from __future__ import annotations

import sys
from pathlib import Path

from fastapi import FastAPI


PROJECT_ROOT = Path(__file__).resolve().parents[1]
QA_SERVICE_ROOT = PROJECT_ROOT / "services" / "qa_v1_1_73"
if str(QA_SERVICE_ROOT) not in sys.path:
    sys.path.insert(0, str(QA_SERVICE_ROOT))

from src.rag.qa_v1_1_73 import __version__
from src.rag.qa_v1_1_73.api import router
from src.rag.qa_v1_1_73.backend_guard import validate_backends


app = FastAPI(
    title="Plant Biology QA V1.1.73",
    version=__version__,
    description=(
        "Production full-graph QA with assertion-anchored Qdrant recall, "
        "bounded canonical Neo4j expansion, BGE reranking, and citation validation."
    ),
)
app.include_router(router)


@app.on_event("startup")
def validate_production_backends() -> None:
    app.state.kb_backend_identity = validate_backends()


@app.get("/health")
def health():
    return {
        "status": "ok",
        "service": "qa_v1_1_73",
        "version": __version__,
        "source": "plantai_git_repository",
        "backend": app.state.kb_backend_identity,
    }