"""
Unit test module for kumolocal.py local network detection functionality.

This test module focuses on testing the local network detection logic
without requiring actual kumolocal devices.
"""

# built-in imports
import copy
import logging
import unittest

# local imports
from thermostatsupervisor import kumolocal
from thermostatsupervisor import kumolocal_config
from tests import unit_test_common as utc


class LocalNetworkDetectionUnitTest(utc.UnitTest):
    """
    Unit tests for local network detection functionality.
    """

    def setUp(self):
        """Setup for unit tests."""
        super().setUp()
        self.print_test_name()

        # Reset metadata to initial state
        self.original_metadata = copy.deepcopy(kumolocal_config.metadata)

    def tearDown(self):
        """Cleanup after unit tests."""
        # Restore original metadata
        kumolocal_config.metadata.clear()
        kumolocal_config.metadata.update(self.original_metadata)
        super().tearDown()

    def test_metadata_has_local_net_available_field(self):
        """Test that metadata includes local_net_available field."""
        for zone_id in kumolocal_config.metadata:
            self.assertIn("local_net_available", kumolocal_config.metadata[zone_id])
            # Should be None initially
            self.assertIsNone(kumolocal_config.metadata[zone_id]["local_net_available"])

    def test_local_network_detection_method_signature(self):
        """Test that detect_local_network_availability method can be called."""
        # This is a simple test to verify the method signature exists
        # without requiring pykumo or actual network detection

        # Create a mock thermostat class to test the method exists
        class MockThermostat:
            """
            Mock class for simulating a Thermostat object in unit tests.
            Attributes:
                verbose (bool): Flag to enable verbose output.
            Methods:
                detect_local_network_availability():
                    Mock implementation for testing local network availability
                    detection.
            """

            def __init__(self):
                self.verbose = False

            def detect_local_network_availability(self):
                """Mock implementation for testing."""
                # Just verify we can call this method
                pass

        mock_thermostat = MockThermostat()

        # Test method exists and can be called
        try:
            mock_thermostat.detect_local_network_availability()
        except Exception as e:
            self.fail(f"detect_local_network_availability method failed: {e}")

    def test_is_local_network_available_method_signature(self):
        """Test that is_local_network_available method has correct signature."""
        # This tests the method signature without requiring actual kumolocal
        try:
            # Create a mock thermostat class to test the method exists
            class MockThermostat:
                """
                MockThermostat is a mock class used for testing thermostat
                functionality.
                Attributes:
                    zone_number (int): The zone number associated with the thermostat.
                Methods:
                    is_local_network_available(zone=None):
                        Checks if the local network is available for the specified zone.
                        If no zone is provided, uses the instance's zone_number.
                        Returns True if the local network is available, False otherwise.
                """

                def __init__(self):
                    self.zone_number = 0

                def is_local_network_available(self, zone=None):
                    """Mock implementation for testing."""
                    zone_number = zone if zone is not None else self.zone_number
                    if zone_number in kumolocal_config.metadata:
                        value = kumolocal_config.metadata[zone_number].get(
                            "local_net_available", False
                        )
                        # Handle case where value is None (not yet detected)
                        return value if value is not None else False
                    return False

            mock_thermostat = MockThermostat()

            # Test method exists and returns expected type
            result = mock_thermostat.is_local_network_available()
            self.assertIsInstance(result, bool)
            self.assertFalse(result)  # Should be False for None value

        except ImportError:
            self.skipTest("kumolocal module not available for testing")

    def test_pykumo_logging_integration(self):
        """Test that pykumo logging integration can be initialized."""
        try:
            # Mock the utilities module to capture log messages
            captured_logs = []

            class MockUtil:
                """
                MockUtil is a mock utility class for logging messages during testing.
                Attributes:
                    DATA_LOG (int): Constant representing data log mode.
                    STDERR_LOG (int): Constant representing standard error log mode.
                    DEBUG_LOG (int): Constant representing debug log mode.
                Methods:
                    log_msg(msg, mode, func_name=None, file_name=None):
                            func_name (str, optional): Name of the function where the
                                                     log originated. Defaults to None.
                            file_name (str, optional): Name of the file where the log
                                                       originated. Defaults to None.
                """

                DATA_LOG = 1
                STDERR_LOG = 2
                DEBUG_LOG = 4

                @staticmethod
                def log_msg(msg, mode, func_name=None, file_name=None):
                    """
                    Logs a message with additional context information.

                    Appends a dictionary containing the message, mode, function name,
                    and file name to the captured_logs list.

                    Args:
                        msg (str): The log message to record.
                        mode (str): The logging mode or level (e.g., 'info', 'error').
                        func_name (str, optional): Name of the function where the log
                                                   originated. Defaults to None.
                        file_name (str, optional): Name of the file where the log
                                                   originated. Defaults to None.
                    """
                    captured_logs.append(
                        {
                            "msg": msg,
                            "mode": mode,
                            "func_name": func_name,
                            "file_name": file_name,
                        }
                    )

            # Temporarily replace util module
            original_util = kumolocal.util
            kumolocal.util = MockUtil

            try:
                # Test that we can create the SupervisorLogHandler
                handler = kumolocal.SupervisorLogHandler()
                self.assertIsInstance(handler, logging.Handler)

                # Test logging with the handler
                record = logging.LogRecord(
                    name="test",
                    level=logging.INFO,
                    pathname="",
                    lineno=0,
                    msg="Test message",
                    args=(),
                    exc_info=None,
                )
                handler.emit(record)

                # Verify that a log message was captured
                self.assertTrue(len(captured_logs) > 0)
                self.assertIn("[pykumo]", captured_logs[0]["msg"])
                self.assertEqual("kumo_log.txt", captured_logs[0]["file_name"])

            finally:
                # Restore original util module
                kumolocal.util = original_util

        except ImportError:
            self.skipTest("kumolocal module not available for testing")


class KeyErrorHandlingUnitTest(utc.UnitTest):
    """
    Unit tests for enhanced KeyError handling in kumolocal.py.

    Tests the improved error handling when accessing nested JSON structures
    that can fail after temperature setting operations.
    """

    def setUp(self):
        """Setup for KeyError handling tests."""
        super().setUp()
        self.print_test_name()

    def test_enhanced_keyerror_messages_are_informative(self):
        """Test that the enhanced error handling creates informative messages."""
        # Test case 1: None raw data
        test_cases = [
            {
                "name": "Raw JSON data is None",
                "raw_data": None,
                "serial_list": ["test_serial"],
                "expected_msg": "Raw JSON data is None",
            },
            {
                "name": "Insufficient data length",
                "raw_data": [1, 2],
                "serial_list": ["test_serial"],
                "expected_msg": "expected at least 3 elements, got 2",
            },
            {
                "name": "Missing children key",
                "raw_data": [1, 2, {"no_children": True}],
                "serial_list": ["test_serial"],
                "expected_msg": "Missing 'children' key",
            },
            {
                "name": "Empty children array",
                "raw_data": [1, 2, {"children": []}],
                "serial_list": ["test_serial"],
                "expected_msg": "Empty 'children' array",
            },
            {
                "name": "Missing zoneTable key",
                "raw_data": [1, 2, {"children": [{"no_zonetable": True}]}],
                "serial_list": ["test_serial"],
                "expected_msg": "Missing 'zoneTable' key",
            },
            {
                "name": "Missing zone serial",
                "raw_data": [1, 2, {"children": [{"zoneTable": {"other_serial": {}}}]}],
                "serial_list": ["test_serial"],
                "expected_msg": "Zone serial number 'test_serial' not found",
            },
        ]

        # For each test case, verify the error handling logic would work
        for test_case in test_cases:
            with self.subTest(test_case=test_case["name"]):
                self.assertTrue(
                    self._would_generate_expected_error(
                        test_case["raw_data"],
                        test_case["serial_list"],
                        test_case["expected_msg"],
                    ),
                    f"Test case '{test_case['name']}' should generate "
                    "expected error message",
                )

    def _would_generate_expected_error(self, raw_data, serial_list, expected_msg):
        """
        Simulate the error handling logic to test expected error generation.

        This method replicates the error checking logic from the enhanced
        get_kumocloud_thermostat_metadata method without requiring a full
        ThermostatClass instance.
        """
        try:
            zone = 0

            # Replicate the error checking logic
            if raw_data is None:
                raise KeyError(
                    "Raw JSON data is None - likely authentication "
                    "or connection issue"
                )

            if len(raw_data) <= 2:
                raise KeyError(
                    f"Raw JSON data structure invalid - expected "
                    f"at least 3 elements, got {len(raw_data)}"
                )

            level_2_data = raw_data[2]
            if "children" not in level_2_data:
                raise KeyError("Missing 'children' key in raw JSON data at level 2")

            children_data = level_2_data["children"]
            if not children_data or len(children_data) == 0:
                raise KeyError("Empty 'children' array in raw JSON data")

            first_child = children_data[0]
            if "zoneTable" not in first_child:
                raise KeyError(
                    "Missing 'zoneTable' key in first child of raw JSON data"
                )

            zone_table = first_child["zoneTable"]
            zone_serial = serial_list[zone]
            if zone_serial not in zone_table:
                available_zones = list(zone_table.keys())
                raise KeyError(
                    f"Zone serial number '{zone_serial}' not found "
                    f"in zoneTable. Available zones: {available_zones}"
                )

            # If we get here, no error should be generated
            return False

        except KeyError as e:
            error_msg = str(e)
            return expected_msg in error_msg

        return False


if __name__ == "__main__":
    unittest.main(verbosity=2)
