"""Tests for the CLI module."""

import os
import sys
from pathlib import Path
from unittest.mock import MagicMock, patch
from typing import Callable

import pytest

from hanzo_mcp.cli import install_claude_desktop_config, main


class TestCLI:
    """Test the CLI module."""

    def test_main_server_run(self) -> None:
        """Test the main function running the server."""
        with (
            patch("argparse.ArgumentParser.parse_args") as mock_parse_args,
            patch("hanzo_mcp.cli.HanzoMCPServer") as mock_server_class,
        ):
            # Mock parsed arguments
            mock_args = MagicMock()
            mock_args.name = "test-server"
            mock_args.transport = "stdio"
            mock_args.allowed_paths = ["/test/path"]
            mock_args.project_dir = "/test/project"
            mock_args.install = False
            mock_args.llm_provider = "auto"
            mock_args.enhanced_thinking = True
            mock_args.external_servers = True
            mock_args.external_servers_config = None
            mock_parse_args.return_value = mock_args

            # Mock server instance
            mock_server = MagicMock()
            mock_server_class.return_value = mock_server

            # Call main
            main()

            # Verify server was created with correct arguments
            # Project dir should be added to allowed paths
            expected_paths = ["/test/path", "/test/project"]
            mock_server_class.assert_called_once_with(
                name="test-server", allowed_paths=expected_paths, enable_external_servers=True
            )
            mock_server.run.assert_called_once_with(transport="stdio")

    def test_main_with_install(self) -> None:
        """Test the main function with install option."""
        with (
            patch("argparse.ArgumentParser.parse_args") as mock_parse_args,
            patch("hanzo_mcp.cli.install_claude_desktop_config") as mock_install,
        ):
            # Mock parsed arguments
            mock_args = MagicMock()
            mock_args.name = "test-server"
            mock_args.install = True
            mock_args.allowed_paths = ["/test/path"]
            mock_parse_args.return_value = mock_args

            # Call main
            main()

            # Verify install function was called
            mock_install.assert_called_once_with("test-server", ["/test/path"])

    def test_main_without_allowed_paths(self) -> None:
        """Test the main function without specified allowed paths."""
        with (
            patch("argparse.ArgumentParser.parse_args") as mock_parse_args,
            patch("hanzo_mcp.cli.HanzoMCPServer") as mock_server_class,
            patch("os.getcwd", return_value="/current/dir"),
        ):
            # Mock parsed arguments
            mock_args = MagicMock()
            mock_args.name = "test-server"
            mock_args.transport = "stdio"
            mock_args.allowed_paths = None
            mock_args.project_dir = None
            mock_args.install = False
            mock_args.llm_provider = "auto"
            mock_args.enhanced_thinking = True
            mock_args.external_servers = True
            mock_args.external_servers_config = None
            mock_parse_args.return_value = mock_args

            # Mock server instance
            mock_server = MagicMock()
            mock_server_class.return_value = mock_server

            # Call main
            main()

            # Verify server was created with current directory as allowed path
            mock_server_class.assert_called_once_with(
                name="test-server", allowed_paths=["/current/dir"], enable_external_servers=True
            )
            mock_server.run.assert_called_once_with(transport="stdio")


class TestInstallClaudeDesktopConfig:
    """Test the install_claude_desktop_config function."""

    @pytest.fixture
    def mock_platform(self, monkeypatch) -> Callable[[str], str]:
        """Mock the sys.platform value."""
        original_platform = sys.platform

        def _set_platform(plat):
            monkeypatch.setattr(sys, "platform", plat)
            return plat

        yield _set_platform

        # Restore original platform
        monkeypatch.setattr(sys, "platform", original_platform)

    def test_install_config_macos(
        self, mock_platform: Callable[[str], str], tmp_path: Path
    ) -> None:
        """Test installing config on macOS."""
        # Set platform to macOS
        mock_platform("darwin")

        # Mock home directory and config path
        with (
            patch("pathlib.Path.home", return_value=Path(tmp_path)),
            patch("sys.executable", "/usr/bin/python3"),
            patch("json.dump") as mock_json_dump,
            patch("builtins.open", create=True) as mock_open,
            patch("pathlib.Path.exists", return_value=False),
            patch("pathlib.Path.mkdir") as mock_mkdir,
        ):
            # Construct expected config path
            config_dir = tmp_path / "Library" / "Application Support" / "Claude"
            config_file = config_dir / "claude_desktop_config.json"

            # Mock file opening
            mock_file = MagicMock()
            mock_open.return_value.__enter__.return_value = mock_file

            # Call the install function
            install_claude_desktop_config("test-server", allowed_paths=["/test/path"])

            # Verify config directory was created
            mock_mkdir.assert_called_once_with(parents=True, exist_ok=True)

            # Verify file was opened correctly
            mock_open.assert_called_once()
            args, kwargs = mock_open.call_args
            assert str(config_file) in str(args[0])
            assert kwargs.get("mode") == "w"
            # Note: The mode parameter is set via a positional argument, not a keyword
            # so we're not checking it here

            # Verify correct config was written
            mock_json_dump.assert_called_once()
            config_data = mock_json_dump.call_args[0][0]
            assert "mcpServers" in config_data
            assert "test-server" in config_data["mcpServers"]
            assert (
                "/usr/bin/python3"
                in config_data["mcpServers"]["test-server"]["command"]
            )
            assert "--allow-path" in str(
                config_data["mcpServers"]["test-server"]["args"]
            )
            assert "/test/path" in str(config_data["mcpServers"]["test-server"]["args"])

    def test_install_config_windows(
        self, mock_platform: Callable[[str], str], tmp_path: Path
    ) -> None:
        """Test installing config on Windows."""
        # Set platform to Windows
        mock_platform("win32")

        # Mock environment variable
        with (
            patch.dict(os.environ, {"APPDATA": str(tmp_path)}),
            patch("sys.executable", "C:\\Python\\python.exe"),
            patch("json.dump") as mock_json_dump,
            patch("builtins.open", create=True) as mock_open,
            patch("pathlib.Path.exists", return_value=False),
            patch("pathlib.Path.mkdir") as mock_mkdir,
        ):
            # Construct expected config path
            config_dir = Path(tmp_path) / "Claude"
            config_file = config_dir / "claude_desktop_config.json"

            # Mock file opening
            mock_file = MagicMock()
            mock_open.return_value.__enter__.return_value = mock_file

            # Call the install function
            install_claude_desktop_config("test-server")

            # Verify config directory was created
            mock_mkdir.assert_called_once_with(parents=True, exist_ok=True)

            # Verify file was opened correctly
            mock_open.assert_called_once()
            args, kwargs = mock_open.call_args
            assert str(config_file) in str(args[0])

            # Verify correct config was written
            mock_json_dump.assert_called_once()
            config_data = mock_json_dump.call_args[0][0]
            assert "mcpServers" in config_data
            assert "test-server" in config_data["mcpServers"]

    def test_install_config_merge_existing(
        self, mock_platform: Callable[[str], str], tmp_path: Path
    ) -> None:
        """Test merging with existing config file."""
        # Set platform to Linux
        mock_platform("linux")

        # Create a mock existing config
        existing_config = {
            "mcpServers": {
                "existing-server": {
                    "command": "/usr/bin/python3",
                    "args": ["-m", "existing_module"],
                }
            },
            "otherSetting": "value",
        }

        # Mock home directory and config path
        with (
            patch("pathlib.Path.home", return_value=Path(tmp_path)),
            patch("sys.executable", "/usr/bin/python3"),
            patch("json.dump") as mock_json_dump,
            patch("json.load", return_value=existing_config),
            patch("builtins.open", create=True) as mock_open,
            patch("pathlib.Path.exists", return_value=True),
            patch("pathlib.Path.mkdir") as mock_mkdir,
        ):
            # Construct expected config path
            config_dir = tmp_path / ".config" / "claude"
            config_dir / "claude_desktop_config.json"

            # Mock file opening
            mock_file = MagicMock()
            mock_open.return_value.__enter__.return_value = mock_file

            # Call the install function
            install_claude_desktop_config("test-server")

            # Verify config directory was created
            mock_mkdir.assert_called_once_with(parents=True, exist_ok=True)

            # Verify file was opened correctly for reading and writing
            assert mock_open.call_count == 2

            # Verify correct config was written
            mock_json_dump.assert_called_once()
            config_data = mock_json_dump.call_args[0][0]
            assert "mcpServers" in config_data
            assert "existing-server" in config_data["mcpServers"]
            assert "test-server" in config_data["mcpServers"]
            assert "otherSetting" in config_data

    def test_install_config_default_paths(
        self, mock_platform: Callable[[str], str], tmp_path: Path
    ) -> None:
        """Test installing config with default allowed paths."""
        # Set platform to macOS
        mock_platform("darwin")

        # Mock home directory and config path
        with (
            patch("pathlib.Path.home", return_value=Path(tmp_path)),
            patch("sys.executable", "/usr/bin/python3"),
            patch("json.dump") as mock_json_dump,
            patch("builtins.open", create=True) as mock_open,
            patch("pathlib.Path.exists", return_value=False),
            patch("pathlib.Path.mkdir"),
        ):
            # Mock file opening
            mock_file = MagicMock()
            mock_open.return_value.__enter__.return_value = mock_file

            # Call the install function without specifying allowed_paths
            install_claude_desktop_config("test-server")

            # Verify correct config was written with home directory as allowed path
            mock_json_dump.assert_called_once()
            config_data = mock_json_dump.call_args[0][0]
            server_args = config_data["mcpServers"]["test-server"]["args"]

            # Verify home directory was added as an allowed path
            assert "--allow-path" in server_args
            home_path_index = server_args.index("--allow-path") + 1
            assert str(tmp_path) in server_args[home_path_index]