service: RegistryService,
) -> AgentRegistryResponse:
    del current_user

    response.headers["Cache-Control"] = "no-store"

    data = service.list_registry()

    return AgentRegistryResponse(
        data=data,
        meta={
            "agent_count": len(data.agents),
            "site_count": len(data.sites),
            "zone_count": len(data.zones),
        },
    )