"""한 종목에 대해 모든 소스를 갱신 + 구조화된 status 리턴.

POST /api/refresh/{code} 와 daily_batch 둘 다 이 함수를 호출.
"""
from __future__ import annotations

import logging
from dataclasses import asdict, dataclass, field
from datetime import date, timedelta
from typing import Any

from app.fetch import dart as dart_mod
from app.fetch import kis as kis_mod
from app.fetch import news as news_mod
from app.fetch import pykrx_helper

logger = logging.getLogger(__name__)


@dataclass
class SourceStatus:
    status: str                       # 'ok' / 'skipped_missing_key' / 'failed'
    inserted: int = 0
    updated: int = 0
    skipped: int = 0
    extra: dict[str, Any] = field(default_factory=dict)
    error: str | None = None


@dataclass
class RefreshReport:
    code: str
    pykrx_ohlcv: SourceStatus
    pykrx_trading_value: SourceStatus
    kis_daily: SourceStatus
    dart: SourceStatus
    naver_news: SourceStatus
    google_rss: SourceStatus
    finbert: SourceStatus

    def to_dict(self) -> dict[str, Any]:
        out: dict[str, Any] = {"code": self.code}
        for f in (
            "pykrx_ohlcv",
            "pykrx_trading_value",
            "kis_daily",
            "dart",
            "naver_news",
            "google_rss",
            "finbert",
        ):
            v: SourceStatus = getattr(self, f)
            out[f] = asdict(v)
        return out


def _pykrx_ohlcv(code: str, start: date, end: date) -> SourceStatus:
    try:
        res = pykrx_helper.fetch_ohlcv_daily(code, start, end)
        return SourceStatus(
            status=res.status(),
            inserted=res.inserted,
            updated=res.updated,
            error=res.error,
        )
    except Exception as exc:  # noqa: BLE001
        return SourceStatus(status="failed", error=str(exc))


def _pykrx_trading(code: str, start: date, end: date) -> SourceStatus:
    try:
        res = pykrx_helper.fetch_trading_value(code, start, end)
        return SourceStatus(
            status=res.status(),
            inserted=res.inserted,
            updated=res.updated,
            error=res.error,
        )
    except Exception as exc:  # noqa: BLE001
        return SourceStatus(status="failed", error=str(exc))


def _kis(code: str, start: date, end: date) -> SourceStatus:
    """KIS read-only EOD. 실제 DB 적재는 하지 않고 sanity 호출 + sample row 수만 리포트.
    pykrx 와 중복 데이터이므로 KIS 는 백업/실시간 용도이고, 일별 적재는 pykrx 가 1차.
    """
    try:
        rows = kis_mod.fetch_daily_price(code, start, end)
        return SourceStatus(status="ok", extra={"sample_rows": len(rows)})
    except kis_mod.SkippedMissingKey:
        return SourceStatus(status="skipped_missing_key")
    except Exception as exc:  # noqa: BLE001
        return SourceStatus(status="failed", error=str(exc))


def _dart(code: str, start: date, end: date) -> SourceStatus:
    try:
        items = dart_mod.fetch_disclosures(code, start, end)
        # 공시는 news 테이블에 upsert
        news_items = [
            news_mod.NewsItem(
                code=d.code,
                source="dart",
                title=d.title,
                url=d.url,
                published_at=d.published_at,
            )
            for d in items
        ]
        ins, skip = news_mod.upsert_news(news_items)
        return SourceStatus(status="ok", inserted=ins, skipped=skip, extra={"fetched": len(items)})
    except dart_mod.SkippedMissingKey:
        return SourceStatus(status="skipped_missing_key")
    except Exception as exc:  # noqa: BLE001
        return SourceStatus(status="failed", error=str(exc))


def _naver_news(code: str) -> SourceStatus:
    try:
        items = news_mod.fetch_naver_finance_news(code, max_pages=1)
        ins, skip = news_mod.upsert_news(items)
        return SourceStatus(status="ok", inserted=ins, skipped=skip, extra={"fetched": len(items)})
    except Exception as exc:  # noqa: BLE001
        return SourceStatus(status="failed", error=str(exc))


def _google_rss(code: str, name: str) -> SourceStatus:
    try:
        query = name or code
        items = news_mod.fetch_google_news_rss(query, code=code)
        ins, skip = news_mod.upsert_news(items)
        return SourceStatus(status="ok", inserted=ins, skipped=skip, extra={"fetched": len(items)})
    except Exception as exc:  # noqa: BLE001
        return SourceStatus(status="failed", error=str(exc))


def _finbert(code: str) -> SourceStatus:
    """방금 upsert 된 뉴스 중 sentiment_score 가 비어있는 행을 KR-FinBERT 로 스코어."""
    try:
        from app.nlp.score_news import score_pending_news

        # 한 종목에 대해 신규 뉴스가 매우 많아도 200건으로 컷.
        # daily_batch 끝에서 잔여분을 별도로 mop-up 한다.
        res = score_pending_news(code=code, limit=200)
        return SourceStatus(
            status="ok" if res.error is None else "failed",
            inserted=res.scored,
            skipped=res.failed,
            extra={"fetched": res.fetched},
            error=res.error,
        )
    except Exception as exc:  # noqa: BLE001
        return SourceStatus(status="failed", error=str(exc))


def refresh_code(code: str, name: str, *, lookback_days: int = 7) -> RefreshReport:
    """단기 갱신 (daily_batch 용). 최근 lookback_days 만 가져온다."""
    end = date.today()
    start = end - timedelta(days=lookback_days)
    return RefreshReport(
        code=code,
        pykrx_ohlcv=_pykrx_ohlcv(code, start, end),
        pykrx_trading_value=_pykrx_trading(code, start, end),
        kis_daily=_kis(code, start, end),
        dart=_dart(code, start, end),
        naver_news=_naver_news(code),
        google_rss=_google_rss(code, name),
        finbert=_finbert(code),
    )