// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package controlclient

import (
	"encoding/json"
	"testing"

	"inet.af/netaddr"
	"tailscale.com/tailcfg"
	"tailscale.com/types/wgkey"
)

func TestNewDirect(t *testing.T) {
	hi := NewHostinfo()
	ni := tailcfg.NetInfo{LinkType: "wired"}
	hi.NetInfo = &ni

	key, err := wgkey.NewPrivate()
	if err != nil {
		t.Error(err)
	}
	opts := Options{
		ServerURL: "https://example.com",
		Hostinfo:  hi,
		GetMachinePrivateKey: func() (wgkey.Private, error) {
			return key, nil
		},
	}
	c, err := NewDirect(opts)
	if err != nil {
		t.Fatal(err)
	}

	if c.serverURL != opts.ServerURL {
		t.Errorf("c.serverURL got %v want %v", c.serverURL, opts.ServerURL)
	}

	if !hi.Equal(c.hostinfo) {
		t.Errorf("c.hostinfo got %v want %v", c.hostinfo, hi)
	}

	changed := c.SetNetInfo(&ni)
	if changed {
		t.Errorf("c.SetNetInfo(ni) want false got %v", changed)
	}
	ni = tailcfg.NetInfo{LinkType: "wifi"}
	changed = c.SetNetInfo(&ni)
	if !changed {
		t.Errorf("c.SetNetInfo(ni) want true got %v", changed)
	}

	changed = c.SetHostinfo(hi)
	if changed {
		t.Errorf("c.SetHostinfo(hi) want false got %v", changed)
	}
	hi = NewHostinfo()
	hi.Hostname = "different host name"
	changed = c.SetHostinfo(hi)
	if !changed {
		t.Errorf("c.SetHostinfo(hi) want true got %v", changed)
	}

	endpoints := fakeEndpoints(1, 2, 3)
	changed = c.newEndpoints(12, endpoints)
	if !changed {
		t.Errorf("c.newEndpoints(12) want true got %v", changed)
	}
	changed = c.newEndpoints(12, endpoints)
	if changed {
		t.Errorf("c.newEndpoints(12) want false got %v", changed)
	}
	changed = c.newEndpoints(13, endpoints)
	if !changed {
		t.Errorf("c.newEndpoints(13) want true got %v", changed)
	}
	endpoints = fakeEndpoints(4, 5, 6)
	changed = c.newEndpoints(13, endpoints)
	if !changed {
		t.Errorf("c.newEndpoints(13) want true got %v", changed)
	}
}

func fakeEndpoints(ports ...uint16) (ret []tailcfg.Endpoint) {
	for _, port := range ports {
		ret = append(ret, tailcfg.Endpoint{
			Addr: netaddr.IPPort{Port: port},
		})
	}
	return
}

func TestNewHostinfo(t *testing.T) {
	hi := NewHostinfo()
	if hi == nil {
		t.Fatal("no Hostinfo")
	}
	j, err := json.MarshalIndent(hi, "  ", "")
	if err != nil {
		t.Fatal(err)
	}
	t.Logf("Got: %s", j)
}