/*
 * Copyright (c) New Cloud Technologies, Ltd., 2013-2026
 *
 * You can not use the contents of the file in any way without New Cloud Technologies Ltd. written permission.
 * To obtain such a permit, you should contact New Cloud Technologies, Ltd. at https://myoffice.ru/contacts/
 */

package config

import (
	"reflect"
	"strconv"
	"strings"

	"github.com/go-viper/mapstructure/v2"
)

type CommaSeparatedFloat64Slice []float64

func CommaSeparatedFloat64SliceHookFunc() mapstructure.DecodeHookFuncType {
	return func(
		f reflect.Type,
		t reflect.Type,
		data interface{},
	) (interface{}, error) {
		// Check that the data is string
		if f.Kind() != reflect.String {
			return data, nil
		}

		// Check that the target type is our custom type
		if t != reflect.TypeOf(CommaSeparatedFloat64Slice{}) {
			return data, nil
		}

		stringSlice := strings.Split(data.(string), ",")
		floatSlice := make([]float64, 0)
		for _, str := range stringSlice {
			val, err := strconv.ParseFloat(strings.TrimSpace(str), 64)
			if err != nil {
				return nil, err
			}
			floatSlice = append(floatSlice, val)
		}

		// Return the parsed value
		return CommaSeparatedFloat64Slice(floatSlice), nil
	}
}

// HttpMetrics configuration properties for http monitoring
type HttpMetrics struct {
	HistogramEnabled bool
	Buckets          CommaSeparatedFloat64Slice
}

// Metrics configuration properties for monitoring
type Metrics struct {
	Endpoint         string
	HistogramBuckets CommaSeparatedFloat64Slice
	Http             HttpMetrics
}