# rfp_api_app.py
# -*- coding: utf-8 -*-
from __future__ import annotations
from typing import Dict, Any
import os, json, uuid, threading, time, traceback
from pathlib import Path
import logging
import requests

from fastapi import FastAPI, HTTPException, Query
from fastapi.responses import JSONResponse, FileResponse
from fastapi.middleware.cors import CORSMiddleware

# === Imports depuis ton repo cloné RFPmaster ===
from rfp_parser.prompting import build_chat_payload
from rfp_parser.exports_xls import build_xls_from_doc

# --------- Config ---------
DEEPINFRA_API_KEY = os.environ.get("DEEPINFRA_API_KEY", "")
MODEL_NAME        = os.environ.get("RFP_MODEL", "meta-llama/Meta-Llama-3.1-70B-Instruct")
DEEPINFRA_URL     = os.environ.get("DEEPINFRA_URL", "https://api.deepinfra.com/v1/openai/chat/completions")
RFP_DEBUG         = str(os.environ.get("RFP_DEBUG", "0")).lower() in {"1", "true", "yes"}
BASE_TMP          = Path("/tmp/rfp_jobs"); BASE_TMP.mkdir(parents=True, exist_ok=True)

logger = logging.getLogger("RFP_API")
if not logger.handlers:
    h = logging.StreamHandler()
    h.setFormatter(logging.Formatter("[API] %(levelname)s: %(message)s"))
    logger.addHandler(h)
logger.setLevel(logging.DEBUG if RFP_DEBUG else logging.INFO)

# --------- Jobs en mémoire ---------
JOBS: Dict[str, Dict[str, Any]] = {}
JOBS_LOCK = threading.Lock()

def new_job(text: str) -> str:
    job_id = uuid.uuid4().hex[:12]
    with JOBS_LOCK:
        JOBS[job_id] = {
            "status": "queued",
            "error": None,
            "xlsx_path": None,
            "xlsx_url": None,
            "started_at": time.time(),
            "done_at": None,
            "meta": {"model": MODEL_NAME, "length": len(text or "")},
        }
    return job_id

def set_job_status(job_id: str, **updates):
    with JOBS_LOCK:
        if job_id in JOBS:
            JOBS[job_id].update(**updates)

# --------- Cœur pipeline ---------
def parse_with_deepinfra(text: str) -> Dict[str, Any]:
    if not DEEPINFRA_API_KEY:
        raise RuntimeError("DEEPINFRA_API_KEY manquant (Settings → Secrets du Space).")
    payload = build_chat_payload(text, model=MODEL_NAME)
    headers = {"Authorization": f"Bearer {DEEPINFRA_API_KEY}", "Content-Type": "application/json"}
    logger.info("DeepInfra call model=%s max_tokens=%s", payload.get("model"), payload.get("max_tokens"))
    r = requests.post(DEEPINFRA_URL, headers=headers, json=payload, timeout=120)
    if r.status_code // 100 != 2:
        raise RuntimeError(f"DeepInfra HTTP {r.status_code}: {r.text}")
    data = r.json()
    try:
        content = data["choices"][0]["message"]["content"]
    except Exception:
        raise RuntimeError(f"Réponse inattendue DeepInfra: {json.dumps(data)[:400]}")
    try:
        doc = json.loads(content)
    except Exception as e:
        logger.warning("json.loads(content) a échoué; strip fallback. Err=%s", e)
        doc = json.loads(content.strip().strip('`').strip())
    if not isinstance(doc, dict):
        raise RuntimeError("Le contenu renvoyé n'est pas un objet JSON.")
    return doc

def build_xlsx(doc: Dict[str, Any], job_dir: Path) -> str:
    job_dir.mkdir(parents=True, exist_ok=True)
    out_path = str(job_dir / "feuille_de_charge.xlsx")
    baseline = (doc.get("assumptions") or {}).get("baseline_uop_kg") or 100.0
    try:
        baseline = float(baseline)
    except Exception:
        baseline = 100.0
    build_xls_from_doc(doc, out_path, baseline_kg=baseline)
    return out_path

def run_job(job_id: str, text: str) -> None:
    set_job_status(job_id, status="running")
    job_dir = BASE_TMP / job_id
    try:
        doc = parse_with_deepinfra(text)
        xlsx_path = build_xlsx(doc, job_dir)
        # Ici, comme on n’est PAS monté sous /api : le chemin est direct
        xlsx_url = f"/results/{job_id}/feuille_de_charge.xlsx"
        set_job_status(
            job_id,
            status="done",
            xlsx_path=xlsx_path,
            xlsx_url=xlsx_url,
            done_at=time.time(),
            meta={**JOBS[job_id]["meta"], "assumptions": doc.get("assumptions")},
        )
        logger.info("Job %s terminé -> %s", job_id, xlsx_path)
    except Exception as e:
        logger.error("Job %s échoué: %s\n%s", job_id, e, traceback.format_exc())
        set_job_status(job_id, status="error", error=str(e), done_at=time.time())

# --------- FastAPI ---------
app = FastAPI(title="RFP_MASTER API", version="1.0.0")
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],   # serre si tu veux limiter à ton Space Gradio
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

@app.get("/health")
def health():
    return {"ok": True, "ts": time.time(), "model": MODEL_NAME}

@app.post("/submit")
def submit(payload: Dict[str, Any]):
    text = (payload or {}).get("text", "")
    if not isinstance(text, str) or not text.strip():
        raise HTTPException(400, "Champ 'text' manquant ou vide.")
    job_id = new_job(text)
    t = threading.Thread(target=run_job, args=(job_id, text), daemon=True)
    t.start()
    return JSONResponse({"job_id": job_id, "status": "queued"})

@app.get("/status")
def status(job_id: str = Query(..., description="Identifiant renvoyé par /submit")):
    with JOBS_LOCK:
        info = JOBS.get(job_id)
    if not info:
        raise HTTPException(404, f"job_id inconnu: {job_id}")
    return JSONResponse({
        "job_id": job_id,
        "status": info.get("status"),
        "xlsx_url": info.get("xlsx_url"),
        "error": info.get("error"),
        "meta": info.get("meta"),
    })

@app.get("/results/{job_id}/feuille_de_charge.xlsx")
def download(job_id: str):
    with JOBS_LOCK:
        info = JOBS.get(job_id)
    if not info:
        raise HTTPException(404, f"job_id inconnu: {job_id}")
    if info.get("status") != "done":
        raise HTTPException(409, f"job {job_id} non prêt (status={info.get('status')})")
    xlsx_path = info.get("xlsx_path")
    if not xlsx_path or not Path(xlsx_path).exists():
        raise HTTPException(404, "Fichier indisponible.")
    return FileResponse(
        xlsx_path,
        media_type="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
        filename="feuille_de_charge.xlsx",
    )