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package goxy

import (
	"log"
	"net/rpc"
)

type GoXY struct {
	Server *Server
}

func Register(s *Server) {
	rpc.Register(&GoXY{s})
	rpc.HandleHTTP()
}

func DialRPC(server string) (*rpc.Client, error) {
	if server == "" {
		server = ":http-alt"
	}
	return rpc.DialHTTP("tcp", server)
}

// Add adds a new route (server)
func (s *GoXY) Add(e Entry, _ *struct{}) error {
	log.Println("Add route", e)
	defer s.Server.Save()
	s.Server.Route[e.ServerName] = e
	return s.Server.Restore()
}

// Add new entry (client)
func Add(e Entry, server string) error {
	client, err := DialRPC(server)
	if err != nil {
		return err
	}
	defer client.Close()
	return client.Call("GoXY.Add", e, nil)
}

// Del removes a route (server)
func (s *GoXY) Del(serverName string, _ *struct{}) error {
	log.Println("Del route", serverName)
	defer s.Server.Save()
	delete(s.Server.Route, serverName)
	return s.Server.Restore()
}

// Del removes a route (client)
func Del(serverName string, server string) error {
	client, err := DialRPC(server)
	if err != nil {
		return err
	}
	defer client.Close()
	return client.Call("GoXY.Del", serverName, nil)
}

func (s *GoXY) Get(serverName string, e *Entry) error {
	*e = s.Server.Route[serverName]
	return nil
}

func Get(serverName string, server string) (Entry, error) {
	client, err := DialRPC(server)
	if err != nil {
		return Entry{}, err
	}
	defer client.Close()
	var e Entry
	err = client.Call("GoXY.Get", serverName, &e)
	return e, err
}

// List routes
func (s GoXY) List(_ struct{}, r *Route) error {
	*r = s.Server.Route
	return nil
}

func List(server string) (Route, error) {
	client, err := DialRPC(server)
	if err != nil {
		return nil, err
	}
	defer client.Close()
	var r Route
	if err := client.Call("GoXY.List", struct{}{}, &r); err != nil {
		return nil, err
	}
	return r, nil
}