"""回测参数校验（L1 静态规则 + L2 数据最新日）单测 + 2029 回归。

背景:2026-08-15 用户实况——组合回测结束时间选 2029 也能提交
(portfolio_ef8b655a),零校验跑出垃圾结果占任务位。
"""
import pytest
from fastapi import HTTPException

from sanguo_api import validation as V


def _ok_range():
    return "2024-01-01", "2024-06-30"


# ===== L1 静态规则 =====

def test_future_end_rejected():
    """用户报的 2029 场景:结束日期在未来必须 400。"""
    with pytest.raises(HTTPException) as e:
        V.validate_backtest_range("2024-01-01", "2029-12-31")
    assert e.value.status_code == 400
    assert "未来" in e.value.detail


def test_bad_format_rejected():
    with pytest.raises(HTTPException) as e:
        V.validate_backtest_range("2024/01/01", "2024-06-30")
    assert e.value.status_code == 400
    assert "格式" in e.value.detail


def test_start_after_end_rejected():
    with pytest.raises(HTTPException) as e:
        V.validate_backtest_range("2024-06-30", "2024-01-01")
    assert "早于" in e.value.detail


def test_span_too_short_rejected():
    with pytest.raises(HTTPException) as e:
        V.validate_backtest_range("2024-01-01", "2024-01-15")
    assert "过短" in e.value.detail


def test_valid_range_passes():
    s, t = _ok_range()
    assert V.validate_backtest_range(s, t) is None


def test_capital_and_rate_checks():
    with pytest.raises(HTTPException):
        V.validate_capital("初始资金", 0)
    with pytest.raises(HTTPException):
        V.validate_capital("初始资金", -100)
    assert V.validate_capital("初始资金", 1_000_000) is None
    # 费率应填小数(万3=0.0003);填成 3 明显是百分数/万分位口径错
    with pytest.raises(HTTPException):
        V.validate_rate("佣金率", 3.0)
    assert V.validate_rate("佣金率", 0.0003) is None


# ===== L2 数据最新日 =====

def test_end_beyond_latest_data_rejected(monkeypatch):
    # end 是过去日期(过 L1)但超过 mock 的数据最新日 → L2 拦
    monkeypatch.setattr(V, "get_latest_daily_date", lambda: "2026-07-31")
    with pytest.raises(HTTPException) as e:
        V.validate_backtest_range("2026-01-01", "2026-08-05")
    assert "数据最新到" in e.value.detail


def test_latest_query_failure_degrades_to_l1(monkeypatch):
    """查库失败返回 None → 只做 L1,数据层抖动不挡提交。"""
    monkeypatch.setattr(V, "get_latest_daily_date", lambda: None)
    assert V.validate_backtest_range("2026-01-01", "2026-08-05") is None


def test_latest_date_cached(monkeypatch):
    """24h 缓存:第二次调用不重复查库。"""
    calls = []
    monkeypatch.setattr(V, "_query_latest_daily_date", lambda: calls.append(1) or "2026-08-14")
    V._latest_cache = None  # 清模块缓存
    assert V.get_latest_daily_date() == "2026-08-14"
    assert V.get_latest_daily_date() == "2026-08-14"
    assert len(calls) == 1
    V._latest_cache = None  # 还原,避免污染其他测试


# ===== 入口集成:组合回测 2029 必须进不了队列 =====

def test_portfolio_submit_2029_rejected(monkeypatch):
    """回归:POST /portfolio/backtest end=2029 → 400,不产生任务。"""
    monkeypatch.setattr(V, "get_latest_daily_date", lambda: "2026-08-14")
    from sanguo_api.routes_portfolio import PortfolioBacktestRequest
    from sanguo_api.validation import validate_portfolio_request

    req = PortfolioBacktestRequest(start_date="2024-01-01", end_date="2029-12-31")
    with pytest.raises(HTTPException) as e:
        validate_portfolio_request(req)
    assert e.value.status_code == 400