"""
#exonware/xwnode/tests/3.advance/test_maintainability.py
Maintainability Excellence Tests - Priority #3
Validates code quality, modularity, and design patterns.
Company: eXonware.com
Author: eXonware Backend Team
Email: connect@exonware.com
Version: 0.0.1
Generation Date: 11-Oct-2025
"""

import pytest
from pathlib import Path
from exonware.xwnode import XWNode
from exonware.xwnode.common.patterns.registry import StrategyRegistry


@pytest.mark.xwnode_advance
@pytest.mark.xwnode_maintainability

class TestMaintainabilityExcellence:
    """Maintainability excellence validation - Priority #3."""

    def test_code_quality_metrics(self):
        """Validate code quality metrics (complexity, duplication)."""
        facade_path = Path(__file__).resolve().parents[2] / "src" / "exonware" / "xwnode" / "facade.py"
        text = facade_path.read_text(encoding="utf-8")
        assert "class XWNode" in text
        assert "def from_native" in text

    def test_separation_of_concerns(self):
        """Validate proper separation of concerns."""
        src_root = Path(__file__).resolve().parents[2] / "src" / "exonware" / "xwnode"
        assert (src_root / "nodes").is_dir()
        assert (src_root / "edges").is_dir()
        assert (src_root / "common").is_dir()

    def test_design_patterns(self):
        """Validate proper design pattern implementation."""
        assert isinstance(StrategyRegistry(), StrategyRegistry)

    def test_refactorability(self):
        """Validate ease of refactoring."""
        data = {"user": {"name": "alice"}}
        node = XWNode.from_native(data)
        assert node.to_native() == data

    def test_modularity(self):
        """Validate modular architecture."""
        src_root = Path(__file__).resolve().parents[2] / "src" / "exonware" / "xwnode"
        py_files = list(src_root.rglob("*.py"))
        assert len(py_files) > 20

    def test_code_organization(self):
        """Validate logical code organization."""
        project_root = Path(__file__).resolve().parents[2]
        assert (project_root / "tests").is_dir()
        assert (project_root / "docs").is_dir()
        assert (project_root / "README.md").is_file()
