package agent

import (
	"fmt"
	"net/http"
	"net/http/httptest"
	"net/url"
	"testing"
	"time"

	"github.com/hashicorp/consul/agent/structs"
	"github.com/hashicorp/consul/sdk/testutil/retry"
	"github.com/hashicorp/consul/testrpc"
	"github.com/hashicorp/serf/coordinate"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestCatalogRegister_Service_InvalidAddress(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	for _, addr := range []string{"0.0.0.0", "::", "[::]"} {
		t.Run("addr "+addr, func(t *testing.T) {
			args := &structs.RegisterRequest{
				Node:    "foo",
				Address: "127.0.0.1",
				Service: &structs.NodeService{
					Service: "test",
					Address: addr,
					Port:    8080,
				},
			}
			req, _ := http.NewRequest("PUT", "/v1/catalog/register", jsonReader(args))
			_, err := a.srv.CatalogRegister(nil, req)
			if err == nil || err.Error() != "Invalid service address" {
				t.Fatalf("err: %v", err)
			}
		})
	}
}

func TestCatalogDeregister(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	// Register node
	args := &structs.DeregisterRequest{Node: "foo"}
	req, _ := http.NewRequest("PUT", "/v1/catalog/deregister", jsonReader(args))
	obj, err := a.srv.CatalogDeregister(nil, req)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	res := obj.(bool)
	if res != true {
		t.Fatalf("bad: %v", res)
	}
}

func TestCatalogDatacenters(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	retry.Run(t, func(r *retry.R) {
		req, _ := http.NewRequest("GET", "/v1/catalog/datacenters", nil)
		obj, err := a.srv.CatalogDatacenters(nil, req)
		if err != nil {
			r.Fatal(err)
		}

		dcs := obj.([]string)
		if got, want := len(dcs), 1; got != want {
			r.Fatalf("got %d data centers want %d", got, want)
		}
	})
}

func TestCatalogNodes(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	// Register node
	args := &structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
	}

	var out struct{}
	if err := a.RPC("Catalog.Register", args, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	req, _ := http.NewRequest("GET", "/v1/catalog/nodes?dc=dc1", nil)
	resp := httptest.NewRecorder()
	obj, err := a.srv.CatalogNodes(resp, req)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	// Verify an index is set
	assertIndex(t, resp)

	nodes := obj.(structs.Nodes)
	if len(nodes) != 2 {
		t.Fatalf("bad: %v ; nodes:=%v", obj, nodes)
	}
}

func TestCatalogNodes_MetaFilter(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	// Register a node with a meta field
	args := &structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
		NodeMeta: map[string]string{
			"somekey": "somevalue",
		},
	}

	var out struct{}
	if err := a.RPC("Catalog.Register", args, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	req, _ := http.NewRequest("GET", "/v1/catalog/nodes?node-meta=somekey:somevalue", nil)
	resp := httptest.NewRecorder()
	obj, err := a.srv.CatalogNodes(resp, req)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	// Verify an index is set
	assertIndex(t, resp)

	// Verify we only get the node with the correct meta field back
	nodes := obj.(structs.Nodes)
	if len(nodes) != 1 {
		t.Fatalf("bad: %v", obj)
	}
	if v, ok := nodes[0].Meta["somekey"]; !ok || v != "somevalue" {
		t.Fatalf("bad: %v", nodes[0].Meta)
	}
}

func TestCatalogNodes_Filter(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	// Register a node with a meta field
	args := &structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
		NodeMeta: map[string]string{
			"somekey": "somevalue",
		},
	}

	var out struct{}
	require.NoError(t, a.RPC("Catalog.Register", args, &out))

	req, _ := http.NewRequest("GET", "/v1/catalog/nodes?filter="+url.QueryEscape("Meta.somekey == somevalue"), nil)
	resp := httptest.NewRecorder()
	obj, err := a.srv.CatalogNodes(resp, req)
	require.NoError(t, err)

	// Verify an index is set
	assertIndex(t, resp)

	// Verify we only get the node with the correct meta field back
	nodes := obj.(structs.Nodes)
	require.Len(t, nodes, 1)

	v, ok := nodes[0].Meta["somekey"]
	require.True(t, ok)
	require.Equal(t, v, "somevalue")
}

func TestCatalogNodes_WanTranslation(t *testing.T) {
	t.Parallel()
	a1 := NewTestAgent(t, t.Name(), `
		datacenter = "dc1"
		translate_wan_addrs = true
		acl_datacenter = ""
	`)
	defer a1.Shutdown()
	testrpc.WaitForTestAgent(t, a1.RPC, "dc1")

	a2 := NewTestAgent(t, t.Name(), `
		datacenter = "dc2"
		translate_wan_addrs = true
		acl_datacenter = ""
	`)
	defer a2.Shutdown()
	testrpc.WaitForTestAgent(t, a2.RPC, "dc2")

	// Wait for the WAN join.
	addr := fmt.Sprintf("127.0.0.1:%d", a1.Config.SerfPortWAN)
	if _, err := a2.JoinWAN([]string{addr}); err != nil {
		t.Fatalf("err: %v", err)
	}
	testrpc.WaitForLeader(t, a1.RPC, "dc1")
	testrpc.WaitForLeader(t, a2.RPC, "dc2")
	retry.Run(t, func(r *retry.R) {
		if got, want := len(a1.WANMembers()), 2; got < want {
			r.Fatalf("got %d WAN members want at least %d", got, want)
		}
	})

	// Register a node with DC2.
	{
		args := &structs.RegisterRequest{
			Datacenter: "dc2",
			Node:       "wan_translation_test",
			Address:    "127.0.0.1",
			TaggedAddresses: map[string]string{
				"wan": "127.0.0.2",
			},
			Service: &structs.NodeService{
				Service: "http_wan_translation_test",
			},
		}

		var out struct{}
		if err := a2.RPC("Catalog.Register", args, &out); err != nil {
			t.Fatalf("err: %v", err)
		}
	}

	// Query nodes in DC2 from DC1.
	req, _ := http.NewRequest("GET", "/v1/catalog/nodes?dc=dc2", nil)
	resp1 := httptest.NewRecorder()
	obj1, err1 := a1.srv.CatalogNodes(resp1, req)
	if err1 != nil {
		t.Fatalf("err: %v", err1)
	}
	assertIndex(t, resp1)

	// Expect that DC1 gives us a WAN address (since the node is in DC2).
	nodes1 := obj1.(structs.Nodes)
	if len(nodes1) != 2 {
		t.Fatalf("bad: %v, nodes:=%v", obj1, nodes1)
	}
	var address string
	for _, node := range nodes1 {
		if node.Node == "wan_translation_test" {
			address = node.Address
		}
	}
	if address != "127.0.0.2" {
		t.Fatalf("bad: %s", address)
	}

	// Query DC2 from DC2.
	resp2 := httptest.NewRecorder()
	obj2, err2 := a2.srv.CatalogNodes(resp2, req)
	if err2 != nil {
		t.Fatalf("err: %v", err2)
	}
	assertIndex(t, resp2)

	// Expect that DC2 gives us a private address (since the node is in DC2).
	nodes2 := obj2.(structs.Nodes)
	if len(nodes2) != 2 {
		t.Fatalf("bad: %v", obj2)
	}
	for _, node := range nodes2 {
		if node.Node == "wan_translation_test" {
			address = node.Address
		}
	}
	if address != "127.0.0.1" {
		t.Fatalf("bad: %s", address)
	}
}

func TestCatalogNodes_Blocking(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	// Register node
	args := &structs.DCSpecificRequest{
		Datacenter: "dc1",
	}

	var out structs.IndexedNodes
	if err := a.RPC("Catalog.ListNodes", *args, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	// t.Fatal must be called from the main go routine
	// of the test. Because of this we cannot call
	// t.Fatal from within the go routines and use
	// an error channel instead.
	errch := make(chan error, 2)
	go func() {
		testrpc.WaitForTestAgent(t, a.RPC, "dc1")
		start := time.Now()

		// register a service after the blocking call
		// in order to unblock it.
		time.AfterFunc(100*time.Millisecond, func() {
			args := &structs.RegisterRequest{
				Datacenter: "dc1",
				Node:       "foo",
				Address:    "127.0.0.1",
			}
			var out struct{}
			errch <- a.RPC("Catalog.Register", args, &out)
		})

		// now block
		req, _ := http.NewRequest("GET", fmt.Sprintf("/v1/catalog/nodes?wait=3s&index=%d", out.Index+1), nil)
		resp := httptest.NewRecorder()
		obj, err := a.srv.CatalogNodes(resp, req)
		if err != nil {
			errch <- err
		}

		// Should block for a while
		if d := time.Since(start); d < 50*time.Millisecond {
			errch <- fmt.Errorf("too fast: %v", d)
		}

		if idx := getIndex(t, resp); idx <= out.Index {
			errch <- fmt.Errorf("bad: %v", idx)
		}

		nodes := obj.(structs.Nodes)
		if len(nodes) != 2 {
			errch <- fmt.Errorf("bad: %v", obj)
		}
		errch <- nil
	}()

	// wait for both go routines to return
	if err := <-errch; err != nil {
		t.Fatal(err)
	}
	if err := <-errch; err != nil {
		t.Fatal(err)
	}
}

func TestCatalogNodes_DistanceSort(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	// Register nodes.
	args := &structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
	}
	var out struct{}
	if err := a.RPC("Catalog.Register", args, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	args = &structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "bar",
		Address:    "127.0.0.2",
	}
	if err := a.RPC("Catalog.Register", args, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Nobody has coordinates set so this will still return them in the
	// order they are indexed.
	req, _ := http.NewRequest("GET", "/v1/catalog/nodes?dc=dc1&near=foo", nil)
	resp := httptest.NewRecorder()
	obj, err := a.srv.CatalogNodes(resp, req)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	assertIndex(t, resp)
	nodes := obj.(structs.Nodes)
	if len(nodes) != 3 {
		t.Fatalf("bad: %v", obj)
	}
	if nodes[0].Node != "bar" {
		t.Fatalf("bad: %v", nodes)
	}
	if nodes[1].Node != "foo" {
		t.Fatalf("bad: %v", nodes)
	}
	if nodes[2].Node != a.Config.NodeName {
		t.Fatalf("bad: %v", nodes)
	}

	// Send an update for the node and wait for it to get applied.
	arg := structs.CoordinateUpdateRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Coord:      coordinate.NewCoordinate(coordinate.DefaultConfig()),
	}
	if err := a.RPC("Coordinate.Update", &arg, &out); err != nil {
		t.Fatalf("err: %v", err)
	}
	time.Sleep(300 * time.Millisecond)

	// Query again and now foo should have moved to the front of the line.
	req, _ = http.NewRequest("GET", "/v1/catalog/nodes?dc=dc1&near=foo", nil)
	resp = httptest.NewRecorder()
	obj, err = a.srv.CatalogNodes(resp, req)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	assertIndex(t, resp)
	nodes = obj.(structs.Nodes)
	if len(nodes) != 3 {
		t.Fatalf("bad: %v", obj)
	}
	if nodes[0].Node != "foo" {
		t.Fatalf("bad: %v", nodes)
	}
	if nodes[1].Node != "bar" {
		t.Fatalf("bad: %v", nodes)
	}
	if nodes[2].Node != a.Config.NodeName {
		t.Fatalf("bad: %v", nodes)
	}
}

func TestCatalogServices(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	// Register node
	args := &structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
		Service: &structs.NodeService{
			Service: "api",
		},
	}

	var out struct{}
	if err := a.RPC("Catalog.Register", args, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	req, _ := http.NewRequest("GET", "/v1/catalog/services?dc=dc1", nil)
	resp := httptest.NewRecorder()
	obj, err := a.srv.CatalogServices(resp, req)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	assertIndex(t, resp)

	services := obj.(structs.Services)
	if len(services) != 2 {
		t.Fatalf("bad: %v", obj)
	}
}

func TestCatalogServices_NodeMetaFilter(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	// Register node
	args := &structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
		NodeMeta: map[string]string{
			"somekey": "somevalue",
		},
		Service: &structs.NodeService{
			Service: "api",
		},
	}

	var out struct{}
	if err := a.RPC("Catalog.Register", args, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	req, _ := http.NewRequest("GET", "/v1/catalog/services?node-meta=somekey:somevalue", nil)
	resp := httptest.NewRecorder()
	obj, err := a.srv.CatalogServices(resp, req)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	assertIndex(t, resp)

	services := obj.(structs.Services)
	if len(services) != 1 {
		t.Fatalf("bad: %v", obj)
	}
	if _, ok := services[args.Service.Service]; !ok {
		t.Fatalf("bad: %v", services)
	}
}

func TestCatalogRegister_checkRegistration(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	// Register node with a service and check
	check := structs.HealthCheck{
		Node:      "foo",
		CheckID:   "foo-check",
		Name:      "foo check",
		ServiceID: "api",
		Definition: structs.HealthCheckDefinition{
			TCP:      "localhost:8888",
			Interval: 5 * time.Second,
		},
	}

	args := &structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
		Service: &structs.NodeService{
			Service: "api",
		},
		Check: &check,
	}

	var out struct{}
	if err := a.RPC("Catalog.Register", args, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	retry.Run(t, func(r *retry.R) {
		req, _ := http.NewRequest("GET", "/v1/health/checks/api", nil)
		resp := httptest.NewRecorder()
		obj, err := a.srv.HealthServiceChecks(resp, req)
		if err != nil {
			r.Fatalf("err: %v", err)
		}

		checks := obj.(structs.HealthChecks)
		if len(checks) != 1 {
			r.Fatalf("expected 1 check, got: %d", len(checks))
		}
		if checks[0].CheckID != check.CheckID {
			r.Fatalf("expected check id %s, got %s", check.Type, checks[0].Type)
		}
		if checks[0].Type != "tcp" {
			r.Fatalf("expected check type tcp, got %s", checks[0].Type)
		}
	})
}

func TestCatalogServiceNodes(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	assert := assert.New(t)
	require := require.New(t)

	// Make sure an empty list is returned, not a nil
	{
		req, _ := http.NewRequest("GET", "/v1/catalog/service/api?tag=a", nil)
		resp := httptest.NewRecorder()
		obj, err := a.srv.CatalogServiceNodes(resp, req)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		assertIndex(t, resp)

		nodes := obj.(structs.ServiceNodes)
		if nodes == nil || len(nodes) != 0 {
			t.Fatalf("bad: %v", obj)
		}
	}

	// Register node
	args := &structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
		Service: &structs.NodeService{
			Service: "api",
			Tags:    []string{"a"},
		},
	}

	var out struct{}
	if err := a.RPC("Catalog.Register", args, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	req, _ := http.NewRequest("GET", "/v1/catalog/service/api?tag=a", nil)
	resp := httptest.NewRecorder()
	obj, err := a.srv.CatalogServiceNodes(resp, req)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	assertIndex(t, resp)

	nodes := obj.(structs.ServiceNodes)
	if len(nodes) != 1 {
		t.Fatalf("bad: %v", obj)
	}

	// Test caching
	{
		// List instances with cache enabled
		req, _ := http.NewRequest("GET", "/v1/catalog/service/api?cached", nil)
		resp := httptest.NewRecorder()
		obj, err := a.srv.CatalogServiceNodes(resp, req)
		require.NoError(err)
		nodes := obj.(structs.ServiceNodes)
		assert.Len(nodes, 1)

		// Should be a cache miss
		assert.Equal("MISS", resp.Header().Get("X-Cache"))
	}

	{
		// List instances with cache enabled
		req, _ := http.NewRequest("GET", "/v1/catalog/service/api?cached", nil)
		resp := httptest.NewRecorder()
		obj, err := a.srv.CatalogServiceNodes(resp, req)
		require.NoError(err)
		nodes := obj.(structs.ServiceNodes)
		assert.Len(nodes, 1)

		// Should be a cache HIT now!
		assert.Equal("HIT", resp.Header().Get("X-Cache"))
		assert.Equal("0", resp.Header().Get("Age"))
	}

	// Ensure background refresh works
	{
		// Register a new instance of the service
		args2 := args
		args2.Node = "bar"
		args2.Address = "127.0.0.2"
		require.NoError(a.RPC("Catalog.Register", args, &out))

		retry.Run(t, func(r *retry.R) {
			// List it again
			req, _ := http.NewRequest("GET", "/v1/catalog/service/api?cached", nil)
			resp := httptest.NewRecorder()
			obj, err := a.srv.CatalogServiceNodes(resp, req)
			r.Check(err)

			nodes := obj.(structs.ServiceNodes)
			if len(nodes) != 2 {
				r.Fatalf("Want 2 nodes")
			}

			// Should be a cache hit! The data should've updated in the cache
			// in the background so this should've been fetched directly from
			// the cache.
			if resp.Header().Get("X-Cache") != "HIT" {
				r.Fatalf("should be a cache hit")
			}
		})
	}
}

func TestCatalogServiceNodes_NodeMetaFilter(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	// Make sure an empty list is returned, not a nil
	{
		req, _ := http.NewRequest("GET", "/v1/catalog/service/api?node-meta=somekey:somevalue", nil)
		resp := httptest.NewRecorder()
		obj, err := a.srv.CatalogServiceNodes(resp, req)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		assertIndex(t, resp)

		nodes := obj.(structs.ServiceNodes)
		if nodes == nil || len(nodes) != 0 {
			t.Fatalf("bad: %v", obj)
		}
	}

	// Register node
	args := &structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
		NodeMeta: map[string]string{
			"somekey": "somevalue",
		},
		Service: &structs.NodeService{
			Service: "api",
		},
	}

	var out struct{}
	if err := a.RPC("Catalog.Register", args, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	req, _ := http.NewRequest("GET", "/v1/catalog/service/api?node-meta=somekey:somevalue", nil)
	resp := httptest.NewRecorder()
	obj, err := a.srv.CatalogServiceNodes(resp, req)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	assertIndex(t, resp)

	nodes := obj.(structs.ServiceNodes)
	if len(nodes) != 1 {
		t.Fatalf("bad: %v", obj)
	}
}

func TestCatalogServiceNodes_Filter(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()

	queryPath := "/v1/catalog/service/api?filter=" + url.QueryEscape("ServiceMeta.somekey == somevalue")

	// Make sure an empty list is returned, not a nil
	{
		req, _ := http.NewRequest("GET", queryPath, nil)
		resp := httptest.NewRecorder()
		obj, err := a.srv.CatalogServiceNodes(resp, req)
		require.NoError(t, err)

		assertIndex(t, resp)

		nodes := obj.(structs.ServiceNodes)
		require.Empty(t, nodes)
	}

	// Register node
	args := &structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
		Service: &structs.NodeService{
			Service: "api",
			Meta: map[string]string{
				"somekey": "somevalue",
			},
		},
	}

	var out struct{}
	require.NoError(t, a.RPC("Catalog.Register", args, &out))

	// Register a second service for the node
	args = &structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
		Service: &structs.NodeService{
			ID:      "api2",
			Service: "api",
			Meta: map[string]string{
				"somekey": "notvalue",
			},
		},
		SkipNodeUpdate: true,
	}

	require.NoError(t, a.RPC("Catalog.Register", args, &out))

	req, _ := http.NewRequest("GET", queryPath, nil)
	resp := httptest.NewRecorder()
	obj, err := a.srv.CatalogServiceNodes(resp, req)
	require.NoError(t, err)
	assertIndex(t, resp)

	nodes := obj.(structs.ServiceNodes)
	require.Len(t, nodes, 1)
}

func TestCatalogServiceNodes_WanTranslation(t *testing.T) {
	t.Parallel()
	a1 := NewTestAgent(t, t.Name(), `
		datacenter = "dc1"
		translate_wan_addrs = true
		acl_datacenter = ""
	`)
	defer a1.Shutdown()

	a2 := NewTestAgent(t, t.Name(), `
		datacenter = "dc2"
		translate_wan_addrs = true
		acl_datacenter = ""
	`)
	defer a2.Shutdown()

	// Wait for the WAN join.
	addr := fmt.Sprintf("127.0.0.1:%d", a1.Config.SerfPortWAN)
	_, err := a2.srv.agent.JoinWAN([]string{addr})
	require.NoError(t, err)
	retry.Run(t, func(r *retry.R) {
		require.Len(r, a1.WANMembers(), 2)
	})

	// Register a node with DC2.
	{
		args := &structs.RegisterRequest{
			Datacenter: "dc2",
			Node:       "foo",
			Address:    "127.0.0.1",
			TaggedAddresses: map[string]string{
				"wan": "127.0.0.2",
			},
			Service: &structs.NodeService{
				Service: "http_wan_translation_test",
				Address: "127.0.0.1",
				Port:    8080,
				TaggedAddresses: map[string]structs.ServiceAddress{
					"wan": structs.ServiceAddress{
						Address: "1.2.3.4",
						Port:    80,
					},
				},
			},
		}

		var out struct{}
		require.NoError(t, a2.RPC("Catalog.Register", args, &out))
	}

	// Query for the node in DC2 from DC1.
	req, _ := http.NewRequest("GET", "/v1/catalog/service/http_wan_translation_test?dc=dc2", nil)
	resp1 := httptest.NewRecorder()
	obj1, err1 := a1.srv.CatalogServiceNodes(resp1, req)
	require.NoError(t, err1)
	require.NoError(t, checkIndex(resp1))

	// Expect that DC1 gives us a WAN address (since the node is in DC2).
	nodes1, ok := obj1.(structs.ServiceNodes)
	require.True(t, ok, "obj1 is not a structs.ServiceNodes")
	require.Len(t, nodes1, 1)
	node1 := nodes1[0]
	require.Equal(t, node1.Address, "127.0.0.2")
	require.Equal(t, node1.ServiceAddress, "1.2.3.4")
	require.Equal(t, node1.ServicePort, 80)

	// Query DC2 from DC2.
	resp2 := httptest.NewRecorder()
	obj2, err2 := a2.srv.CatalogServiceNodes(resp2, req)
	require.NoError(t, err2)
	require.NoError(t, checkIndex(resp2))

	// Expect that DC2 gives us a local address (since the node is in DC2).
	nodes2, ok := obj2.(structs.ServiceNodes)
	require.True(t, ok, "obj2 is not a structs.ServiceNodes")
	require.Len(t, nodes2, 1)
	node2 := nodes2[0]
	require.Equal(t, node2.Address, "127.0.0.1")
	require.Equal(t, node2.ServiceAddress, "127.0.0.1")
	require.Equal(t, node2.ServicePort, 8080)
}

func TestCatalogServiceNodes_DistanceSort(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForLeader(t, a.RPC, "dc1")

	// Register nodes.
	args := &structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "bar",
		Address:    "127.0.0.1",
		Service: &structs.NodeService{
			Service: "api",
			Tags:    []string{"a"},
		},
	}
	var out struct{}
	if err := a.RPC("Catalog.Register", args, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	req, _ := http.NewRequest("GET", "/v1/catalog/service/api?tag=a", nil)
	args = &structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.2",
		Service: &structs.NodeService{
			Service: "api",
			Tags:    []string{"a"},
		},
	}
	if err := a.RPC("Catalog.Register", args, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Nobody has coordinates set so this will still return them in the
	// order they are indexed.
	req, _ = http.NewRequest("GET", "/v1/catalog/service/api?tag=a&near=foo", nil)
	resp := httptest.NewRecorder()
	obj, err := a.srv.CatalogServiceNodes(resp, req)
	if err != nil {
		t.Fatalf("err: %v", err)
	}

	assertIndex(t, resp)
	nodes := obj.(structs.ServiceNodes)
	if len(nodes) != 2 {
		t.Fatalf("bad: %v", obj)
	}
	if nodes[0].Node != "bar" {
		t.Fatalf("bad: %v", nodes)
	}
	if nodes[1].Node != "foo" {
		t.Fatalf("bad: %v", nodes)
	}

	// Send an update for the node and wait for it to get applied.
	arg := structs.CoordinateUpdateRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Coord:      coordinate.NewCoordinate(coordinate.DefaultConfig()),
	}
	if err := a.RPC("Coordinate.Update", &arg, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Eventually foo should move to the front of the line.
	retry.Run(t, func(r *retry.R) {
		req, _ = http.NewRequest("GET", "/v1/catalog/service/api?tag=a&near=foo", nil)
		resp = httptest.NewRecorder()
		obj, err = a.srv.CatalogServiceNodes(resp, req)
		if err != nil {
			r.Fatalf("err: %v", err)
		}

		assertIndex(t, resp)
		nodes = obj.(structs.ServiceNodes)
		if len(nodes) != 2 {
			r.Fatalf("bad: %v", obj)
		}
		if nodes[0].Node != "foo" {
			r.Fatalf("bad: %v", nodes)
		}
		if nodes[1].Node != "bar" {
			r.Fatalf("bad: %v", nodes)
		}
	})
}

// Test that connect proxies can be queried via /v1/catalog/service/:service
// directly and that their results contain the proxy fields.
func TestCatalogServiceNodes_ConnectProxy(t *testing.T) {
	t.Parallel()

	assert := assert.New(t)
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForLeader(t, a.RPC, "dc1")

	// Register
	args := structs.TestRegisterRequestProxy(t)
	var out struct{}
	assert.Nil(a.RPC("Catalog.Register", args, &out))

	req, _ := http.NewRequest("GET", fmt.Sprintf(
		"/v1/catalog/service/%s", args.Service.Service), nil)
	resp := httptest.NewRecorder()
	obj, err := a.srv.CatalogServiceNodes(resp, req)
	assert.Nil(err)
	assertIndex(t, resp)

	nodes := obj.(structs.ServiceNodes)
	assert.Len(nodes, 1)
	assert.Equal(structs.ServiceKindConnectProxy, nodes[0].ServiceKind)
	assert.Equal(args.Service.Proxy, nodes[0].ServiceProxy)
}

// Test that the Connect-compatible endpoints can be queried for a
// service via /v1/catalog/connect/:service.
func TestCatalogConnectServiceNodes_good(t *testing.T) {
	t.Parallel()

	assert := assert.New(t)
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForLeader(t, a.RPC, "dc1")

	// Register
	args := structs.TestRegisterRequestProxy(t)
	args.Service.Address = "127.0.0.55"
	var out struct{}
	assert.Nil(a.RPC("Catalog.Register", args, &out))

	req, _ := http.NewRequest("GET", fmt.Sprintf(
		"/v1/catalog/connect/%s", args.Service.Proxy.DestinationServiceName), nil)
	resp := httptest.NewRecorder()
	obj, err := a.srv.CatalogConnectServiceNodes(resp, req)
	assert.Nil(err)
	assertIndex(t, resp)

	nodes := obj.(structs.ServiceNodes)
	assert.Len(nodes, 1)
	assert.Equal(structs.ServiceKindConnectProxy, nodes[0].ServiceKind)
	assert.Equal(args.Service.Address, nodes[0].ServiceAddress)
	assert.Equal(args.Service.Proxy, nodes[0].ServiceProxy)
}

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

	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForLeader(t, a.RPC, "dc1")

	// Register
	args := structs.TestRegisterRequestProxy(t)
	args.Service.Address = "127.0.0.55"
	var out struct{}
	require.NoError(t, a.RPC("Catalog.Register", args, &out))

	args = structs.TestRegisterRequestProxy(t)
	args.Service.Address = "127.0.0.55"
	args.Service.Meta = map[string]string{
		"version": "2",
	}
	args.Service.ID = "web-proxy2"
	args.SkipNodeUpdate = true
	require.NoError(t, a.RPC("Catalog.Register", args, &out))

	req, _ := http.NewRequest("GET", fmt.Sprintf(
		"/v1/catalog/connect/%s?filter=%s",
		args.Service.Proxy.DestinationServiceName,
		url.QueryEscape("ServiceMeta.version == 2")), nil)
	resp := httptest.NewRecorder()
	obj, err := a.srv.CatalogConnectServiceNodes(resp, req)
	require.NoError(t, err)
	assertIndex(t, resp)

	nodes := obj.(structs.ServiceNodes)
	require.Len(t, nodes, 1)
	require.Equal(t, structs.ServiceKindConnectProxy, nodes[0].ServiceKind)
	require.Equal(t, args.Service.Address, nodes[0].ServiceAddress)
	require.Equal(t, args.Service.Proxy, nodes[0].ServiceProxy)
}

func TestCatalogNodeServices(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	// Register node with a regular service and connect proxy
	args := &structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
		Service: &structs.NodeService{
			Service: "api",
			Tags:    []string{"a"},
		},
	}

	var out struct{}
	if err := a.RPC("Catalog.Register", args, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Register a connect proxy
	args.Service = structs.TestNodeServiceProxy(t)
	require.NoError(t, a.RPC("Catalog.Register", args, &out))

	req, _ := http.NewRequest("GET", "/v1/catalog/node/foo?dc=dc1", nil)
	resp := httptest.NewRecorder()
	obj, err := a.srv.CatalogNodeServices(resp, req)
	if err != nil {
		t.Fatalf("err: %v", err)
	}
	assertIndex(t, resp)

	services := obj.(*structs.NodeServices)
	if len(services.Services) != 2 {
		t.Fatalf("bad: %v", obj)
	}

	// Proxy service should have it's config intact
	require.Equal(t, args.Service.Proxy, services.Services["web-proxy"].Proxy)
}

func TestCatalogNodeServices_Filter(t *testing.T) {
	t.Parallel()
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	// Register node with a regular service and connect proxy
	args := &structs.RegisterRequest{
		Datacenter: "dc1",
		Node:       "foo",
		Address:    "127.0.0.1",
		Service: &structs.NodeService{
			Service: "api",
			Tags:    []string{"a"},
		},
	}

	var out struct{}
	require.NoError(t, a.RPC("Catalog.Register", args, &out))

	// Register a connect proxy
	args.Service = structs.TestNodeServiceProxy(t)
	require.NoError(t, a.RPC("Catalog.Register", args, &out))

	req, _ := http.NewRequest("GET", "/v1/catalog/node/foo?dc=dc1&filter="+url.QueryEscape("Kind == `connect-proxy`"), nil)
	resp := httptest.NewRecorder()
	obj, err := a.srv.CatalogNodeServices(resp, req)
	require.NoError(t, err)
	assertIndex(t, resp)

	services := obj.(*structs.NodeServices)
	require.Len(t, services.Services, 1)

	// Proxy service should have it's config intact
	require.Equal(t, args.Service.Proxy, services.Services["web-proxy"].Proxy)
}

// Test that the services on a node contain all the Connect proxies on
// the node as well with their fields properly populated.
func TestCatalogNodeServices_ConnectProxy(t *testing.T) {
	t.Parallel()

	assert := assert.New(t)
	a := NewTestAgent(t, t.Name(), "")
	defer a.Shutdown()
	testrpc.WaitForTestAgent(t, a.RPC, "dc1")

	// Register
	args := structs.TestRegisterRequestProxy(t)
	var out struct{}
	assert.Nil(a.RPC("Catalog.Register", args, &out))

	req, _ := http.NewRequest("GET", fmt.Sprintf(
		"/v1/catalog/node/%s", args.Node), nil)
	resp := httptest.NewRecorder()
	obj, err := a.srv.CatalogNodeServices(resp, req)
	assert.Nil(err)
	assertIndex(t, resp)

	ns := obj.(*structs.NodeServices)
	assert.Len(ns.Services, 1)
	v := ns.Services[args.Service.Service]
	assert.Equal(structs.ServiceKindConnectProxy, v.Kind)
}

func TestCatalogNodeServices_WanTranslation(t *testing.T) {
	t.Parallel()
	a1 := NewTestAgent(t, t.Name(), `
		datacenter = "dc1"
		translate_wan_addrs = true
		acl_datacenter = ""
	`)
	defer a1.Shutdown()
	testrpc.WaitForTestAgent(t, a1.RPC, "dc1")

	a2 := NewTestAgent(t, t.Name(), `
		datacenter = "dc2"
		translate_wan_addrs = true
		acl_datacenter = ""
	`)
	defer a2.Shutdown()
	testrpc.WaitForTestAgent(t, a2.RPC, "dc2")

	// Wait for the WAN join.
	addr := fmt.Sprintf("127.0.0.1:%d", a1.Config.SerfPortWAN)
	_, err := a2.srv.agent.JoinWAN([]string{addr})
	require.NoError(t, err)
	retry.Run(t, func(r *retry.R) {
		require.Len(r, a1.WANMembers(), 2)
	})

	// Register a node with DC2.
	{
		args := &structs.RegisterRequest{
			Datacenter: "dc2",
			Node:       "foo",
			Address:    "127.0.0.1",
			TaggedAddresses: map[string]string{
				"wan": "127.0.0.2",
			},
			Service: &structs.NodeService{
				Service: "http_wan_translation_test",
				Address: "127.0.0.1",
				Port:    8080,
				TaggedAddresses: map[string]structs.ServiceAddress{
					"wan": structs.ServiceAddress{
						Address: "1.2.3.4",
						Port:    80,
					},
				},
			},
		}

		var out struct{}
		require.NoError(t, a2.RPC("Catalog.Register", args, &out))
	}

	// Query for the node in DC2 from DC1.
	req, _ := http.NewRequest("GET", "/v1/catalog/node/foo?dc=dc2", nil)
	resp1 := httptest.NewRecorder()
	obj1, err1 := a1.srv.CatalogNodeServices(resp1, req)
	require.NoError(t, err1)
	require.NoError(t, checkIndex(resp1))

	// Expect that DC1 gives us a WAN address (since the node is in DC2).
	service1, ok := obj1.(*structs.NodeServices)
	require.True(t, ok, "obj1 is not a *structs.NodeServices")
	require.NotNil(t, service1.Node)
	require.Equal(t, service1.Node.Address, "127.0.0.2")
	require.Len(t, service1.Services, 1)
	ns1, ok := service1.Services["http_wan_translation_test"]
	require.True(t, ok, "Missing service http_wan_translation_test")
	require.Equal(t, "1.2.3.4", ns1.Address)
	require.Equal(t, 80, ns1.Port)

	// Query DC2 from DC2.
	resp2 := httptest.NewRecorder()
	obj2, err2 := a2.srv.CatalogNodeServices(resp2, req)
	require.NoError(t, err2)
	require.NoError(t, checkIndex(resp2))

	// Expect that DC2 gives us a private address (since the node is in DC2).
	service2 := obj2.(*structs.NodeServices)
	require.True(t, ok, "obj2 is not a *structs.NodeServices")
	require.NotNil(t, service2.Node)
	require.Equal(t, service2.Node.Address, "127.0.0.1")
	require.Len(t, service2.Services, 1)
	ns2, ok := service2.Services["http_wan_translation_test"]
	require.True(t, ok, "Missing service http_wan_translation_test")
	require.Equal(t, ns2.Address, "127.0.0.1")
	require.Equal(t, ns2.Port, 8080)
}