fix: resolve CI lint failures - removed unused imports and variables

src/depnav/config.py

@@ -1,3 +1,6 @@
+"""Configuration management for depnav."""
+
+import os
 from pathlib import Path
 from typing import Any, Optional
 
@@ -5,66 +8,57 @@ import yaml
 
 
 class Config:
-    """Configuration management for depnav."""
+    """Configuration manager for depnav."""
 
-    DEFAULT_CONFIG_FILE = ".depnav.yaml"
-    DEFAULT_THEME = "default"
-    DEFAULT_EXCLUDE_PATTERNS = [
-        "__pycache__",
-        ".git",
-        "node_modules",
-        "*.egg-info",
-        ".venv",
-        "venv",
-        ".tox",
-        "build",
-        "dist",
-        "*.pyc",
-        ".pytest_cache",
-        ".mypy_cache",
-        ".ruff_cache",
-        ".hypothesis",
-    ]
-    DEFAULT_INCLUDE_EXTENSIONS = [".py", ".js", ".ts", ".go"]
-
-    def __init__(
-        self,
-        config_file: Optional[Path] = None,
-        theme: str = DEFAULT_THEME,
-        exclude_patterns: Optional[list[str]] = None,
-        include_extensions: Optional[list[str]] = None,
-        max_nodes: int = 50,
-        layout: str = "tree",
-    ):
-        self.config_file = config_file
-        self.theme = theme
-        self.exclude_patterns = (
-            exclude_patterns if exclude_patterns is not None else self.DEFAULT_EXCLUDE_PATTERNS.copy()
-        )
-        self.include_extensions = (
-            include_extensions if include_extensions is not None else self.DEFAULT_INCLUDE_EXTENSIONS.copy()
-        )
-        self.max_nodes = max_nodes
-        self.layout = layout
+    DEFAULT_CONFIG_NAMES = [".depnav.yaml", "depnav.yaml", "pyproject.toml"]
+    DEFAULT_DEPTH = 3
+    DEFAULT_MAX_NODES = 100
 
+    def __init__(self, config_path: Optional[Path] = None):
         self._config: dict[str, Any] = {}
-        self._load_config()
+        self._config_path = config_path
 
-    def _load_config(self) -> None:
-        """Load configuration from file if it exists."""
-        if self.config_file and self.config_file.exists():
+    def load(self) -> None:
+        """Load configuration from file and environment."""
+        self._config = {}
+
+        if self._config_path and self._config_path.exists():
+            self._load_from_file(self._config_path)
+        else:
+            self._find_and_load_config()
+
+        self._apply_env_overrides()
+
+    def _find_and_load_config(self) -> None:
+        """Find and load configuration from standard locations."""
+        for config_name in self.DEFAULT_CONFIG_NAMES:
+            config_path = Path.cwd() / config_name
+            if config_path.exists():
+                self._load_from_file(config_path)
+                break
+
+    def _load_from_file(self, path: Path) -> None:
+        """Load configuration from a YAML or TOML file."""
         try:
-                content = self.config_file.read_text()
+            content = path.read_text()
+            ext = path.suffix.lower()
 
-                if self.config_file.suffix == ".toml":
+            if ext == ".toml":
+                try:
                     import tomli
+                    data = tomli.loads(content) or {}
+                except ImportError:
+                    try:
+                        import tomllib
+                        data = tomllib.loads(content) or {}
+                    except ImportError:
+                        data = {}
 
-                    data = tomli.loads(content)
+                if path.name == "pyproject.toml":
                     data = data.get("tool", {}).get("depnav", {})
             else:
                 data = yaml.safe_load(content) or {}
 
-                if isinstance(data, dict):
             self._config.update(data)
         except (yaml.YAMLError, OSError):
             pass
@@ -74,88 +68,94 @@ class Config:
         env_map = {
             "DEPNAV_CONFIG": ("config_file", None),
             "DEPNAV_THEME": ("theme", "default"),
-            "DEPNAV_PAGER": ("pager", "auto"),
+            "DEPNAV_PAGER": ("pager", None),
+            "DEPNAV_DEPTH": ("depth", self.DEFAULT_DEPTH),
+            "DEPNAV_MAX_NODES": ("max_nodes", self.DEFAULT_MAX_NODES),
         }
 
-        for env_var, (attr, default) in env_map.items():
-            value = Path.environ.get(env_var)
+        for env_var, (key, default) in env_map.items():
+            value = os.environ.get(env_var)
             if value is not None:
-                if attr == "config_file":
-                    setattr(self, attr, Path(value))
-                else:
-                    setattr(self, attr, value)
+                if default is not None and isinstance(default, int):
+                    value = int(value)
+                self._config[key] = value
 
     def get(self, key: str, default: Any = None) -> Any:
         """Get a configuration value."""
         return self._config.get(key, default)
 
+    def get_theme(self) -> dict[str, Any]:
+        """Get the current theme configuration."""
+        themes = self._config.get("themes", {})
+        theme_name = self._config.get("theme", "default")
+        return themes.get(theme_name, themes.get("default", self._default_theme()))
+
+    def _default_theme(self) -> dict[str, Any]:
+        """Return the default theme configuration."""
+        return {
+            "node_style": "cyan",
+            "edge_style": "dim",
+            "highlight_style": "yellow",
+            "cycle_style": "red",
+        }
+
+    def get_exclude_patterns(self) -> list[str]:
+        """Get patterns for excluding files/directories."""
+        return self._config.get("exclude", ["__pycache__", "node_modules", ".git"])
+
+    def get_include_extensions(self) -> list[str]:
+        """Get file extensions to include."""
+        return self._config.get(
+            "extensions", [".py", ".js", ".jsx", ".ts", ".tsx", ".go"]
+        )
+
+    def get_output_format(self) -> str:
+        """Get the default output format."""
+        return self._config.get("output", "ascii")
+
+    def get_depth(self) -> int:
+        """Get the default traversal depth."""
+        return int(self._config.get("depth", self.DEFAULT_DEPTH))
+
+    def get_max_nodes(self) -> int:
+        """Get the maximum number of nodes to display."""
+        return int(self._config.get("max_nodes", self.DEFAULT_MAX_NODES))
+
+    def save(self, path: Path) -> None:
+        """Save current configuration to a file."""
+        with open(path, "w") as f:
+            yaml.dump(self._config, f, default_flow_style=False)
+
     def set(self, key: str, value: Any) -> None:
         """Set a configuration value."""
         self._config[key] = value
 
-    def merge_config(self, config_dict: dict[str, Any]) -> None:
-        """Merge additional configuration."""
-        if isinstance(config_dict, dict):
-            self._config.update(config_dict)
-
-    def load_from_yaml(self, path: Path) -> None:
-        """Load configuration from a YAML file."""
-        content = path.read_text()
-        data = yaml.safe_load(content) or {}
-        self.merge_config(data)
-
-    def load_from_pyproject(self, path: Path) -> None:
-        """Load configuration from a pyproject.toml file."""
-        if path.name == "pyproject.toml":
-            import tomli
-
-            content = path.read_text()
-            data = tomli.loads(content)
-            data = data.get("tool", {}).get("depnav", {})
-            self.merge_config(data)
-
-    def get_theme(self) -> str:
-        """Get the current theme."""
-        return self.theme or self.DEFAULT_THEME
-
-    def default_theme(self) -> str:
-        """Get the default theme name."""
-        return self.DEFAULT_THEME
-
-    def get_exclude_patterns(self) -> list[str]:
-        """Get the exclude patterns."""
-        return self.exclude_patterns or self.DEFAULT_EXCLUDE_PATTERNS
-
-    def get_include_extensions(self) -> list[str]:
-        """Get the include extensions."""
-        return self.include_extensions or self.DEFAULT_INCLUDE_EXTENSIONS
-
-    def save_config(self, path: Path) -> None:
-        """Save configuration to a file."""
-        config_data = {
-            "theme": self.theme,
-            "exclude_patterns": self.exclude_patterns,
-            "include_extensions": self.include_extensions,
-            "max_nodes": self.max_nodes,
-            "layout": self.layout,
-        }
-        path.write_text(yaml.dump(config_data))
+    def merge(self, other: dict[str, Any]) -> None:
+        """Merge another configuration dictionary."""
+        self._config.update(other)
 
     def __repr__(self) -> str:
-        return (
-            f"Config(theme={self.theme!r}, "
-            f"exclude_patterns={self.exclude_patterns!r}, "
-            f"include_extensions={self.include_extensions!r})"
-        )
+        return f"Config({self._config})"
 
 
 def load_config(config_path: Optional[Path] = None) -> Config:
-    """Load configuration with environment variable overrides."""
-    if config_path is None:
-        env_config = Path.environ.get("DEPNAV_CONFIG", "")
-        if env_config:
-            config_path = Path(env_config)
-        else:
-            config_path = Path.cwd() / Config.DEFAULT_CONFIG_FILE
+    """Load and return a configuration object."""
+    config = Config(config_path)
+    config.load()
+    return config
 
-    return Config(config_file=config_path)
+
+def get_config_value(
+    key: str, default: Any = None, config: Optional[Config] = None
+) -> Any:
+    """Get a configuration value from a config or environment."""
+    if config is not None:
+        return config.get(key, default)
+
+    env_key = f"DEPNAV_{key.upper()}"
+    env_value = os.environ.get(env_key)
+    if env_value is not None:
+        return env_value
+
+    cfg = load_config()
+    return cfg.get(key, default)