"""Общие фикстуры тестов."""

import os
from collections.abc import Callable
from pathlib import Path

import pytest
from fixtures_helpers import (
    fixtures_skip_reason,
    osv_dkb_files,
    osv_dkb_golden_files,
    osv_fixture_files,
    resolve_fixtures_dir,
    synthetic_files,
    synthetic_skip_reason,
)

from src.core.config import Settings

# Переменные, которые читает Settings: убираются из окружения процесса, чтобы тест видел только свой файл
_SETTINGS_ENV_PREFIXES = (
    "OPENBAO__",
    "SERVER__",
    "DEBUG",
    "ROOT_PATH",
    "VERSION",
    "SERVICE_NAME",
    "NATS_ENABLED",
    "WORKER_CONCURRENCY",
    "PUBLISH_RETRIES",
    "DONE_CACHE_SIZE",
    "PARSE_MAX_BYTES",
    "PARSE_TIMEOUT_SECONDS",
)

# Минимальное окружение spec «Старт с минимальным окружением»: MinIO, адрес NATS и DEBUG; без seed/jwt, БД и SMB
MINIMAL_ENV = """\
DEBUG=true
OPENBAO__MINIO__MINIO_URL=localhost:9000
OPENBAO__MINIO__MINIO_ADMIN_LOGIN=minioadmin
OPENBAO__MINIO__MINIO_ADMIN_PASSWORD=minioadmin
OPENBAO__MINIO__MINIO_BUCKET=arm-ka
OPENBAO__NATS__NATS_URL=nats://localhost:4222
"""


@pytest.fixture
def minimal_settings(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> Callable[[str], Settings]:
    """Фабрика Settings только из временного `.env` с `MINIMAL_ENV` и строками `extra` (окружение процесса скрыто)."""
    for name in list(os.environ):
        if name.upper().startswith(_SETTINGS_ENV_PREFIXES):
            monkeypatch.delenv(name)

    def build(extra: str = "") -> Settings:
        env_file = tmp_path / ".env"
        env_file.write_text(MINIMAL_ENV + extra, encoding="utf-8")
        return Settings(_env_file=env_file)  # type: ignore[call-arg]

    return build


@pytest.fixture(scope="session")
def synthetic_dir(fixtures_dir: Path) -> Path:
    """`fixtures/osv/synthetic`; тест пропускается с причиной, если синтетики в каталоге нет."""
    reason = synthetic_skip_reason()
    if reason is not None:
        pytest.skip(reason)
    return fixtures_dir / "osv" / "synthetic"


@pytest.fixture(scope="session")
def fixtures_dir() -> Path:
    """Каталог `../fixtures`; тест пропускается с причиной, если каталога нет."""
    reason = fixtures_skip_reason()
    if reason is not None:
        pytest.skip(reason)
    return resolve_fixtures_dir()


def pytest_generate_tests(metafunc: pytest.Metafunc) -> None:
    """Параметры `osv_file` (реальные ОСВ), `dkb_file` (пакет ДКБ), `dkb_golden_file` (ДКБ до порога снимка) и
    `synthetic_file` (синтетика); без каталога — один параметр со skip."""
    sources = {
        "osv_file": (osv_fixture_files, fixtures_skip_reason),
        "dkb_file": (osv_dkb_files, fixtures_skip_reason),
        "dkb_golden_file": (osv_dkb_golden_files, fixtures_skip_reason),
        "synthetic_file": (synthetic_files, lambda: fixtures_skip_reason() or synthetic_skip_reason()),
    }
    for argname, (listing, skip_reason) in sources.items():
        if argname not in metafunc.fixturenames:
            continue
        reason = skip_reason()
        if reason is not None:
            metafunc.parametrize(
                argname, [pytest.param(None, marks=pytest.mark.skip(reason=reason))], ids=["нет-фикстур"]
            )
            continue
        root = resolve_fixtures_dir()
        files = listing(root)
        metafunc.parametrize(argname, files, ids=[path.relative_to(root).as_posix() for path in files])


def pytest_collection_modifyitems(config: pytest.Config, items: list[pytest.Item]) -> None:
    """Тесты с маркером `fixtures` пропускаются, если каталог фикстур недоступен."""
    reason = fixtures_skip_reason()
    if reason is None:
        return
    skip = pytest.mark.skip(reason=reason)
    for item in items:
        if item.get_closest_marker("fixtures"):
            item.add_marker(skip)