package api

import (
	"encoding/json"
	"errors"
	"fmt"
	"net/http"
	"strings"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/mock"
	"github.com/stretchr/testify/require"

	"github.com/grafana/grafana/pkg/services/dashboards"
	"github.com/grafana/grafana/pkg/services/featuremgmt"
	"github.com/grafana/grafana/pkg/services/org"
	"github.com/grafana/grafana/pkg/services/publicdashboards"
	. "github.com/grafana/grafana/pkg/services/publicdashboards/models"
	"github.com/grafana/grafana/pkg/services/user"
	"github.com/grafana/grafana/pkg/setting"
	"github.com/grafana/grafana/pkg/util/errutil"
)

var userNoRBACPerms = &user.SignedInUser{UserID: 1, OrgID: 1, OrgRole: org.RoleAdmin, Login: "testAdminUserNoRBACPerms"}
var userAdmin = &user.SignedInUser{UserID: 2, OrgID: 1, OrgRole: org.RoleAdmin, Login: "testAdminUserRBAC", Permissions: map[int64]map[string][]string{1: {dashboards.ActionDashboardsPublicWrite: {dashboards.ScopeDashboardsAll}}}}
var userViewer = &user.SignedInUser{UserID: 4, OrgID: 1, OrgRole: org.RoleViewer, Login: "testViewerUserRBAC", Permissions: map[int64]map[string][]string{1: {dashboards.ActionDashboardsRead: {dashboards.ScopeDashboardsAll}}}}
var anonymousUser = &user.SignedInUser{IsAnonymous: true}

type JsonErrResponse struct {
	Error string `json:"error"`
}

func TestAPIFeatureFlag(t *testing.T) {
	testCases := []struct {
		Name   string
		Method string
		Path   string
	}{
		{
			Name:   "API: Load Dashboard",
			Method: http.MethodGet,
			Path:   "/api/public/dashboards/acbc123",
		},
		{
			Name:   "API: Query Dashboard",
			Method: http.MethodGet,
			Path:   "/api/public/dashboards/abc123/panels/2/query",
		},
		{
			Name:   "API: List Dashboards",
			Method: http.MethodGet,
			Path:   "/api/dashboards/public-dashboards",
		},
		{
			Name:   "API: Get Public Dashboard",
			Method: http.MethodPost,
			Path:   "/api/dashboards/uid/abc123/public-dashboards",
		},
		{
			Name:   "API: Create Public Dashboard",
			Method: http.MethodPost,
			Path:   "/api/dashboards/uid/abc123/public-dashboards",
		},
		{
			Name:   "API: Update Public Dashboard",
			Method: http.MethodPut,
			Path:   "/api/dashboards/uid/abc123/public-dashboards",
		},
		{
			Name:   "API: Delete Public Dashboard",
			Method: http.MethodDelete,
			Path:   "/api/dashboards/uid/:dashboardUid/public-dashboards/:uid",
		},
	}

	for _, test := range testCases {
		t.Run(test.Name, func(t *testing.T) {
			cfg := setting.NewCfg()
			service := publicdashboards.NewFakePublicDashboardService(t)
			features := featuremgmt.WithFeatures()
			testServer := setupTestServer(t, cfg, features, service, nil, userAdmin)
			response := callAPI(testServer, test.Method, test.Path, nil, t)
			assert.Equal(t, http.StatusNotFound, response.Code)
		})
	}
}

func TestAPIListPublicDashboard(t *testing.T) {
	successResp := &PublicDashboardListResponseWithPagination{
		PublicDashboards: []*PublicDashboardListResponse{
			{
				Uid:          "1234asdfasdf",
				AccessToken:  "asdfasdf",
				DashboardUid: "abc1234",
				IsEnabled:    true,
			},
		},
	}

	testCases := []struct {
		Name                 string
		User                 *user.SignedInUser
		Response             *PublicDashboardListResponseWithPagination
		ResponseErr          error
		ExpectedHttpResponse int
	}{
		{
			Name:                 "Anonymous user cannot list dashboards",
			User:                 anonymousUser,
			Response:             successResp,
			ResponseErr:          nil,
			ExpectedHttpResponse: http.StatusUnauthorized,
		},
		{
			Name:                 "User viewer can see public dashboards",
			User:                 userViewer,
			Response:             successResp,
			ResponseErr:          nil,
			ExpectedHttpResponse: http.StatusOK,
		},
		{
			Name:                 "Handles Service error",
			User:                 userViewer,
			Response:             nil,
			ResponseErr:          ErrInternalServerError.Errorf(""),
			ExpectedHttpResponse: http.StatusInternalServerError,
		},
	}

	for _, test := range testCases {
		t.Run(test.Name, func(t *testing.T) {
			service := publicdashboards.NewFakePublicDashboardService(t)
			service.On("FindAllWithPagination", mock.Anything, mock.Anything, mock.Anything).
				Return(test.Response, test.ResponseErr).Maybe()

			cfg := setting.NewCfg()
			features := featuremgmt.WithFeatures(featuremgmt.FlagPublicDashboards)
			testServer := setupTestServer(t, cfg, features, service, nil, test.User)

			response := callAPI(testServer, http.MethodGet, "/api/dashboards/public-dashboards", nil, t)
			assert.Equal(t, test.ExpectedHttpResponse, response.Code)

			if test.ExpectedHttpResponse == http.StatusOK {
				var jsonResp PublicDashboardListResponseWithPagination
				err := json.Unmarshal(response.Body.Bytes(), &jsonResp)
				require.NoError(t, err)
				assert.Equal(t, jsonResp.PublicDashboards[0].Uid, "1234asdfasdf")
			}

			if test.ResponseErr != nil {
				var errResp errutil.PublicError
				err := json.Unmarshal(response.Body.Bytes(), &errResp)
				require.NoError(t, err)
				assert.Equal(t, "Internal server error", errResp.Message)
				assert.Equal(t, "publicdashboards.internalServerError", errResp.MessageID)
				service.AssertNotCalled(t, "FindAllWithPagination")
			}
		})
	}
}

func TestAPIDeletePublicDashboard(t *testing.T) {
	dashboardUid := "abc1234"
	publicDashboardUid := "1234asdfasdf"
	userEditorAllPublicDashboard := &user.SignedInUser{UserID: 4, OrgID: 1, OrgRole: org.RoleEditor, Login: "testEditorUser", Permissions: map[int64]map[string][]string{1: {dashboards.ActionDashboardsPublicWrite: {dashboards.ScopeDashboardsAll}}}}
	userEditorAnotherPublicDashboard := &user.SignedInUser{UserID: 4, OrgID: 1, OrgRole: org.RoleEditor, Login: "testEditorUser", Permissions: map[int64]map[string][]string{1: {dashboards.ActionDashboardsPublicWrite: {"another-uid"}}}}
	userEditorPublicDashboard := &user.SignedInUser{UserID: 4, OrgID: 1, OrgRole: org.RoleEditor, Login: "testEditorUser", Permissions: map[int64]map[string][]string{1: {dashboards.ActionDashboardsPublicWrite: {fmt.Sprintf("dashboards:uid:%s", dashboardUid)}}}}

	testCases := []struct {
		Name                    string
		User                    *user.SignedInUser
		DashboardUid            string
		PublicDashboardUid      string
		ResponseErr             error
		ExpectedHttpResponse    int
		ExpectedMessageResponse string
		ShouldCallService       bool
	}{
		{
			Name:                 "User viewer cannot delete public dashboard",
			User:                 userViewer,
			DashboardUid:         dashboardUid,
			PublicDashboardUid:   publicDashboardUid,
			ResponseErr:          nil,
			ExpectedHttpResponse: http.StatusForbidden,
			ShouldCallService:    false,
		},
		{
			Name:                 "User editor without specific dashboard access cannot delete public dashboard",
			User:                 userEditorAnotherPublicDashboard,
			DashboardUid:         dashboardUid,
			PublicDashboardUid:   publicDashboardUid,
			ResponseErr:          nil,
			ExpectedHttpResponse: http.StatusForbidden,
			ShouldCallService:    false,
		},
		{
			Name:                 "User editor with all dashboard accesses can delete public dashboard",
			User:                 userEditorAllPublicDashboard,
			DashboardUid:         dashboardUid,
			PublicDashboardUid:   publicDashboardUid,
			ResponseErr:          nil,
			ExpectedHttpResponse: http.StatusOK,
			ShouldCallService:    true,
		},
		{
			Name:                 "User editor with dashboard access can delete public dashboard",
			User:                 userEditorPublicDashboard,
			DashboardUid:         dashboardUid,
			PublicDashboardUid:   publicDashboardUid,
			ResponseErr:          nil,
			ExpectedHttpResponse: http.StatusOK,
			ShouldCallService:    true,
		},
		{
			Name:                    "Internal server error returns an error",
			User:                    userEditorPublicDashboard,
			DashboardUid:            dashboardUid,
			PublicDashboardUid:      publicDashboardUid,
			ResponseErr:             ErrInternalServerError.Errorf(""),
			ExpectedHttpResponse:    ErrInternalServerError.Errorf("").Reason.Status().HTTPStatus(),
			ExpectedMessageResponse: ErrInternalServerError.Errorf("").PublicMessage,
			ShouldCallService:       true,
		},
		{
			Name:                    "PublicDashboard error returns correct status code instead of 500",
			User:                    userEditorPublicDashboard,
			DashboardUid:            dashboardUid,
			PublicDashboardUid:      publicDashboardUid,
			ResponseErr:             ErrPublicDashboardIdentifierNotSet.Errorf(""),
			ExpectedHttpResponse:    ErrPublicDashboardIdentifierNotSet.Errorf("").Reason.Status().HTTPStatus(),
			ExpectedMessageResponse: ErrPublicDashboardIdentifierNotSet.Errorf("").PublicMessage,
			ShouldCallService:       true,
		},
		{
			Name:                 "Invalid publicDashboardUid throws an error",
			User:                 userEditorPublicDashboard,
			DashboardUid:         dashboardUid,
			PublicDashboardUid:   "inv@lid-publicd@shboard-uid!",
			ResponseErr:          nil,
			ExpectedHttpResponse: http.StatusBadRequest,
			ShouldCallService:    false,
		},
		{
			Name:                    "Public dashboard uid does not exist",
			User:                    userEditorPublicDashboard,
			DashboardUid:            dashboardUid,
			PublicDashboardUid:      "UIDDOESNOTEXIST",
			ResponseErr:             ErrPublicDashboardNotFound.Errorf(""),
			ExpectedHttpResponse:    ErrPublicDashboardNotFound.Errorf("").Reason.Status().HTTPStatus(),
			ExpectedMessageResponse: ErrPublicDashboardNotFound.Errorf("").PublicMessage,
			ShouldCallService:       true,
		},
	}

	for _, test := range testCases {
		t.Run(test.Name, func(t *testing.T) {
			service := publicdashboards.NewFakePublicDashboardService(t)

			if test.ShouldCallService {
				service.On("Delete", mock.Anything, mock.Anything, mock.Anything).
					Return(test.ResponseErr)
			}

			cfg := setting.NewCfg()

			features := featuremgmt.WithFeatures(featuremgmt.FlagPublicDashboards)
			testServer := setupTestServer(t, cfg, features, service, nil, test.User)

			response := callAPI(testServer, http.MethodDelete, fmt.Sprintf("/api/dashboards/uid/%s/public-dashboards/%s", test.DashboardUid, test.PublicDashboardUid), nil, t)
			assert.Equal(t, test.ExpectedHttpResponse, response.Code)

			if test.ExpectedHttpResponse == http.StatusOK {
				var jsonResp any
				err := json.Unmarshal(response.Body.Bytes(), &jsonResp)
				require.NoError(t, err)
				assert.Equal(t, jsonResp, nil)
			}

			if !test.ShouldCallService {
				service.AssertNotCalled(t, "Delete")
			}

			if test.ResponseErr != nil {
				var errResp errutil.PublicError
				err := json.Unmarshal(response.Body.Bytes(), &errResp)
				require.NoError(t, err)
				assert.Equal(t, test.ExpectedHttpResponse, errResp.StatusCode)
				assert.Equal(t, test.ExpectedMessageResponse, errResp.Message)
			}
		})
	}
}

func TestAPIGetPublicDashboard(t *testing.T) {
	pubdash := &PublicDashboard{IsEnabled: true}

	testCases := []struct {
		Name                  string
		DashboardUid          string
		ExpectedHttpResponse  int
		PublicDashboardResult *PublicDashboard
		PublicDashboardErr    error
		User                  *user.SignedInUser
		ShouldCallService     bool
	}{
		{
			Name:                  "returns 404 when dashboard not found",
			DashboardUid:          "77777",
			ExpectedHttpResponse:  http.StatusNotFound,
			PublicDashboardResult: nil,
			PublicDashboardErr:    ErrDashboardNotFound.Errorf(""),
			User:                  userViewer,
			ShouldCallService:     true,
		},
		{
			Name:                  "returns 500 when internal server error",
			DashboardUid:          "1",
			ExpectedHttpResponse:  http.StatusInternalServerError,
			PublicDashboardResult: nil,
			PublicDashboardErr:    errors.New("database broken"),
			User:                  userViewer,
			ShouldCallService:     true,
		},
		{
			Name:                  "retrieves public dashboard when dashboard is found RBAC on",
			DashboardUid:          "1",
			ExpectedHttpResponse:  http.StatusOK,
			PublicDashboardResult: pubdash,
			PublicDashboardErr:    nil,
			User:                  userViewer,
			ShouldCallService:     true,
		},
		{
			Name:                  "returns 403 when no permissions RBAC on",
			ExpectedHttpResponse:  http.StatusForbidden,
			PublicDashboardResult: pubdash,
			PublicDashboardErr:    nil,
			User:                  userNoRBACPerms,
			ShouldCallService:     false,
		},
	}

	for _, test := range testCases {
		t.Run(test.Name, func(t *testing.T) {
			service := publicdashboards.NewFakePublicDashboardService(t)

			if test.ShouldCallService {
				service.On("FindByDashboardUid", mock.Anything, mock.AnythingOfType("int64"), mock.AnythingOfType("string")).
					Return(test.PublicDashboardResult, test.PublicDashboardErr)
			}

			cfg := setting.NewCfg()

			testServer := setupTestServer(
				t,
				cfg,
				featuremgmt.WithFeatures(featuremgmt.FlagPublicDashboards),
				service,
				nil,
				test.User,
			)

			response := callAPI(
				testServer,
				http.MethodGet,
				"/api/dashboards/uid/1/public-dashboards",
				nil,
				t,
			)

			assert.Equal(t, test.ExpectedHttpResponse, response.Code)

			if response.Code == http.StatusOK {
				var pdcResp PublicDashboard
				err := json.Unmarshal(response.Body.Bytes(), &pdcResp)
				require.NoError(t, err)
				assert.Equal(t, test.PublicDashboardResult, &pdcResp)
			}
		})
	}
}

func TestApiCreatePublicDashboard(t *testing.T) {
	testCases := []struct {
		Name                 string
		DashboardUid         string
		publicDashboard      *PublicDashboard
		ExpectedHttpResponse int
		SaveDashboardErr     error
		User                 *user.SignedInUser
		ShouldCallService    bool
		JsonBody             string
	}{
		{
			Name:                 "returns 500 when not persisted",
			ExpectedHttpResponse: http.StatusInternalServerError,
			publicDashboard:      &PublicDashboard{},
			SaveDashboardErr:     ErrInternalServerError.Errorf(""),
			User:                 userAdmin,
			ShouldCallService:    true,
			JsonBody:             `{ "isPublic": true }`,
		},
		{
			Name:                 "returns 404 when dashboard not found",
			ExpectedHttpResponse: http.StatusNotFound,
			publicDashboard:      &PublicDashboard{},
			SaveDashboardErr:     ErrDashboardNotFound.Errorf(""),
			User:                 userAdmin,
			ShouldCallService:    true,
			JsonBody:             `{ "isPublic": true }`,
		},
		{
			Name:                 "returns 200 when update persists RBAC on",
			DashboardUid:         "1",
			publicDashboard:      &PublicDashboard{IsEnabled: true},
			ExpectedHttpResponse: http.StatusOK,
			SaveDashboardErr:     nil,
			User:                 userAdmin,
			ShouldCallService:    true,
			JsonBody:             `{ "isPublic": true }`,
		},
		{
			Name:                 "returns 403 when no permissions RBAC on",
			ExpectedHttpResponse: http.StatusForbidden,
			publicDashboard:      &PublicDashboard{IsEnabled: true},
			SaveDashboardErr:     nil,
			User:                 userNoRBACPerms,
			ShouldCallService:    false,
			JsonBody:             `{ "isPublic": true }`,
		},
		{
			Name:                 "returns 400 when uid is invalid",
			ExpectedHttpResponse: http.StatusBadRequest,
			publicDashboard:      nil,
			SaveDashboardErr:     nil,
			User:                 userAdmin,
			ShouldCallService:    false,
			JsonBody:             `{ "uid": "*", "isEnabled": true }`,
		},
		{
			Name:                 "returns 200 when uid is valid",
			ExpectedHttpResponse: http.StatusOK,
			publicDashboard:      &PublicDashboard{IsEnabled: true},
			SaveDashboardErr:     nil,
			User:                 userAdmin,
			ShouldCallService:    true,
			JsonBody:             `{ "uid": "123abc", "isEnabled": true}`,
		},
		{
			Name:                 "returns 400 when access token is invalid",
			ExpectedHttpResponse: http.StatusBadRequest,
			publicDashboard:      nil,
			SaveDashboardErr:     nil,
			User:                 userAdmin,
			ShouldCallService:    false,
			JsonBody:             `{ "AccessToken": "123abc", "isEnabled": true }`,
		},
		{
			Name:                 "returns 200 when access token is valid",
			ExpectedHttpResponse: http.StatusOK,
			publicDashboard:      &PublicDashboard{IsEnabled: true},
			SaveDashboardErr:     nil,
			User:                 userAdmin,
			ShouldCallService:    true,
			JsonBody:             `{ "accessToken": "d64457c699644079b50230cfefddb211", "isEnabled": true}`,
		},
	}

	for _, test := range testCases {
		t.Run(test.Name, func(t *testing.T) {
			service := publicdashboards.NewFakePublicDashboardService(t)

			// this is to avoid AssertExpectations fail at t.Cleanup when the middleware returns before calling the service
			if test.ShouldCallService {
				service.On("Create", mock.Anything, mock.Anything, mock.AnythingOfType("*models.SavePublicDashboardDTO")).
					Return(&PublicDashboard{IsEnabled: true}, test.SaveDashboardErr)
			}

			cfg := setting.NewCfg()

			testServer := setupTestServer(
				t,
				cfg,
				featuremgmt.WithFeatures(featuremgmt.FlagPublicDashboards),
				service,
				nil,
				test.User,
			)

			response := callAPI(
				testServer,
				http.MethodPost,
				"/api/dashboards/uid/1/public-dashboards",
				strings.NewReader(test.JsonBody),
				t,
			)

			assert.Equal(t, test.ExpectedHttpResponse, response.Code)

			//check the result if it's a 200
			if response.Code == http.StatusOK {
				val, err := json.Marshal(test.publicDashboard)
				require.NoError(t, err)
				assert.Equal(t, string(val), response.Body.String())
			}
		})
	}
}

func TestAPIUpdatePublicDashboard(t *testing.T) {
	dashboardUid := "abc1234"
	publicDashboardUid := "1234asdfasdf"

	adminUser := &user.SignedInUser{UserID: 4, OrgID: 1, OrgRole: org.RoleEditor, Login: "testEditorUser", Permissions: map[int64]map[string][]string{1: {dashboards.ActionDashboardsPublicWrite: {dashboards.ScopeDashboardsAll}}}}

	userEditorPublicDashboard := &user.SignedInUser{UserID: 4, OrgID: 1, OrgRole: org.RoleEditor, Login: "testEditorUser", Permissions: map[int64]map[string][]string{1: {dashboards.ActionDashboardsPublicWrite: {fmt.Sprintf("dashboards:uid:%s", dashboardUid)}}}}

	userEditorAnotherPublicDashboard := &user.SignedInUser{UserID: 4, OrgID: 1, OrgRole: org.RoleEditor, Login: "testEditorUser", Permissions: map[int64]map[string][]string{1: {dashboards.ActionDashboardsPublicWrite: {"another-uid"}}}}

	testCases := []struct {
		Name                 string
		User                 *user.SignedInUser
		DashboardUid         string
		PublicDashboardUid   string
		PublicDashboardRes   *PublicDashboard
		PublicDashboardErr   error
		ExpectedHttpResponse int
		ShouldCallService    bool
	}{
		{
			Name:                 "Invalid dashboardUid",
			User:                 adminUser,
			DashboardUid:         "",
			PublicDashboardUid:   "",
			PublicDashboardRes:   nil,
			PublicDashboardErr:   ErrPublicDashboardIdentifierNotSet.Errorf(""),
			ExpectedHttpResponse: http.StatusNotFound,
			ShouldCallService:    false,
		},
		{
			Name:                 "Invalid public dashboard uid",
			User:                 adminUser,
			DashboardUid:         dashboardUid,
			PublicDashboardUid:   "",
			PublicDashboardRes:   nil,
			PublicDashboardErr:   ErrPublicDashboardNotFound.Errorf(""),
			ExpectedHttpResponse: http.StatusNotFound,
			ShouldCallService:    false,
		},
		{
			Name:                 "Service Error",
			User:                 adminUser,
			DashboardUid:         dashboardUid,
			PublicDashboardUid:   publicDashboardUid,
			PublicDashboardRes:   nil,
			PublicDashboardErr:   ErrDashboardNotFound.Errorf(""),
			ExpectedHttpResponse: http.StatusNotFound,
			ShouldCallService:    true,
		},
		{
			Name:                 "Success",
			User:                 adminUser,
			DashboardUid:         dashboardUid,
			PublicDashboardUid:   publicDashboardUid,
			PublicDashboardRes:   &PublicDashboard{Uid: "success"},
			PublicDashboardErr:   nil,
			ExpectedHttpResponse: http.StatusOK,
			ShouldCallService:    true,
		},

		// permissions
		{
			Name:                 "User can update this public dashboard",
			User:                 userEditorPublicDashboard,
			DashboardUid:         dashboardUid,
			PublicDashboardUid:   publicDashboardUid,
			PublicDashboardRes:   &PublicDashboard{Uid: "success"},
			PublicDashboardErr:   nil,
			ExpectedHttpResponse: http.StatusOK,
			ShouldCallService:    true,
		},
		{
			Name:                 "User has permissions on another dashboard",
			User:                 userEditorAnotherPublicDashboard,
			PublicDashboardUid:   publicDashboardUid,
			ExpectedHttpResponse: http.StatusForbidden,
			ShouldCallService:    false,
		},
		{
			Name:                 "Viewer cannot update any dashboard",
			User:                 userViewer,
			PublicDashboardUid:   publicDashboardUid,
			ExpectedHttpResponse: http.StatusForbidden,
			ShouldCallService:    false,
		},
	}

	for _, test := range testCases {
		t.Run(test.Name, func(t *testing.T) {
			service := publicdashboards.NewFakePublicDashboardService(t)

			if test.ShouldCallService {
				service.On("Update", mock.Anything, mock.Anything, mock.Anything).
					Return(test.PublicDashboardRes, test.PublicDashboardErr)
			}

			cfg := setting.NewCfg()
			features := featuremgmt.WithFeatures(featuremgmt.FlagPublicDashboards)
			testServer := setupTestServer(t, cfg, features, service, nil, test.User)
			url := fmt.Sprintf("/api/dashboards/uid/%s/public-dashboards/%s", test.DashboardUid, test.PublicDashboardUid)
			body := strings.NewReader(fmt.Sprintf(`{ "uid": "%s"}`, test.PublicDashboardUid))

			response := callAPI(testServer, http.MethodPatch, url, body, t)
			assert.Equal(t, test.ExpectedHttpResponse, response.Code)

			// check whether service called
			if !test.ShouldCallService {
				service.AssertNotCalled(t, "Update")
			}

			fmt.Println(response.Body.String())

			// check response
			if response.Code == http.StatusOK {
				val, err := json.Marshal(test.PublicDashboardRes)
				require.NoError(t, err)
				assert.Equal(t, string(val), response.Body.String())

				// verify 4XXs except 403 && 404
			} else if test.ExpectedHttpResponse > 200 &&
				test.ExpectedHttpResponse != 403 &&
				test.ExpectedHttpResponse != 404 {
				var errResp JsonErrResponse
				err := json.Unmarshal(response.Body.Bytes(), &errResp)
				require.NoError(t, err)
				assert.Equal(t, test.PublicDashboardErr.Error(), errResp.Error)
			}
		})
	}
}