"""FastAPI: Excel workbook → detect VV sheets → find price inconsistencies → Excel report."""
import logging
import os
import uuid
from pathlib import Path

from fastapi import FastAPI, File, HTTPException, UploadFile
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import FileResponse
from fastapi.staticfiles import StaticFiles

from vv_logic import analyse, write_report

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

app = FastAPI(title="VV Price Check")
app.add_middleware(CORSMiddleware, allow_origins=["*"],
                   allow_methods=["*"], allow_headers=["*"])

WORK_DIR = Path(os.getenv("WORK_DIR", "/tmp/vv-check"))
WORK_DIR.mkdir(parents=True, exist_ok=True)

jobs: dict[str, dict] = {}


@app.get("/")
async def root():
    return FileResponse("static/index.html")


@app.post("/api/check")
async def check(file: UploadFile = File(...)):
    suffix = Path(file.filename or "").suffix.lower()
    if suffix not in (".xlsx", ".xlsm"):
        raise HTTPException(400, "Podporované formáty: .xlsx, .xlsm")

    job_id = str(uuid.uuid4())
    job_dir = WORK_DIR / job_id
    job_dir.mkdir()
    input_path = job_dir / f"input{suffix}"
    input_path.write_bytes(await file.read())
    logger.info("Job %s: %s (%d bytes)", job_id, file.filename, input_path.stat().st_size)

    try:
        result = analyse(input_path)
    except Exception as exc:
        logger.exception("Analysis failed")
        raise HTTPException(500, f"Analýza selhala: {exc}")

    jobs[job_id] = {
        "filename": file.filename,
        "job_dir": str(job_dir),
        "result": result,
    }
    return {"job_id": job_id, "result": result}


@app.get("/api/report/{job_id}")
async def report(job_id: str):
    if job_id not in jobs:
        raise HTTPException(404, "Úloha nenalezena")
    job = jobs[job_id]
    out_path = Path(job["job_dir"]) / "report.xlsx"
    write_report(job["result"], job.get("filename") or "kalkulace.xlsx", out_path)
    stem = Path(job["filename"]).stem if job.get("filename") else "kalkulace"
    return FileResponse(
        str(out_path),
        media_type="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
        filename=f"kontrola_cen_{stem}.xlsx",
    )


@app.get("/health")
async def health():
    return {"status": "ok"}


app.mount("/static", StaticFiles(directory="static"), name="static")