package consul

import (
	"encoding/base64"
	"os"
	"testing"

	"github.com/hashicorp/consul/acl"
	"github.com/hashicorp/consul/agent/structs"
	"github.com/hashicorp/consul/api"
	"github.com/hashicorp/consul/lib"
	"github.com/hashicorp/consul/testrpc"
	"github.com/hashicorp/net-rpc-msgpackrpc"

	"github.com/stretchr/testify/require"
)

func TestInternal_NodeInfo(t *testing.T) {
	t.Parallel()
	dir1, s1 := testServer(t)
	defer os.RemoveAll(dir1)
	defer s1.Shutdown()
	codec := rpcClient(t, s1)
	defer codec.Close()

	testrpc.WaitForLeader(t, s1.RPC, "dc1")

	arg := structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
		Service: &structs.NodeService{
			ID:      "db",
			Service: "db",
			Tags:    []string{"master"},
		},
		Check: &structs.HealthCheck{
			Name:      "db connect",
			Status:    api.HealthPassing,
			ServiceID: "db",
		},
	}
	var out struct{}
	if err := msgpackrpc.CallWithCodec(codec, "Catalog.Register", &arg, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	var out2 structs.IndexedNodeDump
	req := structs.NodeSpecificRequest{
		Datacenter: "dc1",
		Node:       "foo",
	}
	if err := msgpackrpc.CallWithCodec(codec, "Internal.NodeInfo", &req, &out2); err != nil {
		t.Fatalf("err: %v", err)
	}

	nodes := out2.Dump
	if len(nodes) != 1 {
		t.Fatalf("Bad: %v", nodes)
	}
	if nodes[0].Node != "foo" {
		t.Fatalf("Bad: %v", nodes[0])
	}
	if !lib.StrContains(nodes[0].Services[0].Tags, "master") {
		t.Fatalf("Bad: %v", nodes[0])
	}
	if nodes[0].Checks[0].Status != api.HealthPassing {
		t.Fatalf("Bad: %v", nodes[0])
	}
}

func TestInternal_NodeDump(t *testing.T) {
	t.Parallel()
	dir1, s1 := testServer(t)
	defer os.RemoveAll(dir1)
	defer s1.Shutdown()
	codec := rpcClient(t, s1)
	defer codec.Close()

	testrpc.WaitForLeader(t, s1.RPC, "dc1")

	arg := structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
		Service: &structs.NodeService{
			ID:      "db",
			Service: "db",
			Tags:    []string{"master"},
		},
		Check: &structs.HealthCheck{
			Name:      "db connect",
			Status:    api.HealthPassing,
			ServiceID: "db",
		},
	}
	var out struct{}
	if err := msgpackrpc.CallWithCodec(codec, "Catalog.Register", &arg, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	arg = structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "bar",
		Address:    "127.0.0.2",
		Service: &structs.NodeService{
			ID:      "db",
			Service: "db",
			Tags:    []string{"slave"},
		},
		Check: &structs.HealthCheck{
			Name:      "db connect",
			Status:    api.HealthWarning,
			ServiceID: "db",
		},
	}
	if err := msgpackrpc.CallWithCodec(codec, "Catalog.Register", &arg, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	var out2 structs.IndexedNodeDump
	req := structs.DCSpecificRequest{
		Datacenter: "dc1",
	}
	if err := msgpackrpc.CallWithCodec(codec, "Internal.NodeDump", &req, &out2); err != nil {
		t.Fatalf("err: %v", err)
	}

	nodes := out2.Dump
	if len(nodes) != 3 {
		t.Fatalf("Bad: %v", nodes)
	}

	var foundFoo, foundBar bool
	for _, node := range nodes {
		switch node.Node {
		case "foo":
			foundFoo = true
			if !lib.StrContains(node.Services[0].Tags, "master") {
				t.Fatalf("Bad: %v", nodes[0])
			}
			if node.Checks[0].Status != api.HealthPassing {
				t.Fatalf("Bad: %v", nodes[0])
			}

		case "bar":
			foundBar = true
			if !lib.StrContains(node.Services[0].Tags, "slave") {
				t.Fatalf("Bad: %v", nodes[1])
			}
			if node.Checks[0].Status != api.HealthWarning {
				t.Fatalf("Bad: %v", nodes[1])
			}

		default:
			continue
		}
	}
	if !foundFoo || !foundBar {
		t.Fatalf("missing foo or bar")
	}
}

func TestInternal_NodeDump_Filter(t *testing.T) {
	t.Parallel()
	dir1, s1 := testServer(t)
	defer os.RemoveAll(dir1)
	defer s1.Shutdown()
	codec := rpcClient(t, s1)
	defer codec.Close()

	testrpc.WaitForLeader(t, s1.RPC, "dc1")

	arg := structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
		Service: &structs.NodeService{
			ID:      "db",
			Service: "db",
			Tags:    []string{"master"},
		},
		Check: &structs.HealthCheck{
			Name:      "db connect",
			Status:    api.HealthPassing,
			ServiceID: "db",
		},
	}
	var out struct{}
	require.NoError(t, msgpackrpc.CallWithCodec(codec, "Catalog.Register", &arg, &out))

	arg = structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "bar",
		Address:    "127.0.0.2",
		Service: &structs.NodeService{
			ID:      "db",
			Service: "db",
			Tags:    []string{"slave"},
		},
		Check: &structs.HealthCheck{
			Name:      "db connect",
			Status:    api.HealthWarning,
			ServiceID: "db",
		},
	}

	require.NoError(t, msgpackrpc.CallWithCodec(codec, "Catalog.Register", &arg, &out))

	var out2 structs.IndexedNodeDump
	req := structs.DCSpecificRequest{
		Datacenter:   "dc1",
		QueryOptions: structs.QueryOptions{Filter: "master in Services.Tags"},
	}
	require.NoError(t, msgpackrpc.CallWithCodec(codec, "Internal.NodeDump", &req, &out2))

	nodes := out2.Dump
	require.Len(t, nodes, 1)
	require.Equal(t, "foo", nodes[0].Node)
}

func TestInternal_KeyringOperation(t *testing.T) {
	t.Parallel()
	key1 := "H1dfkSZOVnP/JUnaBfTzXg=="
	keyBytes1, err := base64.StdEncoding.DecodeString(key1)
	if err != nil {
		t.Fatalf("err: %s", err)
	}
	dir1, s1 := testServerWithConfig(t, func(c *Config) {
		c.SerfLANConfig.MemberlistConfig.SecretKey = keyBytes1
		c.SerfWANConfig.MemberlistConfig.SecretKey = keyBytes1
	})
	defer os.RemoveAll(dir1)
	defer s1.Shutdown()
	codec := rpcClient(t, s1)
	defer codec.Close()

	testrpc.WaitForLeader(t, s1.RPC, "dc1")

	var out structs.KeyringResponses
	req := structs.KeyringRequest{
		Operation:  structs.KeyringList,
		Datacenter: "dc1",
	}
	if err := msgpackrpc.CallWithCodec(codec, "Internal.KeyringOperation", &req, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Two responses (local lan/wan pools) from single-node cluster
	if len(out.Responses) != 2 {
		t.Fatalf("bad: %#v", out)
	}
	if _, ok := out.Responses[0].Keys[key1]; !ok {
		t.Fatalf("bad: %#v", out)
	}
	wanResp, lanResp := 0, 0
	for _, resp := range out.Responses {
		if resp.WAN {
			wanResp++
		} else {
			lanResp++
		}
	}
	if lanResp != 1 || wanResp != 1 {
		t.Fatalf("should have one lan and one wan response")
	}

	// Start a second agent to test cross-dc queries
	dir2, s2 := testServerWithConfig(t, func(c *Config) {
		c.SerfLANConfig.MemberlistConfig.SecretKey = keyBytes1
		c.SerfWANConfig.MemberlistConfig.SecretKey = keyBytes1
		c.Datacenter = "dc2"
	})
	defer os.RemoveAll(dir2)
	defer s2.Shutdown()

	// Try to join
	joinWAN(t, s2, s1)

	var out2 structs.KeyringResponses
	req2 := structs.KeyringRequest{
		Operation: structs.KeyringList,
	}
	if err := msgpackrpc.CallWithCodec(codec, "Internal.KeyringOperation", &req2, &out2); err != nil {
		t.Fatalf("err: %v", err)
	}

	// 3 responses (one from each DC LAN, one from WAN) in two-node cluster
	if len(out2.Responses) != 3 {
		t.Fatalf("bad: %#v", out)
	}
	wanResp, lanResp = 0, 0
	for _, resp := range out2.Responses {
		if resp.WAN {
			wanResp++
		} else {
			lanResp++
		}
	}
	if lanResp != 2 || wanResp != 1 {
		t.Fatalf("should have two lan and one wan response")
	}
}

func TestInternal_NodeInfo_FilterACL(t *testing.T) {
	t.Parallel()
	dir, token, srv, codec := testACLFilterServer(t)
	defer os.RemoveAll(dir)
	defer srv.Shutdown()
	defer codec.Close()

	opt := structs.NodeSpecificRequest{
		Datacenter:   "dc1",
		Node:         srv.config.NodeName,
		QueryOptions: structs.QueryOptions{Token: token},
	}
	reply := structs.IndexedNodeDump{}
	if err := msgpackrpc.CallWithCodec(codec, "Health.NodeChecks", &opt, &reply); err != nil {
		t.Fatalf("err: %s", err)
	}
	for _, info := range reply.Dump {
		found := false
		for _, chk := range info.Checks {
			if chk.ServiceName == "foo" {
				found = true
			}
			if chk.ServiceName == "bar" {
				t.Fatalf("bad: %#v", info.Checks)
			}
		}
		if !found {
			t.Fatalf("bad: %#v", info.Checks)
		}

		found = false
		for _, svc := range info.Services {
			if svc.Service == "foo" {
				found = true
			}
			if svc.Service == "bar" {
				t.Fatalf("bad: %#v", info.Services)
			}
		}
		if !found {
			t.Fatalf("bad: %#v", info.Services)
		}
	}

	// We've already proven that we call the ACL filtering function so we
	// test node filtering down in acl.go for node cases. This also proves
	// that we respect the version 8 ACL flag, since the test server sets
	// that to false (the regression value of *not* changing this is better
	// for now until we change the sense of the version 8 ACL flag).
}

func TestInternal_NodeDump_FilterACL(t *testing.T) {
	t.Parallel()
	dir, token, srv, codec := testACLFilterServer(t)
	defer os.RemoveAll(dir)
	defer srv.Shutdown()
	defer codec.Close()

	opt := structs.DCSpecificRequest{
		Datacenter:   "dc1",
		QueryOptions: structs.QueryOptions{Token: token},
	}
	reply := structs.IndexedNodeDump{}
	if err := msgpackrpc.CallWithCodec(codec, "Health.NodeChecks", &opt, &reply); err != nil {
		t.Fatalf("err: %s", err)
	}
	for _, info := range reply.Dump {
		found := false
		for _, chk := range info.Checks {
			if chk.ServiceName == "foo" {
				found = true
			}
			if chk.ServiceName == "bar" {
				t.Fatalf("bad: %#v", info.Checks)
			}
		}
		if !found {
			t.Fatalf("bad: %#v", info.Checks)
		}

		found = false
		for _, svc := range info.Services {
			if svc.Service == "foo" {
				found = true
			}
			if svc.Service == "bar" {
				t.Fatalf("bad: %#v", info.Services)
			}
		}
		if !found {
			t.Fatalf("bad: %#v", info.Services)
		}
	}

	// We've already proven that we call the ACL filtering function so we
	// test node filtering down in acl.go for node cases. This also proves
	// that we respect the version 8 ACL flag, since the test server sets
	// that to false (the regression value of *not* changing this is better
	// for now until we change the sense of the version 8 ACL flag).
}

func TestInternal_EventFire_Token(t *testing.T) {
	t.Parallel()
	dir, srv := testServerWithConfig(t, func(c *Config) {
		c.ACLDatacenter = "dc1"
		c.ACLsEnabled = true
		c.ACLMasterToken = "root"
		c.ACLDownPolicy = "deny"
		c.ACLDefaultPolicy = "deny"
	})
	defer os.RemoveAll(dir)
	defer srv.Shutdown()

	codec := rpcClient(t, srv)
	defer codec.Close()

	testrpc.WaitForLeader(t, srv.RPC, "dc1")

	// No token is rejected
	event := structs.EventFireRequest{
		Name:       "foo",
		Datacenter: "dc1",
		Payload:    []byte("nope"),
	}
	err := msgpackrpc.CallWithCodec(codec, "Internal.EventFire", &event, nil)
	if !acl.IsErrPermissionDenied(err) {
		t.Fatalf("bad: %s", err)
	}

	// Root token is allowed to fire
	event.Token = "root"
	err = msgpackrpc.CallWithCodec(codec, "Internal.EventFire", &event, nil)
	if err != nil {
		t.Fatalf("err: %s", err)
	}
}

func TestInternal_ServiceDump(t *testing.T) {
	t.Parallel()
	dir1, s1 := testServer(t)
	defer os.RemoveAll(dir1)
	defer s1.Shutdown()
	codec := rpcClient(t, s1)
	defer codec.Close()

	testrpc.WaitForLeader(t, s1.RPC, "dc1")

	// prep the cluster with some data we can use in our filters
	registerTestCatalogEntries(t, codec)

	doRequest := func(t *testing.T, filter string) structs.CheckServiceNodes {
		t.Helper()
		args := structs.DCSpecificRequest{
			Datacenter:   "dc1",
			QueryOptions: structs.QueryOptions{Filter: filter},
		}

		var out structs.IndexedCheckServiceNodes
		require.NoError(t, msgpackrpc.CallWithCodec(codec, "Internal.ServiceDump", &args, &out))
		return out.Nodes
	}

	// Run the tests against the test server
	t.Run("No Filter", func(t *testing.T) {
		nodes := doRequest(t, "")
		// redis (3), web (3), critical (1), warning (1) and consul (1)
		require.Len(t, nodes, 9)
	})

	t.Run("Filter Node foo and service version 1", func(t *testing.T) {
		nodes := doRequest(t, "Node.Node == foo and Service.Meta.version == 1")
		require.Len(t, nodes, 1)
		require.Equal(t, "redis", nodes[0].Service.Service)
		require.Equal(t, "redisV1", nodes[0].Service.ID)
	})

	t.Run("Filter service web", func(t *testing.T) {
		nodes := doRequest(t, "Service.Service == web")
		require.Len(t, nodes, 3)
	})
}

func TestInternal_ServiceDump_Kind(t *testing.T) {
	t.Parallel()
	dir1, s1 := testServer(t)
	defer os.RemoveAll(dir1)
	defer s1.Shutdown()
	codec := rpcClient(t, s1)
	defer codec.Close()

	testrpc.WaitForLeader(t, s1.RPC, "dc1")

	// prep the cluster with some data we can use in our filters
	registerTestCatalogEntries(t, codec)
	registerTestCatalogEntriesMeshGateway(t, codec)

	doRequest := func(t *testing.T, kind structs.ServiceKind) structs.CheckServiceNodes {
		t.Helper()
		args := structs.ServiceDumpRequest{
			Datacenter:     "dc1",
			ServiceKind:    kind,
			UseServiceKind: true,
		}

		var out structs.IndexedCheckServiceNodes
		require.NoError(t, msgpackrpc.CallWithCodec(codec, "Internal.ServiceDump", &args, &out))
		return out.Nodes
	}

	// Run the tests against the test server
	t.Run("Typical", func(t *testing.T) {
		nodes := doRequest(t, structs.ServiceKindTypical)
		// redis (3), web (3), critical (1), warning (1) and consul (1)
		require.Len(t, nodes, 9)
	})

	t.Run("Mesh Gateway", func(t *testing.T) {
		nodes := doRequest(t, structs.ServiceKindMeshGateway)
		require.Len(t, nodes, 1)
		require.Equal(t, "mg-gw", nodes[0].Service.Service)
		require.Equal(t, "mg-gw-01", nodes[0].Service.ID)
	})

	t.Run("Connect Proxy", func(t *testing.T) {
		nodes := doRequest(t, structs.ServiceKindConnectProxy)
		require.Len(t, nodes, 1)
		require.Equal(t, "web-proxy", nodes[0].Service.Service)
		require.Equal(t, "web-proxy", nodes[0].Service.ID)
	})
}