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from datetime import date

import pandas as pd
import pytest

from data.fund_fetcher import _parse_mobile_recent_nav
from services.predictor_service import _fund_nav_fallback_prediction


def test_moneydj_mobile_recent_nav_parser_handles_year_boundary():
    html = """
    <html>
      <body>
        <span>\u7f8e\u5143(2026/01/02)</span>
        <table>
          <tr><td>01/02</td><td><span>9.3700</span></td></tr>
          <tr><td>12/31</td><td><span>9.3300</span></td></tr>
        </table>
      </body>
    </html>
    """

    rows = _parse_mobile_recent_nav(html)

    assert rows[0]["date"] == date(2026, 1, 2)
    assert rows[0]["close"] == 9.37
    assert rows[1]["date"] == date(2025, 12, 31)
    assert rows[1]["volume"] == 1.0


def test_short_moneydj_fund_history_returns_degraded_nav_prediction():
    df = pd.DataFrame({
        "date": pd.date_range("2026-05-01", periods=6),
        "open": [9.30, 9.31, 9.32, 9.34, 9.35, 9.37],
        "high": [9.30, 9.31, 9.32, 9.34, 9.35, 9.37],
        "low": [9.30, 9.31, 9.32, 9.34, 9.35, 9.37],
        "close": [9.30, 9.31, 9.32, 9.34, 9.35, 9.37],
        "volume": [1.0] * 6,
    })

    result = _fund_nav_fallback_prediction("PIM91", df)

    assert result["signal"] == "HOLD"
    assert result["degraded"] is True
    assert result["history_rows"] == 6
    assert result["feature_version"] == "fund-nav-fallback-v1"
    assert result["source"] == "MoneyDJ mobile recent NAV fallback"
    assert result["signal_probability"] == pytest.approx(0.5376, abs=0.0001)