"""
中国A股数据源 — 多层 fallback

有 TWELVE_DATA_API_KEY:
  所有周期 → Twelve Data（主） → 腾讯日/周线 → yfinance → AkShare

无 API Key:
  分钟/小时 → yfinance → AkShare
  日/周线 → 腾讯 fqkline → yfinance → AkShare
"""

from __future__ import annotations

from typing import Dict, List, Any, Optional

from app.data_sources.base import BaseDataSource
from app.data_sources.tencent import normalize_cn_code, fetch_quote, parse_quote_to_ticker, fetch_kline, tencent_kline_rows_to_dicts
from app.data_sources.asia_stock_kline import (
    normalize_chart_timeframe,
    fetch_twelvedata_klines,
    fetch_yfinance_klines,
    fetch_akshare_minute_klines,
    fetch_akshare_weekly_klines,
)
from app.utils.logger import get_logger

logger = get_logger(__name__)


class CNStockDataSource(BaseDataSource):
    """A股数据源（TwelveData + Tencent + yfinance + AkShare）"""

    name = "CNStock/multi-source"

    def get_ticker(self, symbol: str) -> Dict[str, Any]:
        code = normalize_cn_code(symbol)
        parts = fetch_quote(code)
        if not parts:
            return {"last": 0, "symbol": code}
        t = parse_quote_to_ticker(parts)
        return {
            "last": t.get("last", 0),
            "change": t.get("change", 0),
            "changePercent": t.get("changePercent", 0),
            "high": t.get("high", 0),
            "low": t.get("low", 0),
            "open": t.get("open", 0),
            "previousClose": t.get("previousClose", 0),
            "name": t.get("name", ""),
            "symbol": code,
        }

    def get_kline(
        self,
        symbol: str,
        timeframe: str,
        limit: int,
        before_time: Optional[int] = None,
    ) -> List[Dict[str, Any]]:
        code = normalize_cn_code(symbol)
        tf = normalize_chart_timeframe(timeframe)
        lim = max(int(limit or 300), 1)

        # Tier 1: Twelve Data (paid, most reliable)
        rows = fetch_twelvedata_klines(
            is_hk=False, tencent_code=code, timeframe=tf, limit=lim, before_time=before_time
        )
        if rows:
            return self.filter_and_limit(rows, limit=lim, before_time=before_time)

        # Tier 2: Tencent for daily/weekly (fast, free)
        if tf in ("1D", "1W"):
            tf_map = {"1D": "day", "1W": "week"}
            period = tf_map.get(tf, "day")
            raw_rows = fetch_kline(code, period=period, count=lim, adj="qfq")
            out = tencent_kline_rows_to_dicts(raw_rows)
            if out:
                return self.filter_and_limit(out, limit=lim, before_time=before_time)

        # Tier 3: yfinance (works when Yahoo not rate-limited)
        rows = fetch_yfinance_klines(
            is_hk=False, tencent_code=code, timeframe=tf, limit=lim, before_time=before_time
        )
        if rows:
            return self.filter_and_limit(rows, limit=lim, before_time=before_time)

        # Tier 4: AkShare (fragile overseas, last resort)
        if tf in ("1m", "5m", "15m", "30m", "1H", "4H"):
            rows = fetch_akshare_minute_klines(
                is_hk=False, tencent_code=code, timeframe=tf, limit=lim, before_time=before_time
            )
        elif tf == "1W":
            rows = fetch_akshare_weekly_klines(
                is_hk=False, tencent_code=code, limit=lim, before_time=before_time
            )
        else:
            rows = []

        return self.filter_and_limit(rows, limit=lim, before_time=before_time)