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"""
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数据接口 - 批量获取 / 获取最新缓存
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"""
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import logging
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from typing import Optional
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from fastapi import APIRouter, Depends, HTTPException, UploadFile, File
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from sqlalchemy.orm import Session
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from app.database import get_db
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from app.schemas import (
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BatchFetchRequest,
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BatchFetchResponse,
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LatestDataResponse,
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CandleItem,
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TimeframeData,
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SymbolDataResponse,
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)
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from app.services.collector import fetch_symbol_data, fetch_batch
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from app.services.cache import (
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save_market_data,
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get_cached_data,
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get_latest_cached,
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check_cache_status,
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)
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from app.config import CACHE_TTL_SECONDS
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from datetime import datetime
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logger = logging.getLogger(__name__)
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router = APIRouter(prefix="/data", tags=["数据"])
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@router.post("/batch-fetch", response_model=BatchFetchResponse)
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def batch_fetch(req: BatchFetchRequest, db: Session = Depends(get_db)):
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"""
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批量获取指定品种、指定周期的数据。
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智能缓存：已存在且有效的数据不重复请求。
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"""
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symbols = req.symbols
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periods = req.periods
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data_type = req.data_type
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success = []
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failed = []
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details = {}
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for sym in symbols:
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status = check_cache_status(db, sym, data_type, periods)
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if status["all_valid"]:
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logger.info(f"[{sym}] 缓存全部命中，跳过采集")
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cached = get_cached_data(db, sym, data_type, periods)
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timeframes = []
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for p, candles in cached["timeframes"].items():
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timeframes.append(TimeframeData(
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period=p,
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candles=[CandleItem(**c) for c in candles],
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candle_count=len(candles),
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fetched_at=cached.get("timestamp", ""),
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))
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details[sym] = SymbolDataResponse(
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symbol=sym,
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data_type=data_type,
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current_price=cached.get("current_price"),
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timeframes=timeframes,
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source="cache",
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)
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success.append(sym)
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continue
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need_fetch = status["missing_periods"]
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logger.info(f"[{sym}] 缓存部分缺失，需要采集: {need_fetch}")
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result = fetch_symbol_data(sym, data_type, need_fetch)
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if result.get("timeframes"):
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save_market_data(db, sym, result)
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success.append(sym)
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all_timeframes = {}
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if status["valid_periods"]:
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existing = get_cached_data(db, sym, data_type, status["valid_periods"])
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if existing:
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all_timeframes.update(existing["timeframes"])
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all_timeframes.update(result["timeframes"])
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timeframes = []
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for p in periods:
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candles = all_timeframes.get(p, [])
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if candles:
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timeframes.append(TimeframeData(
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period=p,
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candles=[CandleItem(**c) for c in candles],
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candle_count=len(candles),
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fetched_at=result.get("timestamp", ""),
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))
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details[sym] = SymbolDataResponse(
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symbol=sym,
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data_type=data_type,
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current_price=result.get("current_price"),
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timeframes=timeframes,
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source="live+cache",
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)
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else:
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failed.append(sym)
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details[sym] = {"error": result.get("error", "未知错误")}
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return BatchFetchResponse(
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success=success,
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failed=failed,
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details=details,
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)
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@router.get("/latest/{symbol}", response_model=SymbolDataResponse)
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def get_latest(
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symbol: str,
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data_type: str = "futures",
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period: Optional[str] = None,
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db: Session = Depends(get_db),
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):
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"""
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从缓存获取最新数据。
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可指定单个 period，不指定则返回所有已缓存周期。
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"""
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cached = get_cached_data(db, symbol, data_type, [period] if period else None)
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if not cached:
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raise HTTPException(status_code=404, detail=f"未找到 {symbol} 的缓存数据")
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timeframes = []
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for p, candles in cached["timeframes"].items():
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# 转换数据格式: time -> datetime
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normalized_candles = []
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for c in candles:
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candle_dict = dict(c)
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if 'time' in candle_dict and 'datetime' not in candle_dict:
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candle_dict['datetime'] = candle_dict.pop('time')
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normalized_candles.append(candle_dict)
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timeframes.append(TimeframeData(
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period=p,
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candles=[CandleItem(**c) for c in normalized_candles],
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candle_count=len(normalized_candles),
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fetched_at=cached.get("timestamp", ""),
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))
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return SymbolDataResponse(
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symbol=symbol,
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data_type=data_type,
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current_price=cached.get("current_price"),
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timeframes=timeframes,
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source="cache" if cached.get("is_fresh", False) else "cache_stale",
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)
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@router.get("/latest/{symbol}/{period}")
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def get_latest_by_period(
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symbol: str,
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period: str,
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data_type: str = "futures",
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db: Session = Depends(get_db),
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):
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"""
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获取缓存中指定品种+周期的最新数据。
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返回单个周期的 K 线。
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"""
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cached = get_cached_data(db, symbol, data_type, [period])
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if not cached:
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raise HTTPException(status_code=404, detail=f"未找到 {symbol} {period} 的缓存")
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candles = cached["timeframes"].get(period, [])
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return {
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"symbol": symbol,
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"period": period,
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"data_type": data_type,
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"candles": candles,
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"candle_count": len(candles),
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"current_price": cached.get("current_price"),
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"fetched_at": cached.get("timestamp"),
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"is_fresh": cached.get("is_fresh", False),
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}
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@router.get("/cache-status/{symbol}")
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def cache_status(symbol: str, db: Session = Depends(get_db)):
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"""查看品种的缓存状态"""
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records = get_latest_cached(db, symbol)
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if not records:
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return {"symbol": symbol, "cached_periods": [], "status": "no_data"}
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now = datetime.now()
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periods_info = []
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for r in records:
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age_seconds = (now - r.fetched_at).total_seconds()
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periods_info.append({
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"period": r.period,
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"candle_count": r.candle_count,
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"fetched_at": r.fetched_at.isoformat(),
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"age_seconds": round(age_seconds, 0),
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"is_fresh": age_seconds < CACHE_TTL_SECONDS,
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})
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return {
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"symbol": symbol,
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"cached_periods": periods_info,
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"status": "ok",
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}
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