package commands

import (
	"context"
	"time"

	"github.com/cortezaproject/corteza/server/auth/external"
	"github.com/cortezaproject/corteza/server/pkg/auth"
	"github.com/cortezaproject/corteza/server/pkg/cli"
	"github.com/cortezaproject/corteza/server/pkg/logger"
	"github.com/cortezaproject/corteza/server/pkg/options"
	"github.com/cortezaproject/corteza/server/store"
	"github.com/cortezaproject/corteza/server/system/service"
	"github.com/cortezaproject/corteza/server/system/types"
	"github.com/spf13/cobra"
)

type (
	serviceInitializer interface {
		InitServices(ctx context.Context) error
		Activate(ctx context.Context) error
		Options() *options.Options
	}
)

func commandPreRunInitService(app serviceInitializer) func(*cobra.Command, []string) error {
	return func(_ *cobra.Command, _ []string) error {
		return app.InitServices(cli.Context())
	}
}

func commandPreRunInitActivate(app serviceInitializer) func(*cobra.Command, []string) error {
	return func(_ *cobra.Command, _ []string) error {
		return app.Activate(cli.Context())
	}
}

func Command(ctx context.Context, app serviceInitializer, storeInit func(ctx context.Context) (store.Storer, error)) *cobra.Command {
	var (
		enableDiscoveredProvider               bool
		skipValidationOnAutoDiscoveredProvider bool

		clientID      uint64
		scope         []string
		tokenDuration time.Duration
	)

	cmd := &cobra.Command{
		Use:   "auth",
		Short: "Authentication management",
	}

	autoDiscoverCmd := &cobra.Command{
		Use:     "auto-discovery [name] [url]",
		Short:   "Auto discovers new OIDC client",
		Args:    cobra.ExactArgs(2),
		PreRunE: commandPreRunInitService(app),
		Run: func(cmd *cobra.Command, args []string) {
			ctx := cli.Context()

			s, err := storeInit(ctx)
			cli.HandleError(err)

			_, err = external.RegisterOidcProvider(
				ctx,
				logger.Default(),
				s,
				app.Options().Auth,
				args[0],
				args[1],
				true,
				!skipValidationOnAutoDiscoveredProvider,
				enableDiscoveredProvider,
			)

			cli.HandleError(err)

			if enableDiscoveredProvider {
				cmd.Println("OIDC provider successfully added and enabled.")
			} else {
				cmd.Println("OIDC provider successfully added (still disabled).")
			}
		},
	}

	autoDiscoverCmd.Flags().BoolVar(
		&enableDiscoveredProvider,
		"enable",
		false,
		"Enable this provider and external auth")

	autoDiscoverCmd.Flags().BoolVar(
		&skipValidationOnAutoDiscoveredProvider,
		"skip-validation",
		false,
		"Skip validation")

	jwtCmd := &cobra.Command{
		Use:     "jwt [email-or-id]",
		Short:   "Generates new JWT for a user",
		Args:    cobra.MinimumNArgs(1),
		PreRunE: commandPreRunInitService(app),
		Run: func(cmd *cobra.Command, args []string) {
			ctx = auth.SetIdentityToContext(ctx, auth.ServiceUser())
			var (
				signedToken []byte
				user        *types.User
				err         error

				userStr = args[0]
			)

			user, err = service.DefaultUser.FindByAny(ctx, userStr)
			cli.HandleError(err)

			err = service.DefaultAuth.LoadRoleMemberships(ctx, user)
			cli.HandleError(err)

			opts := []auth.IssueOptFn{
				auth.WithIdentity(user),
				auth.WithScope(scope...),
			}

			if clientID > 0 {
				opts = append(opts, auth.WithClientID(clientID))
			}

			if tokenDuration > 0 {
				opts = append(opts, auth.WithExpiration(tokenDuration))
			}

			signedToken, err = auth.TokenIssuer.Issue(ctx, opts...)

			cli.HandleError(err)
			cmd.Println(string(signedToken))
		},
	}

	jwtCmd.Flags().Uint64Var(
		&clientID,
		"auth-client",
		0,
		"ID if the auth client")

	jwtCmd.Flags().StringArrayVar(
		&scope,
		"scope",
		[]string{"profile", "api"},
		"Scope")

	jwtCmd.Flags().DurationVar(
		&tokenDuration,
		"duration",
		app.Options().Auth.AccessTokenLifetime,
		"Token expiry duration")

	testEmails := &cobra.Command{
		Use:     "test-notifications [recipient]",
		Short:   "Sends samples of all authentication notification to recipient",
		Args:    cobra.ExactArgs(1),
		PreRunE: commandPreRunInitActivate(app),
		Run: func(cmd *cobra.Command, args []string) {
			var (
				err error
				ntf = service.DefaultAuthNotification
			)

			// Update current settings to be sure that we do not have outdated values
			cli.HandleError(service.DefaultSettings.UpdateCurrent(ctx))

			err = ntf.PasswordReset(ctx, args[0], "notification-testing-token")
			cli.HandleError(err)
		},
	}

	cmd.AddCommand(
		autoDiscoverCmd,
		testEmails,
		jwtCmd,
		assets(app),
	)

	return cmd
}