package client

import "errors"

// ServerList manages lists that are used in Identity
//   - Message servers list
//   - ArchiveServers lists
//   - Owned servers lists
//   - Matriochka paths
type ServerList struct {
	Name    string   `json:"name,omitempty"`
	Servers []Server `json:"servers,omitempty"`
}

// FilterByIdxs returns a filtered server list filtered according to an index list
func (sl *ServerList) FilterByIdxs(MessageServerIdxs []int) (filtered *ServerList, err error) {
	filtered.Servers = []Server{}
	for _, i := range MessageServerIdxs {
		if i > len(sl.Servers)-1 {
			return nil, errors.New("requested server out of range of defined message servers")
		}
	}
	for _, i := range MessageServerIdxs {
		filtered.Servers = append(filtered.Servers, sl.Servers[i])
	}
	return filtered, nil
}

// GetServerByIdx returns a server from it's index
func (sl *ServerList) GetServerByIdx(idx int) (server *Server, err error) {
	if idx > len(sl.Servers)-1 {
		return nil, errors.New("requested server out of range of defined message servers")
	}
	return &sl.Servers[idx], nil
}

// GetServerByPubkey returns a server from it's public key
func (sl *ServerList) GetServerByPubkey(pubkey string) (filtered *Server) {
	for _, srv := range sl.Servers {
		if srv.PublicKey == pubkey {
			return &srv
		}
	}
	return nil
}

// AddUrls is a simple utility functon used mainly as a shortcut for testing purposes
func (sl *ServerList) AddUrls(urls []string) {
	for _, url := range urls {
		sl.Servers = append(sl.Servers, *CreateServerFromUrl(url))
	}
}