"""Фабрика горячей папки `create_hotfolder(settings)` (R-6, D-1, slice-0-skeleton): режим из `SCAN_HOTFOLDER_MODE`,
модуль `src.gateway.smb` импортируется только в режиме `smb`."""

import subprocess
import sys
from pathlib import Path

import pytest

from src.core.config import Settings, SMBSettings, get_settings
from src.gateway import create_hotfolder
from src.gateway.hotfolder import LocalHotFolder

API_DIR = Path(__file__).resolve().parents[2]


def _local_settings(root: Path) -> Settings:
    return get_settings().model_copy(
        update={
            "SCAN_HOTFOLDER_MODE": "local",
            "SCAN_HOTFOLDER_PATH": str(root),
            "SCAN_INPUT_DIR": "In",
            "SCAN_TMP_DIR": "Служебный",
            "SCAN_SETTLE_SECONDS": 1.5,
        }
    )


def _smb_settings() -> Settings:
    settings = get_settings()
    smb = SMBSettings(SMB_HOST="smb.example.local", SMB_PATH="share/scan", SMB_LOGIN="user", SMB_PASSWORD="secret")
    return settings.model_copy(
        update={
            "SCAN_HOTFOLDER_MODE": "smb",
            "SCAN_OUTPUT_DIR": "Out",
            "SCAN_TMP_DIR": "T",
            "SCAN_SETTLE_SECONDS": 3,
            "OPENBAO": settings.OPENBAO.model_copy(update={"SMB": smb}),
        }
    )


def test_local_mode_builds_local_hotfolder(tmp_path: Path) -> None:
    hf = create_hotfolder(_local_settings(tmp_path))
    assert isinstance(hf, LocalHotFolder)
    assert hf.root == tmp_path
    assert hf.input_dir == tmp_path / "In"
    assert hf.output_dir == tmp_path / "Output"
    assert hf.tmp_dir == tmp_path / "Служебный"
    assert hf.settle_seconds == 1.5
    assert hf.healthy() is True


def test_smb_mode_builds_smb_hotfolder() -> None:
    from src.gateway.smb import SmbHotFolder  # noqa: PLC0415 — импорт смб-модуля только в этом тесте

    hf = create_hotfolder(_smb_settings())
    assert isinstance(hf, SmbHotFolder)
    assert hf.root == "\\\\smb.example.local\\share\\scan"
    assert hf.input_dir == "\\\\smb.example.local\\share\\scan\\Input"
    assert hf.output_dir == "\\\\smb.example.local\\share\\scan\\Out"
    assert hf.tmp_dir == "\\\\smb.example.local\\share\\scan\\T"
    assert hf.settle_seconds == 3


def test_smb_mode_does_not_touch_share(monkeypatch: pytest.MonkeyPatch) -> None:
    from src.gateway import smb  # noqa: PLC0415

    def forbidden(*args: object, **kwargs: object) -> None:
        raise AssertionError("фабрика не должна обращаться к SMB")

    for name in ("open_file", "listdir", "scandir", "mkdir", "replace", "remove", "register_session"):
        monkeypatch.setattr(smb.smbclient, name, forbidden)
    create_hotfolder(_smb_settings())


def test_unknown_mode_is_rejected(tmp_path: Path) -> None:
    settings = _local_settings(tmp_path).model_copy(update={"SCAN_HOTFOLDER_MODE": "ftp"})
    with pytest.raises(ValueError, match="SCAN_HOTFOLDER_MODE"):
        create_hotfolder(settings)


def test_local_mode_does_not_import_smb_module(tmp_path: Path) -> None:
    """Отдельный интерпретатор: в процессе pytest модуль мог быть импортирован другими тестами."""
    code = "\n".join(
        [
            "import sys",
            "from src.core.config import get_settings",
            "from src.gateway import create_hotfolder",
            f"settings = get_settings().model_copy(update={{'SCAN_HOTFOLDER_PATH': {str(tmp_path)!r}}})",
            "hf = create_hotfolder(settings)",
            "assert settings.SCAN_HOTFOLDER_MODE == 'local'",
            "assert type(hf).__name__ == 'LocalHotFolder', type(hf)",
            "loaded = sorted(m for m in sys.modules if m.startswith('src.gateway'))",
            "assert 'src.gateway.smb' not in sys.modules, loaded",
            "print(loaded)",
        ]
    )
    result = subprocess.run(
        [sys.executable, "-c", code], cwd=API_DIR, capture_output=True, text=True, check=False, timeout=60
    )
    assert result.returncode == 0, result.stderr
    assert "src.gateway.hotfolder" in result.stdout


def test_smb_mode_imports_smb_module_lazily() -> None:
    """Контроль предыдущего теста: в режиме smb тот же сценарий импортирует `src.gateway.smb`."""
    code = "\n".join(
        [
            "import sys",
            "from src.core.config import SMBSettings, get_settings",
            "from src.gateway import create_hotfolder",
            "assert 'src.gateway.smb' not in sys.modules",
            "s = get_settings()",
            "smb = SMBSettings(SMB_HOST='h', SMB_PATH='share', SMB_LOGIN='u', SMB_PASSWORD='p')",
            "openbao = s.OPENBAO.model_copy(update={'SMB': smb})",
            "s = s.model_copy(update={'SCAN_HOTFOLDER_MODE': 'smb', 'OPENBAO': openbao})",
            "hf = create_hotfolder(s)",
            "assert type(hf).__name__ == 'SmbHotFolder', type(hf)",
            "assert 'src.gateway.smb' in sys.modules",
        ]
    )
    result = subprocess.run(
        [sys.executable, "-c", code], cwd=API_DIR, capture_output=True, text=True, check=False, timeout=60
    )
    assert result.returncode == 0, result.stderr