// Package util provide some utility fun
package util

import (
	"sort"

	"github.com/redis/go-redis/v9"
)

// MapSlice define func to build a new slice by applying f to every element of s.
func MapSlice[T, U any](s []T, f func(T) U) []U {
	result := make([]U, 0, len(s))
	for _, item := range s {
		result = append(result, f(item))
	}
	return result
}

// ConvertZSetMembersToFloat64 define func to conver zset member type to float64
func ConvertZSetMembersToFloat64(members []redis.Z) []float64 {
	// recovery time sorted in ascending order
	sortRedisZByTimeMemberAscending(members)
	return MapSlice(members, func(member redis.Z) float64 {
		return member.Score
	})
}

func sortRedisZByTimeMemberAscending(data []redis.Z) {
	sort.Slice(data, func(i, j int) bool {
		memberI := data[i].Member.(string)
		memberJ := data[j].Member.(string)
		return memberI < memberJ
	})
}