"""Tests for ftp_server module."""

import pytest
from unittest.mock import patch, MagicMock


@pytest.fixture(autouse=True)
def mock_pyftpdlib():
    """Mock pyftpdlib modules which are not available on Python 3.12+."""
    with patch.dict("sys.modules", {
        "pyftpdlib": MagicMock(),
        "pyftpdlib.authorizers": MagicMock(),
        "pyftpdlib.handlers": MagicMock(),
        "pyftpdlib.servers": MagicMock(),
    }):
        from factsdb.ftp_server import FTPServerManager, get_ftp_server_manager
        yield


class MockConfig:
    """Lightweight mock Config for FTP tests."""

    def __init__(self):
        self.ftp_server = MagicMock()
        self.ftp_server.host = "0.0.0.0"
        self.ftp_server.port = 2121
        self.ftp_server.username = "testuser"
        self.ftp_server.password = "testpass"
        self.database = MagicMock()


class TestFTPServerManager:
    def test_init(self, mock_pyftpdlib):
        from factsdb.ftp_server import FTPServerManager
        mgr = FTPServerManager(MockConfig())
        assert mgr.is_running is False
        assert mgr.onboarded_directories == set()
        assert mgr.server is None

    def test_add_onboarded_directory(self, mock_pyftpdlib, tmp_path):
        from factsdb.ftp_server import FTPServerManager
        mgr = FTPServerManager(MockConfig())
        mgr.add_onboarded_directory(str(tmp_path))
        assert str(tmp_path) in mgr.onboarded_directories

    def test_add_nonexistent_directory(self, mock_pyftpdlib, tmp_path):
        from factsdb.ftp_server import FTPServerManager
        mgr = FTPServerManager(MockConfig())
        mgr.add_onboarded_directory("/nonexistent/path")
        assert len(mgr.onboarded_directories) == 0

    def test_is_directory_allowed(self, mock_pyftpdlib, tmp_path):
        from factsdb.ftp_server import FTPServerManager
        mgr = FTPServerManager(MockConfig())
        mgr.add_onboarded_directory(str(tmp_path))
        assert mgr.is_directory_allowed(str(tmp_path)) is True
        assert mgr.is_directory_allowed("/other/path") is False

    def test_is_directory_subpath(self, mock_pyftpdlib, tmp_path):
        from factsdb.ftp_server import FTPServerManager
        mgr = FTPServerManager(MockConfig())
        mgr.add_onboarded_directory(str(tmp_path))
        sub = tmp_path / "sub"
        assert mgr.is_directory_allowed(str(sub)) is True

    def test_get_onboarded_directories(self, mock_pyftpdlib, tmp_path):
        from factsdb.ftp_server import FTPServerManager
        mgr = FTPServerManager(MockConfig())
        mgr.add_onboarded_directory(str(tmp_path))
        dirs = mgr.get_onboarded_directories()
        assert len(dirs) == 1
        assert str(tmp_path) in dirs

    def test_is_running_attr(self, mock_pyftpdlib):
        from factsdb.ftp_server import FTPServerManager
        mgr = FTPServerManager(MockConfig())
        assert mgr.is_running is False


class TestFTPServerStartStop:
    def test_start_already_running(self, mock_pyftpdlib):
        from factsdb.ftp_server import FTPServerManager
        mgr = FTPServerManager(MockConfig())
        mgr.is_running = True
        mgr.server = MagicMock()
        mgr.start()
        assert mgr.is_running is True


class TestGetFtpServerManager:
    def test_singleton(self, mock_pyftpdlib):
        from factsdb import ftp_server as ftp_mod
        ftp_mod._ftp_server_manager = None
        from factsdb.ftp_server import FTPServerManager, get_ftp_server_manager
        cfg = MockConfig()
        m1 = get_ftp_server_manager(cfg)
        m2 = get_ftp_server_manager(cfg)
        assert m1 is m2
        ftp_mod._ftp_server_manager = None