// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: BUSL-1.1

package parallel

import (
	"slices"
	"sync"
	"testing"
	"time"

	"github.com/hashicorp/boundary/internal/cmd/config"
	"github.com/hashicorp/boundary/internal/daemon/controller"
	"github.com/hashicorp/boundary/internal/daemon/worker"
	"github.com/hashicorp/boundary/internal/tests/helper"
	"github.com/hashicorp/go-hclog"
	"github.com/stretchr/testify/require"
)

func TestMultiControllerMultiWorkerConnections(t *testing.T) {
	t.Parallel()

	require := require.New(t)
	logger := hclog.New(&hclog.LoggerOptions{
		Level: hclog.Trace,
	})

	conf, err := config.DevController()
	require.NoError(err)

	c1 := controller.NewTestController(t, &controller.TestControllerOpts{
		Config: conf,
		Logger: logger.Named("c1"),
	})

	c2 := c1.AddClusterControllerMember(t, &controller.TestControllerOpts{
		Logger: c1.Config().Logger.ResetNamed("c2"),
	})

	wg := new(sync.WaitGroup)
	wg.Add(2)
	go func() {
		defer wg.Done()
		helper.ExpectWorkers(t, c1)
	}()
	go func() {
		defer wg.Done()
		helper.ExpectWorkers(t, c2)
	}()
	wg.Wait()

	w1 := worker.NewTestWorker(t, &worker.TestWorkerOpts{
		WorkerAuthKms:     c1.Config().WorkerAuthKms,
		InitialUpstreams:  append(c1.ClusterAddrs(), c2.ClusterAddrs()...),
		Logger:            logger.Named("w1"),
		WorkerRPCInterval: time.Second,
	})

	wg.Add(2)
	go func() {
		defer wg.Done()
		helper.ExpectWorkers(t, c1, w1)
	}()
	go func() {
		defer wg.Done()
		helper.ExpectWorkers(t, c2, w1)
	}()
	wg.Wait()

	w2 := w1.AddClusterWorkerMember(t, &worker.TestWorkerOpts{
		Logger: logger.Named("w2"),
	})

	wg.Add(2)
	go func() {
		defer wg.Done()
		helper.ExpectWorkers(t, c1, w1, w2)
	}()
	go func() {
		defer wg.Done()
		helper.ExpectWorkers(t, c2, w1, w2)
	}()
	wg.Wait()

	require.NoError(w1.Worker().Shutdown())

	wg.Add(2)
	go func() {
		defer wg.Done()
		helper.ExpectWorkers(t, c1, w2)
	}()
	go func() {
		defer wg.Done()
		helper.ExpectWorkers(t, c2, w2)
	}()
	wg.Wait()

	w3 := worker.NewTestWorker(t, &worker.TestWorkerOpts{
		WorkerAuthKms:     c1.Config().WorkerAuthKms,
		InitialUpstreams:  c1.ClusterAddrs(),
		Logger:            logger.Named("w3"),
		WorkerRPCInterval: time.Second,
	})

	wg.Add(2)
	go func() {
		defer wg.Done()
		helper.ExpectWorkers(t, c1, w2, w3)
	}()
	go func() {
		defer wg.Done()
		helper.ExpectWorkers(t, c2, w2, w3)
	}()
	wg.Wait()

	require.NoError(c2.Controller().Shutdown())

	helper.ExpectWorkers(t, c1, w2, w3)

	c3 := c1.AddClusterControllerMember(t, &controller.TestControllerOpts{
		Logger: c1.Config().Logger.ResetNamed("c3"),
	})

	wg.Add(2)
	go func() {
		defer wg.Done()
		helper.ExpectWorkers(t, c1, w2, w3)
	}()
	go func() {
		defer wg.Done()
		helper.ExpectWorkers(t, c3, w2, w3)
	}()
	wg.Wait()
}

func TestWorkerAppendInitialUpstreams(t *testing.T) {
	t.Parallel()

	require := require.New(t)
	logger := hclog.New(&hclog.LoggerOptions{
		Level: hclog.Trace,
	})

	conf, err := config.DevController()
	require.NoError(err)

	c1 := controller.NewTestController(t, &controller.TestControllerOpts{
		Config: conf,
		Logger: logger.Named("c1"),
	})

	helper.ExpectWorkers(t, c1)

	initialUpstreams := append(c1.ClusterAddrs(), "127.0.0.9")
	w1 := worker.NewTestWorker(t, &worker.TestWorkerOpts{
		WorkerAuthKms:    c1.Config().WorkerAuthKms,
		InitialUpstreams: initialUpstreams,
		Logger:           logger.Named("w1"),
		SuccessfulControllerRPCGracePeriodDuration: 1 * time.Second,
		WorkerRPCInterval:                          time.Second,
	})

	// Wait for worker to send routing info
	require.Eventually(func() bool {
		if err := w1.Worker().WaitForNextSuccessfulRoutingInfoUpdate(); err != nil {
			return false
		}
		return true
	}, 30*time.Second, time.Second)

	// Upstreams should be equivalent to the controller cluster addr after routing info updates
	require.Eventually(func() bool {
		if w1.Worker().LastRoutingInfoSuccess() == nil {
			return false
		}
		return slices.Equal(c1.ClusterAddrs(), w1.Worker().LastRoutingInfoSuccess().LastCalculatedUpstreams)
	}, 30*time.Second, time.Second)

	// Bring down the controller
	wg := new(sync.WaitGroup)
	wg.Add(1)
	go func() {
		defer wg.Done()
		c1.Shutdown()
	}()

	// Upstreams should now match initial upstreams
	require.Eventually(func() bool {
		return slices.Equal(initialUpstreams, w1.Worker().LastRoutingInfoSuccess().LastCalculatedUpstreams)
	}, 30*time.Second, time.Second)
	wg.Wait()
}