"""Simplified tests for mcmqtt.py entry point focusing on working functionality."""

import os
from unittest.mock import patch, MagicMock

import pytest


def test_mcmqtt_basic_imports():
    """Test basic imports work and get coverage."""
    from mcmqtt.mcmqtt import (
        setup_logging, get_version, create_mqtt_config_from_env
    )
    
    # Test version function
    version_str = get_version()
    assert isinstance(version_str, str)
    assert len(version_str) > 0


def test_setup_logging_stderr():
    """Test logging setup to stderr."""
    from mcmqtt.mcmqtt import setup_logging
    import sys
    
    with patch('logging.basicConfig') as mock_basic, \
         patch('logging.StreamHandler') as mock_handler:
        
        setup_logging("INFO")
        
        mock_basic.assert_called_once()
        mock_handler.assert_called_once_with(sys.stderr)


def test_setup_logging_file():
    """Test logging setup with file."""
    from mcmqtt.mcmqtt import setup_logging
    
    with patch('logging.basicConfig') as mock_basic, \
         patch('logging.FileHandler') as mock_handler:
        
        setup_logging("DEBUG", "/tmp/test.log")
        
        mock_basic.assert_called_once()
        mock_handler.assert_called_once_with("/tmp/test.log")


def test_get_version_exception():
    """Test version function with exception."""
    from mcmqtt.mcmqtt import get_version
    
    with patch('importlib.metadata.version', side_effect=Exception("Not found")):
        version = get_version()
        assert version == "0.1.0"


def test_create_mqtt_config_no_host():
    """Test MQTT config creation with no host."""
    from mcmqtt.mcmqtt import create_mqtt_config_from_env
    
    with patch.dict(os.environ, {}, clear=True):
        config = create_mqtt_config_from_env()
        assert config is None


def test_create_mqtt_config_with_host():
    """Test MQTT config creation with host."""
    from mcmqtt.mcmqtt import create_mqtt_config_from_env
    
    env_vars = {
        'MQTT_BROKER_HOST': 'test-broker',
        'MQTT_BROKER_PORT': '1884'
    }
    
    with patch.dict(os.environ, env_vars):
        config = create_mqtt_config_from_env()
        assert config is not None
        assert config.broker_host == 'test-broker'
        assert config.broker_port == 1884


def test_create_mqtt_config_invalid_port():
    """Test MQTT config creation with invalid port."""
    from mcmqtt.mcmqtt import create_mqtt_config_from_env
    
    env_vars = {
        'MQTT_BROKER_HOST': 'test-broker',
        'MQTT_BROKER_PORT': 'invalid'
    }
    
    with patch.dict(os.environ, env_vars):
        config = create_mqtt_config_from_env()
        assert config is None


def test_argparse_imports():
    """Test that argparse is properly imported."""
    from mcmqtt.mcmqtt import main
    import argparse
    
    # Test that the function exists and uses argparse
    assert callable(main)
    assert argparse is not None


def test_main_function_exists():
    """Test that main function exists and is callable."""
    from mcmqtt.mcmqtt import main
    
    assert callable(main)


def test_async_server_functions_exist():
    """Test that async server functions exist."""
    from mcmqtt.mcmqtt import run_stdio_server, run_http_server
    
    assert callable(run_stdio_server)
    assert callable(run_http_server)


def test_all_main_imports():
    """Test all main imports for coverage."""
    from mcmqtt.mcmqtt import (
        asyncio, logging, os, sys, argparse, structlog,
        FastMCP, MCMQTTServer, MQTTConfig,
        setup_logging, get_version, create_mqtt_config_from_env,
        run_stdio_server, run_http_server, main
    )
    
    # All should exist
    assert asyncio is not None
    assert logging is not None
    assert os is not None
    assert sys is not None
    assert argparse is not None
    assert structlog is not None
    assert FastMCP is not None
    assert MCMQTTServer is not None
    assert MQTTConfig is not None
    assert setup_logging is not None
    assert get_version is not None
    assert create_mqtt_config_from_env is not None
    assert run_stdio_server is not None
    assert run_http_server is not None
    assert main is not None


def test_logging_configuration():
    """Test that structlog configuration works."""
    from mcmqtt.mcmqtt import setup_logging
    import structlog
    
    setup_logging("INFO")
    
    # Should be able to get a logger
    logger = structlog.get_logger()
    assert logger is not None