//go:build linux
// +build linux

package service

import (
	"os"
	"os/signal"
	"sync"
	"syscall"
	"testing"
	"time"

	"github.com/golang/mock/gomock"
	endure "github.com/spiral/endure/pkg/container"
	"github.com/spiral/roadrunner/v2/plugins/config"
	"github.com/spiral/roadrunner/v2/plugins/service"
	"github.com/spiral/roadrunner/v2/tests/mocks"
	"github.com/stretchr/testify/assert"
)

func TestServiceInit(t *testing.T) {
	cont, err := endure.NewContainer(nil, endure.SetLogLevel(endure.ErrorLevel))
	assert.NoError(t, err)

	cfg := &config.Viper{
		Path:   "configs/.rr-service-init.yaml",
		Prefix: "rr",
	}

	controller := gomock.NewController(t)
	mockLogger := mocks.NewMockLogger(controller)

	mockLogger.EXPECT().Debug("worker destructed", "pid", gomock.Any()).AnyTimes()
	mockLogger.EXPECT().Debug("worker constructed", "pid", gomock.Any()).AnyTimes()
	mockLogger.EXPECT().Info("The number is: 0\n").MinTimes(1)
	mockLogger.EXPECT().Info("The number is: 1\n").MinTimes(1)
	mockLogger.EXPECT().Info("The number is: 2\n").MinTimes(1)
	mockLogger.EXPECT().Info("The number is: 3\n").MinTimes(1)
	mockLogger.EXPECT().Info("The number is: 4\n").AnyTimes()

	// process interrupt error
	mockLogger.EXPECT().Error("process wait error", gomock.Any()).MinTimes(2)

	mockLogger.EXPECT().Info("Hello 0").MinTimes(1)
	mockLogger.EXPECT().Info("Hello 1").MinTimes(1)
	mockLogger.EXPECT().Info("Hello 2").MinTimes(1)
	mockLogger.EXPECT().Info("Hello 3").MinTimes(1)
	mockLogger.EXPECT().Info("Hello 4").AnyTimes()

	err = cont.RegisterAll(
		cfg,
		mockLogger,
		&service.Plugin{},
	)
	assert.NoError(t, err)

	err = cont.Init()
	if err != nil {
		t.Fatal(err)
	}

	ch, err := cont.Serve()
	assert.NoError(t, err)

	sig := make(chan os.Signal, 1)
	signal.Notify(sig, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)

	wg := &sync.WaitGroup{}
	wg.Add(1)

	stopCh := make(chan struct{}, 1)

	go func() {
		defer wg.Done()
		for {
			select {
			case e := <-ch:
				assert.Fail(t, "error", e.Error.Error())
				err = cont.Stop()
				if err != nil {
					assert.FailNow(t, "error", err.Error())
				}
				return
			case <-sig:
				err = cont.Stop()
				if err != nil {
					assert.FailNow(t, "error", err.Error())
				}
				return
			case <-stopCh:
				// timeout
				err = cont.Stop()
				if err != nil {
					assert.FailNow(t, "error", err.Error())
				}
				return
			}
		}
	}()

	time.Sleep(time.Second * 10)
	stopCh <- struct{}{}
	wg.Wait()
}

func TestServiceError(t *testing.T) {
	cont, err := endure.NewContainer(nil, endure.SetLogLevel(endure.ErrorLevel))
	assert.NoError(t, err)

	cfg := &config.Viper{
		Path:   "configs/.rr-service-error.yaml",
		Prefix: "rr",
	}

	controller := gomock.NewController(t)
	mockLogger := mocks.NewMockLogger(controller)

	mockLogger.EXPECT().Debug("worker destructed", "pid", gomock.Any()).AnyTimes()
	mockLogger.EXPECT().Debug("worker constructed", "pid", gomock.Any()).AnyTimes()

	// process interrupt error
	mockLogger.EXPECT().Error("process wait error", gomock.Any()).MinTimes(2)

	err = cont.RegisterAll(
		cfg,
		mockLogger,
		&service.Plugin{},
	)
	assert.NoError(t, err)

	err = cont.Init()
	assert.NoError(t, err)
	ch, err := cont.Serve()
	assert.NoError(t, err)

	sig := make(chan os.Signal, 1)
	signal.Notify(sig, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)

	wg := &sync.WaitGroup{}
	wg.Add(1)

	stopCh := make(chan struct{}, 1)

	go func() {
		defer wg.Done()
		for {
			select {
			case e := <-ch:
				assert.Fail(t, "error", e.Error.Error())
				err = cont.Stop()
				if err != nil {
					assert.FailNow(t, "error", err.Error())
				}
				return
			case <-sig:
				err = cont.Stop()
				if err != nil {
					assert.FailNow(t, "error", err.Error())
				}
				return
			case <-stopCh:
				// timeout
				err = cont.Stop()
				if err != nil {
					assert.FailNow(t, "error", err.Error())
				}
				return
			}
		}
	}()

	time.Sleep(time.Second * 10)
	stopCh <- struct{}{}
	wg.Wait()
}

func TestServiceRestarts(t *testing.T) {
	cont, err := endure.NewContainer(nil, endure.SetLogLevel(endure.ErrorLevel))
	assert.NoError(t, err)

	cfg := &config.Viper{
		Path:   "configs/.rr-service-restarts.yaml",
		Prefix: "rr",
	}

	controller := gomock.NewController(t)
	mockLogger := mocks.NewMockLogger(controller)

	mockLogger.EXPECT().Debug("worker destructed", "pid", gomock.Any()).AnyTimes()
	mockLogger.EXPECT().Debug("worker constructed", "pid", gomock.Any()).AnyTimes()

	// process interrupt error
	mockLogger.EXPECT().Error("process wait error", gomock.Any()).MinTimes(1)

	// should not be more than Hello 0, because of restarts
	mockLogger.EXPECT().Info("Hello 0").MinTimes(1)
	mockLogger.EXPECT().Info("Hello 1").AnyTimes()

	err = cont.RegisterAll(
		cfg,
		mockLogger,
		&service.Plugin{},
	)
	assert.NoError(t, err)

	err = cont.Init()
	if err != nil {
		t.Fatal(err)
	}

	ch, err := cont.Serve()
	assert.NoError(t, err)

	sig := make(chan os.Signal, 1)
	signal.Notify(sig, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)

	wg := &sync.WaitGroup{}
	wg.Add(1)

	stopCh := make(chan struct{}, 1)

	go func() {
		defer wg.Done()
		for {
			select {
			case e := <-ch:
				assert.Fail(t, "error", e.Error.Error())
				err = cont.Stop()
				if err != nil {
					assert.FailNow(t, "error", err.Error())
				}
				return
			case <-sig:
				err = cont.Stop()
				if err != nil {
					assert.FailNow(t, "error", err.Error())
				}
				return
			case <-stopCh:
				// timeout
				err = cont.Stop()
				if err != nil {
					assert.FailNow(t, "error", err.Error())
				}
				return
			}
		}
	}()

	time.Sleep(time.Second * 10)
	stopCh <- struct{}{}
	wg.Wait()
}