package pluginproxy

import (
	"bytes"
	"context"
	"fmt"
	"io/ioutil"
	"net/http"
	"net/http/httptest"
	"net/url"
	"strings"
	"testing"
	"time"

	"github.com/grafana/grafana/pkg/api/datasource"
	"github.com/grafana/grafana/pkg/bus"
	"github.com/grafana/grafana/pkg/components/simplejson"
	"github.com/grafana/grafana/pkg/infra/httpclient"
	"github.com/grafana/grafana/pkg/infra/tracing"
	"github.com/grafana/grafana/pkg/models"
	"github.com/grafana/grafana/pkg/plugins"
	acmock "github.com/grafana/grafana/pkg/services/accesscontrol/mock"
	"github.com/grafana/grafana/pkg/services/datasources"
	"github.com/grafana/grafana/pkg/services/oauthtoken"
	"github.com/grafana/grafana/pkg/services/secrets"
	"github.com/grafana/grafana/pkg/services/secrets/fakes"
	secretsManager "github.com/grafana/grafana/pkg/services/secrets/manager"
	"github.com/grafana/grafana/pkg/setting"
	"github.com/grafana/grafana/pkg/web"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"golang.org/x/oauth2"
)

func TestDataSourceProxy_routeRule(t *testing.T) {
	httpClientProvider := httpclient.NewProvider()
	tracer, err := tracing.InitializeTracerForTest()
	require.NoError(t, err)

	t.Run("Plugin with routes", func(t *testing.T) {
		routes := []*plugins.Route{
			{
				Path:    "api/v4/",
				URL:     "https://www.google.com",
				ReqRole: models.ROLE_EDITOR,
				Headers: []plugins.Header{
					{Name: "x-header", Content: "my secret {{.SecureJsonData.key}}"},
				},
			},
			{
				Path:    "api/admin",
				URL:     "https://www.google.com",
				ReqRole: models.ROLE_ADMIN,
				Headers: []plugins.Header{
					{Name: "x-header", Content: "my secret {{.SecureJsonData.key}}"},
				},
			},
			{
				Path: "api/anon",
				URL:  "https://www.google.com",
				Headers: []plugins.Header{
					{Name: "x-header", Content: "my secret {{.SecureJsonData.key}}"},
				},
			},
			{
				Path: "api/common",
				URL:  "{{.JsonData.dynamicUrl}}",
				URLParams: []plugins.URLParam{
					{Name: "{{.JsonData.queryParam}}", Content: "{{.SecureJsonData.key}}"},
				},
				Headers: []plugins.Header{
					{Name: "x-header", Content: "my secret {{.SecureJsonData.key}}"},
				},
			},
			{
				Path:    "api/restricted",
				ReqRole: models.ROLE_ADMIN,
			},
			{
				Path: "api/body",
				URL:  "http://www.test.com",
				Body: []byte(`{ "url": "{{.JsonData.dynamicUrl}}", "secret": "{{.SecureJsonData.key}}"	}`),
			},
		}

		origSecretKey := setting.SecretKey
		t.Cleanup(func() {
			setting.SecretKey = origSecretKey
		})
		setting.SecretKey = "password" //nolint:goconst

		secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
		key, err := secretsService.Encrypt(context.Background(), []byte("123"), secrets.WithoutScope())
		require.NoError(t, err)

		ds := &models.DataSource{
			JsonData: simplejson.NewFromAny(map[string]interface{}{
				"clientId":   "asd",
				"dynamicUrl": "https://dynamic.grafana.com",
				"queryParam": "apiKey",
			}),
			SecureJsonData: map[string][]byte{
				"key": key,
			},
		}

		jd, err := ds.JsonData.Map()
		require.NoError(t, err)
		dsInfo := DSInfo{
			ID:       ds.Id,
			Updated:  ds.Updated,
			JSONData: jd,
			DecryptedSecureJSONData: map[string]string{
				"key": "123",
			},
		}

		setUp := func() (*models.ReqContext, *http.Request) {
			req, err := http.NewRequest("GET", "http://localhost/asd", nil)
			require.NoError(t, err)
			ctx := &models.ReqContext{
				Context:      &web.Context{Req: req},
				SignedInUser: &models.SignedInUser{OrgRole: models.ROLE_EDITOR},
			}
			return ctx, req
		}

		cfg := &setting.Cfg{}

		t.Run("When matching route path", func(t *testing.T) {
			ctx, req := setUp()
			dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
			proxy, err := NewDataSourceProxy(ds, routes, ctx, "api/v4/some/method", cfg, httpClientProvider,
				&oauthtoken.Service{}, dsService, tracer)
			require.NoError(t, err)
			proxy.matchedRoute = routes[0]
			ApplyRoute(proxy.ctx.Req.Context(), req, proxy.proxyPath, proxy.matchedRoute, dsInfo, cfg)

			assert.Equal(t, "https://www.google.com/some/method", req.URL.String())
			assert.Equal(t, "my secret 123", req.Header.Get("x-header"))
		})

		t.Run("When matching route path and has dynamic url", func(t *testing.T) {
			ctx, req := setUp()
			dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
			proxy, err := NewDataSourceProxy(ds, routes, ctx, "api/common/some/method", cfg, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
			require.NoError(t, err)
			proxy.matchedRoute = routes[3]
			ApplyRoute(proxy.ctx.Req.Context(), req, proxy.proxyPath, proxy.matchedRoute, dsInfo, cfg)

			assert.Equal(t, "https://dynamic.grafana.com/some/method?apiKey=123", req.URL.String())
			assert.Equal(t, "my secret 123", req.Header.Get("x-header"))
		})

		t.Run("When matching route path with no url", func(t *testing.T) {
			ctx, req := setUp()
			dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
			proxy, err := NewDataSourceProxy(ds, routes, ctx, "", cfg, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
			require.NoError(t, err)
			proxy.matchedRoute = routes[4]
			ApplyRoute(proxy.ctx.Req.Context(), req, proxy.proxyPath, proxy.matchedRoute, dsInfo, cfg)

			assert.Equal(t, "http://localhost/asd", req.URL.String())
		})

		t.Run("When matching route path and has dynamic body", func(t *testing.T) {
			ctx, req := setUp()
			dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
			proxy, err := NewDataSourceProxy(ds, routes, ctx, "api/body", cfg, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
			require.NoError(t, err)
			proxy.matchedRoute = routes[5]
			ApplyRoute(proxy.ctx.Req.Context(), req, proxy.proxyPath, proxy.matchedRoute, dsInfo, cfg)

			content, err := ioutil.ReadAll(req.Body)
			require.NoError(t, err)
			require.Equal(t, `{ "url": "https://dynamic.grafana.com", "secret": "123"	}`, string(content))
		})

		t.Run("Validating request", func(t *testing.T) {
			t.Run("plugin route with valid role", func(t *testing.T) {
				ctx, _ := setUp()
				dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
				proxy, err := NewDataSourceProxy(ds, routes, ctx, "api/v4/some/method", cfg, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
				require.NoError(t, err)
				err = proxy.validateRequest()
				require.NoError(t, err)
			})

			t.Run("plugin route with admin role and user is editor", func(t *testing.T) {
				ctx, _ := setUp()
				dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
				proxy, err := NewDataSourceProxy(ds, routes, ctx, "api/admin", cfg, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
				require.NoError(t, err)
				err = proxy.validateRequest()
				require.Error(t, err)
			})

			t.Run("plugin route with admin role and user is admin", func(t *testing.T) {
				ctx, _ := setUp()
				ctx.SignedInUser.OrgRole = models.ROLE_ADMIN
				dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
				proxy, err := NewDataSourceProxy(ds, routes, ctx, "api/admin", cfg, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
				require.NoError(t, err)
				err = proxy.validateRequest()
				require.NoError(t, err)
			})
		})
	})

	t.Run("Plugin with multiple routes for token auth", func(t *testing.T) {
		routes := []*plugins.Route{
			{
				Path: "pathwithtoken1",
				URL:  "https://api.nr1.io/some/path",
				TokenAuth: &plugins.JWTTokenAuth{
					Url: "https://login.server.com/{{.JsonData.tenantId}}/oauth2/token",
					Params: map[string]string{
						"grant_type":    "client_credentials",
						"client_id":     "{{.JsonData.clientId}}",
						"client_secret": "{{.SecureJsonData.clientSecret}}",
						"resource":      "https://api.nr1.io",
					},
				},
			},
			{
				Path: "pathwithtoken2",
				URL:  "https://api.nr2.io/some/path",
				TokenAuth: &plugins.JWTTokenAuth{
					Url: "https://login.server.com/{{.JsonData.tenantId}}/oauth2/token",
					Params: map[string]string{
						"grant_type":    "client_credentials",
						"client_id":     "{{.JsonData.clientId}}",
						"client_secret": "{{.SecureJsonData.clientSecret}}",
						"resource":      "https://api.nr2.io",
					},
				},
			},
		}

		origSecretKey := setting.SecretKey
		t.Cleanup(func() {
			setting.SecretKey = origSecretKey
		})
		setting.SecretKey = "password"

		secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
		key, err := secretsService.Encrypt(context.Background(), []byte("123"), secrets.WithoutScope())
		require.NoError(t, err)

		ds := &models.DataSource{
			JsonData: simplejson.NewFromAny(map[string]interface{}{
				"clientId": "asd",
				"tenantId": "mytenantId",
			}),
			SecureJsonData: map[string][]byte{
				"clientSecret": key,
			},
		}

		req, err := http.NewRequest("GET", "http://localhost/asd", nil)
		require.NoError(t, err)
		ctx := &models.ReqContext{
			Context:      &web.Context{Req: req},
			SignedInUser: &models.SignedInUser{OrgRole: models.ROLE_EDITOR},
		}

		t.Run("When creating and caching access tokens", func(t *testing.T) {
			var authorizationHeaderCall1 string
			var authorizationHeaderCall2 string

			t.Run("first call should add authorization header with access token", func(t *testing.T) {
				json, err := ioutil.ReadFile("./test-data/access-token-1.json")
				require.NoError(t, err)

				originalClient := client
				client = newFakeHTTPClient(t, json)
				defer func() { client = originalClient }()

				cfg := &setting.Cfg{}

				jd, err := ds.JsonData.Map()
				require.NoError(t, err)
				dsInfo := DSInfo{
					ID:       ds.Id,
					Updated:  ds.Updated,
					JSONData: jd,
					DecryptedSecureJSONData: map[string]string{
						"clientSecret": "123",
					},
				}

				dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
				proxy, err := NewDataSourceProxy(ds, routes, ctx, "pathwithtoken1", cfg, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
				require.NoError(t, err)
				ApplyRoute(proxy.ctx.Req.Context(), req, proxy.proxyPath, routes[0], dsInfo, cfg)

				authorizationHeaderCall1 = req.Header.Get("Authorization")
				assert.Equal(t, "https://api.nr1.io/some/path", req.URL.String())
				assert.True(t, strings.HasPrefix(authorizationHeaderCall1, "Bearer eyJ0e"))

				t.Run("second call to another route should add a different access token", func(t *testing.T) {
					json2, err := ioutil.ReadFile("./test-data/access-token-2.json")
					require.NoError(t, err)

					req, err := http.NewRequest("GET", "http://localhost/asd", nil)
					require.NoError(t, err)
					client = newFakeHTTPClient(t, json2)
					dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
					proxy, err := NewDataSourceProxy(ds, routes, ctx, "pathwithtoken2", cfg, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
					require.NoError(t, err)
					ApplyRoute(proxy.ctx.Req.Context(), req, proxy.proxyPath, routes[1], dsInfo, cfg)

					authorizationHeaderCall2 = req.Header.Get("Authorization")

					assert.Equal(t, "https://api.nr2.io/some/path", req.URL.String())
					assert.True(t, strings.HasPrefix(authorizationHeaderCall1, "Bearer eyJ0e"))
					assert.True(t, strings.HasPrefix(authorizationHeaderCall2, "Bearer eyJ0e"))
					assert.NotEqual(t, authorizationHeaderCall1, authorizationHeaderCall2)

					t.Run("third call to first route should add cached access token", func(t *testing.T) {
						req, err := http.NewRequest("GET", "http://localhost/asd", nil)
						require.NoError(t, err)

						client = newFakeHTTPClient(t, []byte{})
						dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
						proxy, err := NewDataSourceProxy(ds, routes, ctx, "pathwithtoken1", cfg, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
						require.NoError(t, err)
						ApplyRoute(proxy.ctx.Req.Context(), req, proxy.proxyPath, routes[0], dsInfo, cfg)

						authorizationHeaderCall3 := req.Header.Get("Authorization")
						assert.Equal(t, "https://api.nr1.io/some/path", req.URL.String())
						assert.True(t, strings.HasPrefix(authorizationHeaderCall1, "Bearer eyJ0e"))
						assert.True(t, strings.HasPrefix(authorizationHeaderCall3, "Bearer eyJ0e"))
						assert.Equal(t, authorizationHeaderCall1, authorizationHeaderCall3)
					})
				})
			})
		})
	})

	t.Run("When proxying graphite", func(t *testing.T) {
		var routes []*plugins.Route
		ds := &models.DataSource{Url: "htttp://graphite:8080", Type: models.DS_GRAPHITE}
		ctx := &models.ReqContext{}

		secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
		dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
		proxy, err := NewDataSourceProxy(ds, routes, ctx, "/render", &setting.Cfg{BuildVersion: "5.3.0"}, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
		require.NoError(t, err)
		req, err := http.NewRequest(http.MethodGet, "http://grafana.com/sub", nil)
		require.NoError(t, err)

		proxy.director(req)

		t.Run("Can translate request URL and path", func(t *testing.T) {
			assert.Equal(t, "graphite:8080", req.URL.Host)
			assert.Equal(t, "/render", req.URL.Path)
		})
	})

	t.Run("When proxying InfluxDB", func(t *testing.T) {
		ds := &models.DataSource{
			Type:     models.DS_INFLUXDB_08,
			Url:      "http://influxdb:8083",
			Database: "site",
			User:     "user",
			Password: "password",
		}

		ctx := &models.ReqContext{}
		var routes []*plugins.Route
		secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
		dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
		proxy, err := NewDataSourceProxy(ds, routes, ctx, "", &setting.Cfg{}, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
		require.NoError(t, err)

		req, err := http.NewRequest(http.MethodGet, "http://grafana.com/sub", nil)
		require.NoError(t, err)

		proxy.director(req)
		assert.Equal(t, "/db/site/", req.URL.Path)
	})

	t.Run("When proxying a data source with no keepCookies specified", func(t *testing.T) {
		json, err := simplejson.NewJson([]byte(`{"keepCookies": []}`))
		require.NoError(t, err)

		ds := &models.DataSource{
			Type:     models.DS_GRAPHITE,
			Url:      "http://graphite:8086",
			JsonData: json,
		}

		ctx := &models.ReqContext{}
		var routes []*plugins.Route
		secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
		dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
		proxy, err := NewDataSourceProxy(ds, routes, ctx, "", &setting.Cfg{}, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
		require.NoError(t, err)

		requestURL, err := url.Parse("http://grafana.com/sub")
		require.NoError(t, err)
		req := http.Request{URL: requestURL, Header: make(http.Header)}
		cookies := "grafana_user=admin; grafana_remember=99; grafana_sess=11; JSESSION_ID=test"
		req.Header.Set("Cookie", cookies)

		proxy.director(&req)

		assert.Equal(t, "", req.Header.Get("Cookie"))
	})

	t.Run("When proxying a data source with keep cookies specified", func(t *testing.T) {
		json, err := simplejson.NewJson([]byte(`{"keepCookies": ["JSESSION_ID"]}`))
		require.NoError(t, err)

		ds := &models.DataSource{
			Type:     models.DS_GRAPHITE,
			Url:      "http://graphite:8086",
			JsonData: json,
		}

		ctx := &models.ReqContext{}
		var pluginRoutes []*plugins.Route
		secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
		dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
		proxy, err := NewDataSourceProxy(ds, pluginRoutes, ctx, "", &setting.Cfg{}, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
		require.NoError(t, err)

		requestURL, err := url.Parse("http://grafana.com/sub")
		require.NoError(t, err)
		req := http.Request{URL: requestURL, Header: make(http.Header)}
		cookies := "grafana_user=admin; grafana_remember=99; grafana_sess=11; JSESSION_ID=test"
		req.Header.Set("Cookie", cookies)

		proxy.director(&req)

		assert.Equal(t, "JSESSION_ID=test", req.Header.Get("Cookie"))
	})

	t.Run("When proxying a custom datasource", func(t *testing.T) {
		ds := &models.DataSource{
			Type: "custom-datasource",
			Url:  "http://host/root/",
		}
		ctx := &models.ReqContext{}
		var routes []*plugins.Route
		secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
		dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
		proxy, err := NewDataSourceProxy(ds, routes, ctx, "/path/to/folder/", &setting.Cfg{}, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
		require.NoError(t, err)
		req, err := http.NewRequest(http.MethodGet, "http://grafana.com/sub", nil)
		req.Header.Set("Origin", "grafana.com")
		req.Header.Set("Referer", "grafana.com")
		req.Header.Set("X-Canary", "stillthere")
		require.NoError(t, err)

		proxy.director(req)

		assert.Equal(t, "http://host/root/path/to/folder/", req.URL.String())

		assert.Empty(t, req.Header.Get("Origin"))
		assert.Empty(t, req.Header.Get("Referer"))
		assert.Equal(t, "stillthere", req.Header.Get("X-Canary"))
	})

	t.Run("When proxying a datasource that has OAuth token pass-through enabled", func(t *testing.T) {
		bus.AddHandler("test", func(ctx context.Context, query *models.GetAuthInfoQuery) error {
			query.Result = &models.UserAuth{
				Id:                1,
				UserId:            1,
				AuthModule:        "generic_oauth",
				OAuthAccessToken:  "testtoken",
				OAuthRefreshToken: "testrefreshtoken",
				OAuthTokenType:    "Bearer",
				OAuthExpiry:       time.Now().AddDate(0, 0, 1),
			}
			return nil
		})

		ds := &models.DataSource{
			Type: "custom-datasource",
			Url:  "http://host/root/",
			JsonData: simplejson.NewFromAny(map[string]interface{}{
				"oauthPassThru": true,
			}),
		}

		req, err := http.NewRequest("GET", "http://localhost/asd", nil)
		require.NoError(t, err)
		ctx := &models.ReqContext{
			SignedInUser: &models.SignedInUser{UserId: 1},
			Context:      &web.Context{Req: req},
		}

		token := &oauth2.Token{
			AccessToken:  "testtoken",
			RefreshToken: "testrefreshtoken",
			TokenType:    "Bearer",
			Expiry:       time.Now().AddDate(0, 0, 1),
		}
		extra := map[string]interface{}{
			"id_token": "testidtoken",
		}
		token = token.WithExtra(extra)
		mockAuthToken := mockOAuthTokenService{
			token:        token,
			oAuthEnabled: true,
		}

		var routes []*plugins.Route
		secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
		dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
		proxy, err := NewDataSourceProxy(ds, routes, ctx, "/path/to/folder/", &setting.Cfg{}, httpClientProvider, &mockAuthToken, dsService, tracer)
		require.NoError(t, err)
		req, err = http.NewRequest(http.MethodGet, "http://grafana.com/sub", nil)
		require.NoError(t, err)

		proxy.director(req)

		assert.Equal(t, "Bearer testtoken", req.Header.Get("Authorization"))
		assert.Equal(t, "testidtoken", req.Header.Get("X-ID-Token"))
	})

	t.Run("When SendUserHeader config is enabled", func(t *testing.T) {
		req := getDatasourceProxiedRequest(
			t,
			&models.ReqContext{
				SignedInUser: &models.SignedInUser{
					Login: "test_user",
				},
			},
			&setting.Cfg{SendUserHeader: true},
		)
		assert.Equal(t, "test_user", req.Header.Get("X-Grafana-User"))
	})

	t.Run("When SendUserHeader config is disabled", func(t *testing.T) {
		req := getDatasourceProxiedRequest(
			t,
			&models.ReqContext{
				SignedInUser: &models.SignedInUser{
					Login: "test_user",
				},
			},
			&setting.Cfg{SendUserHeader: false},
		)
		// Get will return empty string even if header is not set
		assert.Empty(t, req.Header.Get("X-Grafana-User"))
	})

	t.Run("When SendUserHeader config is enabled but user is anonymous", func(t *testing.T) {
		req := getDatasourceProxiedRequest(
			t,
			&models.ReqContext{
				SignedInUser: &models.SignedInUser{IsAnonymous: true},
			},
			&setting.Cfg{SendUserHeader: true},
		)
		// Get will return empty string even if header is not set
		assert.Empty(t, req.Header.Get("X-Grafana-User"))
	})

	t.Run("When proxying data source proxy should handle authentication", func(t *testing.T) {
		secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())

		tests := []*testCase{
			createAuthTest(t, secretsService, models.DS_INFLUXDB_08, "http://localhost:9090", authTypePassword, authCheckQuery, false),
			createAuthTest(t, secretsService, models.DS_INFLUXDB_08, "http://localhost:9090", authTypePassword, authCheckQuery, true),
			createAuthTest(t, secretsService, models.DS_INFLUXDB, "http://localhost:9090", authTypePassword, authCheckHeader, true),
			createAuthTest(t, secretsService, models.DS_INFLUXDB, "http://localhost:9090", authTypePassword, authCheckHeader, false),
			createAuthTest(t, secretsService, models.DS_INFLUXDB, "http://localhost:9090", authTypeBasic, authCheckHeader, true),
			createAuthTest(t, secretsService, models.DS_INFLUXDB, "http://localhost:9090", authTypeBasic, authCheckHeader, false),

			// These two should be enough for any other datasource at the moment. Proxy has special handling
			// only for Influx, others have the same path and only BasicAuth. Non BasicAuth datasources
			// do not go through proxy but through TSDB API which is not tested here.
			createAuthTest(t, secretsService, models.DS_ES, "http://localhost:9200", authTypeBasic, authCheckHeader, false),
			createAuthTest(t, secretsService, models.DS_ES, "http://localhost:9200", authTypeBasic, authCheckHeader, true),
		}
		for _, test := range tests {
			runDatasourceAuthTest(t, secretsService, test)
		}
	})
}

// test DataSourceProxy request handling.
func TestDataSourceProxy_requestHandling(t *testing.T) {
	httpClientProvider := httpclient.NewProvider()
	var writeErr error

	type setUpCfg struct {
		headers map[string]string
		writeCb func(w http.ResponseWriter, r *http.Request)
	}

	setUp := func(t *testing.T, cfgs ...setUpCfg) (*models.ReqContext, *models.DataSource) {
		writeErr = nil

		backend := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			http.SetCookie(w, &http.Cookie{Name: "flavor", Value: "chocolateChip"})
			written := false
			for _, cfg := range cfgs {
				if cfg.writeCb != nil {
					t.Log("Writing response via callback")
					cfg.writeCb(w, r)
					written = true
				}
			}
			if !written {
				t.Log("Writing default response")
				w.WriteHeader(200)
				_, writeErr = w.Write([]byte("I am the backend"))
			}
		}))
		t.Cleanup(backend.Close)

		ds := &models.DataSource{Url: backend.URL, Type: models.DS_GRAPHITE}

		responseWriter := web.NewResponseWriter("GET", httptest.NewRecorder())

		// XXX: Really unsure why, but setting headers within the HTTP handler function doesn't stick,
		// so doing it here instead
		for _, cfg := range cfgs {
			for k, v := range cfg.headers {
				responseWriter.Header().Set(k, v)
			}
		}

		return &models.ReqContext{
			SignedInUser: &models.SignedInUser{},
			Context: &web.Context{
				Req:  httptest.NewRequest("GET", "/render", nil),
				Resp: responseWriter,
			},
		}, ds
	}

	tracer, err := tracing.InitializeTracerForTest()
	require.NoError(t, err)

	t.Run("When response header Set-Cookie is not set should remove proxied Set-Cookie header", func(t *testing.T) {
		ctx, ds := setUp(t)
		var routes []*plugins.Route
		secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
		dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
		proxy, err := NewDataSourceProxy(ds, routes, ctx, "/render", &setting.Cfg{}, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
		require.NoError(t, err)

		proxy.HandleRequest()

		require.NoError(t, writeErr)
		assert.Empty(t, proxy.ctx.Resp.Header().Get("Set-Cookie"))
	})

	t.Run("When response header Set-Cookie is set should remove proxied Set-Cookie header and restore the original Set-Cookie header", func(t *testing.T) {
		ctx, ds := setUp(t, setUpCfg{
			headers: map[string]string{
				"Set-Cookie": "important_cookie=important_value",
			},
		})
		var routes []*plugins.Route
		secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
		dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
		proxy, err := NewDataSourceProxy(ds, routes, ctx, "/render", &setting.Cfg{}, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
		require.NoError(t, err)

		proxy.HandleRequest()

		require.NoError(t, writeErr)
		assert.Equal(t, "important_cookie=important_value", proxy.ctx.Resp.Header().Get("Set-Cookie"))
	})

	t.Run("Data source returns status code 401", func(t *testing.T) {
		ctx, ds := setUp(t, setUpCfg{
			writeCb: func(w http.ResponseWriter, r *http.Request) {
				w.WriteHeader(401)
				w.Header().Set("www-authenticate", `Basic realm="Access to the server"`)
				_, err := w.Write([]byte("Not authenticated"))
				require.NoError(t, err)
				t.Log("Wrote 401 response")
			},
		})
		var routes []*plugins.Route
		secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
		dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
		proxy, err := NewDataSourceProxy(ds, routes, ctx, "/render", &setting.Cfg{}, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
		require.NoError(t, err)

		proxy.HandleRequest()

		require.NoError(t, writeErr)
		assert.Equal(t, 400, proxy.ctx.Resp.Status(), "Status code 401 should be converted to 400")
		assert.Empty(t, proxy.ctx.Resp.Header().Get("www-authenticate"))
	})

	t.Run("Data source should handle proxy path url encoding correctly", func(t *testing.T) {
		var req *http.Request
		ctx, ds := setUp(t, setUpCfg{
			writeCb: func(w http.ResponseWriter, r *http.Request) {
				req = r
				w.WriteHeader(200)
				_, err := w.Write([]byte("OK"))
				require.NoError(t, err)
			},
		})

		ctx.Req = httptest.NewRequest("GET", "/api/datasources/proxy/1/path/%2Ftest%2Ftest%2F?query=%2Ftest%2Ftest%2F", nil)
		var routes []*plugins.Route
		secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
		dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
		proxy, err := NewDataSourceProxy(ds, routes, ctx, "/path/%2Ftest%2Ftest%2F", &setting.Cfg{}, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
		require.NoError(t, err)

		proxy.HandleRequest()

		require.NoError(t, writeErr)
		require.NotNil(t, req)
		require.Equal(t, "/path/%2Ftest%2Ftest%2F?query=%2Ftest%2Ftest%2F", req.RequestURI)
	})
	t.Run("Data source should handle proxy path url encoding correctly with opentelemetry", func(t *testing.T) {
		var req *http.Request
		ctx, ds := setUp(t, setUpCfg{
			writeCb: func(w http.ResponseWriter, r *http.Request) {
				req = r
				w.WriteHeader(200)
				_, err := w.Write([]byte("OK"))
				require.NoError(t, err)
			},
		})

		ctx.Req = httptest.NewRequest("GET", "/api/datasources/proxy/1/path/%2Ftest%2Ftest%2F?query=%2Ftest%2Ftest%2F", nil)
		var routes []*plugins.Route
		secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
		dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
		proxy, err := NewDataSourceProxy(ds, routes, ctx, "/path/%2Ftest%2Ftest%2F", &setting.Cfg{}, httpClientProvider, &oauthtoken.Service{}, dsService, tracer)
		require.NoError(t, err)

		proxy.HandleRequest()
		require.NoError(t, writeErr)
		require.NotNil(t, req)
		require.Equal(t, "/path/%2Ftest%2Ftest%2F?query=%2Ftest%2Ftest%2F", req.RequestURI)
	})
}

func TestNewDataSourceProxy_InvalidURL(t *testing.T) {
	ctx := models.ReqContext{
		Context:      &web.Context{},
		SignedInUser: &models.SignedInUser{OrgRole: models.ROLE_EDITOR},
	}
	ds := models.DataSource{
		Type: "test",
		Url:  "://host/root",
	}
	cfg := setting.Cfg{}
	tracer, err := tracing.InitializeTracerForTest()
	require.NoError(t, err)
	var routes []*plugins.Route
	secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
	dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
	_, err = NewDataSourceProxy(&ds, routes, &ctx, "api/method", &cfg, httpclient.NewProvider(), &oauthtoken.Service{}, dsService, tracer)
	require.Error(t, err)
	assert.True(t, strings.HasPrefix(err.Error(), `validation of data source URL "://host/root" failed`))
}

func TestNewDataSourceProxy_ProtocolLessURL(t *testing.T) {
	ctx := models.ReqContext{
		Context:      &web.Context{},
		SignedInUser: &models.SignedInUser{OrgRole: models.ROLE_EDITOR},
	}
	ds := models.DataSource{
		Type: "test",
		Url:  "127.0.01:5432",
	}
	cfg := setting.Cfg{}
	tracer, err := tracing.InitializeTracerForTest()
	require.NoError(t, err)

	var routes []*plugins.Route
	secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
	dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
	_, err = NewDataSourceProxy(&ds, routes, &ctx, "api/method", &cfg, httpclient.NewProvider(), &oauthtoken.Service{}, dsService, tracer)

	require.NoError(t, err)
}

// Test wth MSSQL type data sources.
func TestNewDataSourceProxy_MSSQL(t *testing.T) {
	ctx := models.ReqContext{
		Context:      &web.Context{},
		SignedInUser: &models.SignedInUser{OrgRole: models.ROLE_EDITOR},
	}
	tracer, err := tracing.InitializeTracerForTest()
	require.NoError(t, err)

	tcs := []struct {
		description string
		url         string
		err         error
	}{
		{
			description: "Valid ODBC URL",
			url:         `localhost\instance:1433`,
		},
		{
			description: "Invalid ODBC URL",
			url:         `localhost\instance::1433`,
			err: datasource.URLValidationError{
				Err: fmt.Errorf(`unrecognized MSSQL URL format: "localhost\\instance::1433"`),
				URL: `localhost\instance::1433`,
			},
		},
	}
	for _, tc := range tcs {
		t.Run(tc.description, func(t *testing.T) {
			cfg := setting.Cfg{}
			ds := models.DataSource{
				Type: "mssql",
				Url:  tc.url,
			}

			var routes []*plugins.Route
			secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
			dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
			p, err := NewDataSourceProxy(&ds, routes, &ctx, "api/method", &cfg, httpclient.NewProvider(), &oauthtoken.Service{}, dsService, tracer)
			if tc.err == nil {
				require.NoError(t, err)
				assert.Equal(t, &url.URL{
					Scheme: "sqlserver",
					Host:   ds.Url,
				}, p.targetUrl)
			} else {
				require.Error(t, err)
				assert.Equal(t, tc.err, err)
			}
		})
	}
}

// getDatasourceProxiedRequest is a helper for easier setup of tests based on global config and ReqContext.
func getDatasourceProxiedRequest(t *testing.T, ctx *models.ReqContext, cfg *setting.Cfg) *http.Request {
	ds := &models.DataSource{
		Type: "custom",
		Url:  "http://host/root/",
	}
	tracer, err := tracing.InitializeTracerForTest()
	require.NoError(t, err)

	var routes []*plugins.Route
	secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
	dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
	proxy, err := NewDataSourceProxy(ds, routes, ctx, "", cfg, httpclient.NewProvider(), &oauthtoken.Service{}, dsService, tracer)
	require.NoError(t, err)
	req, err := http.NewRequest(http.MethodGet, "http://grafana.com/sub", nil)
	require.NoError(t, err)

	proxy.director(req)
	return req
}

type httpClientStub struct {
	t        *testing.T
	fakeBody []byte
}

func (c *httpClientStub) Do(req *http.Request) (*http.Response, error) {
	bodyJSON, err := simplejson.NewJson(c.fakeBody)
	require.NoError(c.t, err)
	_, passedTokenCacheTest := bodyJSON.CheckGet("expires_on")
	require.True(c.t, passedTokenCacheTest)

	bodyJSON.Set("expires_on", fmt.Sprint(time.Now().Add(time.Second*60).Unix()))
	body, err := bodyJSON.MarshalJSON()
	require.NoError(c.t, err)
	resp := &http.Response{
		Body: ioutil.NopCloser(bytes.NewReader(body)),
	}

	return resp, nil
}

func newFakeHTTPClient(t *testing.T, fakeBody []byte) httpClient {
	return &httpClientStub{
		t:        t,
		fakeBody: fakeBody,
	}
}

type testCase struct {
	datasource *models.DataSource
	checkReq   func(req *http.Request)
}

const (
	authTypePassword = "password"
	authTypeBasic    = "basic"
)

const (
	authCheckQuery  = "query"
	authCheckHeader = "header"
)

func createAuthTest(t *testing.T, secretsService secrets.Service, dsType string, url string, authType string, authCheck string, useSecureJsonData bool) *testCase {
	ctx := context.Background()

	// Basic user:password
	base64AuthHeader := "Basic dXNlcjpwYXNzd29yZA=="

	test := &testCase{
		datasource: &models.DataSource{
			Id:       1,
			Type:     dsType,
			JsonData: simplejson.New(),
			Url:      url,
		},
	}
	var message string
	var err error
	if authType == authTypePassword {
		message = fmt.Sprintf("%v should add username and password", dsType)
		test.datasource.User = "user"
		if useSecureJsonData {
			test.datasource.SecureJsonData, err = secretsService.EncryptJsonData(
				ctx,
				map[string]string{
					"password": "password",
				}, secrets.WithoutScope())
		} else {
			test.datasource.Password = "password"
		}
	} else {
		message = fmt.Sprintf("%v should add basic auth username and password", dsType)
		test.datasource.BasicAuth = true
		test.datasource.BasicAuthUser = "user"
		if useSecureJsonData {
			test.datasource.SecureJsonData, err = secretsService.EncryptJsonData(
				ctx,
				map[string]string{
					"basicAuthPassword": "password",
				}, secrets.WithoutScope())
		} else {
			test.datasource.BasicAuthPassword = "password"
		}
	}
	require.NoError(t, err)

	if useSecureJsonData {
		message += " from securejsondata"
	}

	if authCheck == authCheckQuery {
		message += " to query params"
		test.checkReq = func(req *http.Request) {
			queryVals := req.URL.Query()
			assert.Equal(t, "user", queryVals["u"][0], message)
			assert.Equal(t, "password", queryVals["p"][0], message)
		}
	} else {
		message += " to auth header"
		test.checkReq = func(req *http.Request) {
			assert.Equal(t, base64AuthHeader, req.Header.Get("Authorization"), message)
		}
	}

	return test
}

func runDatasourceAuthTest(t *testing.T, secretsService secrets.Service, test *testCase) {
	ctx := &models.ReqContext{}
	tracer, err := tracing.InitializeTracerForTest()
	require.NoError(t, err)

	var routes []*plugins.Route
	dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
	proxy, err := NewDataSourceProxy(test.datasource, routes, ctx, "", &setting.Cfg{}, httpclient.NewProvider(), &oauthtoken.Service{}, dsService, tracer)
	require.NoError(t, err)

	req, err := http.NewRequest(http.MethodGet, "http://grafana.com/sub", nil)
	require.NoError(t, err)

	proxy.director(req)

	test.checkReq(req)
}

func Test_PathCheck(t *testing.T) {
	// Ensure that we test routes appropriately. This test reproduces a historical bug where two routes were defined with different role requirements but the same method and the more privileged route was tested first. Here we ensure auth checks are applied based on the correct route, not just the method.
	routes := []*plugins.Route{
		{
			Path:    "a",
			URL:     "https://www.google.com",
			ReqRole: models.ROLE_EDITOR,
			Method:  http.MethodGet,
		},
		{
			Path:    "b",
			URL:     "https://www.google.com",
			ReqRole: models.ROLE_VIEWER,
			Method:  http.MethodGet,
		},
	}
	tracer, err := tracing.InitializeTracerForTest()
	require.NoError(t, err)

	setUp := func() (*models.ReqContext, *http.Request) {
		req, err := http.NewRequest("GET", "http://localhost/asd", nil)
		require.NoError(t, err)
		ctx := &models.ReqContext{
			Context:      &web.Context{Req: req},
			SignedInUser: &models.SignedInUser{OrgRole: models.ROLE_VIEWER},
		}
		return ctx, req
	}
	ctx, _ := setUp()
	secretsService := secretsManager.SetupTestService(t, fakes.NewFakeSecretsStore())
	dsService := datasources.ProvideService(bus.New(), nil, secretsService, &acmock.Mock{})
	proxy, err := NewDataSourceProxy(&models.DataSource{}, routes, ctx, "b", &setting.Cfg{}, httpclient.NewProvider(), &oauthtoken.Service{}, dsService, tracer)
	require.NoError(t, err)

	require.Nil(t, proxy.validateRequest())
	require.Equal(t, routes[1], proxy.matchedRoute)
}

type mockOAuthTokenService struct {
	token        *oauth2.Token
	oAuthEnabled bool
}

func (m *mockOAuthTokenService) GetCurrentOAuthToken(ctx context.Context, user *models.SignedInUser) *oauth2.Token {
	return m.token
}

func (m *mockOAuthTokenService) IsOAuthPassThruEnabled(ds *models.DataSource) bool {
	return m.oAuthEnabled
}