"""启动自检：Redis + 关键路由是否挂载（前端 Topbar 条用）。"""
from __future__ import annotations

from fastapi import APIRouter, FastAPI, Request

from app.config.settings import settings

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


def build_ready_payload(app: FastAPI, trace_id: str) -> dict:
    checks: dict[str, bool | str] = {}

    try:
        from app.service.risk import redis_gateway

        gw = redis_gateway.get_gateway()
        gw.ping()
        checks["redis"] = True
    except Exception as exc:  # noqa: BLE001
        checks["redis"] = False
        checks["redis_error"] = str(exc)[:120]

    paths = set(app.openapi().get("paths", {}).keys())
    checks["chat_close_all"] = "/api/chat/sessions/close-all" in paths
    checks["chat_sessions"] = "/api/chat/sessions" in paths
    checks["analyst_chat"] = "/api/analyst/chat" in paths
    checks["products_nav_history"] = "/api/products/{product_id}/nav/history" in paths

    critical = [
        checks["chat_close_all"],
        checks["chat_sessions"],
        checks["analyst_chat"],
        checks["products_nav_history"],
    ]
    routes_ok = all(critical)
    redis_ok = checks.get("redis") is True
    ok = routes_ok
    return {
        "ok": ok,
        "degraded": routes_ok and not redis_ok,
        "env": settings.app_env,
        "trace_id": trace_id,
        "checks": checks,
    }


@router.get("/api/ready")
def ready(request: Request):
    trace_id = getattr(request.state, "trace_id", "unknown")
    return build_ready_payload(request.app, trace_id)