import tempfile
from click.testing import CliRunner
from unittest.mock import patch, MagicMock
from pathlib import Path
from src.cli.main import cli, visualize, complexity, deps, export


class TestCLI:
    def setup_method(self):
        self.runner = CliRunner()

    def test_cli_help(self):
        result = self.runner.invoke(cli, ["--help"])
        assert result.exit_code == 0
        assert "Usage:" in result.output

    @patch("src.cli.main._parse_files")
    @patch("src.cli.main._get_parser")
    def test_analyze_command(self, mock_get_parser, mock_parse_files):
        mock_parser = MagicMock()
        mock_get_parser.return_value = mock_parser

        mock_result = MagicMock()
        mock_result.file_path = Path("/test.py")
        mock_result.entities = []
        mock_result.imports = []
        mock_parse_files.return_value = [mock_result]

        mock_graph_builder = MagicMock()
        mock_graph_builder.get_nodes.return_value = []

        with patch("src.cli.main.GraphBuilder") as MockGraphBuilder:
            MockGraphBuilder.return_value = mock_graph_builder

            with tempfile.TemporaryDirectory() as tmpdir:
                result = self.runner.invoke(cli, ["analyze", tmpdir])

        assert result.exit_code == 0

    @patch("src.cli.main._parse_files")
    @patch("src.cli.main._get_parser")
    def test_visualize_command(self, mock_get_parser, mock_parse_files):
        mock_parser = MagicMock()
        mock_get_parser.return_value = mock_parser

        mock_result = MagicMock()
        mock_result.file_path = Path("/test.py")
        mock_result.entities = []
        mock_result.imports = []
        mock_parse_files.return_value = [mock_result]

        mock_graph_builder = MagicMock()
        mock_graph_builder.get_nodes.return_value = []

        with patch("src.cli.main.GraphBuilder") as MockGraphBuilder:
            MockGraphBuilder.return_value = mock_graph_builder

            with tempfile.TemporaryDirectory() as tmpdir:
                result = self.runner.invoke(visualize, [tmpdir])

        assert result.exit_code == 0

    @patch("src.cli.main._parse_files")
    @patch("src.cli.main._get_parser")
    def test_complexity_command(self, mock_get_parser, mock_parse_files):
        mock_parser = MagicMock()
        mock_get_parser.return_value = mock_parser

        mock_result = MagicMock()
        mock_result.file_path = Path("/test.py")
        mock_result.entities = []
        mock_result.imports = []
        mock_parse_files.return_value = [mock_result]

        with tempfile.TemporaryDirectory() as tmpdir:
            result = self.runner.invoke(complexity, [tmpdir])

        assert result.exit_code == 0

    @patch("src.cli.main._parse_files")
    @patch("src.cli.main._get_parser")
    def test_deps_command(self, mock_get_parser, mock_parse_files):
        mock_parser = MagicMock()
        mock_get_parser.return_value = mock_parser

        mock_result = MagicMock()
        mock_result.file_path = Path("/test.py")
        mock_result.entities = []
        mock_result.imports = []
        mock_parse_files.return_value = [mock_result]

        mock_graph_builder = MagicMock()
        mock_graph_builder.get_nodes.return_value = []
        mock_graph_builder.edges = []

        with patch("src.cli.main.GraphBuilder") as MockGraphBuilder:
            MockGraphBuilder.return_value = mock_graph_builder

            with tempfile.TemporaryDirectory() as tmpdir:
                result = self.runner.invoke(deps, [tmpdir])

        assert result.exit_code == 0

    @patch("src.cli.main._parse_files")
    @patch("src.cli.main._get_parser")
    def test_export_command(self, mock_get_parser, mock_parse_files):
        mock_parser = MagicMock()
        mock_get_parser.return_value = mock_parser

        mock_result = MagicMock()
        mock_result.file_path = Path("/test.py")
        mock_result.entities = []
        mock_result.imports = []
        mock_parse_files.return_value = [mock_result]

        mock_graph_builder = MagicMock()
        mock_graph_builder.get_nodes.return_value = []
        mock_graph_builder.edges = []

        with patch("src.cli.main.GraphBuilder") as MockGraphBuilder:
            MockGraphBuilder.return_value = mock_graph_builder

            with tempfile.NamedTemporaryFile(suffix=".json", delete=False) as f:
                output_path = f.name

            try:
                result = self.runner.invoke(export, ["/test", "-o", output_path])
                assert result.exit_code == 0 or "Error" in result.output
            finally:
                Path(output_path).unlink(missing_ok=True)

    def test_verbose_flag(self):
        result = self.runner.invoke(cli, ["--verbose", "--help"])
        assert result.exit_code == 0


class TestHelperFunctions:
    def test_get_parser_auto_python(self):
        from src.cli.main import _get_parser
        with patch("pathlib.Path.glob") as mock_glob:
            mock_glob.return_value = [Path("/test.py")]
            parser = _get_parser("auto", Path("/test"))
            assert parser is not None

    def test_parse_files_returns_empty_for_no_matches(self):
        from src.cli.main import _parse_files
        mock_parser = MagicMock()
        mock_result = MagicMock()
        mock_result.entities = []
        mock_result.errors = []
        mock_parser.SUPPORTED_EXTENSIONS = [".py"]
        mock_parser.parse.return_value = mock_result

        with patch("pathlib.Path.rglob") as mock_rglob:
            mock_rglob.return_value = []

            results = _parse_files(Path("/test"), mock_parser, False)

        assert results == []

    def test_display_summary(self):
        from src.cli.main import _display_summary

        mock_graph_builder = MagicMock()
        mock_graph_builder.get_nodes.return_value = []

        mock_results = []

        _display_summary(mock_graph_builder, mock_results, False)