"""v1 OCR job API — upload ink raster, poll status, fetch text."""

from __future__ import annotations

import os
import uuid
from datetime import datetime, timezone

from fastapi import APIRouter, Depends, File, Form, HTTPException, UploadFile, status

from ..auth import get_current_user
from ..config import settings
from ..ocr import queue as ocr_queue

router = APIRouter()


@router.post("/jobs", status_code=status.HTTP_202_ACCEPTED)
async def create_ocr_job(
    image: UploadFile = File(...),
    source_path: str = Form(""),
    page_index: int = Form(0),
    user_id: str = Depends(get_current_user),
) -> dict:
    """Enqueue an OCR job from an uploaded PNG/JPEG of handwriting."""
    job_id = str(uuid.uuid4())
    blob_dir = os.path.join(settings.storage_path, "ocr_blobs", user_id)
    os.makedirs(blob_dir, exist_ok=True)
    ext = os.path.splitext(image.filename or "ink.png")[1] or ".png"
    blob_path = os.path.join(blob_dir, f"{job_id}{ext}")
    data = await image.read()
    if not data:
        raise HTTPException(status.HTTP_400_BAD_REQUEST, detail="empty image")
    with open(blob_path, "wb") as f:
        f.write(data)

    ocr_queue.enqueue(
        {
            "id": job_id,
            "user_id": user_id,
            "source_path": source_path,
            "note_id": source_path or job_id,
            "page_index": page_index,
            "image_path": blob_path,
            "created_at": datetime.now(timezone.utc).isoformat(),
        }
    )

    return {
        "job_id": job_id,
        "status": "pending",
        "source_path": source_path,
        "page_index": page_index,
    }


@router.get("/jobs/{job_id}")
async def get_ocr_job(
    job_id: str,
    user_id: str = Depends(get_current_user),
) -> dict:
    job = ocr_queue.get_status(job_id)
    if job is None:
        raise HTTPException(status.HTTP_404_NOT_FOUND, detail="job not found")
    if job.get("user_id") not in (None, user_id):
        raise HTTPException(status.HTTP_403_FORBIDDEN, detail="forbidden")
    return {
        "job_id": job_id,
        "status": job.get("status"),
        "result": job.get("result_text") or job.get("result") or job.get("text"),
        "error": job.get("error_message") or job.get("error"),
        "source_path": job.get("source_path"),
        "page_index": job.get("page_index"),
    }