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import logging
from fastapi import APIRouter, BackgroundTasks, HTTPException
from pydantic import BaseModel
from typing import List, Optional, Dict
from app.services.note_store import create_note, get_note
from app.jobs.async_enrichment_job import enrich_note
from app.models.enums import NoteType, NoteStatus
from app.utils.time import now_ts


router = APIRouter(prefix="/internal/notes", tags=["internal"])
logger = logging.getLogger(__name__)


class NoteTextInternalCreateRequest(BaseModel):
    note_id: str
    raw_text: str
    folder_id: Optional[str] = None
    generate: List[str] = []


@router.post("/text")
async def create_text_note_internal(req: NoteTextInternalCreateRequest, bg: BackgroundTasks):
    """
    Idempotent create for text notes:
    - If note exists -> return current status
    - Else create note with provided `note_id` and optionally enqueue enrichment
    """
    now = now_ts()

    allowed = {"normalize", "keywords", "summary", "mindmap"}
    if not set(req.generate).issubset(allowed):
        raise HTTPException(400, "Invalid generate task")

    # IDEMPOTENT CHECK
    existing = get_note(req.note_id)
    if existing:
        logger.info("Note already exists, skip create note_id=%s", req.note_id)
        return {
            "note_id": req.note_id,
            "status": existing.get("status"),
        }

    has_enrichment = bool(req.generate)
    note = {
        "note_id": req.note_id,
        "type": NoteType.text,
        "raw_text": req.raw_text,
        "folder_id": req.folder_id,
        "status": NoteStatus.processing if has_enrichment else NoteStatus.created,
        "created_at": now,
        "updated_at": now,
    }

    # Prepare fields for enrichment if requested
    if req.generate:
        note.update({
            "normalized_text": None,
            "title": None,
            "keywords": [],
            "summary": None,
            "mindmap": None,
            "generate": req.generate,
        })

    try:
        create_note(note)
    except ValueError:
        # race: another worker created it first
        logger.warning("Race create_note, ignore note_id=%s", req.note_id)
        existing = get_note(req.note_id)
        return {
            "note_id": req.note_id,
            "status": existing.get("status") if existing else NoteStatus.created,
        }

    # enqueue enrichment if requested
    if req.generate:
        try:
            bg.add_task(enrich_note, req.note_id, req.generate)
        except Exception:
            # don't fail the request if enqueue fails; log and continue
            logger.exception("Failed to enqueue enrich_note for %s", req.note_id)

    return {"note_id": req.note_id, "status": note["status"]}