package agent

import (
	"archive/tar"
	"fmt"
	"io"
	"io/ioutil"
	"net/http"
	"net/http/httptest"
	"os"
	"reflect"
	"strconv"
	"strings"
	"testing"

	"github.com/golang/snappy"
	"github.com/hashicorp/nomad/acl"
	"github.com/hashicorp/nomad/ci"
	"github.com/hashicorp/nomad/client/allocdir"
	"github.com/hashicorp/nomad/helper"
	"github.com/hashicorp/nomad/helper/uuid"
	"github.com/hashicorp/nomad/nomad/mock"
	"github.com/hashicorp/nomad/nomad/structs"
	"github.com/hashicorp/nomad/testutil"
	"github.com/stretchr/testify/require"
)

func TestHTTP_AllocsList(t *testing.T) {
	ci.Parallel(t)
	httpTest(t, nil, func(s *TestAgent) {
		// Directly manipulate the state
		state := s.Agent.server.State()
		alloc1 := mock.Alloc()
		testEvent := structs.NewTaskEvent(structs.TaskSiblingFailed)
		var events1 []*structs.TaskEvent
		events1 = append(events1, testEvent)
		taskState := &structs.TaskState{Events: events1}
		alloc1.TaskStates = make(map[string]*structs.TaskState)
		alloc1.TaskStates["test"] = taskState

		alloc2 := mock.Alloc()
		alloc2.TaskStates = make(map[string]*structs.TaskState)
		alloc2.TaskStates["test"] = taskState

		state.UpsertJobSummary(998, mock.JobSummary(alloc1.JobID))
		state.UpsertJobSummary(999, mock.JobSummary(alloc2.JobID))
		err := state.UpsertAllocs(structs.MsgTypeTestSetup, 1000, []*structs.Allocation{alloc1, alloc2})
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		// Make the HTTP request
		req, err := http.NewRequest("GET", "/v1/allocations", nil)
		if err != nil {
			t.Fatalf("err: %v", err)
		}
		respW := httptest.NewRecorder()

		// Make the request
		obj, err := s.Server.AllocsRequest(respW, req)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		// Check for the index
		if respW.Result().Header.Get("X-Nomad-Index") == "" {
			t.Fatalf("missing index")
		}
		if respW.Result().Header.Get("X-Nomad-KnownLeader") != "true" {
			t.Fatalf("missing known leader")
		}
		if respW.Result().Header.Get("X-Nomad-LastContact") == "" {
			t.Fatalf("missing last contact")
		}

		// Check the alloc
		allocs := obj.([]*structs.AllocListStub)
		if len(allocs) != 2 {
			t.Fatalf("bad: %#v", allocs)
		}
		expectedMsg := "Task's sibling failed"
		displayMsg1 := allocs[0].TaskStates["test"].Events[0].DisplayMessage
		require.Equal(t, expectedMsg, displayMsg1, "DisplayMessage should be set")
		displayMsg2 := allocs[0].TaskStates["test"].Events[0].DisplayMessage
		require.Equal(t, expectedMsg, displayMsg2, "DisplayMessage should be set")
	})
}

func TestHTTP_AllocsPrefixList(t *testing.T) {
	ci.Parallel(t)
	httpTest(t, nil, func(s *TestAgent) {
		// Directly manipulate the state
		state := s.Agent.server.State()

		alloc1 := mock.Alloc()
		alloc1.ID = "aaaaaaaa-e8f7-fd38-c855-ab94ceb89706"
		alloc2 := mock.Alloc()
		alloc2.ID = "aaabbbbb-e8f7-fd38-c855-ab94ceb89706"

		testEvent := structs.NewTaskEvent(structs.TaskSiblingFailed)
		var events1 []*structs.TaskEvent
		events1 = append(events1, testEvent)
		taskState := &structs.TaskState{Events: events1}
		alloc2.TaskStates = make(map[string]*structs.TaskState)
		alloc2.TaskStates["test"] = taskState

		summary1 := mock.JobSummary(alloc1.JobID)
		summary2 := mock.JobSummary(alloc2.JobID)
		if err := state.UpsertJobSummary(998, summary1); err != nil {
			t.Fatal(err)
		}
		if err := state.UpsertJobSummary(999, summary2); err != nil {
			t.Fatal(err)
		}
		if err := state.UpsertAllocs(structs.MsgTypeTestSetup, 1000, []*structs.Allocation{alloc1, alloc2}); err != nil {
			t.Fatalf("err: %v", err)
		}

		// Make the HTTP request
		req, err := http.NewRequest("GET", "/v1/allocations?prefix=aaab", nil)
		if err != nil {
			t.Fatalf("err: %v", err)
		}
		respW := httptest.NewRecorder()

		// Make the request
		obj, err := s.Server.AllocsRequest(respW, req)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		// Check for the index
		if respW.Result().Header.Get("X-Nomad-Index") == "" {
			t.Fatalf("missing index")
		}
		if respW.Result().Header.Get("X-Nomad-KnownLeader") != "true" {
			t.Fatalf("missing known leader")
		}
		if respW.Result().Header.Get("X-Nomad-LastContact") == "" {
			t.Fatalf("missing last contact")
		}

		// Check the alloc
		n := obj.([]*structs.AllocListStub)
		if len(n) != 1 {
			t.Fatalf("bad: %#v", n)
		}

		// Check the identifier
		if n[0].ID != alloc2.ID {
			t.Fatalf("expected alloc ID: %v, Actual: %v", alloc2.ID, n[0].ID)
		}
		expectedMsg := "Task's sibling failed"
		displayMsg1 := n[0].TaskStates["test"].Events[0].DisplayMessage
		require.Equal(t, expectedMsg, displayMsg1, "DisplayMessage should be set")

	})
}

func TestHTTP_AllocQuery(t *testing.T) {
	ci.Parallel(t)
	require := require.New(t)
	httpTest(t, nil, func(s *TestAgent) {
		// Directly manipulate the state
		state := s.Agent.server.State()
		alloc := mock.Alloc()
		require.NoError(state.UpsertJobSummary(999, mock.JobSummary(alloc.JobID)))
		require.NoError(state.UpsertAllocs(structs.MsgTypeTestSetup, 1000, []*structs.Allocation{alloc}))

		// Make the HTTP request
		req, err := http.NewRequest("GET", "/v1/allocation/"+alloc.ID, nil)
		require.NoError(err)
		respW := httptest.NewRecorder()

		// Make the request
		obj, err := s.Server.AllocSpecificRequest(respW, req)
		require.NoError(err)

		// Check for the index
		require.NotEmpty(respW.Header().Get("X-Nomad-Index"), "missing index")
		require.Equal("true", respW.Header().Get("X-Nomad-KnownLeader"), "missing known leader")
		require.NotEmpty(respW.Header().Get("X-Nomad-LastContact"), "missing last contact")

		// Check the job
		a := obj.(*structs.Allocation)
		require.Equal(a.ID, alloc.ID)

		// Check the number of ports
		require.Len(a.AllocatedResources.Shared.Ports, 2)

		// Make the request again
		respW = httptest.NewRecorder()
		obj, err = s.Server.AllocSpecificRequest(respW, req)
		require.NoError(err)
		a = obj.(*structs.Allocation)
		// Check the number of ports again
		require.Len(a.AllocatedResources.Shared.Ports, 2)
	})
}

func TestHTTP_AllocQuery_Payload(t *testing.T) {
	ci.Parallel(t)
	httpTest(t, nil, func(s *TestAgent) {
		// Directly manipulate the state
		state := s.Agent.server.State()
		alloc := mock.Alloc()
		if err := state.UpsertJobSummary(999, mock.JobSummary(alloc.JobID)); err != nil {
			t.Fatal(err)
		}

		// Insert Payload compressed
		expected := []byte("hello world")
		compressed := snappy.Encode(nil, expected)
		alloc.Job.Payload = compressed

		err := state.UpsertAllocs(structs.MsgTypeTestSetup, 1000, []*structs.Allocation{alloc})
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		// Make the HTTP request
		req, err := http.NewRequest("GET", "/v1/allocation/"+alloc.ID, nil)
		if err != nil {
			t.Fatalf("err: %v", err)
		}
		respW := httptest.NewRecorder()

		// Make the request
		obj, err := s.Server.AllocSpecificRequest(respW, req)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		// Check for the index
		if respW.Result().Header.Get("X-Nomad-Index") == "" {
			t.Fatalf("missing index")
		}
		if respW.Result().Header.Get("X-Nomad-KnownLeader") != "true" {
			t.Fatalf("missing known leader")
		}
		if respW.Result().Header.Get("X-Nomad-LastContact") == "" {
			t.Fatalf("missing last contact")
		}

		// Check the job
		a := obj.(*structs.Allocation)
		if a.ID != alloc.ID {
			t.Fatalf("bad: %#v", a)
		}

		// Check the payload is decompressed
		if !reflect.DeepEqual(a.Job.Payload, expected) {
			t.Fatalf("Payload not decompressed properly; got %#v; want %#v", a.Job.Payload, expected)
		}
	})
}

func TestHTTP_AllocRestart(t *testing.T) {
	ci.Parallel(t)
	require := require.New(t)

	// Validates that all methods of forwarding the request are processed correctly
	httpTest(t, nil, func(s *TestAgent) {
		// Local node, local resp
		{
			// Make the HTTP request
			buf := encodeReq(map[string]string{})
			req, err := http.NewRequest("GET", fmt.Sprintf("/v1/client/allocation/%s/restart", uuid.Generate()), buf)
			if err != nil {
				t.Fatalf("err: %v", err)
			}
			respW := httptest.NewRecorder()

			// Make the request
			_, err = s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err))
		}

		// Local node, server resp
		{
			srv := s.server
			s.server = nil

			buf := encodeReq(map[string]string{})
			req, err := http.NewRequest("GET", fmt.Sprintf("/v1/client/allocation/%s/restart", uuid.Generate()), buf)
			require.Nil(err)

			respW := httptest.NewRecorder()
			_, err = s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err))

			s.server = srv
		}

		// no client, server resp
		{
			c := s.client
			s.client = nil

			testutil.WaitForResult(func() (bool, error) {
				n, err := s.server.State().NodeByID(nil, c.NodeID())
				if err != nil {
					return false, err
				}
				return n != nil, nil
			}, func(err error) {
				t.Fatalf("should have client: %v", err)
			})

			buf := encodeReq(map[string]string{})
			req, err := http.NewRequest("GET", fmt.Sprintf("/v1/client/allocation/%s/restart", uuid.Generate()), buf)
			require.Nil(err)

			respW := httptest.NewRecorder()
			_, err = s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err))

			s.client = c
		}
	})
}

func TestHTTP_AllocRestart_ACL(t *testing.T) {
	ci.Parallel(t)
	require := require.New(t)

	httpACLTest(t, nil, func(s *TestAgent) {
		state := s.Agent.server.State()

		// If there's no token, we expect the request to fail.
		{
			buf := encodeReq(map[string]string{})
			req, err := http.NewRequest("GET", fmt.Sprintf("/v1/client/allocation/%s/restart", uuid.Generate()), buf)
			require.NoError(err)

			respW := httptest.NewRecorder()
			_, err = s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err), "(%T) %v", err, err)
		}

		// Try request with an invalid token and expect it to fail
		{
			buf := encodeReq(map[string]string{})
			req, err := http.NewRequest("GET", fmt.Sprintf("/v1/client/allocation/%s/restart", uuid.Generate()), buf)
			require.NoError(err)

			respW := httptest.NewRecorder()
			token := mock.CreatePolicyAndToken(t, state, 1005, "invalid", mock.NodePolicy(acl.PolicyWrite))
			setToken(req, token)
			_, err = s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err), "(%T) %v", err, err)
		}

		// Try request with a valid token
		// Still returns an error because the alloc does not exist
		{
			buf := encodeReq(map[string]string{})
			req, err := http.NewRequest("GET", fmt.Sprintf("/v1/client/allocation/%s/restart", uuid.Generate()), buf)
			require.NoError(err)

			respW := httptest.NewRecorder()
			policy := mock.NamespacePolicy(structs.DefaultNamespace, "", []string{acl.NamespaceCapabilityAllocLifecycle})
			token := mock.CreatePolicyAndToken(t, state, 1007, "valid", policy)
			setToken(req, token)
			_, err = s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err), "(%T) %v", err, err)
		}

		// Try request with a management token
		// Still returns an error because the alloc does not exist
		{
			buf := encodeReq(map[string]string{})
			req, err := http.NewRequest("GET", fmt.Sprintf("/v1/client/allocation/%s/restart", uuid.Generate()), buf)
			require.NoError(err)

			respW := httptest.NewRecorder()
			setToken(req, s.RootToken)
			_, err = s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err))
		}
	})
}

func TestHTTP_AllocStop(t *testing.T) {
	ci.Parallel(t)
	httpTest(t, nil, func(s *TestAgent) {
		// Directly manipulate the state
		state := s.Agent.server.State()
		alloc := mock.Alloc()
		require := require.New(t)
		require.NoError(state.UpsertJobSummary(999, mock.JobSummary(alloc.JobID)))

		require.NoError(state.UpsertAllocs(structs.MsgTypeTestSetup, 1000, []*structs.Allocation{alloc}))

		// Test that the happy path works
		{
			// Make the HTTP request
			req, err := http.NewRequest("POST", "/v1/allocation/"+alloc.ID+"/stop", nil)
			require.NoError(err)
			respW := httptest.NewRecorder()

			// Make the request
			obj, err := s.Server.AllocSpecificRequest(respW, req)
			require.NoError(err)

			a := obj.(*structs.AllocStopResponse)
			require.NotEmpty(a.EvalID, "missing eval")
			require.NotEmpty(a.Index, "missing index")
			headerIndex, _ := strconv.ParseUint(respW.Header().Get("X-Nomad-Index"), 10, 64)
			require.Equal(a.Index, headerIndex)
		}

		// Test that we 404 when the allocid is invalid
		{
			// Make the HTTP request
			req, err := http.NewRequest("POST", "/v1/allocation/"+uuid.Generate()+"/stop", nil)
			require.NoError(err)
			respW := httptest.NewRecorder()

			// Make the request
			_, err = s.Server.AllocSpecificRequest(respW, req)
			require.NotNil(err)
			if !strings.Contains(err.Error(), allocNotFoundErr) {
				t.Fatalf("err: %v", err)
			}
		}
	})
}

func TestHTTP_allocServiceRegistrations(t *testing.T) {
	ci.Parallel(t)

	testCases := []struct {
		testFn func(srv *TestAgent)
		name   string
	}{
		{
			testFn: func(s *TestAgent) {

				// Grab the state, so we can manipulate it and test against it.
				testState := s.Agent.server.State()

				// Generate an alloc and upsert this.
				alloc := mock.Alloc()
				require.NoError(t, testState.UpsertAllocs(
					structs.MsgTypeTestSetup, 10, []*structs.Allocation{alloc}))

				// Generate a service registration, assigned the allocID to the
				// mocked allocation ID, and upsert this.
				serviceReg := mock.ServiceRegistrations()[0]
				serviceReg.AllocID = alloc.ID
				require.NoError(t, testState.UpsertServiceRegistrations(
					structs.MsgTypeTestSetup, 20, []*structs.ServiceRegistration{serviceReg}))

				// Build the HTTP request.
				path := fmt.Sprintf("/v1/allocation/%s/services", alloc.ID)
				req, err := http.NewRequest(http.MethodGet, path, nil)
				require.NoError(t, err)
				respW := httptest.NewRecorder()

				// Send the HTTP request.
				obj, err := s.Server.AllocSpecificRequest(respW, req)
				require.NoError(t, err)

				// Check the response.
				require.Equal(t, "20", respW.Header().Get("X-Nomad-Index"))
				require.ElementsMatch(t, []*structs.ServiceRegistration{serviceReg},
					obj.([]*structs.ServiceRegistration))
			},
			name: "alloc has registrations",
		},
		{
			testFn: func(s *TestAgent) {

				// Grab the state, so we can manipulate it and test against it.
				testState := s.Agent.server.State()

				// Generate an alloc and upsert this.
				alloc := mock.Alloc()
				require.NoError(t, testState.UpsertAllocs(
					structs.MsgTypeTestSetup, 10, []*structs.Allocation{alloc}))

				// Build the HTTP request.
				path := fmt.Sprintf("/v1/allocation/%s/services", alloc.ID)
				req, err := http.NewRequest(http.MethodGet, path, nil)
				require.NoError(t, err)
				respW := httptest.NewRecorder()

				// Send the HTTP request.
				obj, err := s.Server.AllocSpecificRequest(respW, req)
				require.NoError(t, err)

				// Check the response.
				require.Equal(t, "1", respW.Header().Get("X-Nomad-Index"))
				require.ElementsMatch(t, []*structs.ServiceRegistration{},
					obj.([]*structs.ServiceRegistration))
			},
			name: "alloc without registrations",
		},
		{
			testFn: func(s *TestAgent) {

				// Build the HTTP request.
				path := fmt.Sprintf("/v1/allocation/%s/services", uuid.Generate())
				req, err := http.NewRequest(http.MethodGet, path, nil)
				require.NoError(t, err)
				respW := httptest.NewRecorder()

				// Send the HTTP request.
				obj, err := s.Server.AllocSpecificRequest(respW, req)
				require.Error(t, err)
				require.Contains(t, err.Error(), "allocation not found")
				require.Nil(t, obj)
			},
			name: "alloc not found",
		},
		{
			testFn: func(s *TestAgent) {

				// Build the HTTP request.
				path := fmt.Sprintf("/v1/allocation/%s/services", uuid.Generate())
				req, err := http.NewRequest(http.MethodHead, path, nil)
				require.NoError(t, err)
				respW := httptest.NewRecorder()

				// Send the HTTP request.
				obj, err := s.Server.AllocSpecificRequest(respW, req)
				require.Error(t, err)
				require.Contains(t, err.Error(), "Invalid method")
				require.Nil(t, obj)
			},
			name: "alloc not found",
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			httpTest(t, nil, tc.testFn)
		})
	}
}

func TestHTTP_AllocStats(t *testing.T) {
	ci.Parallel(t)
	require := require.New(t)

	httpTest(t, nil, func(s *TestAgent) {
		// Local node, local resp
		{
			// Make the HTTP request
			req, err := http.NewRequest("GET", fmt.Sprintf("/v1/client/allocation/%s/stats", uuid.Generate()), nil)
			if err != nil {
				t.Fatalf("err: %v", err)
			}
			respW := httptest.NewRecorder()

			// Make the request
			_, err = s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err))
		}

		// Local node, server resp
		{
			srv := s.server
			s.server = nil

			req, err := http.NewRequest("GET", fmt.Sprintf("/v1/client/allocation/%s/stats", uuid.Generate()), nil)
			require.Nil(err)

			respW := httptest.NewRecorder()
			_, err = s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err))

			s.server = srv
		}

		// no client, server resp
		{
			c := s.client
			s.client = nil

			testutil.WaitForResult(func() (bool, error) {
				n, err := s.server.State().NodeByID(nil, c.NodeID())
				if err != nil {
					return false, err
				}
				return n != nil, nil
			}, func(err error) {
				t.Fatalf("should have client: %v", err)
			})

			req, err := http.NewRequest("GET", fmt.Sprintf("/v1/client/allocation/%s/stats", uuid.Generate()), nil)
			require.Nil(err)

			respW := httptest.NewRecorder()
			_, err = s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err))

			s.client = c
		}
	})
}

func TestHTTP_AllocStats_ACL(t *testing.T) {
	ci.Parallel(t)
	require := require.New(t)

	httpACLTest(t, nil, func(s *TestAgent) {
		state := s.Agent.server.State()

		// Make the HTTP request
		req, err := http.NewRequest("GET", fmt.Sprintf("/v1/client/allocation/%s/stats", uuid.Generate()), nil)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		// Try request without a token and expect failure
		{
			respW := httptest.NewRecorder()
			_, err := s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err), "(%T) %v", err, err)
		}

		// Try request with an invalid token and expect failure
		{
			respW := httptest.NewRecorder()
			token := mock.CreatePolicyAndToken(t, state, 1005, "invalid", mock.NodePolicy(acl.PolicyWrite))
			setToken(req, token)
			_, err := s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err), "(%T) %v", err, err)
		}

		// Try request with a valid token
		// Still returns an error because the alloc does not exist
		{
			respW := httptest.NewRecorder()
			policy := mock.NamespacePolicy(structs.DefaultNamespace, "", []string{acl.NamespaceCapabilityReadJob})
			token := mock.CreatePolicyAndToken(t, state, 1007, "valid", policy)
			setToken(req, token)
			_, err := s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err), "(%T) %v", err, err)
		}

		// Try request with a management token
		// Still returns an error because the alloc does not exist
		{
			respW := httptest.NewRecorder()
			setToken(req, s.RootToken)
			_, err := s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err))
		}
	})
}

func TestHTTP_AllocSnapshot(t *testing.T) {
	ci.Parallel(t)
	httpTest(t, nil, func(s *TestAgent) {
		// Make the HTTP request
		req, err := http.NewRequest("GET", "/v1/client/allocation/123/snapshot", nil)
		if err != nil {
			t.Fatalf("err: %v", err)
		}
		respW := httptest.NewRecorder()

		// Make the request
		_, err = s.Server.ClientAllocRequest(respW, req)
		if !strings.Contains(err.Error(), allocNotFoundErr) {
			t.Fatalf("err: %v", err)
		}
	})
}

func TestHTTP_AllocSnapshot_WithMigrateToken(t *testing.T) {
	ci.Parallel(t)
	require := require.New(t)
	httpACLTest(t, nil, func(s *TestAgent) {
		// Request without a token fails
		req, err := http.NewRequest("GET", "/v1/client/allocation/123/snapshot", nil)
		require.Nil(err)

		// Make the unauthorized request
		respW := httptest.NewRecorder()
		_, err = s.Server.ClientAllocRequest(respW, req)
		require.NotNil(err)
		require.EqualError(err, structs.ErrPermissionDenied.Error())

		// Create an allocation
		alloc := mock.Alloc()

		validMigrateToken, err := structs.GenerateMigrateToken(alloc.ID, s.Agent.Client().Node().SecretID)
		require.Nil(err)

		// Request with a token succeeds
		url := fmt.Sprintf("/v1/client/allocation/%s/snapshot", alloc.ID)
		req, err = http.NewRequest("GET", url, nil)
		require.Nil(err)

		req.Header.Set("X-Nomad-Token", validMigrateToken)

		// Make the unauthorized request
		respW = httptest.NewRecorder()
		_, err = s.Server.ClientAllocRequest(respW, req)
		require.NotContains(err.Error(), structs.ErrPermissionDenied.Error())
	})
}

// TestHTTP_AllocSnapshot_Atomic ensures that when a client encounters an error
// snapshotting a valid tar is not returned.
func TestHTTP_AllocSnapshot_Atomic(t *testing.T) {
	ci.Parallel(t)
	httpTest(t, func(c *Config) {
		// Disable the schedulers
		c.Server.NumSchedulers = helper.IntToPtr(0)
	}, func(s *TestAgent) {
		// Create an alloc
		state := s.server.State()
		alloc := mock.Alloc()
		alloc.Job.TaskGroups[0].Tasks[0].Driver = "mock_driver"
		alloc.Job.TaskGroups[0].Tasks[0].Config = map[string]interface{}{
			"run_for": "30s",
		}
		alloc.NodeID = s.client.NodeID()
		state.UpsertJobSummary(998, mock.JobSummary(alloc.JobID))
		if err := state.UpsertAllocs(structs.MsgTypeTestSetup, 1000, []*structs.Allocation{alloc.Copy()}); err != nil {
			t.Fatalf("error upserting alloc: %v", err)
		}

		// Wait for the client to run it
		testutil.WaitForResult(func() (bool, error) {
			if _, err := s.client.GetAllocState(alloc.ID); err != nil {
				return false, err
			}

			serverAlloc, err := state.AllocByID(nil, alloc.ID)
			if err != nil {
				return false, err
			}

			return serverAlloc.ClientStatus == structs.AllocClientStatusRunning, fmt.Errorf(serverAlloc.ClientStatus)
		}, func(err error) {
			t.Fatalf("client not running alloc: %v", err)
		})

		// Now write to its shared dir
		allocDirI, err := s.client.GetAllocFS(alloc.ID)
		if err != nil {
			t.Fatalf("unable to find alloc dir: %v", err)
		}
		allocDir := allocDirI.(*allocdir.AllocDir)

		// Remove the task dir to break Snapshot
		os.RemoveAll(allocDir.TaskDirs["web"].LocalDir)

		// require Snapshot fails
		if err := allocDir.Snapshot(ioutil.Discard); err != nil {
			t.Logf("[DEBUG] agent.test: snapshot returned error: %v", err)
		} else {
			t.Errorf("expected Snapshot() to fail but it did not")
		}

		// Make the HTTP request to ensure the Snapshot error is
		// propagated through to the HTTP layer. Since the tar is
		// streamed over a 200 HTTP response the only way to signal an
		// error is by writing a marker file.
		respW := httptest.NewRecorder()
		req, err := http.NewRequest("GET", fmt.Sprintf("/v1/client/allocation/%s/snapshot", alloc.ID), nil)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		// Make the request via the mux to make sure the error returned
		// by Snapshot is properly propagated via HTTP
		s.Server.mux.ServeHTTP(respW, req)
		resp := respW.Result()
		r := tar.NewReader(resp.Body)
		errorFilename := allocdir.SnapshotErrorFilename(alloc.ID)
		markerFound := false
		markerContents := ""
		for {
			header, err := r.Next()
			if err != nil {
				if err != io.EOF {
					// Huh, I wonder how a non-EOF error can happen?
					t.Errorf("Unexpected error while streaming: %v", err)
				}
				break
			}

			if markerFound {
				// No more files should be found after the failure marker
				t.Errorf("Next file found after error marker: %s", header.Name)
				break
			}

			if header.Name == errorFilename {
				// Found it!
				markerFound = true
				buf := make([]byte, int(header.Size))
				if _, err := r.Read(buf); err != nil && err != io.EOF {
					t.Errorf("Unexpected error reading error marker %s: %v", errorFilename, err)
				} else {
					markerContents = string(buf)
				}
			}
		}

		if !markerFound {
			t.Fatalf("marker file %s not written; bad tar will be treated as good!", errorFilename)
		}
		if markerContents == "" {
			t.Fatalf("marker file %s empty", markerContents)
		} else {
			t.Logf("EXPECTED snapshot error: %s", markerContents)
		}
	})
}

func TestHTTP_AllocGC(t *testing.T) {
	ci.Parallel(t)
	require := require.New(t)
	path := fmt.Sprintf("/v1/client/allocation/%s/gc", uuid.Generate())
	httpTest(t, nil, func(s *TestAgent) {
		// Local node, local resp
		{
			req, err := http.NewRequest("GET", path, nil)
			if err != nil {
				t.Fatalf("err: %v", err)
			}

			respW := httptest.NewRecorder()
			_, err = s.Server.ClientAllocRequest(respW, req)
			if !structs.IsErrUnknownAllocation(err) {
				t.Fatalf("unexpected err: %v", err)
			}
		}

		// Local node, server resp
		{
			srv := s.server
			s.server = nil

			req, err := http.NewRequest("GET", path, nil)
			if err != nil {
				t.Fatalf("err: %v", err)
			}

			respW := httptest.NewRecorder()
			_, err = s.Server.ClientAllocRequest(respW, req)
			if !structs.IsErrUnknownAllocation(err) {
				t.Fatalf("unexpected err: %v", err)
			}

			s.server = srv
		}

		// no client, server resp
		{
			c := s.client
			s.client = nil

			testutil.WaitForResult(func() (bool, error) {
				n, err := s.server.State().NodeByID(nil, c.NodeID())
				if err != nil {
					return false, err
				}
				return n != nil, nil
			}, func(err error) {
				t.Fatalf("should have client: %v", err)
			})

			req, err := http.NewRequest("GET", path, nil)
			if err != nil {
				t.Fatalf("err: %v", err)
			}

			respW := httptest.NewRecorder()
			_, err = s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			if !structs.IsErrUnknownAllocation(err) {
				t.Fatalf("unexpected err: %v", err)
			}

			s.client = c
		}
	})
}

func TestHTTP_AllocGC_ACL(t *testing.T) {
	ci.Parallel(t)
	require := require.New(t)
	path := fmt.Sprintf("/v1/client/allocation/%s/gc", uuid.Generate())

	httpACLTest(t, nil, func(s *TestAgent) {
		state := s.Agent.server.State()

		// Make the HTTP request
		req, err := http.NewRequest("GET", path, nil)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		// Try request without a token and expect failure
		{
			respW := httptest.NewRecorder()
			_, err := s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err), "(%T) %v", err, err)
		}

		// Try request with an invalid token and expect failure
		{
			respW := httptest.NewRecorder()
			token := mock.CreatePolicyAndToken(t, state, 1005, "invalid", mock.NodePolicy(acl.PolicyWrite))
			setToken(req, token)
			_, err := s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err), "(%T) %v", err, err)
		}

		// Try request with a valid token
		// Still returns an error because the alloc does not exist
		{
			respW := httptest.NewRecorder()
			policy := mock.NamespacePolicy(structs.DefaultNamespace, "", []string{acl.NamespaceCapabilitySubmitJob})
			token := mock.CreatePolicyAndToken(t, state, 1007, "valid", policy)
			setToken(req, token)
			_, err := s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err), "(%T) %v", err, err)
		}

		// Try request with a management token
		// Still returns an error because the alloc does not exist
		{
			respW := httptest.NewRecorder()
			setToken(req, s.RootToken)
			_, err := s.Server.ClientAllocRequest(respW, req)
			require.NotNil(err)
			require.True(structs.IsErrUnknownAllocation(err))
		}
	})
}

func TestHTTP_AllocAllGC(t *testing.T) {
	ci.Parallel(t)
	require := require.New(t)
	httpTest(t, nil, func(s *TestAgent) {
		// Local node, local resp
		{
			req, err := http.NewRequest("GET", "/v1/client/gc", nil)
			if err != nil {
				t.Fatalf("err: %v", err)
			}

			respW := httptest.NewRecorder()
			_, err = s.Server.ClientGCRequest(respW, req)
			if err != nil {
				t.Fatalf("unexpected err: %v", err)
			}
		}

		// Local node, server resp
		{
			srv := s.server
			s.server = nil

			req, err := http.NewRequest("GET", fmt.Sprintf("/v1/client/gc?node_id=%s", uuid.Generate()), nil)
			require.Nil(err)

			respW := httptest.NewRecorder()
			_, err = s.Server.ClientGCRequest(respW, req)
			require.NotNil(err)
			require.Contains(err.Error(), "Unknown node")

			s.server = srv
		}

		// client stats from server, should not error
		{
			c := s.client
			s.client = nil

			testutil.WaitForResult(func() (bool, error) {
				n, err := s.server.State().NodeByID(nil, c.NodeID())
				if err != nil {
					return false, err
				}
				return n != nil, nil
			}, func(err error) {
				t.Fatalf("should have client: %v", err)
			})

			req, err := http.NewRequest("GET", fmt.Sprintf("/v1/client/gc?node_id=%s", c.NodeID()), nil)
			require.Nil(err)

			respW := httptest.NewRecorder()
			_, err = s.Server.ClientGCRequest(respW, req)
			require.Nil(err)

			s.client = c
		}
	})

}

func TestHTTP_AllocAllGC_ACL(t *testing.T) {
	ci.Parallel(t)
	require := require.New(t)
	httpACLTest(t, nil, func(s *TestAgent) {
		state := s.Agent.server.State()

		// Make the HTTP request
		req, err := http.NewRequest("GET", "/v1/client/gc", nil)
		require.Nil(err)

		// Try request without a token and expect failure
		{
			respW := httptest.NewRecorder()
			_, err := s.Server.ClientGCRequest(respW, req)
			require.NotNil(err)
			require.Equal(err.Error(), structs.ErrPermissionDenied.Error())
		}

		// Try request with an invalid token and expect failure
		{
			respW := httptest.NewRecorder()
			token := mock.CreatePolicyAndToken(t, state, 1005, "invalid", mock.NodePolicy(acl.PolicyRead))
			setToken(req, token)
			_, err := s.Server.ClientGCRequest(respW, req)
			require.NotNil(err)
			require.Equal(err.Error(), structs.ErrPermissionDenied.Error())
		}

		// Try request with a valid token
		{
			respW := httptest.NewRecorder()
			token := mock.CreatePolicyAndToken(t, state, 1007, "valid", mock.NodePolicy(acl.PolicyWrite))
			setToken(req, token)
			_, err := s.Server.ClientGCRequest(respW, req)
			require.Nil(err)
			require.Equal(http.StatusOK, respW.Code)
		}

		// Try request with a management token
		{
			respW := httptest.NewRecorder()
			setToken(req, s.RootToken)
			_, err := s.Server.ClientGCRequest(respW, req)
			require.Nil(err)
			require.Equal(http.StatusOK, respW.Code)
		}
	})
}

func TestHTTP_ReadWsHandshake(t *testing.T) {
	ci.Parallel(t)

	cases := []struct {
		name      string
		token     string
		handshake bool
	}{
		{
			name:      "plain compatible mode",
			token:     "",
			handshake: false,
		},
		{
			name:      "handshake unauthenticated",
			token:     "",
			handshake: true,
		},
		{
			name:      "handshake authenticated",
			token:     "mysupersecret",
			handshake: true,
		},
	}

	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {

			called := false
			readFn := func(h interface{}) error {
				called = true
				if !c.handshake {
					return fmt.Errorf("should not be called")
				}

				hm := h.(*wsHandshakeMessage)
				hm.Version = 1
				hm.AuthToken = c.token
				return nil
			}

			req := httptest.NewRequest("PUT", "/target", nil)
			if c.handshake {
				req.URL.RawQuery = "ws_handshake=true"
			}

			var q structs.QueryOptions

			err := readWsHandshake(readFn, req, &q)
			require.NoError(t, err)
			require.Equal(t, c.token, q.AuthToken)
			require.Equal(t, c.handshake, called)
		})
	}
}
