package client

import (
	"context"
	"testing"
	"time"

	"github.com/golang/mock/gomock"
	"github.com/pkg/errors"
	ethpb "github.com/prysmaticlabs/ethereumapis/eth/v1alpha1"
	"github.com/prysmaticlabs/prysm/shared/bls"
	"github.com/prysmaticlabs/prysm/shared/mock"
	"github.com/prysmaticlabs/prysm/shared/testutil/assert"
	"github.com/prysmaticlabs/prysm/shared/testutil/require"
	logTest "github.com/sirupsen/logrus/hooks/test"
)

func TestWaitActivation_ContextCanceled(t *testing.T) {
	ctrl := gomock.NewController(t)
	defer ctrl.Finish()
	client := mock.NewMockBeaconNodeValidatorClient(ctrl)
	privKey, err := bls.RandKey()
	require.NoError(t, err)
	pubKey := [48]byte{}
	copy(pubKey[:], privKey.PublicKey().Marshal())
	km := &mockKeymanager{
		keysMap: map[[48]byte]bls.SecretKey{
			pubKey: privKey,
		},
	}
	v := validator{
		validatorClient: client,
		keyManager:      km,
	}
	clientStream := mock.NewMockBeaconNodeValidator_WaitForActivationClient(ctrl)

	client.EXPECT().WaitForActivation(
		gomock.Any(),
		&ethpb.ValidatorActivationRequest{
			PublicKeys: [][]byte{pubKey[:]},
		},
	).Return(clientStream, nil)
	clientStream.EXPECT().Recv().Return(
		&ethpb.ValidatorActivationResponse{},
		nil,
	)
	ctx, cancel := context.WithCancel(context.Background())
	cancel()
	assert.ErrorContains(t, cancelledCtx, v.WaitForActivation(ctx))
}

func TestWaitActivation_StreamSetupFails_AttemptsToReconnect(t *testing.T) {
	ctrl := gomock.NewController(t)
	defer ctrl.Finish()
	client := mock.NewMockBeaconNodeValidatorClient(ctrl)
	privKey, err := bls.RandKey()
	require.NoError(t, err)
	pubKey := [48]byte{}
	copy(pubKey[:], privKey.PublicKey().Marshal())
	km := &mockKeymanager{
		keysMap: map[[48]byte]bls.SecretKey{
			pubKey: privKey,
		},
	}
	v := validator{
		validatorClient: client,
		keyManager:      km,
	}
	clientStream := mock.NewMockBeaconNodeValidator_WaitForActivationClient(ctrl)
	client.EXPECT().WaitForActivation(
		gomock.Any(),
		&ethpb.ValidatorActivationRequest{
			PublicKeys: [][]byte{pubKey[:]},
		},
	).Return(clientStream, errors.New("failed stream")).Return(clientStream, nil)

	resp := generateMockStatusResponse([][]byte{pubKey[:]})
	resp.Statuses[0].Status.Status = ethpb.ValidatorStatus_ACTIVE
	clientStream.EXPECT().Recv().Return(resp, nil)
	assert.NoError(t, v.WaitForActivation(context.Background()))
}

func TestWaitForActivation_ReceiveErrorFromStream_AttemptsReconnection(t *testing.T) {
	ctrl := gomock.NewController(t)
	defer ctrl.Finish()
	client := mock.NewMockBeaconNodeValidatorClient(ctrl)

	privKey, err := bls.RandKey()
	require.NoError(t, err)
	pubKey := [48]byte{}
	copy(pubKey[:], privKey.PublicKey().Marshal())
	km := &mockKeymanager{
		keysMap: map[[48]byte]bls.SecretKey{
			pubKey: privKey,
		},
	}
	v := validator{
		validatorClient: client,
		keyManager:      km,
	}
	clientStream := mock.NewMockBeaconNodeValidator_WaitForActivationClient(ctrl)
	client.EXPECT().WaitForActivation(
		gomock.Any(),
		&ethpb.ValidatorActivationRequest{
			PublicKeys: [][]byte{pubKey[:]},
		},
	).Return(clientStream, nil)
	// A stream fails the first time, but succeeds the second time.
	resp := generateMockStatusResponse([][]byte{pubKey[:]})
	resp.Statuses[0].Status.Status = ethpb.ValidatorStatus_ACTIVE
	clientStream.EXPECT().Recv().Return(
		nil,
		errors.New("fails"),
	).Return(resp, nil)
	assert.NoError(t, v.WaitForActivation(context.Background()))
}

func TestWaitActivation_LogsActivationEpochOK(t *testing.T) {
	hook := logTest.NewGlobal()
	ctrl := gomock.NewController(t)
	defer ctrl.Finish()
	client := mock.NewMockBeaconNodeValidatorClient(ctrl)
	privKey, err := bls.RandKey()
	require.NoError(t, err)
	pubKey := [48]byte{}
	copy(pubKey[:], privKey.PublicKey().Marshal())
	km := &mockKeymanager{
		keysMap: map[[48]byte]bls.SecretKey{
			pubKey: privKey,
		},
	}
	v := validator{
		validatorClient: client,
		keyManager:      km,
		genesisTime:     1,
	}
	resp := generateMockStatusResponse([][]byte{pubKey[:]})
	resp.Statuses[0].Status.Status = ethpb.ValidatorStatus_ACTIVE
	clientStream := mock.NewMockBeaconNodeValidator_WaitForActivationClient(ctrl)
	client.EXPECT().WaitForActivation(
		gomock.Any(),
		&ethpb.ValidatorActivationRequest{
			PublicKeys: [][]byte{pubKey[:]},
		},
	).Return(clientStream, nil)
	clientStream.EXPECT().Recv().Return(
		resp,
		nil,
	)
	assert.NoError(t, v.WaitForActivation(context.Background()), "Could not wait for activation")
	require.LogsContain(t, hook, "Validator activated")
}

func TestWaitForActivation_Exiting(t *testing.T) {
	ctrl := gomock.NewController(t)
	defer ctrl.Finish()
	client := mock.NewMockBeaconNodeValidatorClient(ctrl)
	privKey, err := bls.RandKey()
	require.NoError(t, err)
	pubKey := [48]byte{}
	copy(pubKey[:], privKey.PublicKey().Marshal())
	km := &mockKeymanager{
		keysMap: map[[48]byte]bls.SecretKey{
			pubKey: privKey,
		},
	}
	v := validator{
		validatorClient: client,
		keyManager:      km,
		genesisTime:     1,
	}
	resp := generateMockStatusResponse([][]byte{pubKey[:]})
	resp.Statuses[0].Status.Status = ethpb.ValidatorStatus_EXITING
	clientStream := mock.NewMockBeaconNodeValidator_WaitForActivationClient(ctrl)
	client.EXPECT().WaitForActivation(
		gomock.Any(),
		&ethpb.ValidatorActivationRequest{
			PublicKeys: [][]byte{pubKey[:]},
		},
	).Return(clientStream, nil)
	clientStream.EXPECT().Recv().Return(
		resp,
		nil,
	)
	require.NoError(t, v.WaitForActivation(context.Background()))
}

func TestWaitForActivation_RefetchKeys(t *testing.T) {
	originalPeriod := keyRefetchPeriod
	defer func() {
		keyRefetchPeriod = originalPeriod
	}()
	keyRefetchPeriod = 5 * time.Second

	hook := logTest.NewGlobal()
	ctrl := gomock.NewController(t)
	defer ctrl.Finish()
	client := mock.NewMockBeaconNodeValidatorClient(ctrl)
	privKey, err := bls.RandKey()
	require.NoError(t, err)
	pubKey := [48]byte{}
	copy(pubKey[:], privKey.PublicKey().Marshal())
	km := &mockKeymanager{
		keysMap: map[[48]byte]bls.SecretKey{
			pubKey: privKey,
		},
		fetchNoKeys: true,
	}
	v := validator{
		validatorClient: client,
		keyManager:      km,
		genesisTime:     1,
	}
	resp := generateMockStatusResponse([][]byte{pubKey[:]})
	resp.Statuses[0].Status.Status = ethpb.ValidatorStatus_ACTIVE
	clientStream := mock.NewMockBeaconNodeValidator_WaitForActivationClient(ctrl)
	client.EXPECT().WaitForActivation(
		gomock.Any(),
		&ethpb.ValidatorActivationRequest{
			PublicKeys: [][]byte{pubKey[:]},
		},
	).Return(clientStream, nil)
	clientStream.EXPECT().Recv().Return(
		resp,
		nil,
	)
	assert.NoError(t, v.WaitForActivation(context.Background()), "Could not wait for activation")
	assert.LogsContain(t, hook, msgNoKeysFetched)
	assert.LogsContain(t, hook, "Validator activated")
}