// +build norace

package grpc_test

import (
	"context"
	"fmt"
	"testing"
	"time"

	"github.com/jhump/protoreflect/grpcreflect"

	"github.com/stretchr/testify/require"
	"github.com/stretchr/testify/suite"
	"google.golang.org/grpc"
	"google.golang.org/grpc/metadata"
	rpb "google.golang.org/grpc/reflection/grpc_reflection_v1alpha"

	"github.com/cosmos/cosmos-sdk/testutil/network"
	"github.com/cosmos/cosmos-sdk/testutil/testdata"
	sdk "github.com/cosmos/cosmos-sdk/types"
	grpctypes "github.com/cosmos/cosmos-sdk/types/grpc"
	"github.com/cosmos/cosmos-sdk/types/tx"
	txtypes "github.com/cosmos/cosmos-sdk/types/tx"
	banktestutil "github.com/cosmos/cosmos-sdk/x/bank/client/testutil"
	banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
)

type IntegrationTestSuite struct {
	suite.Suite

	cfg     network.Config
	network *network.Network
	conn    *grpc.ClientConn
}

func (s *IntegrationTestSuite) SetupSuite() {
	s.T().Log("setting up integration test suite")

	s.cfg = network.DefaultConfig()
	s.cfg.NumValidators = 1
	s.network = network.New(s.T(), s.cfg)
	s.Require().NotNil(s.network)

	_, err := s.network.WaitForHeight(2)
	s.Require().NoError(err)

	val0 := s.network.Validators[0]
	s.conn, err = grpc.Dial(
		val0.AppConfig.GRPC.Address,
		grpc.WithInsecure(), // Or else we get "no transport security set"
	)
	s.Require().NoError(err)
}

func (s *IntegrationTestSuite) TearDownSuite() {
	s.T().Log("tearing down integration test suite")
	s.conn.Close()
	s.network.Cleanup()
}

func (s *IntegrationTestSuite) TestGRPCServer_TestService() {
	// gRPC query to test service should work
	testClient := testdata.NewQueryClient(s.conn)
	testRes, err := testClient.Echo(context.Background(), &testdata.EchoRequest{Message: "hello"})
	s.Require().NoError(err)
	s.Require().Equal("hello", testRes.Message)
}

func (s *IntegrationTestSuite) TestGRPCServer_BankBalance() {
	val0 := s.network.Validators[0]

	// gRPC query to bank service should work
	denom := fmt.Sprintf("%stoken", val0.Moniker)
	bankClient := banktypes.NewQueryClient(s.conn)
	var header metadata.MD
	bankRes, err := bankClient.Balance(
		context.Background(),
		&banktypes.QueryBalanceRequest{Address: val0.Address.String(), Denom: denom},
		grpc.Header(&header), // Also fetch grpc header
	)
	s.Require().NoError(err)
	s.Require().Equal(
		sdk.NewCoin(denom, s.network.Config.AccountTokens),
		*bankRes.GetBalance(),
	)
	blockHeight := header.Get(grpctypes.GRPCBlockHeightHeader)
	s.Require().NotEmpty(blockHeight[0]) // Should contain the block height

	// Request metadata should work
	bankRes, err = bankClient.Balance(
		metadata.AppendToOutgoingContext(context.Background(), grpctypes.GRPCBlockHeightHeader, "1"), // Add metadata to request
		&banktypes.QueryBalanceRequest{Address: val0.Address.String(), Denom: denom},
		grpc.Header(&header),
	)
	blockHeight = header.Get(grpctypes.GRPCBlockHeightHeader)
	s.Require().NotEmpty(blockHeight[0]) // blockHeight is []string, first element is block height.
}

func (s *IntegrationTestSuite) TestGRPCServer_Reflection() {
	// Test server reflection
	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
	defer cancel()
	stub := rpb.NewServerReflectionClient(s.conn)
	// NOTE(fdymylja): we use grpcreflect because it solves imports too
	// so that we can always assert that given a reflection server it is
	// possible to fully query all the methods, without having any context
	// on the proto registry
	rc := grpcreflect.NewClient(ctx, stub)

	services, err := rc.ListServices()
	s.Require().NoError(err)
	s.Require().Greater(len(services), 0)

	for _, svc := range services {
		file, err := rc.FileContainingSymbol(svc)
		s.Require().NoError(err)
		sd := file.FindSymbol(svc)
		s.Require().NotNil(sd)
	}
}

func (s *IntegrationTestSuite) TestGRPCServer_GetTxsEvent() {
	// Query the tx via gRPC without pagination. This used to panic, see
	// https://github.com/cosmos/cosmos-sdk/issues/8038.
	txServiceClient := txtypes.NewServiceClient(s.conn)
	_, err := txServiceClient.GetTxsEvent(
		context.Background(),
		&tx.GetTxsEventRequest{
			Events: []string{"message.action='send'"},
		},
	)
	s.Require().NoError(err)
}

func (s *IntegrationTestSuite) TestGRPCServer_BroadcastTx() {
	val0 := s.network.Validators[0]

	grpcRes, err := banktestutil.LegacyGRPCProtoMsgSend(val0.ClientCtx,
		val0.Moniker, val0.Address, val0.Address,
		sdk.Coins{sdk.NewInt64Coin(s.cfg.BondDenom, 10)}, sdk.Coins{sdk.NewInt64Coin(s.cfg.BondDenom, 10)},
	)
	s.Require().NoError(err)
	s.Require().Equal(uint32(0), grpcRes.TxResponse.Code)
}

// Test and enforce that we upfront reject any connections to baseapp containing
// invalid initial x-cosmos-block-height that aren't positive  and in the range [0, max(int64)]
// See issue https://github.com/cosmos/cosmos-sdk/issues/7662.
func (s *IntegrationTestSuite) TestGRPCServerInvalidHeaderHeights() {
	t := s.T()
	val0 := s.network.Validators[0]

	// We should reject connections with invalid block heights off the bat.
	invalidHeightStrs := []struct {
		value   string
		wantErr string
	}{
		{"-1", "\"x-cosmos-block-height\" must be >= 0"},
		{"9223372036854775808", "value out of range"}, // > max(int64) by 1
		{"-10", "\"x-cosmos-block-height\" must be >= 0"},
		{"18446744073709551615", "value out of range"}, // max uint64, which is  > max(int64)
		{"-9223372036854775809", "value out of range"}, // Out of the range of for negative int64
	}
	for _, tt := range invalidHeightStrs {
		t.Run(tt.value, func(t *testing.T) {
			conn, err := grpc.Dial(
				val0.AppConfig.GRPC.Address,
				grpc.WithInsecure(), // Or else we get "no transport security set"
			)
			defer conn.Close()

			testClient := testdata.NewQueryClient(conn)
			ctx := metadata.AppendToOutgoingContext(context.Background(), grpctypes.GRPCBlockHeightHeader, tt.value)
			testRes, err := testClient.Echo(ctx, &testdata.EchoRequest{Message: "hello"})
			require.Error(t, err)
			require.Nil(t, testRes)
			require.Contains(t, err.Error(), tt.wantErr)
		})
	}
}

func TestIntegrationTestSuite(t *testing.T) {
	suite.Run(t, new(IntegrationTestSuite))
}