#!/usr/bin/env python3
"""
#exonware/xwnode/src/exonware/xwnode/queries/executors/data/alter_executor.py
ALTER Executor
Company: eXonware.com
Author: eXonware Backend Team
Email: connect@exonware.com
Version: 0.0.1.8
Generation Date: 09-Oct-2025
"""

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


class AlterExecutor(AUniversalOperationExecutor):
    """
    ALTER operation executor.
    Alters structure/schema
    Capability: Universal
    Operation Type: DATA_OPS
    """
    OPERATION_NAME = "ALTER"
    OPERATION_TYPE = OperationType.DATA_OPS
    SUPPORTED_NODE_TYPES = []  # Universal

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

    def _execute_alter(self, node: Any, params: dict, context: ExecutionContext) -> dict:
        """Execute ALTER - schema/structure modifications."""
        operation = params.get('operation', 'modify')  # add_field, remove_field, rename_field
        target = params.get('target')
        # FUTURE: Integrate with xwschema for schema operations
        return {'operation': operation, 'target': target,
                'status': 'basic_implementation',
                'note': 'Will use xwschema for schema management'}
