package jobs

import (
	"io/ioutil"
	"net/http"
	"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/amqp"
	"github.com/spiral/roadrunner/v2/plugins/config"
	"github.com/spiral/roadrunner/v2/plugins/informer"
	"github.com/spiral/roadrunner/v2/plugins/jobs"
	"github.com/spiral/roadrunner/v2/plugins/memory"
	"github.com/spiral/roadrunner/v2/plugins/metrics"
	"github.com/spiral/roadrunner/v2/plugins/resetter"
	rpcPlugin "github.com/spiral/roadrunner/v2/plugins/rpc"
	"github.com/spiral/roadrunner/v2/plugins/server"
	"github.com/spiral/roadrunner/v2/tests/mocks"
	"github.com/stretchr/testify/assert"
)

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

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

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

	// general
	mockLogger.EXPECT().Debug("worker destructed", "pid", gomock.Any()).AnyTimes()
	mockLogger.EXPECT().Debug("worker constructed", "pid", gomock.Any()).AnyTimes()
	mockLogger.EXPECT().Debug("Started RPC service", "address", "tcp://127.0.0.1:6001", "plugins", gomock.Any()).Times(1)
	mockLogger.EXPECT().Error(gomock.Any(), gomock.Any(), gomock.Any()).AnyTimes()

	mockLogger.EXPECT().Info("driver ready", "pipeline", "test-2", "start", gomock.Any(), "elapsed", gomock.Any()).Times(1)
	mockLogger.EXPECT().Info("driver ready", "pipeline", "test-3", "start", gomock.Any(), "elapsed", gomock.Any()).Times(1)

	mockLogger.EXPECT().Info("pipeline active", "pipeline", "test-local-2", "start", gomock.Any(), "elapsed", gomock.Any()).Times(1)
	mockLogger.EXPECT().Info("pipeline active", "pipeline", "test-1", "start", gomock.Any(), "elapsed", gomock.Any()).Times(1)
	mockLogger.EXPECT().Info("pipeline active", "pipeline", "test-2-amqp", "start", gomock.Any(), "elapsed", gomock.Any()).Times(1)
	mockLogger.EXPECT().Info("pipeline active", "pipeline", "test-local", "start", gomock.Any(), "elapsed", gomock.Any()).Times(1)
	mockLogger.EXPECT().Info("pipeline active", "pipeline", "test-local-3", "start", gomock.Any(), "elapsed", gomock.Any()).Times(1)

	mockLogger.EXPECT().Warn("pipeline stopped", "pipeline", "test-local-3", "start", gomock.Any(), "elapsed", gomock.Any()).Times(1)
	mockLogger.EXPECT().Warn("pipeline stopped", "pipeline", "test-local-2", "start", gomock.Any(), "elapsed", gomock.Any()).Times(1)
	mockLogger.EXPECT().Warn("pipeline stopped", "pipeline", "test-1", "start", gomock.Any(), "elapsed", gomock.Any()).Times(1)
	mockLogger.EXPECT().Warn("pipeline stopped", "pipeline", "test-2-amqp", "start", gomock.Any(), "elapsed", gomock.Any()).Times(1)
	mockLogger.EXPECT().Warn("pipeline stopped", "pipeline", "test-local", "start", gomock.Any(), "elapsed", gomock.Any()).Times(1)

	mockLogger.EXPECT().Info("delivery channel closed, leaving the rabbit listener").Times(2)

	err = cont.RegisterAll(
		cfg,
		&server.Plugin{},
		&rpcPlugin.Plugin{},
		mockLogger,
		&jobs.Plugin{},
		&resetter.Plugin{},
		&informer.Plugin{},
		&memory.Plugin{},
		&amqp.Plugin{},
	)
	assert.NoError(t, err)

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

	ch, err := cont.Serve()
	if err != nil {
		t.Fatal(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())
				}
			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 * 5)
	stopCh <- struct{}{}
	wg.Wait()
}

func TestJOBSMetrics(t *testing.T) {
	cont, err := endure.NewContainer(nil, endure.SetLogLevel(endure.ErrorLevel))
	if err != nil {
		t.Fatal(err)
	}

	cfg := &config.Viper{}
	cfg.Prefix = "rr"
	cfg.Path = "configs/.rr-jobs-metrics.yaml"

	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().Debug("Started RPC service", "address", "tcp://127.0.0.1:6001", "plugins", gomock.Any()).Times(1)
	mockLogger.EXPECT().Error(gomock.Any(), gomock.Any(), gomock.Any()).AnyTimes()

	mockLogger.EXPECT().Info("job processing started", "start", gomock.Any(), "elapsed", gomock.Any()).MinTimes(1)
	mockLogger.EXPECT().Info("job processed without errors", "ID", gomock.Any(), "start", gomock.Any(), "elapsed", gomock.Any()).MinTimes(1)
	mockLogger.EXPECT().Info("job pushed to the queue", "start", gomock.Any(), "elapsed", gomock.Any()).MinTimes(1)

	mockLogger.EXPECT().Info("pipeline active", "pipeline", "test-3", "start", gomock.Any(), "elapsed", gomock.Any()).Times(1)
	mockLogger.EXPECT().Warn("pipeline stopped", "pipeline", "test-3", "start", gomock.Any(), "elapsed", gomock.Any()).Times(1)

	err = cont.RegisterAll(
		cfg,
		&rpcPlugin.Plugin{},
		&server.Plugin{},
		&jobs.Plugin{},
		&metrics.Plugin{},
		&memory.Plugin{},
		mockLogger,
	)
	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)

	tt := time.NewTimer(time.Minute * 3)
	wg := &sync.WaitGroup{}
	wg.Add(1)

	go func() {
		defer tt.Stop()
		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())
				}
			case <-sig:
				err = cont.Stop()
				if err != nil {
					assert.FailNow(t, "error", err.Error())
				}
				return
			case <-tt.C:
				// timeout
				err = cont.Stop()
				if err != nil {
					assert.FailNow(t, "error", err.Error())
				}
				return
			}
		}
	}()

	time.Sleep(time.Second * 2)

	t.Run("DeclareEphemeralPipeline", declareMemoryPipe)
	t.Run("ConsumeEphemeralPipeline", consumeMemoryPipe)
	t.Run("PushEphemeralPipeline", pushToPipe("test-3"))
	time.Sleep(time.Second)
	t.Run("PushEphemeralPipeline", pushToPipeDelayed("test-3", 5))
	time.Sleep(time.Second)
	t.Run("PushEphemeralPipeline", pushToPipe("test-3"))
	time.Sleep(time.Second * 5)

	genericOut, err := get()
	assert.NoError(t, err)

	assert.Contains(t, genericOut, `rr_jobs_jobs_err 0`)
	assert.Contains(t, genericOut, `rr_jobs_jobs_ok 3`)
	assert.Contains(t, genericOut, `rr_jobs_push_err 0`)
	assert.Contains(t, genericOut, `rr_jobs_push_ok 3`)
	assert.Contains(t, genericOut, "workers_memory_bytes")

	close(sig)
	wg.Wait()
}

const getAddr = "http://127.0.0.1:2112/metrics"

// get request and return body
func get() (string, error) {
	r, err := http.Get(getAddr)
	if err != nil {
		return "", err
	}

	b, err := ioutil.ReadAll(r.Body)
	if err != nil {
		return "", err
	}

	err = r.Body.Close()
	if err != nil {
		return "", err
	}
	// unsafe
	return string(b), err
}