#!/usr/bin/env python3
"""
#exonware/xwquery/src/exonware/xwquery/executors/graph/variable_path_executor.py
VARIABLE_PATH Operation Executor - Variable length path patterns
Company: eXonware.com
Author: eXonware Backend Team
Email: connect@exonware.com
Version: 0.0.1.8
Generation Date: 28-Oct-2025
"""

from typing import Any
from ..base import AUniversalOperationExecutor
from ....contracts import QueryAction, ExecutionContext, ExecutionResult


class VariablePathExecutor(AUniversalOperationExecutor):
    """
    VARIABLE_PATH operation executor - Variable length path patterns.
    Cypher: MATCH (a)-[*2..5]->(b)  # Paths of length 2 to 5
    Gremlin: g.V().repeat(out()).times(2,5)
    Similar to EXPAND but focuses on path patterns rather than reachable nodes.
    Reuses xwnode path enumeration with length constraints.
    """
    OPERATION_NAME = "VARIABLE_PATH"

    def _do_execute(self, action: QueryAction, context: ExecutionContext) -> ExecutionResult:
        """Execute VARIABLE_PATH operation."""
        params = action.params
        node = context.node
        result_data = self._execute_variable_path(node, params, context)
        return ExecutionResult(
            success=True,
            data=result_data,
            action_type=self.OPERATION_NAME,
            metadata={'operation': self.OPERATION_NAME}
        )

    def _execute_variable_path(self, node: Any, params: dict, context: ExecutionContext) -> dict:
        """
        Execute VARIABLE_PATH - Variable length path patterns.
        FUTURE: Will use xwnode path enumeration with length constraints.
        """
        min_length = params.get('min_length', 1)
        max_length = params.get('max_length', 5)
        direction = params.get('direction', 'out')  # in, out, both
        edge_type = params.get('edge_type')
        source = params.get('source')
        target = params.get('target')
        paths = []
        # FUTURE: Use xwnode's path enumeration
        # if source and target:
        #     paths = graph.find_paths(source, target, min_length=min_length, max_length=max_length, edge_type=edge_type)
        # else:
        #     paths = graph.enumerate_paths(node, min_length=min_length, max_length=max_length, direction=direction, edge_type=edge_type)
        return {
            'paths': paths,
            'min_length': min_length,
            'max_length': max_length,
            'direction': direction,
            'edge_type': edge_type,
            'path_count': len(paths),
            'status': 'basic_implementation',
            'note': 'Will use xwnode path enumeration with length constraints'
        }
__all__ = ['VariablePathExecutor']
