from __future__ import annotations

import os
from pathlib import Path

import pytest

from gyxx_flow.modules.supply_chain.orchestrator.scripts import batch_process


def test_batch_only_selects_an_xlsx_from_the_current_collection(
    tmp_path: Path,
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    monkeypatch.setattr(batch_process, "DATA_DIR", tmp_path)
    old = tmp_path / "补货建议_旧.xlsx"
    current = tmp_path / "补货建议_本次.xlsx"
    old.write_bytes(b"old")
    current.write_bytes(b"current")
    os.utime(old, (100.0, 100.0))
    os.utime(current, (201.0, 201.0))

    assert batch_process._pick_latest_xlsx(since_epoch=200.0) == current
    assert batch_process._pick_latest_xlsx(since_epoch=202.0) is None


def test_no_replenishment_is_encoded_as_a_successful_business_result() -> None:
    source = (
        Path(batch_process.__file__).with_name("ProductReplenishment.py")
    ).read_text(encoding="utf-8-sig")

    assert "completed_without_replenishment = True" in source
    assert "return filepath or completed_without_replenishment" in source