package rpcconfig

import (
	"strconv"

	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config"
)

const (
	subsection       = "rpc"
	limitsSubsection = "limits"
)

type LimitConfig struct {
	Methods []string
	MaxOps  int64
}

// Limits returns the "limits" config from "rpc" section.
func Limits(c *config.Config) []LimitConfig {
	c = c.Sub(subsection).Sub(limitsSubsection)

	var limits []LimitConfig

	for i := uint64(0); ; i++ {
		si := strconv.FormatUint(i, 10)
		sc := c.Sub(si)

		methods := config.StringSliceSafe(sc, "methods")
		if len(methods) == 0 {
			break
		}

		if sc.Value("max_ops") == nil {
			panic("no max operations for method group")
		}

		limits = append(limits, LimitConfig{methods, config.IntSafe(sc, "max_ops")})
	}

	return limits
}