import os
from unittest import mock

import pytest

from redmine_reporter.cli import main, parse_date_range

VALID_ENV = {
    "REDMINE_URL": "https://red.eltex.loc",
    "REDMINE_API_KEY": "token",
}


@pytest.fixture(autouse=True)
def _reset_config_overrides():
    """Сбрасывает CLI-переопределения Config перед каждым тестом."""
    from redmine_reporter.config import Config

    Config.set_redmine_url("")
    Config.set_redmine_api_key("")
    yield
    Config.set_redmine_url("")
    Config.set_redmine_api_key("")


@pytest.mark.parametrize(
    "date_arg, expected",
    [
        ("2026-01-01--2026-01-31", ("2026-01-01", "2026-01-31")),
        (" 2026-01-01 -- 2026-01-31 ", ("2026-01-01", "2026-01-31")),
    ],
)
def test_parse_date_range_valid(date_arg, expected):
    assert parse_date_range(date_arg) == expected


@pytest.mark.parametrize(
    "date_arg",
    [
        "20260101-20260131",
        "2026-1-01--2026-01-31",
        "2026-02-30--2026-03-01",
        "2026-02-01--2026-01-31",
    ],
)
def test_parse_date_range_invalid(date_arg):
    with pytest.raises(ValueError):
        parse_date_range(date_arg)


@mock.patch.dict(os.environ, VALID_ENV, clear=True)
@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.dict(os.environ, {}, clear=True)
def test_cli_config_error():
    """Невалидный конфиг -- выход 1."""
    code = main(["--date", "2026-01-01--2026-01-31"])
    assert code == 1


@mock.patch.dict(os.environ, VALID_ENV, clear=True)
def test_cli_invalid_date_format():
    """Неверный формат даты -- выход 1."""
    code = main(["--date", "20260101-20260131"])
    assert code == 1


class _MockIssue:
    """Простой mock Redmine Issue для CLI-тестов."""

    def __init__(self, issue_id=1, subject="Task", project="Project", status="New"):
        self.id = issue_id
        self.subject = subject
        self.project = project
        self.status = status
        self.fixed_version = None


@mock.patch.dict(os.environ, VALID_ENV, clear=True)
@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."""
    issue = _MockIssue()
    mock_fetch.return_value = [(issue, 1.0)]
    output = str(tmp_path / "report.xyz")
    code = main(["--date", "2026-01-01--2026-01-31", "--output", output])
    assert code == 1


@mock.patch.dict(os.environ, VALID_ENV, clear=True)
@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."""
    issue = _MockIssue()
    mock_fetch.return_value = [(issue, 1.0)]
    output = str(tmp_path / "report")
    code = main(["--date", "2026-01-01--2026-01-31", "--output", output])
    assert code == 1


@mock.patch.dict(os.environ, VALID_ENV, clear=True)
@mock.patch("redmine_reporter.cli.fetch_issues_with_spent_time")
@mock.patch("redmine_reporter.cli.get_formatter_by_extension")
def test_cli_odt_missing_odfpy_message(mock_gf, mock_fetch, tmp_path, capsys):
    """При запросе .odt без odfpy — выход 1, понятное сообщение про odfpy."""
    issue = _MockIssue()
    mock_fetch.return_value = [(issue, 1.0)]
    mock_gf.return_value = None
    output = str(tmp_path / "report.odt")
    code = main(["--date", "2026-01-01--2026-01-31", "--output", output])
    assert code == 1
    captured = capsys.readouterr()
    assert "odfpy" in captured.err


@mock.patch.dict(os.environ, VALID_ENV, clear=True)
def test_cli_version_flag(capsys):
    """--version выводит версию и завершается с 0."""
    with pytest.raises(SystemExit) as exc_info:
        main(["--version"])
    assert exc_info.value.code == 0
    captured = capsys.readouterr()
    assert "redmine-reporter" in captured.out
    from redmine_reporter import __version__

    assert __version__ in captured.out


@mock.patch.dict(os.environ, VALID_ENV, clear=True)
@mock.patch("redmine_reporter.cli.fetch_issues_with_spent_time")
def test_cli_verbose_and_debug_flags_accepted(mock_fetch):
    """--verbose и --debug не ломают запуск."""
    mock_fetch.return_value = None
    code = main(["--date", "2026-01-01--2026-01-31", "--verbose"])
    assert code == 0
    code = main(["--date", "2026-01-01--2026-01-31", "--debug"])
    assert code == 0


class _MockIssue:
    """Простой mock Redmine Issue для CLI-тестов."""

    def __init__(self, issue_id=1, subject="Task", project="Project", status="New"):
        self.id = issue_id
        self.subject = subject
        self.project = project
        self.status = status
        self.fixed_version = None


@mock.patch.dict(os.environ, {}, clear=True)
@mock.patch("redmine_reporter.cli.fetch_issues_with_spent_time")
def test_cli_url_and_api_key_override_env(mock_fetch):
    """--url и --api-key переопределяют отсутствующие/другие env-переменные."""
    mock_fetch.return_value = None
    code = main(
        [
            "--date",
            "2026-01-01--2026-01-31",
            "--url",
            "https://other.redmine.loc",
            "--api-key",
            "cli-token",
        ]
    )
    assert code == 0


@mock.patch.dict(os.environ, {}, clear=True)
@mock.patch("redmine_reporter.cli.fetch_issues_with_spent_time")
def test_cli_config_file_loading(mock_fetch, tmp_path):
    """--config загружает переменные из указанного .env-файла."""
    config_path = tmp_path / "custom.env"
    config_path.write_text(
        "REDMINE_URL=https://config.redmine.loc\n" "REDMINE_API_KEY=config-token\n",
        encoding="utf-8",
    )
    mock_fetch.return_value = None
    code = main(["--date", "2026-01-01--2026-01-31", "--config", str(config_path)])
    assert code == 0


@mock.patch.dict(os.environ, VALID_ENV, clear=True)
@mock.patch("redmine_reporter.cli.fetch_issues_with_spent_time")
def test_cli_summary_flag_prints_totals(mock_fetch, capsys):
    """--summary выводит общее время и разбивку по проектам в stderr."""
    issue = _MockIssue()
    mock_fetch.return_value = [(issue, 1.0)]
    main(["--date", "2026-01-01--2026-01-31", "--summary"])
    captured = capsys.readouterr()
    assert "Total time" in captured.err
    assert "Project" in captured.err or "Project" in captured.out


@mock.patch.dict(os.environ, VALID_ENV, clear=True)
@mock.patch("redmine_reporter.cli.fetch_issues_with_spent_time")
def test_total_issues_message_goes_to_stderr(mock_fetch, capsys):
    """«Total issues» пишется в stderr, не загрязняя stdout при pipe (#28)."""
    issue = _MockIssue()
    mock_fetch.return_value = [(issue, 1.0)]
    main(["--date", "2026-01-01--2026-01-31"])
    captured = capsys.readouterr()
    assert "Total issues" not in captured.out
    assert "Total issues" in captured.err


@mock.patch.dict(os.environ, VALID_ENV, clear=True)
@mock.patch("redmine_reporter.cli.fetch_issues_with_spent_time")
def test_cli_no_time_passed_to_formatter(mock_fetch, tmp_path):
    """CLI --no-time передаётся в файловый форматтер."""
    issue = _MockIssue()
    mock_fetch.return_value = [(issue, 1.0)]

    output = str(tmp_path / "report.xlsx")
    with mock.patch("redmine_reporter.cli.get_formatter_by_extension") as mock_get_formatter:
        mock_formatter = mock.MagicMock()
        mock_get_formatter.return_value = mock_formatter
        main(["--date", "2026-01-01--2026-01-31", "--output", output, "--no-time"])

    _, kwargs = mock_get_formatter.call_args
    assert kwargs.get("no_time") is True