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/*
 * Copyright (C) 2017-2018 "IoT.bzh"
 * Author Clément Bénier <clement.benier@iot.bzh>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package xdsservertest

import (
	"fmt"
	"log"
	"os"
	"path"
	"regexp"
	"sync"
	"testing"
	"time"

	"gerrit.automotivelinux.org/gerrit/src/xds/xds-server/lib/xsapiv1"
	socketio_client "github.com/sebd71/go-socket.io-client"
	"github.com/stretchr/testify/assert"
)

var ch chan xsapiv1.SDK

// Disconnection Channel used to notify XDS Server disconnection
//type Disconnection struct {
//	error   string
//	code    int
//	svrConf ServerCfg
//}

// IOSockClient .
type IOSockClient struct {
	URL       string
	Conn      *socketio_client.Client
	Options   *socketio_client.Options
	EmitMutex *sync.Mutex
	Connected bool
	//ServerDiscoChan chan Disconnection
	EscapeKeys []byte
}

func NewIoSocketClient(url, clientID string) (*IOSockClient, error) {

	var err error

	sCli := &IOSockClient{
		URL:       url,
		EmitMutex: &sync.Mutex{},
		Options: &socketio_client.Options{
			Transport: "websocket",
			Header:    make(map[string][]string),
		},
		//ServerDiscoChan: make(chan Disconnection, 1),
	}
	sCli.Options.Header["XDS-SID"] = []string{clientID}

	sCli.Conn, err = socketio_client.NewClient(url, sCli.Options)
	if err != nil {
		return nil, fmt.Errorf("IO.socket connection error: " + err.Error())
	}

	sCli.Conn.On("connection", func() {
		sCli.Connected = true
	})

	sCli.Conn.On("disconnection", func(err error) {
		log.Printf("WS disconnection event with err: %v\n", err)
		sCli.Connected = false
	})

	sCli.Conn.On(xsapiv1.EVTSDKStateChange, func(e xsapiv1.EventMsg) {
		sdk, _ := e.DecodeSDKEvent()
		ch <- sdk
	})

	args := xsapiv1.EventRegisterArgs{Name: xsapiv1.EVTSDKStateChange}
	if err := HTTPCli.Post("/events/register", args, nil); err != nil {
		return sCli, err
	}

	//sCli.Conn.On(xsapiv1.)

	return sCli, nil
}

func TestSdks(t *testing.T) {
	var sdkArray []xsapiv1.SDK
	assert.Nil(t, HTTPCli.Get("/sdks", &sdkArray))
	_, err := os.Stat(path.Join(sdkDir, "sdks_latest.json"))
	assert.Nil(t, err)
	t.Logf("Connect websocket with url=%v clientId=%v\n", prefixURL, HTTPCli.GetClientID())
	_, err = NewIoSocketClient(prefixURL, HTTPCli.GetClientID())
	if err != nil {
		t.Fatal(err)
	}

	ch = make(chan xsapiv1.SDK)

	for i := 0; i < len(sdkArray); i++ {
		re := regexp.MustCompile("^[0-9a-z]+-[0-9a-z]+-[0-9a-z]+-[0-9a-z]+-[0-9a-z]+$")
		assert.True(t, re.MatchString(sdkArray[i].ID))
		assert.Equal(t, sdkArray[0].Status, "Not Installed")

		var sdk xsapiv1.SDK
		assert.Nil(t, HTTPCli.Get("/sdks/"+sdkArray[i].ID, &sdk))
		assert.Equal(t, sdkArray[i], sdk)

		var sdkRes xsapiv1.SDK
		assert.Nil(t, HTTPCli.Post("/sdks", sdk, &sdkRes))
		assert.Equal(t, sdkRes.Status, "Installing")
		time.Sleep(1 * time.Millisecond)
		assert.Nil(t, HTTPCli.Post("/sdks/abortinstall", sdk, &sdkRes))
		assert.Equal(t, sdkRes.Status, "Not Installed")
		time.Sleep(1 * time.Millisecond)
		sdkFromEvent := <-ch
		assert.Equal(t, sdkRes.ID, sdkFromEvent.ID)
		assert.Equal(t, sdkRes.Status, sdkFromEvent.Status)
	}
}

func installFakeSdk(t *testing.T, sdkInstall xsapiv1.SDKInstallArgs) xsapiv1.SDK {
	var sdkRes xsapiv1.SDK
	assert.Nil(t, HTTPCli.Post("/sdks", sdkInstall, &sdkRes))
	assert.Equal(t, sdkRes.Status, "Installing")
	/*waiting for SDKStateChange event from channel*/
	sdkFromEvent := <-ch
	t.Log(sdkFromEvent)
	assert.Equal(t, sdkRes.ID, sdkFromEvent.ID)
	assert.Equal(t, "Installed", sdkFromEvent.Status)
	return sdkFromEvent
}

func TestInstallFakeSdk(t *testing.T) {
	sdk := xsapiv1.SDKInstallArgs{
		ID:       "",
		Filename: sdkFileName,
		Force:    false,
	}
	installFakeSdk(t, sdk)
	var sdkRes xsapiv1.SDK
	assert.NotNil(t, HTTPCli.Post("/sdks", sdk, &sdkRes))
	sdk.Force = true
	//installFakeSdk(t, sdk)
}

func TestSdksError(t *testing.T) {
	sdk := xsapiv1.SDKInstallArgs{
		ID:       "",
		Filename: "",
		Force:    false,
	}
	var sdkRes xsapiv1.SDK
	assert.NotNil(t, HTTPCli.Post("/sdks", sdk, &sdkRes))
	sdk.ID = "42885c24-374e-3ef0-9723-0ce8a05191aa"
	assert.NotNil(t, HTTPCli.Post("/sdks", sdk, &sdkRes))
	sdk.Filename = "fake"
	assert.NotNil(t, HTTPCli.Post("/sdks", sdk, &sdkRes))
}