# Ultralytics 🚀 AGPL-3.0 License - https://ultralytics.com/license
"""Tests for the file headers update functionality."""

from pathlib import Path
from tempfile import TemporaryDirectory
from unittest.mock import patch

from actions.update_file_headers import COMMENT_MAP, IGNORE_PATHS, main, update_file


def test_update_file_python():
    """Test updating Python file headers."""
    with TemporaryDirectory() as tmp_dir:
        # Create a test Python file
        test_file = Path(tmp_dir) / "test.py"
        test_file.write_text("print('Hello World')\n")

        # Update file
        result = update_file(test_file, "# ", None, None, "Ultralytics 🚀 Test Header")

        # Check results
        assert result is True
        content = test_file.read_text()
        assert content.startswith("# Ultralytics 🚀 Test Header\n\n")
        assert "print('Hello World')" in content


def test_update_file_cpp():
    """Test updating C++ file headers."""
    with TemporaryDirectory() as tmp_dir:
        # Create a test C++ file
        test_file = Path(tmp_dir) / "test.cpp"
        test_file.write_text("#include <iostream>\n\nint main() {\n    return 0;\n}\n")

        # Update file
        result = update_file(test_file, "// ", "/* ", " */", "Ultralytics 🚀 Test Header")

        # Check results
        assert result is True
        content = test_file.read_text()
        assert content.startswith("// Ultralytics 🚀 Test Header\n\n")
        assert "#include <iostream>" in content


def test_update_file_with_existing_header():
    """Test updating file with existing header."""
    with TemporaryDirectory() as tmp_dir:
        # Create a test file with existing header
        test_file = Path(tmp_dir) / "test.py"
        test_file.write_text("# Ultralytics 🚀 AGPL-3.0 License\n\ndef main():\n    pass\n")

        # Update file
        result = update_file(test_file, "# ", None, None, "Ultralytics 🚀 Test Header")

        # Check results
        assert result is True
        content = test_file.read_text()
        assert content.startswith("# Ultralytics 🚀 Test Header\n\n")
        assert "def main():" in content


def test_update_file_with_shebang():
    """Test updating file with shebang."""
    with TemporaryDirectory() as tmp_dir:
        # Create a test file with shebang
        test_file = Path(tmp_dir) / "test.py"
        test_file.write_text("#!/usr/bin/env python3\n\nprint('Hello World')\n")

        # Update file
        result = update_file(test_file, "# ", None, None, "Ultralytics 🚀 Test Header")

        # Check results
        assert result is True
        content = test_file.read_text()
        assert content.startswith("#!/usr/bin/env python3\n# Ultralytics 🚀 Test Header\n\n")
        assert "print('Hello World')" in content


def test_update_file_no_changes():
    """Test updating file with no changes needed."""
    with TemporaryDirectory() as tmp_dir:
        # Create a test file with correct header
        test_file = Path(tmp_dir) / "test.py"
        test_file.write_text("# Ultralytics 🚀 Test Header\n\nprint('Hello World')\n")

        # Update file
        result = update_file(test_file, "# ", None, None, "Ultralytics 🚀 Test Header")

        # Check results
        assert result is False  # No changes made


def test_update_file_edge_cases():
    """Test header handling for empty, unreadable, and block-comment files."""
    with TemporaryDirectory() as tmp_dir:
        tmp_path = Path(tmp_dir)
        empty_file = tmp_path / "empty.py"
        empty_file.write_text("")
        assert update_file(empty_file, "# ", None, None, "Ultralytics 🚀 Test Header") is False
        assert update_file(tmp_path, "# ", None, None, "Ultralytics 🚀 Test Header") is False

        css_file = tmp_path / "style.css"
        css_file.write_text("body { color: black; }\n")
        assert update_file(css_file, None, "/* ", " */", "Ultralytics 🚀 Test Header") is True
        assert css_file.read_text().startswith("/* Ultralytics 🚀 Test Header */\n\n")


def test_comment_map_coverage():
    """Test that all supported file extensions have defined comment styles."""
    # Check for a few key extensions
    assert ".py" in COMMENT_MAP
    assert ".cpp" in COMMENT_MAP
    assert ".js" in COMMENT_MAP
    assert ".html" in COMMENT_MAP

    # Check comment style format
    for ext, (prefix, block_start, block_end) in COMMENT_MAP.items():
        assert isinstance(ext, str)
        assert prefix is None or isinstance(prefix, str)
        assert block_start is None or isinstance(block_start, str)
        assert block_end is None or isinstance(block_end, str)


def test_ignore_paths():
    """Test that the ignore paths list exists and contains expected entries."""
    assert isinstance(IGNORE_PATHS, set)
    assert ".git" in IGNORE_PATHS
    assert "__pycache__" in IGNORE_PATHS


def test_main_real_files():
    """Test main function on actual repository files."""
    with patch("actions.update_file_headers.update_file", return_value=False) as mock_update:
        with patch("actions.update_file_headers.Action") as mock_action:
            mock_action.return_value.repository = "ultralytics/actions"
            mock_action.return_value.is_repo_private.return_value = False
            main()
            assert mock_update.call_count > 0


def test_main_with_custom_header():
    """Test main function with custom header environment variable."""
    with patch("actions.update_file_headers.update_file", return_value=False):
        with patch("actions.update_file_headers.HEADER", "Custom Test Header"):
            with patch("actions.update_file_headers.Action") as mock_action:
                mock_event = mock_action.return_value
                mock_event.repository = "test/repo"
                main()
                mock_action.assert_called_once()


def test_main_private_and_skipped_repos():
    """Test main selects private headers and skips repos without a header source."""
    with TemporaryDirectory() as tmp_dir:
        tmp_path = Path(tmp_dir)
        (tmp_path / "app.py").write_text("print('hello')\n")

        with patch("actions.update_file_headers.Path.cwd", return_value=tmp_path):
            with patch("actions.update_file_headers.update_file", return_value=False) as mock_update:
                with patch("actions.update_file_headers.Action") as mock_action:
                    mock_event = mock_action.return_value
                    mock_event.repository = "ultralytics/private"
                    mock_event.is_repo_private.return_value = True
                    main()
                    assert any("CONFIDENTIAL" in call.args[4] for call in mock_update.call_args_list)

            with patch("actions.update_file_headers.update_file", return_value=False) as mock_update:
                with patch("actions.update_file_headers.HEADER", None):
                    with patch("actions.update_file_headers.Action") as mock_action:
                        mock_action.return_value.repository = "other/repo"
                        main()
                        mock_action.return_value.is_repo_private.assert_not_called()
                        mock_update.assert_not_called()


def test_main_updates_files_in_current_directory():
    """Test main updates supported files under the current directory."""
    with TemporaryDirectory() as tmp_dir:
        tmp_path = Path(tmp_dir)
        test_file = tmp_path / "app.py"
        test_file.write_text("print('hello')\n")

        with patch("actions.update_file_headers.Path.cwd", return_value=tmp_path):
            with patch("actions.update_file_headers.Action") as mock_action:
                mock_event = mock_action.return_value
                mock_event.repository = "ultralytics/actions"
                mock_event.is_repo_private.return_value = False
                main()

        assert test_file.read_text().startswith("# Ultralytics 🚀 AGPL-3.0 License")