"""Test yadm.alt-copy"""

import os

import pytest


@pytest.mark.parametrize(
    "setting, expect_link, pre_existing",
    [
        (None, True, None),
        (True, False, None),
        (False, True, None),
        (True, False, "link"),
        (True, False, "file"),
    ],
    ids=[
        "unset",
        "true",
        "false",
        "pre-existing symlink",
        "pre-existing file",
    ],
)
@pytest.mark.usefixtures("ds1_copy")
def test_alt_copy(runner, yadm_cmd, paths, tst_sys, setting, expect_link, pre_existing):
    """Test yadm.alt-copy"""

    if setting is not None:
        os.system(" ".join(yadm_cmd("config", "yadm.alt-copy", str(setting))))

    expected_content = f"test_alt_copy##os.{tst_sys}"

    alt_path = paths.work.join("test_alt_copy")
    if pre_existing == "symlink":
        alt_path.mklinkto(expected_content)
    elif pre_existing == "file":
        alt_path.write("wrong content")

    run = runner(yadm_cmd("alt"))
    assert run.success
    assert run.err == ""
    assert "Linking" in run.out

    assert alt_path.read() == expected_content
    assert alt_path.islink() == expect_link