#!/usr/bin/env python3
from __future__ import annotations

import os
import sys
from pathlib import Path

from fastapi import FastAPI

PROJECT_ROOT = Path(os.environ.get("GENE_FAMILY_ROOT", "/data/gene-family-mas-v2"))
GFANALYSIS_ROOT = Path(os.environ.get("GFANALYSIS_ROOT", "/data/wutx/00test/gfAnalysis"))
for root in (PROJECT_ROOT, GFANALYSIS_ROOT):
    value = str(root)
    if value not in sys.path:
        sys.path.insert(0, value)

from src.rag.qa_v1_1_73.api import router
from src.rag.qa_v1_1_73.backend_guard import validate_backends
from src.rag.qa_v1_1_73.soft_gate_policy import gate_policy

app = FastAPI(
    title="Plant Biology QA V1.1.73",
    version="1.1.73",
    description=(
        "QA V1.1.73: graph-balanced top30 plus cascaded two-hop native Neo4j path chains. The top30 context keeps "
        "at least 15 graph-derived evidence items when available, and sends "
        "native graph chains as a separate output. Chat composes a validated final LLM answer; "
        "retrieval-only search returns evidence without an answer."
    ),
)
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": "1.1.73-assertion-anchored",
        "gate_policy": gate_policy(),
        "backend": getattr(app.state, "kb_backend_identity", None),
    }