import sys
import pytest
from io import StringIO
from unittest import mock
from redmine_reporter.cli import main
from redmine_reporter.config import Config


# Config читает env при импорте -- патчим класс напрямую.
# fetch_issues_with_spent_time импортируется в cli.py через "from .client import ...",
# поэтому мокать нужно имя в модуле cli, а не в client.


@mock.patch.multiple(
    Config,
    REDMINE_URL="https://red.eltex.loc",
    REDMINE_USER="x",
    REDMINE_PASSWORD="y",
)
@mock.patch("redmine_reporter.cli.fetch_issues_with_spent_time")
def test_cli_smoke_empty(mock_fetch):
    """Пустой список задач -- выход 0, сообщение о 0 задачах."""
    mock_fetch.return_value = []
    captured = StringIO()
    old_stdout, sys.stdout = sys.stdout, captured
    try:
        code = main(["--date", "2026-01-01--2026-01-31"])
    finally:
        sys.stdout = old_stdout
    assert code == 0
    assert "Total issues: 0" in captured.getvalue()


@mock.patch.multiple(
    Config,
    REDMINE_URL="https://red.eltex.loc",
    REDMINE_USER="x",
    REDMINE_PASSWORD="y",
)
@mock.patch("redmine_reporter.cli.fetch_issues_with_spent_time")
def test_cli_returns_zero_on_no_entries(mock_fetch):
    """None от fetch (нет time entries) -- выход 0."""
    mock_fetch.return_value = None
    code = main(["--date", "2026-01-01--2026-01-31"])
    assert code == 0


@mock.patch.multiple(
    Config,
    REDMINE_URL="",
    REDMINE_USER=None,
    REDMINE_PASSWORD=None,
)
def test_cli_config_error():
    """Невалидный конфиг -- выход 1."""
    code = main(["--date", "2026-01-01--2026-01-31"])
    assert code == 1


def test_cli_invalid_date_format():
    """Неверный формат даты -- выход 1."""
    code = main(["--date", "20260101-20260131"])
    assert code == 1


@mock.patch.multiple(
    Config,
    REDMINE_URL="https://red.eltex.loc",
    REDMINE_USER="x",
    REDMINE_PASSWORD="y",
)
@mock.patch("redmine_reporter.cli.fetch_issues_with_spent_time")
def test_cli_unknown_output_extension(mock_fetch, tmp_path):
    """Неизвестное расширение файла -- выход 1."""
    mock_fetch.return_value = []
    output = str(tmp_path / "report.xyz")
    code = main(["--date", "2026-01-01--2026-01-31", "--output", output])
    assert code == 1


@mock.patch.multiple(
    Config,
    REDMINE_URL="https://red.eltex.loc",
    REDMINE_USER="x",
    REDMINE_PASSWORD="y",
)
@mock.patch("redmine_reporter.cli.fetch_issues_with_spent_time")
def test_cli_output_without_extension(mock_fetch, tmp_path):
    """Файл без расширения -- выход 1 с подсказкой."""
    mock_fetch.return_value = []
    output = str(tmp_path / "report")
    code = main(["--date", "2026-01-01--2026-01-31", "--output", output])
    assert code == 1