//! # Configuration Management
//!
//! This module provides configuration management for the LogXide logging system.
//! It supports multiple configuration sources including YAML, JSON, and Python
//! dictConfig for compatibility with existing Python logging configurations.
//!
//! ## Planned Features
//!
//! - **YAML Configuration**: Load logging configuration from YAML files
//! - **JSON Configuration**: Load logging configuration from JSON files
//! - **dictConfig Support**: Full compatibility with Python logging.config.dictConfig
//! - **Programmatic Configuration**: Runtime configuration of loggers, handlers, and formatters
//!
//! ## Current Status
//!
//! This module is currently a placeholder for future configuration functionality.
//! The basic structure is in place but implementation is pending.
//!
//! ## Future Structure
//!
//! The configuration system will support:
//! - Logger configuration (levels, handlers, propagation)
//! - Handler configuration (types, formatters, filters)
//! - Formatter configuration (format strings, date formats)
//! - Filter configuration (custom filter rules)

/// Configuration structure for the LogXide logging framework.
///
/// This struct will eventually support comprehensive configuration of the
/// logging system from various sources including YAML files, JSON files,
/// and Python dictConfig objects.
///
/// # Design Goals
///
/// - **Compatibility**: Full support for Python logging configuration formats
/// - **Flexibility**: Support multiple configuration sources and formats
/// - **Validation**: Comprehensive validation of configuration settings
/// - **Hot Reload**: Runtime reconfiguration without restart (planned)
///
/// # Current Status
///
/// This is currently a placeholder implementation. The structure is defined
/// but most functionality is not yet implemented.
#[derive(Debug, Clone)]
#[allow(dead_code)]
pub struct Config {
    // Placeholder for logger configurations (name, level, handlers, etc.)
    // pub loggers: HashMap<String, LoggerConfig>,

    // Placeholder for handler configurations
    // pub handlers: HashMap<String, HandlerConfig>,

    // Placeholder for formatter configurations
    // pub formatters: HashMap<String, FormatterConfig>,

    // Placeholder for filter configurations
    // pub filters: HashMap<String, FilterConfig>,

    // Add more fields as needed for configuration
}

impl Config {
    /// Create a new, empty configuration.
    ///
    /// Returns a default configuration with no loggers, handlers, formatters,
    /// or filters configured. This can be used as a starting point for
    /// programmatic configuration.
    ///
    /// # Returns
    ///
    /// A new, empty Config instance
    #[allow(dead_code)]
    pub fn new() -> Self {
        Config {
            // Initialize fields as needed
        }
    }

    /// Load configuration from a YAML string.
    ///
    /// Parses a YAML configuration string and creates a Config instance.
    /// The YAML format will follow Python logging configuration conventions
    /// for maximum compatibility.
    ///
    /// # Arguments
    ///
    /// * `_yaml` - YAML configuration string
    ///
    /// # Returns
    ///
    /// Result containing the parsed Config or an error message
    ///
    /// # Note
    ///
    /// This method is not yet implemented and will return an error.
    #[allow(dead_code)]
    pub fn from_yaml(_yaml: &str) -> Result<Self, String> {
        // TODO: Parse YAML and populate Config
        Err("YAML parsing not yet implemented".to_string())
    }

    /// Load configuration from a JSON string.
    ///
    /// Parses a JSON configuration string and creates a Config instance.
    /// The JSON format will follow Python logging configuration conventions
    /// for maximum compatibility.
    ///
    /// # Arguments
    ///
    /// * `_json` - JSON configuration string
    ///
    /// # Returns
    ///
    /// Result containing the parsed Config or an error message
    ///
    /// # Note
    ///
    /// This method is not yet implemented and will return an error.
    #[allow(dead_code)]
    pub fn from_json(_json: &str) -> Result<Self, String> {
        // TODO: Parse JSON and populate Config
        Err("JSON parsing not yet implemented".to_string())
    }

    /// Load configuration from a Python dictionary (dictConfig compatibility).
    ///
    /// Parses a Python dictionary configuration object and creates a Config instance.
    /// This method provides full compatibility with Python's logging.config.dictConfig
    /// functionality, allowing existing Python logging configurations to work
    /// seamlessly with LogXide.
    ///
    /// # Arguments
    ///
    /// * `_dict` - Python dictionary containing logging configuration
    ///
    /// # Returns
    ///
    /// Result containing the parsed Config or an error message
    ///
    /// # Note
    ///
    /// This method is not yet implemented and will return an error.
    ///
    /// # Planned Compatibility
    ///
    /// Will support all standard dictConfig keys:
    /// - `version` - Configuration format version
    /// - `loggers` - Logger configurations
    /// - `handlers` - Handler configurations
    /// - `formatters` - Formatter configurations
    /// - `filters` - Filter configurations
    /// - `root` - Root logger configuration
    #[allow(dead_code)]
    pub fn from_dict(_dict: &pyo3::types::PyDict) -> Result<Self, String> {
        // TODO: Parse Python dict and populate Config
        Err("dictConfig parsing not yet implemented".to_string())
    }
}
