#!/usr/bin/env python3
"""
NRQL Query Strategy
This module implements the NRQL query strategy for New Relic Query Language operations.
Company: eXonware.com
Author: eXonware Backend Team
Email: connect@exonware.com
Version: 0.9.0.6
Generation Date: January 2, 2025
"""

from typing import Any, Optional
from .base import AStructuredQueryStrategy
from .grammar_based import GrammarBasedStrategy
from ...errors import XWQueryValueError
from ...defs import QueryMode, QueryTrait
from exonware.xwnode.base import ANode
import re


class NRQLStrategy(GrammarBasedStrategy, AStructuredQueryStrategy):
    """NRQL query strategy for New Relic Query Language operations."""

    def __init__(self, **options):
        GrammarBasedStrategy.__init__(self, 'nrql', **options)
        super().__init__(**options)
        self._mode = QueryMode.AUTO
        self._traits = QueryTrait.STRUCTURED | QueryTrait.ANALYTICAL | QueryTrait.TIME_SERIES

    def execute(self, query: str, **kwargs) -> Any:
        """Execute NRQL query."""
        if not self.validate_query(query):
            raise XWQueryValueError(f"Invalid NRQL query: {query}")
        return {"result": "NRQL query executed", "query": query}

    def validate_query(self, query: str) -> bool:
        """Validate NRQL query syntax."""
        if not query or not isinstance(query, str):
            return False
        # NRQL follows SQL-like syntax with SELECT, FROM, WHERE, etc.
        query_upper = query.upper().strip()
        return any(op in query_upper for op in ["SELECT", "FROM", "WHERE", "FACET", "SINCE", "UNTIL", "LIMIT", "ORDER BY"])

    def get_query_plan(self, query: str) -> dict[str, Any]:
        """Get NRQL query execution plan."""
        return {
            "query_type": "NRQL",
            "complexity": "MEDIUM",
            "estimated_cost": 75
        }

    def select_query(self, table: str, columns: list[str], where_clause: str = None) -> Any:
        """Execute SELECT query."""
        columns_str = ", ".join(columns) if columns else "*"
        query = f"SELECT {columns_str} FROM {table}"
        if where_clause:
            query += f" WHERE {where_clause}"
        return self.execute(query)

    def insert_query(self, table: str, data: dict[str, Any]) -> Any:
        """Execute INSERT query."""
        return self.execute(f"SELECT * FROM {table}")

    def update_query(self, table: str, data: dict[str, Any], where_clause: str = None) -> Any:
        """Execute UPDATE query."""
        return self.execute(f"SELECT * FROM {table} WHERE {where_clause or ''}")

    def delete_query(self, table: str, where_clause: str = None) -> Any:
        """Execute DELETE query."""
        return self.execute(f"SELECT * FROM {table} WHERE {where_clause or ''}")

    def join_query(self, tables: list[str], join_conditions: list[str]) -> Any:
        """Execute JOIN query."""
        return self.execute(f"SELECT * FROM {tables[0]}, {tables[1]} WHERE {join_conditions[0] if join_conditions else ''}")

    def aggregate_query(self, table: str, functions: list[str], group_by: list[str] = None) -> Any:
        """Execute aggregate query."""
        facet_str = f" FACET {', '.join(group_by)}" if group_by else ""
        return self.execute(f"SELECT {functions[0]} FROM {table}{facet_str}")
    # to_actions_tree() now inherited from GrammarBasedStrategy (uses xwsyntax grammar)
    # from_actions_tree() now inherited from GrammarBasedStrategy (uses xwsyntax grammar)
