from typing import Any

from fastapi import APIRouter, Request

from app.core.logging import get_logger

router = APIRouter()
logger = get_logger(__name__)


@router.get("/health")
async def health_check(request: Request):
    """Basic liveness probe. Returns ok if the process is running."""
    client_ip = request.headers.get("X-Forwarded-For", "direct")
    cf_ip = request.headers.get("CF-Connecting-IP", "none")

    return {
        "status": "ok",
        "proxy": {
            "x_forwarded_for": client_ip,
            "cf_connecting_ip": cf_ip,
            "via_cloudflare": cf_ip != "none",
        },
    }


@router.get("/ready")
async def readiness_probe(request: Request) -> dict[str, Any]:
    """Readiness probe: checks Qdrant connection and semantic cache are initialised."""
    failing = []

    try:
        qdrant = request.app.state.qdrant
        qdrant.get_collections()
    except Exception as e:
        logger.error("Qdrant connection failed during readiness check", exc_info=e)
        failing.append("qdrant")

    # Semantic cache: check it is initialised (not None).
    # In-memory cache never fails to connect — only check it exists.
    if getattr(request.app.state, "semantic_cache", None) is None:
        failing.append("semantic_cache")

    if failing:
        return {"status": "degraded", "failing": failing}

    return {"status": "ready"}