#!/usr/bin/env python3
"""
#exonware/xwquery/src/exonware/xwquery/executors/graph/subgraph_executor.py
SUBGRAPH Operation Executor - Extract subgraph
Company: eXonware.com
Author: eXonware Backend Team
Email: connect@exonware.com
Version: 0.9.0.6
Generation Date: 28-Oct-2025
"""

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


class SubgraphExecutor(AUniversalOperationExecutor):
    """
    SUBGRAPH operation executor - Extract subgraph.
    Cypher: MATCH (n:Label) WITH collect(n) as nodes CALL apoc.graph.fromNodes(nodes, 'SUBGRAPH') YIELD graph RETURN graph
    Gremlin: g.V().hasLabel('person').subgraph('sg')
    Extracts a subgraph based on:
    - Node selection (IDs, labels, properties)
    - Edge selection (types, properties)
    - Induced subgraph (nodes + all edges between them)
    Reuses xwnode graph extraction.
    """
    OPERATION_NAME = "SUBGRAPH"

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

    def _execute_subgraph(self, node: Any, params: dict, context: ExecutionContext) -> dict:
        """
        Execute SUBGRAPH - Extract subgraph.
        FUTURE: Will use xwnode graph extraction.
        """
        node_ids = params.get('node_ids', params.get('nodes', []))
        node_condition = params.get('node_condition')
        edge_condition = params.get('edge_condition')
        induced = params.get('induced', True)  # Include all edges between selected nodes
        subgraph_nodes = []
        subgraph_edges = []
        # FUTURE: Use xwnode's graph methods
        # subgraph_nodes = graph.get_nodes(ids=node_ids, condition=node_condition)
        # 
        # if induced:
        #     # Include all edges between selected nodes
        #     subgraph_edges = graph.get_induced_edges(subgraph_nodes, condition=edge_condition)
        # else:
        #     # Include only edges matching condition
        #     subgraph_edges = graph.get_edges(condition=edge_condition)
        return {
            'subgraph_nodes': subgraph_nodes,
            'subgraph_edges': subgraph_edges,
            'node_count': len(subgraph_nodes),
            'edge_count': len(subgraph_edges),
            'induced': induced,
            'status': 'basic_implementation',
            'note': 'Will use xwnode graph extraction for production'
        }
__all__ = ['SubgraphExecutor']
