from fastapi import APIRouter, HTTPException

from common.log.module_logger import ModuleLogger
from backend.services.starrocks_metrics_service import StarRocksMetricsService

router = APIRouter()

# Initialize service and logger
starrocks_service = StarRocksMetricsService()
module_logger = ModuleLogger(__file__)


@router.get("/starrocks/product/{product_id}/available-metrics")
async def get_available_metrics(product_id: str):
	"""
	Get list of available StarRocks-backed metrics for a specific product.
	
	Args:
		product_id: Product ID to get metrics for (required).
	
	Returns a list of metric names available via StarRocks for the specified product.
	"""
	await module_logger.log_info(
		f"Getting StarRocks available metrics list for product_id: {product_id}"
	)

	metrics = starrocks_service.get_available_metrics(product_id)
	
	if not metrics:
		available_products = ", ".join(starrocks_service.get_available_products())
		raise HTTPException(
			status_code=404, 
			detail=f"Unknown product_id: {product_id}. Available products: {available_products}"
		)

	return {
		"product_id": product_id,
		"available_metrics": metrics,
		"total_count": len(metrics),
		"description": f"List of StarRocks-backed metrics for product '{product_id}'",
	}