from fastapi import APIRouter, HTTPException, Query
from app.schemas import HistoryResponse
from app.services.market_data import get_enriched_history, last_n_candles

router = APIRouter(prefix="/api")


@router.get("/price/history", response_model=HistoryResponse)
def get_price_history(
    ticker: str = Query(..., min_length=1),
    days: int = Query(60, ge=30, le=365),
):
    try:
        df_raw, _df_tech = get_enriched_history(ticker)

        # Cap by available data, not model window
        available_days = len(df_raw)
        n = min(days, available_days)

        candles = last_n_candles(df_raw, n)

        return HistoryResponse(
            ticker=ticker.upper(),
            historicalPrices=candles,
        )

    except HTTPException:
        raise
    except Exception as e:
        print("🔥 BACKEND ERROR:", repr(e))
        raise HTTPException(status_code=500, detail=str(e))