from textwrap import dedent
from unittest import mock

import black
import isort
import pytest

from bec_widgets.cli.generate_cli import ClientGenerator
from bec_widgets.utils.plugin_utils import BECClassContainer, BECClassInfo

# pylint: disable=missing-function-docstring


# Mock classes to test the generator
class MockBECWaveform1D:
    USER_ACCESS = ["set_frequency", "set_amplitude"]

    def set_frequency(self, frequency: float) -> list:
        """Set the frequency of the waveform."""
        return [frequency]

    def set_amplitude(self, amplitude: float) -> tuple[float, float]:
        """Set the amplitude of the waveform."""
        return amplitude, amplitude


class MockBECFigure:
    USER_ACCESS = ["add_plot", "remove_plot"]

    def add_plot(self, plot_id: str):
        """Add a plot to the figure."""

    def remove_plot(self, plot_id: str):
        """Remove a plot from the figure."""


def test_client_generator_with_black_formatting():
    generator = ClientGenerator(base=True)
    container = BECClassContainer()
    container.add_class(
        BECClassInfo(
            name="MockBECWaveform1D",
            module="test_module",
            file="test_file",
            obj=MockBECWaveform1D,
            is_connector=True,
            is_widget=True,
            is_plugin=False,
        )
    )
    container.add_class(
        BECClassInfo(
            name="MockBECFigure",
            module="test_module",
            file="test_file",
            obj=MockBECFigure,
            is_connector=True,
            is_widget=True,
            is_plugin=True,
        )
    )

    generator.generate_client(container)

    # Format the expected output with black to ensure it matches the generator output
    expected_output = dedent(
        '''\
        # This file was automatically generated by generate_cli.py
        # type: ignore

        from __future__ import annotations

        import enum
        import inspect
        import traceback
        from functools import reduce
        from operator import add
        from typing import Literal, Optional

        from bec_lib.logger import bec_logger

        from bec_widgets.cli.rpc.rpc_base import RPCBase, rpc_call
        from bec_widgets.utils.bec_plugin_helper import (get_all_plugin_widgets,
                                                        get_plugin_client_module)

        logger = bec_logger.logger

        # pylint: skip-file


        class _WidgetsEnumType(str, enum.Enum):
            """Enum for the available widgets, to be generated programatically"""

            ...

        _Widgets = {
            "MockBECFigure": "MockBECFigure",
        }

        
        try:
            _plugin_widgets = get_all_plugin_widgets()
            plugin_client = get_plugin_client_module()
            Widgets = _WidgetsEnumType("Widgets", {name: name for name in _plugin_widgets} | _Widgets)

            if (_overlap := _Widgets.keys() & _plugin_widgets.keys()) != set():
                for _widget in _overlap:
                    logger.warning(f"Detected duplicate widget {_widget} in plugin repo file: {inspect.getfile(_plugin_widgets[_widget])} !")
            for plugin_name, plugin_class in inspect.getmembers(plugin_client, inspect.isclass):
                if issubclass(plugin_class, RPCBase) and plugin_class is not RPCBase:
                    if plugin_name in globals():
                        conflicting_file = (
                            inspect.getfile(_plugin_widgets[plugin_name])
                            if plugin_name in _plugin_widgets
                            else f"{plugin_client}"
                        )
                        logger.warning(
                            f"Plugin widget {plugin_name} from {conflicting_file} conflicts with a built-in class!"
                        )
                        continue
                    if plugin_name not in _overlap:
                        globals()[plugin_name] = plugin_class
        except ImportError as e:
            logger.error(f"Failed loading plugins: \\n{reduce(add, traceback.format_exception(e))}")

        class MockBECFigure(RPCBase):
            @rpc_call
            def add_plot(self, plot_id: str):
                """
                Add a plot to the figure.
                """

            @rpc_call
            def remove_plot(self, plot_id: str):
                """
                Remove a plot from the figure.
                """


        class MockBECWaveform1D(RPCBase):
            @rpc_call
            def set_frequency(self, frequency: float) -> list:
                """
                Set the frequency of the waveform.
                """

            @rpc_call
            def set_amplitude(self, amplitude: float) -> tuple[float, float]:
                """
                Set the amplitude of the waveform.
                """
    '''
    )

    expected_output_formatted = black.format_str(
        expected_output, mode=black.FileMode(line_length=100)
    ).lstrip()

    generated_output_formatted = black.format_str(
        generator.header + "\n" + generator.content, mode=black.FileMode(line_length=100)
    )

    generated_output_formatted = isort.code(generated_output_formatted)
    expected_output_formatted = isort.code(expected_output_formatted)

    assert expected_output_formatted == generated_output_formatted


def test_client_generator_init():
    """
    Test the initialization of the ClientGenerator class.
    """
    generator = ClientGenerator()
    assert generator.header.startswith("# This file was automatically generated by generate_cli.py")
    assert generator.content == ""


def test_generate_client():
    """
    Test the generate_client method of the ClientGenerator class.
    """
    generator = ClientGenerator()
    class_container = mock.MagicMock(spec=BECClassContainer)
    class_container.rpc_top_level_classes = [mock.MagicMock(RPC=True, __name__="TestClass1")]
    class_container.connector_classes = [mock.MagicMock(RPC=True, __name__="TestClass2")]

    generator.generate_client(class_container)

    assert '"TestClass1": "TestClass1"' in generator.content
    assert "class TestClass2(RPCBase):" in generator.content


@pytest.mark.parametrize("plugin", (True, False))
def test_write_client_enum(plugin):
    """
    Test the write_client_enum method of the ClientGenerator class.
    """
    generator = ClientGenerator(base=plugin)
    published_classes = [
        mock.MagicMock(__name__="TestClass1"),
        mock.MagicMock(__name__="TestClass2"),
    ]

    generator.write_client_enum(published_classes)

    assert ("class _WidgetsEnumType(str, enum.Enum):" in generator.content) is plugin
    assert '"TestClass1": "TestClass1",' in generator.content
    assert '"TestClass2": "TestClass2",' in generator.content


def test_generate_content_for_class():
    """
    Test the generate_content_for_class method of the ClientGenerator class.
    """
    generator = ClientGenerator()
    cls = mock.MagicMock(__name__="TestClass", USER_ACCESS=["method1"])
    method = mock.MagicMock()
    method.__name__ = "method1"
    method.__doc__ = "Test method"
    method_signature = "(self)"
    cls.method1 = method

    with mock.patch("inspect.signature", return_value=method_signature):
        generator.generate_content_for_class(cls)

    assert "class TestClass(RPCBase):" in generator.content
    assert "def method1(self):" in generator.content
    assert "Test method" in generator.content


def test_write_is_black_formatted(tmp_path):
    """
    Test the write method of the ClientGenerator class.
    """
    generator = ClientGenerator()
    generator.content = """
def test_content():
  pass

a=1
b=2
c=a+b
"""

    corrected = """def test_content():
    pass


a = 1
b = 2
c = a + b"""
    file_name = tmp_path / "test_client.py"

    generator.write(str(file_name))

    with open(file_name, "r", encoding="utf-8") as file:
        content = file.read()

    assert corrected in content