"""
Method Registry Module for Conflicts

This module provides a method registry system for registering custom conflict methods,
enabling extensibility and community contributions to the conflict detection and
resolution toolkit.

Supported Registration Types:
    - Method Registry: Register custom conflict methods for:
        * "detection": Conflict detection methods
        * "resolution": Conflict resolution methods
        * "analysis": Conflict analysis methods
        * "tracking": Source tracking methods
        * "investigation": Investigation guide generation methods

Algorithms Used:
    - Registry Pattern: Dictionary-based registration and lookup
    - Dynamic Registration: Runtime function registration
    - Type Checking: Type validation for registered components
    - Lookup Algorithms: Hash-based O(1) lookup for methods
    - Task-based Organization: Hierarchical organization by task type

Key Features:
    - Method registry for custom conflict methods
    - Task-based method organization (detection, resolution, analysis, tracking, investigation)
    - Dynamic registration and unregistration
    - Easy discovery of available methods
    - Support for community-contributed extensions

Main Classes:
    - MethodRegistry: Registry for custom conflict methods

Global Instances:
    - method_registry: Global method registry instance

Example Usage:
    >>> from semantica.conflicts.registry import method_registry
    >>> method_registry.register("resolution", "custom_method", custom_resolution_function)
    >>> available = method_registry.list_all("resolution")

Author: Semantica Contributors
License: MIT
"""

from typing import Dict, Callable, Any, List, Optional


class MethodRegistry:
    """Registry for custom conflict methods."""
    
    _methods: Dict[str, Dict[str, Callable]] = {
        "detection": {},
        "resolution": {},
        "analysis": {},
        "tracking": {},
        "investigation": {},
    }
    
    @classmethod
    def register(cls, task: str, name: str, method_func: Callable):
        """
        Register a custom conflict method.
        
        Args:
            task: Task type ("detection", "resolution", "analysis", "tracking", "investigation")
            name: Method name
            method_func: Method function
        """
        if task not in cls._methods:
            cls._methods[task] = {}
        cls._methods[task][name] = method_func
    
    @classmethod
    def get(cls, task: str, name: str) -> Optional[Callable]:
        """
        Get method by task and name.
        
        Args:
            task: Task type ("detection", "resolution", "analysis", "tracking", "investigation")
            name: Method name
            
        Returns:
            Method function or None
        """
        return cls._methods.get(task, {}).get(name)
    
    @classmethod
    def list_all(cls, task: Optional[str] = None) -> Dict[str, List[str]]:
        """
        List all registered methods.
        
        Args:
            task: Optional task type to filter by
            
        Returns:
            Dictionary mapping task types to method names
        """
        if task:
            return {task: list(cls._methods.get(task, {}).keys())}
        return {t: list(m.keys()) for t, m in cls._methods.items()}
    
    @classmethod
    def unregister(cls, task: str, name: str):
        """
        Unregister a method.
        
        Args:
            task: Task type ("detection", "resolution", "analysis", "tracking", "investigation")
            name: Method name
        """
        if task in cls._methods and name in cls._methods[task]:
            del cls._methods[task][name]
    
    @classmethod
    def clear(cls, task: Optional[str] = None):
        """
        Clear all registered methods for a task or all tasks.
        
        Args:
            task: Optional task type to clear (clears all if None)
        """
        if task:
            if task in cls._methods:
                cls._methods[task].clear()
        else:
            for task_dict in cls._methods.values():
                task_dict.clear()


# Global registry
method_registry = MethodRegistry()

