// Copyright 2021 The Chromium OS 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 main

import (
	"bytes"
	"context"
	"log"
	"net"
	"testing"

	"go.chromium.org/chromiumos/config/go/test/lab/api"
	"google.golang.org/grpc"
)

func getTopology(t *testing.T, options *Options) *api.DutTopology {
	var logBuf bytes.Buffer
	l, err := net.Listen("tcp", ":0")
	if err != nil {
		t.Fatal("Failed to create a net listener: ", err)
	}

	ctx := context.Background()
	srv, err := newInventoryServer(
		l,
		log.New(&logBuf, "", log.LstdFlags|log.LUTC),
		options,
	)
	if err != nil {
		t.Fatalf("Failed to start InventoryServer: %v", err)
	}
	go srv.Serve(l)
	defer srv.Stop()

	conn, err := grpc.Dial(l.Addr().String(), grpc.WithInsecure())
	if err != nil {
		t.Fatalf("Failed to dial: %v", err)
	}
	defer conn.Close()

	cl := api.NewInventoryServiceClient(conn)
	stream, err := cl.GetDutTopology(ctx, &api.GetDutTopologyRequest{})
	if err != nil {
		t.Fatalf("Failed at InventoryServer.GetDutTopology: %v", err)
	}
	response := &api.GetDutTopologyResponse{}
	err = stream.RecvMsg(response)
	if err != nil {
		t.Fatalf("Failed at get response: %v", err)
	}
	return response.GetSuccess().DutTopology
}

// InventoryServer handles empty requests gracefully.
func TestInventoryServer_Empty(t *testing.T) {
	getTopology(t, &Options{})
}

// InventoryServer handles Dut Address/Port options passed
func TestInventoryServer_DutAddressOption(t *testing.T) {
	dutAddress := "fake-hostname"
	dutPort := 27
	dutTopology := getTopology(t, &Options{
		DutAddress: dutAddress,
		DutPort:    dutPort,
	})

	ssh := dutTopology.Dut.GetChromeos().GetSsh()

	if ssh.Address != dutAddress || ssh.Port != int32(dutPort) {
		t.Fatalf("Expected address: %s and port: %d; Got: %s", dutAddress, dutPort, ssh.String())
	}
}