# backend/app/connectors/knowledge/clipper.py — 웹 클리퍼 / Markdown 노트 임포트(로컬 우선)
import hashlib
from datetime import UTC, datetime

from sqlmodel import Session

from ..base import BaseConnector, NormalizedRecord, RawRecord
from .normalize import normalize_knowledge, upsert_knowledge


class ClipperConnector(BaseConnector):
    domain = "knowledge"
    entity_type = "knowledge_item"

    def fetch(self, session: Session, *, full: bool = False):
        for p in getattr(self, "_items", []):
            yield RawRecord(
                external_id=p["id"],
                payload=p,
                etag=p.get("title", ""),
                external_updated_at=datetime.now(UTC),
            )

    def normalize(self, raw: RawRecord) -> NormalizedRecord:
        return normalize_knowledge(self.account, raw, provider="clipper")

    def write(self, session: Session, norm: NormalizedRecord):
        return upsert_knowledge(session, norm)

    def event_for(self, norm, entity_id):
        return "knowledge.ingested"

    def import_bytes(self, session: Session, content: bytes, filename: str = "") -> dict:
        text = content.decode("utf-8", "ignore")
        title = next((ln.lstrip("# ").strip() for ln in text.split("\n") if ln.strip()), filename)
        self._items = [
            {
                "id": "clip-" + hashlib.sha1(text.encode()).hexdigest()[:12],
                "type": "article",
                "title": title or "스크랩",
                "src": filename or "웹 클리퍼",
                "excerpt": text[:280],
            }
        ]
        res = self.sync(session, full=True)
        return {
            "entity_type": "knowledge_item",
            "imported": res.upserted,
            "skipped": res.skipped,
            "errors": res.errors,
            "detail": f"{filename or '스크랩'} · 지식 {res.upserted}건 적재",
        }