import sys
from contextlib import nullcontext

import pytest

from clifinance.main.app import main

app = "src/clifinance/main/app.py"

main_help_out = [
    "usage:",
    "app.py",
    "[-h]",
    "{balance,select,add}",
    "...",
    "Cli",
    "finance",
    "app",
    "options:",
    "-h,",
    "--help",
    "show",
    "this",
    "help",
    "message",
    "and",
    "exit",
    "Availeble",
    "commands:",
    "{balance,select,add}",
    "balance",
    "Get",
    "balance",
    "select",
    "Get",
    "expenses",
    "by",
    "filter",
    "add",
    "Add",
    "new",
    "expense",
]

main_help_testdata = [
    (app, "-h", nullcontext(main_help_out)),
    (app, "--help", nullcontext(main_help_out)),
]


@pytest.mark.parametrize("app, arg, expectation", main_help_testdata)
def test_main_help(capsys, app, arg, expectation):
    with expectation as e:
        sys.argv = [app, arg]

        with pytest.raises(SystemExit) as excinfo:
            main()

        out, err = capsys.readouterr()

        assert excinfo.value.code == 0
        assert err == ""
        assert out.split() == e