"""compute_factors 入口脚本的单元测试（使用 mock 隔离外部依赖）。"""

from unittest.mock import MagicMock, patch

import polars as pl
import pytest

from src.data.compute_factors import run


@pytest.fixture
def mock_manager():
    """提供一个 mock 的 FactorManager。"""
    manager = MagicMock()
    manager.get_all_factors.return_value = pl.DataFrame(
        {
            "factor_id": ["F_001", "F_002"],
            "name": ["ma_5", "ma_20"],
            "dsl": ["ts_mean(close, 5)", "ts_mean(close, 20)"],
        }
    )
    manager.get_factors_by_name.side_effect = lambda name: pl.DataFrame(
        {"name": [name], "dsl": [f"dsl_of_{name}"]}
    )
    return manager


@pytest.fixture
def mock_engine():
    """提供一个 mock 的 FactorEngine。"""
    engine = MagicMock()
    engine.compute.side_effect = lambda cols, start, end: pl.DataFrame(
        {
            "trade_date": ["20240101", "20240101"],
            "ts_code": ["000001.SZ", "000002.SZ"],
            cols[0]: [1.0, 2.0],
        }
    )
    return engine


@pytest.fixture
def mock_storage(tmp_path):
    """提供一个 mock 的 FactorStorage，全部校验通过。"""
    storage = MagicMock()
    storage.validate.return_value = (
        True,
        {"max_abs_diff": 0.0, "mean_abs_diff": 0.0, "matched_rows": 2},
    )
    storage.save.return_value = None
    return storage


def test_run_auto_discover_factors(mock_manager, mock_engine, mock_storage):
    """未传入 factor_names 时自动读取 metadata 中全部因子。"""
    with (
        patch("src.data.compute_factors.FactorEngine", return_value=mock_engine),
        patch("src.data.compute_factors.FactorStorage", return_value=mock_storage),
        patch("src.data.compute_factors.FactorManager", return_value=mock_manager),
    ):
        result = run(
            factor_names=[],
            metadata="dummy.jsonl",
            start_date="20240101",
            end_date="20240131",
        )

    assert result["success"] == ["ma_5", "ma_20"]
    assert len(result["failed"]) == 0
    assert mock_manager.get_all_factors.called


def test_run_validate_fail_skip(mock_manager, mock_engine, mock_storage):
    """校验失败且无 force 时跳过写入。"""
    mock_storage.validate.return_value = (
        False,
        {"max_abs_diff": 1.0, "mean_abs_diff": 0.5, "matched_rows": 2},
    )

    with (
        patch("src.data.compute_factors.FactorEngine", return_value=mock_engine),
        patch("src.data.compute_factors.FactorStorage", return_value=mock_storage),
        patch("src.data.compute_factors.FactorManager", return_value=mock_manager),
    ):
        result = run(
            factor_names=["ma_5"],
            metadata="dummy.jsonl",
            start_date="20240101",
            end_date="20240131",
            force=False,
        )

    assert result["success"] == []
    assert len(result["failed"]) == 1
    assert result["failed"][0]["name"] == "ma_5"
    assert result["failed"][0]["reason"] == "校验失败"
    mock_storage.save.assert_not_called()


def test_run_validate_fail_force(mock_manager, mock_engine, mock_storage):
    """校验失败但 force=True 时强制写入。"""
    mock_storage.validate.return_value = (
        False,
        {"max_abs_diff": 1.0, "mean_abs_diff": 0.5, "matched_rows": 2},
    )

    with (
        patch("src.data.compute_factors.FactorEngine", return_value=mock_engine),
        patch("src.data.compute_factors.FactorStorage", return_value=mock_storage),
        patch("src.data.compute_factors.FactorManager", return_value=mock_manager),
    ):
        result = run(
            factor_names=["ma_5"],
            metadata="dummy.jsonl",
            start_date="20240101",
            end_date="20240131",
            force=True,
        )

    assert result["success"] == ["ma_5"]
    assert len(result["failed"]) == 0
    mock_storage.save.assert_called_once()


def test_run_missing_metadata_entry(mock_manager, mock_engine, mock_storage):
    """metadata 中找不到因子时标记失败。"""
    mock_manager.get_factors_by_name.side_effect = None
    mock_manager.get_factors_by_name.return_value = pl.DataFrame(
        {"name": [], "dsl": []}
    )

    with (
        patch("src.data.compute_factors.FactorEngine", return_value=mock_engine),
        patch("src.data.compute_factors.FactorStorage", return_value=mock_storage),
        patch("src.data.compute_factors.FactorManager", return_value=mock_manager),
    ):
        result = run(
            factor_names=["unknown"],
            metadata="dummy.jsonl",
            start_date="20240101",
            end_date="20240131",
        )

    assert result["success"] == []
    assert len(result["failed"]) == 1
    assert "未找到" in result["failed"][0]["reason"]


def test_run_engine_exception(mock_manager, mock_engine, mock_storage):
    """engine.compute 抛出异常时标记失败。"""
    mock_engine.compute.side_effect = ValueError("compute error")

    with (
        patch("src.data.compute_factors.FactorEngine", return_value=mock_engine),
        patch("src.data.compute_factors.FactorStorage", return_value=mock_storage),
        patch("src.data.compute_factors.FactorManager", return_value=mock_manager),
    ):
        result = run(
            factor_names=["ma_5"],
            metadata="dummy.jsonl",
            start_date="20240101",
            end_date="20240131",
        )

    assert result["success"] == []
    assert len(result["failed"]) == 1
    assert "compute error" in result["failed"][0]["reason"]


def test_run_missing_result_column(mock_engine, mock_storage, mock_manager):
    """计算结果缺少对应因子列时标记失败。"""
    mock_engine.compute.side_effect = lambda cols, start, end: pl.DataFrame(
        {
            "trade_date": ["20240101"],
            "ts_code": ["000001.SZ"],
            "wrong_col": [1.0],
        }
    )

    with (
        patch("src.data.compute_factors.FactorEngine", return_value=mock_engine),
        patch("src.data.compute_factors.FactorStorage", return_value=mock_storage),
        patch("src.data.compute_factors.FactorManager", return_value=mock_manager),
    ):
        result = run(
            factor_names=["ma_5"],
            metadata="dummy.jsonl",
            start_date="20240101",
            end_date="20240131",
        )

    assert result["success"] == []
    assert len(result["failed"]) == 1
    assert "缺少列" in result["failed"][0]["reason"]