package grpcall

import (
	"encoding/base64"

	"github.com/jhump/protoreflect/desc"
)

type FileDescriptorSorter []*desc.FileDescriptor

func (this FileDescriptorSorter) Len() int {
	return len(this)
}

func (this FileDescriptorSorter) Less(i, j int) bool {
	return this[i].GetName() < this[j].GetName()
}

func (this FileDescriptorSorter) Swap(i, j int) {
	this[i], this[j] = this[j], this[i]
}

var base64s = []*base64.Encoding{base64.StdEncoding, base64.URLEncoding, base64.RawStdEncoding, base64.RawURLEncoding}

func metadata_decode(val string) (string, error) {
	var firstErr error
	var b []byte
	// we are lenient and can accept any of the flavors of base64 encoding
	for _, d := range base64s {
		var err error
		b, err = d.DecodeString(val)
		if err != nil {
			if firstErr == nil {
				firstErr = err
			}
			continue
		}
		return string(b), nil
	}
	return "", firstErr
}