package api

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

	"github.com/grafana/grafana/pkg/infra/log"
	"github.com/grafana/grafana/pkg/models"
	"github.com/grafana/grafana/pkg/services/accesscontrol"
	"github.com/grafana/grafana/pkg/services/accesscontrol/resourcepermissions"
	"github.com/grafana/grafana/pkg/services/sqlstore"
	"github.com/grafana/grafana/pkg/setting"
	"github.com/grafana/grafana/pkg/web"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

type testLogger struct {
	log.Logger
	warnCalled  bool
	warnMessage string
}

func (stub *testLogger) Warn(testMessage string, ctx ...interface{}) {
	stub.warnCalled = true
	stub.warnMessage = testMessage
}

func TestTeamAPIEndpoint(t *testing.T) {
	t.Run("Given two teams", func(t *testing.T) {
		hs := &HTTPServer{
			Cfg: setting.NewCfg(),
		}
		hs.SQLStore = sqlstore.InitTestDB(t)

		loggedInUserScenario(t, "When calling GET on", "/api/teams/search", "/api/teams/search", func(sc *scenarioContext) {
			_, err := hs.SQLStore.CreateTeam("team1", "", 1)
			require.NoError(t, err)
			_, err = hs.SQLStore.CreateTeam("team2", "", 1)
			require.NoError(t, err)

			sc.handlerFunc = hs.SearchTeams
			sc.fakeReqWithParams("GET", sc.url, map[string]string{}).exec()
			require.Equal(t, http.StatusOK, sc.resp.Code)
			var resp models.SearchTeamQueryResult
			err = json.Unmarshal(sc.resp.Body.Bytes(), &resp)
			require.NoError(t, err)

			assert.EqualValues(t, 2, resp.TotalCount)
			assert.Equal(t, 2, len(resp.Teams))
		})

		loggedInUserScenario(t, "When calling GET on", "/api/teams/search", "/api/teams/search", func(sc *scenarioContext) {
			_, err := hs.SQLStore.CreateTeam("team1", "", 1)
			require.NoError(t, err)
			_, err = hs.SQLStore.CreateTeam("team2", "", 1)
			require.NoError(t, err)

			sc.handlerFunc = hs.SearchTeams
			sc.fakeReqWithParams("GET", sc.url, map[string]string{"perpage": "10", "page": "2"}).exec()
			require.Equal(t, http.StatusOK, sc.resp.Code)
			var resp models.SearchTeamQueryResult
			err = json.Unmarshal(sc.resp.Body.Bytes(), &resp)
			require.NoError(t, err)

			assert.EqualValues(t, 2, resp.TotalCount)
			assert.Equal(t, 0, len(resp.Teams))
		})
	})

	t.Run("When creating team with API key", func(t *testing.T) {
		hs := &HTTPServer{
			Cfg: setting.NewCfg(),
		}
		hs.Cfg.EditorsCanAdmin = true

		teamName := "team foo"

		// TODO: Use a fake SQLStore when it's represented by an interface
		orgCreateTeam := createTeam
		orgAddTeamMember := addOrUpdateTeamMember
		t.Cleanup(func() {
			createTeam = orgCreateTeam
			addOrUpdateTeamMember = orgAddTeamMember
		})

		createTeamCalled := 0
		createTeam = func(sqlStore *sqlstore.SQLStore, name, email string, orgID int64) (models.Team, error) {
			createTeamCalled++
			return models.Team{Name: teamName, Id: 42}, nil
		}

		addTeamMemberCalled := 0
		addOrUpdateTeamMember = func(ctx context.Context, resourcePermissionService *resourcepermissions.Service, userID, orgID, teamID int64,
			permission string) error {
			addTeamMemberCalled++
			return nil
		}

		req, err := http.NewRequest("POST", "/api/teams", nil)
		require.NoError(t, err)

		t.Run("with no real signed in user", func(t *testing.T) {
			stub := &testLogger{}
			c := &models.ReqContext{
				Context:      &web.Context{Req: req},
				SignedInUser: &models.SignedInUser{},
				Logger:       stub,
			}
			c.OrgRole = models.ROLE_EDITOR
			c.Req.Body = mockRequestBody(models.CreateTeamCommand{Name: teamName})
			hs.CreateTeam(c)
			assert.Equal(t, createTeamCalled, 1)
			assert.Equal(t, addTeamMemberCalled, 0)
			assert.True(t, stub.warnCalled)
			assert.Equal(t, stub.warnMessage, "Could not add creator to team because is not a real user")
		})

		t.Run("with real signed in user", func(t *testing.T) {
			stub := &testLogger{}
			c := &models.ReqContext{
				Context:      &web.Context{Req: req},
				SignedInUser: &models.SignedInUser{UserId: 42},
				Logger:       stub,
			}
			c.OrgRole = models.ROLE_EDITOR
			c.Req.Body = mockRequestBody(models.CreateTeamCommand{Name: teamName})
			createTeamCalled, addTeamMemberCalled = 0, 0
			hs.CreateTeam(c)
			assert.Equal(t, createTeamCalled, 1)
			assert.Equal(t, addTeamMemberCalled, 1)
			assert.False(t, stub.warnCalled)
		})
	})
}

var (
	createTeamURL = "/api/teams/"
	createTeamCmd = `{"name": "MyTestTeam%d"}`
)

func TestTeamAPIEndpoint_CreateTeam_LegacyAccessControl(t *testing.T) {
	sc := setupHTTPServer(t, true, false)
	setInitCtxSignedInOrgAdmin(sc.initCtx)

	input := strings.NewReader(fmt.Sprintf(createTeamCmd, 1))
	t.Run("Organisation admin can create a team", func(t *testing.T) {
		response := callAPI(sc.server, http.MethodPost, createTeamURL, input, t)
		assert.Equal(t, http.StatusOK, response.Code)
	})

	setInitCtxSignedInEditor(sc.initCtx)
	sc.initCtx.IsGrafanaAdmin = true
	input = strings.NewReader(fmt.Sprintf(createTeamCmd, 2))
	t.Run("Org editor and server admin cannot create a team", func(t *testing.T) {
		response := callAPI(sc.server, http.MethodPost, createTeamURL, strings.NewReader(createTeamCmd), t)
		assert.Equal(t, http.StatusForbidden, response.Code)
	})
}

func TestTeamAPIEndpoint_CreateTeam_LegacyAccessControl_EditorsCanAdmin(t *testing.T) {
	cfg := setting.NewCfg()
	cfg.EditorsCanAdmin = true
	sc := setupHTTPServerWithCfg(t, true, false, cfg)

	setInitCtxSignedInEditor(sc.initCtx)
	input := strings.NewReader(fmt.Sprintf(createTeamCmd, 1))
	t.Run("Editors can create a team if editorsCanAdmin is set to true", func(t *testing.T) {
		response := callAPI(sc.server, http.MethodPost, createTeamURL, input, t)
		assert.Equal(t, http.StatusOK, response.Code)
	})
}

func TestTeamAPIEndpoint_CreateTeam_FGAC(t *testing.T) {
	sc := setupHTTPServer(t, true, true)

	setInitCtxSignedInViewer(sc.initCtx)
	input := strings.NewReader(fmt.Sprintf(createTeamCmd, 1))
	t.Run("Access control allows creating teams with the correct permissions", func(t *testing.T) {
		setAccessControlPermissions(sc.acmock, []*accesscontrol.Permission{{Action: accesscontrol.ActionTeamsCreate}}, 1)
		response := callAPI(sc.server, http.MethodPost, createTeamURL, input, t)
		assert.Equal(t, http.StatusOK, response.Code)
	})

	input = strings.NewReader(fmt.Sprintf(createTeamCmd, 2))
	t.Run("Access control prevents creating teams with the incorrect permissions", func(t *testing.T) {
		setAccessControlPermissions(sc.acmock, []*accesscontrol.Permission{{Action: "teams:invalid"}}, accesscontrol.GlobalOrgID)
		response := callAPI(sc.server, http.MethodPost, createTeamURL, input, t)
		assert.Equal(t, http.StatusForbidden, response.Code)
	})
}