package sqlstore

import (
	"context"
	"math/rand"
	"strconv"
	"testing"
	"time"

	"github.com/grafana/grafana/pkg/components/simplejson"
	"github.com/grafana/grafana/pkg/models"
	"github.com/grafana/grafana/pkg/services/org"
	"github.com/grafana/grafana/pkg/services/user"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestIntegrationSQLBuilder(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test")
	}
	t.Run("WriteDashboardPermissionFilter", func(t *testing.T) {
		t.Run("user ACL", func(t *testing.T) {
			test(t,
				DashboardProps{},
				&DashboardPermission{User: true, Permission: models.PERMISSION_VIEW},
				Search{UserFromACL: true, RequiredPermission: models.PERMISSION_VIEW},
				shouldFind,
			)

			test(t,
				DashboardProps{},
				&DashboardPermission{User: true, Permission: models.PERMISSION_VIEW},
				Search{UserFromACL: true, RequiredPermission: models.PERMISSION_EDIT},
				shouldNotFind,
			)

			test(t,
				DashboardProps{},
				&DashboardPermission{User: true, Permission: models.PERMISSION_EDIT},
				Search{UserFromACL: true, RequiredPermission: models.PERMISSION_EDIT},
				shouldFind,
			)

			test(t,
				DashboardProps{},
				&DashboardPermission{User: true, Permission: models.PERMISSION_VIEW},
				Search{RequiredPermission: models.PERMISSION_VIEW},
				shouldNotFind,
			)
		})

		t.Run("role ACL", func(t *testing.T) {
			test(t,
				DashboardProps{},
				&DashboardPermission{Role: org.RoleViewer, Permission: models.PERMISSION_VIEW},
				Search{UsersOrgRole: org.RoleViewer, RequiredPermission: models.PERMISSION_VIEW},
				shouldFind,
			)

			test(t,
				DashboardProps{},
				&DashboardPermission{Role: org.RoleViewer, Permission: models.PERMISSION_VIEW},
				Search{UsersOrgRole: org.RoleViewer, RequiredPermission: models.PERMISSION_EDIT},
				shouldNotFind,
			)

			test(t,
				DashboardProps{},
				&DashboardPermission{Role: org.RoleEditor, Permission: models.PERMISSION_VIEW},
				Search{UsersOrgRole: org.RoleViewer, RequiredPermission: models.PERMISSION_VIEW},
				shouldNotFind,
			)

			test(t,
				DashboardProps{},
				&DashboardPermission{Role: org.RoleEditor, Permission: models.PERMISSION_VIEW},
				Search{UsersOrgRole: org.RoleViewer, RequiredPermission: models.PERMISSION_VIEW},
				shouldNotFind,
			)
		})

		t.Run("team ACL", func(t *testing.T) {
			test(t,
				DashboardProps{},
				&DashboardPermission{Team: true, Permission: models.PERMISSION_VIEW},
				Search{UserFromACL: true, RequiredPermission: models.PERMISSION_VIEW},
				shouldFind,
			)

			test(t,
				DashboardProps{},
				&DashboardPermission{Team: true, Permission: models.PERMISSION_VIEW},
				Search{UserFromACL: true, RequiredPermission: models.PERMISSION_EDIT},
				shouldNotFind,
			)

			test(t,
				DashboardProps{},
				&DashboardPermission{Team: true, Permission: models.PERMISSION_EDIT},
				Search{UserFromACL: true, RequiredPermission: models.PERMISSION_EDIT},
				shouldFind,
			)

			test(t,
				DashboardProps{},
				&DashboardPermission{Team: true, Permission: models.PERMISSION_EDIT},
				Search{UserFromACL: false, RequiredPermission: models.PERMISSION_EDIT},
				shouldNotFind,
			)
		})

		t.Run("defaults for user ACL", func(t *testing.T) {
			test(t,
				DashboardProps{},
				nil,
				Search{OrgId: -1, UsersOrgRole: org.RoleViewer, RequiredPermission: models.PERMISSION_VIEW},
				shouldNotFind,
			)

			test(t,
				DashboardProps{OrgId: -1},
				nil,
				Search{OrgId: -1, UsersOrgRole: org.RoleViewer, RequiredPermission: models.PERMISSION_VIEW},
				shouldFind,
			)

			test(t,
				DashboardProps{OrgId: -1},
				nil,
				Search{OrgId: -1, UsersOrgRole: org.RoleEditor, RequiredPermission: models.PERMISSION_EDIT},
				shouldFind,
			)

			test(t,
				DashboardProps{OrgId: -1},
				nil,
				Search{OrgId: -1, UsersOrgRole: org.RoleViewer, RequiredPermission: models.PERMISSION_EDIT},
				shouldNotFind,
			)
		})
	})
}

const shouldFind = true
const shouldNotFind = false

type DashboardProps struct {
	OrgId int64
}

type DashboardPermission struct {
	User       bool
	Team       bool
	Role       org.RoleType
	Permission models.PermissionType
}

type Search struct {
	UsersOrgRole       org.RoleType
	UserFromACL        bool
	RequiredPermission models.PermissionType
	OrgId              int64
}

type dashboardResponse struct {
	Id int64
}

func test(t *testing.T, dashboardProps DashboardProps, dashboardPermission *DashboardPermission, search Search, shouldFind bool) {
	t.Helper()

	t.Run("", func(t *testing.T) {
		// Will also cleanup the db
		sqlStore := InitTestDB(t)

		dashboard := createDummyDashboard(t, sqlStore, dashboardProps)

		var aclUserID int64
		if dashboardPermission != nil {
			aclUserID = createDummyACL(t, sqlStore, dashboardPermission, search, dashboard.Id)
			t.Logf("Created ACL with user ID %d\n", aclUserID)
		}
		dashboards := getDashboards(t, sqlStore, search, aclUserID)

		if shouldFind {
			require.Len(t, dashboards, 1, "Should return one dashboard")
			assert.Equal(t, dashboard.Id, dashboards[0].Id, "Should return created dashboard")
		} else {
			assert.Empty(t, dashboards, "Should not return any dashboard")
		}
	})
}

func createDummyUser(t *testing.T, sqlStore *SQLStore) *user.User {
	t.Helper()

	uid := strconv.Itoa(rand.Intn(9999999))
	createUserCmd := user.CreateUserCommand{
		Email:          uid + "@example.com",
		Login:          uid,
		Name:           uid,
		Company:        "",
		OrgName:        "",
		Password:       uid,
		EmailVerified:  true,
		IsAdmin:        false,
		SkipOrgSetup:   false,
		DefaultOrgRole: string(org.RoleViewer),
	}
	user, err := sqlStore.CreateUser(context.Background(), createUserCmd)
	require.NoError(t, err)

	return user
}

func createDummyDashboard(t *testing.T, sqlStore *SQLStore, dashboardProps DashboardProps) *models.Dashboard {
	t.Helper()

	json, err := simplejson.NewJson([]byte(`{"schemaVersion":17,"title":"gdev dashboards","uid":"","version":1}`))
	require.NoError(t, err)

	saveDashboardCmd := models.SaveDashboardCommand{
		Dashboard:    json,
		UserId:       0,
		Overwrite:    false,
		Message:      "",
		RestoredFrom: 0,
		PluginId:     "",
		FolderId:     0,
		IsFolder:     false,
		UpdatedAt:    time.Time{},
	}
	if dashboardProps.OrgId != 0 {
		saveDashboardCmd.OrgId = dashboardProps.OrgId
	} else {
		saveDashboardCmd.OrgId = 1
	}

	dash := insertTestDashboard(t, sqlStore, "", saveDashboardCmd.OrgId, 0, false, nil)
	require.NoError(t, err)

	t.Logf("Created dashboard with ID %d and org ID %d\n", dash.Id, dash.OrgId)
	return dash
}

func createDummyACL(t *testing.T, sqlStore *SQLStore, dashboardPermission *DashboardPermission, search Search, dashboardID int64) int64 {
	t.Helper()

	acl := &models.DashboardACL{
		OrgID:       1,
		Created:     time.Now(),
		Updated:     time.Now(),
		Permission:  dashboardPermission.Permission,
		DashboardID: dashboardID,
	}

	var user *user.User
	if dashboardPermission.User {
		t.Logf("Creating user")
		user = createDummyUser(t, sqlStore)

		acl.UserID = user.ID
	}

	if dashboardPermission.Team {
		// TODO: Restore/refactor sqlBuilder tests after user, org and team services are split
		t.Skip("Creating team: skip, team service is moved")
	}

	if len(string(dashboardPermission.Role)) > 0 {
		acl.Role = &dashboardPermission.Role
	}

	err := updateDashboardACL(t, sqlStore, dashboardID, acl)
	require.NoError(t, err)
	if user != nil {
		return user.ID
	}
	return 0
}

func getDashboards(t *testing.T, sqlStore *SQLStore, search Search, aclUserID int64) []*dashboardResponse {
	t.Helper()

	old := sqlStore.Cfg.RBACEnabled
	sqlStore.Cfg.RBACEnabled = false
	defer func() {
		sqlStore.Cfg.RBACEnabled = old
	}()

	builder := NewSqlBuilder(sqlStore.Cfg)
	signedInUser := &user.SignedInUser{
		UserID: 9999999999,
	}

	if search.OrgId == 0 {
		signedInUser.OrgID = 1
	} else {
		signedInUser.OrgID = search.OrgId
	}

	if len(string(search.UsersOrgRole)) > 0 {
		signedInUser.OrgRole = search.UsersOrgRole
	} else {
		signedInUser.OrgRole = org.RoleViewer
	}
	if search.UserFromACL {
		signedInUser.UserID = aclUserID
	}

	var res []*dashboardResponse
	builder.Write("SELECT * FROM dashboard WHERE true")
	builder.WriteDashboardPermissionFilter(signedInUser, search.RequiredPermission)
	t.Logf("Searching for dashboards, SQL: %q\n", builder.GetSQLString())
	err := sqlStore.engine.SQL(builder.GetSQLString(), builder.params...).Find(&res)
	require.NoError(t, err)
	return res
}