package agent

import (
	"fmt"
	"net/http"
	"net/http/httptest"
	"reflect"
	"strings"
	"testing"

	"github.com/golang/snappy"
	"github.com/hashicorp/nomad/acl"
	"github.com/hashicorp/nomad/nomad/mock"
	"github.com/hashicorp/nomad/nomad/structs"
	"github.com/stretchr/testify/assert"
	"golang.org/x/crypto/blake2b"
)

func TestHTTP_AllocsList(t *testing.T) {
	t.Parallel()
	httpTest(t, nil, func(s *TestAgent) {
		// Directly manipulate the state
		state := s.Agent.server.State()
		alloc1 := mock.Alloc()
		alloc2 := mock.Alloc()
		state.UpsertJobSummary(998, mock.JobSummary(alloc1.JobID))
		state.UpsertJobSummary(999, mock.JobSummary(alloc2.JobID))
		err := state.UpsertAllocs(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.HeaderMap.Get("X-Nomad-Index") == "" {
			t.Fatalf("missing index")
		}
		if respW.HeaderMap.Get("X-Nomad-KnownLeader") != "true" {
			t.Fatalf("missing known leader")
		}
		if respW.HeaderMap.Get("X-Nomad-LastContact") == "" {
			t.Fatalf("missing last contact")
		}

		// Check the alloc
		n := obj.([]*structs.AllocListStub)
		if len(n) != 2 {
			t.Fatalf("bad: %#v", n)
		}
	})
}

func TestHTTP_AllocsPrefixList(t *testing.T) {
	t.Parallel()
	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"
		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(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.HeaderMap.Get("X-Nomad-Index") == "" {
			t.Fatalf("missing index")
		}
		if respW.HeaderMap.Get("X-Nomad-KnownLeader") != "true" {
			t.Fatalf("missing known leader")
		}
		if respW.HeaderMap.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)
		}
	})
}

func TestHTTP_AllocQuery(t *testing.T) {
	t.Parallel()
	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)
		}
		err := state.UpsertAllocs(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.HeaderMap.Get("X-Nomad-Index") == "" {
			t.Fatalf("missing index")
		}
		if respW.HeaderMap.Get("X-Nomad-KnownLeader") != "true" {
			t.Fatalf("missing known leader")
		}
		if respW.HeaderMap.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)
		}
	})
}

func TestHTTP_AllocQuery_Payload(t *testing.T) {
	t.Parallel()
	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(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.HeaderMap.Get("X-Nomad-Index") == "" {
			t.Fatalf("missing index")
		}
		if respW.HeaderMap.Get("X-Nomad-KnownLeader") != "true" {
			t.Fatalf("missing known leader")
		}
		if respW.HeaderMap.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_AllocStats(t *testing.T) {
	t.Parallel()
	httpTest(t, nil, func(s *TestAgent) {
		// Make the HTTP request
		req, err := http.NewRequest("GET", "/v1/client/allocation/123/foo", 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(), resourceNotFoundErr) {
			t.Fatalf("err: %v", err)
		}
	})
}

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

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

		// Make the HTTP request
		req, err := http.NewRequest("GET", "/v1/client/allocation/123/stats", 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)
			assert.NotNil(err)
			assert.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.PolicyWrite))
			setToken(req, token)
			_, err := s.Server.ClientAllocRequest(respW, req)
			assert.NotNil(err)
			assert.Equal(err.Error(), structs.ErrPermissionDenied.Error())
		}

		// 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)
			assert.NotNil(err)
			assert.Contains(err.Error(), "unknown allocation ID")
		}

		// 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)
			assert.NotNil(err)
			assert.Contains(err.Error(), "unknown allocation ID")
		}
	})
}

func TestHTTP_AllocSnapshot(t *testing.T) {
	t.Parallel()
	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 createMigrateTokenForClientAndAlloc(allocID, clientSecret string) (string, error) {
	h, err := blake2b.New512([]byte(clientSecret))

	if err != nil {
		return "", err
	}

	h.Write([]byte(allocID))
	validMigrateToken, err := string(h.Sum(nil)), nil
	return validMigrateToken, err
}

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

		// Make the unauthorized request
		respW := httptest.NewRecorder()
		_, err = s.Server.ClientAllocRequest(respW, req)
		assert.NotNil(err)
		assert.Contains(err.Error(), "invalid migrate token")

		// Create an allocation
		state := s.Agent.server.State()
		alloc := mock.Alloc()
		state.UpsertJobSummary(998, mock.JobSummary(alloc.JobID))

		validMigrateToken, err := createMigrateTokenForClientAndAlloc(alloc.ID, s.Agent.Client().Node().SecretID)
		assert.Nil(err)

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

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

		// Make the unauthorized request
		respW = httptest.NewRecorder()
		_, err = s.Server.ClientAllocRequest(respW, req)
		assert.NotContains(err.Error(), "invalid migrate token")
	})
}

func TestHTTP_AllocGC(t *testing.T) {
	t.Parallel()
	httpTest(t, nil, func(s *TestAgent) {
		// Make the HTTP request
		req, err := http.NewRequest("GET", "/v1/client/allocation/123/gc", 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(), "unable to collect allocation") {
			t.Fatalf("err: %v", err)
		}
	})
}

func TestHTTP_AllocGC_ACL(t *testing.T) {
	t.Parallel()
	assert := assert.New(t)

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

		// Make the HTTP request
		req, err := http.NewRequest("GET", "/v1/client/allocation/123/gc", 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)
			assert.NotNil(err)
			assert.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.PolicyWrite))
			setToken(req, token)
			_, err := s.Server.ClientAllocRequest(respW, req)
			assert.NotNil(err)
			assert.Equal(err.Error(), structs.ErrPermissionDenied.Error())
		}

		// 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)
			assert.NotNil(err)
			assert.Contains(err.Error(), "not present")
		}

		// 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)
			assert.NotNil(err)
			assert.Contains(err.Error(), "not present")
		}
	})
}

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

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

}

func TestHTTP_AllocAllGC_ACL(t *testing.T) {
	t.Parallel()
	assert := assert.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)
		assert.Nil(err)

		// Try request without a token and expect failure
		{
			respW := httptest.NewRecorder()
			_, err := s.Server.ClientGCRequest(respW, req)
			assert.NotNil(err)
			assert.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)
			assert.NotNil(err)
			assert.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)
			assert.Nil(err)
			assert.Equal(http.StatusOK, respW.Code)
		}

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

}