"""Test configuration loading.

Verifies that config.py loads the JSON config and applies defaults
the same way startup.js does.
"""

import json
import os
import tempfile

import pytest
from cteward_ng.config import load_config


class TestLoadConfig:
    def test_loads_json_file(self):
        with tempfile.NamedTemporaryFile(
            mode='w', suffix='.json', delete=False
        ) as fh:
            json.dump({'mssql': {'password': 'test'}}, fh)
            fh.flush()
            config = load_config(fh.name)
            os.unlink(fh.name)

        assert config['mssql']['password'] == 'test'

    def test_applies_defaults(self):
        with tempfile.NamedTemporaryFile(
            mode='w', suffix='.json', delete=False
        ) as fh:
            json.dump({}, fh)
            fh.flush()
            config = load_config(fh.name)
            os.unlink(fh.name)

        assert 'mssql' in config
        assert 'server' in config
        assert 'auth' in config
        assert 'bots' in config['auth']
        assert 'flags' in config['auth']

    def test_missing_file_returns_defaults(self):
        config = load_config('/nonexistent/path.json')
        assert 'mssql' in config
        assert 'server' in config
        assert 'auth' in config

    def test_invalid_json_returns_defaults(self):
        with tempfile.NamedTemporaryFile(
            mode='w', suffix='.json', delete=False
        ) as fh:
            fh.write('{invalid json}')
            fh.flush()
            config = load_config(fh.name)
            os.unlink(fh.name)

        assert 'mssql' in config
        assert 'server' in config
        assert 'auth' in config