#!/usr/bin/env python3
"""
#exonware/xwnode/src/exonware/xwnode/queries/executors/filtering/filter_executor.py

FILTER Executor

Company: eXonware.com
Author: Eng. Muhammad AlShehri
Email: connect@exonware.com
Version: 0.0.1.19
Generation Date: 08-Oct-2025
"""

from typing import Any, Dict, List, Callable
from ..base import AUniversalOperationExecutor
from ..contracts import Action, ExecutionContext, ExecutionResult
from ..defs import OperationType


class FilterExecutor(AUniversalOperationExecutor):
    """
    FILTER operation executor - Universal operation.
    
    Filters data based on specified conditions.
    General-purpose filtering that works on all node types.
    
    Capability: Universal
    Operation Type: FILTERING
    """
    
    OPERATION_NAME = "FILTER"
    OPERATION_TYPE = OperationType.FILTERING
    SUPPORTED_NODE_TYPES = []  # Universal
    
    def _do_execute(self, action: Action, context: ExecutionContext) -> ExecutionResult:
        """Execute FILTER operation."""
        params = action.params
        condition = params.get('condition', None)
        path = params.get('path', None)
        
        node = context.node
        result_data = self._execute_filter(node, condition, path, context)
        
        return ExecutionResult(
            success=True,
            data=result_data,
            operation=self.OPERATION_NAME,
            metadata={'filtered_count': len(result_data.get('items', []))}
        )
    
    def _execute_filter(self, node: Any, condition: Any, path: str, context: ExecutionContext) -> Dict:
        """Execute filter logic."""
        filtered_items = []
        
        # Get data to filter
        if path:
            data = node.get(path, default=[])
        else:
            data = node.to_native()
        
        # Apply filter (simplified)
        if isinstance(data, list):
            for item in data:
                if self._matches_filter(item, condition):
                    filtered_items.append(item)
        elif isinstance(data, dict):
            for key, value in data.items():
                if self._matches_filter(value, condition):
                    filtered_items.append({key: value})
        
        return {'items': filtered_items, 'count': len(filtered_items)}
    
    def _matches_filter(self, item: Any, condition: Any) -> bool:
        """Check if item matches filter condition."""
        if condition is None:
            return True
        # Simplified condition matching
        return True

