package cli

import (
	"context"
	"fmt"
	"strconv"
	"strings"
	"time"

	apiV1 "github.com/juanfont/headscale/gen/go/headscale/v1"
	"github.com/pterm/pterm"
	"github.com/rs/zerolog/log"
	"github.com/spf13/cobra"
)

func init() {
	rootCmd.AddCommand(namespaceCmd)
	namespaceCmd.AddCommand(createNamespaceCmd)
	namespaceCmd.AddCommand(listNamespacesCmd)
	namespaceCmd.AddCommand(destroyNamespaceCmd)
	namespaceCmd.AddCommand(renameNamespaceCmd)
}

var namespaceCmd = &cobra.Command{
	Use:   "namespaces",
	Short: "Manage the namespaces of Headscale",
}

var createNamespaceCmd = &cobra.Command{
	Use:   "create NAME",
	Short: "Creates a new namespace",
	Args: func(cmd *cobra.Command, args []string) error {
		if len(args) < 1 {
			return fmt.Errorf("Missing parameters")
		}
		return nil
	},
	Run: func(cmd *cobra.Command, args []string) {
		o, _ := cmd.Flags().GetString("output")

		ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
		defer cancel()

		client, conn := getHeadscaleGRPCClient(ctx)
		defer conn.Close()

		log.Trace().Interface("client", client).Msg("Obtained gRPC client")

		request := &apiV1.CreateNamespaceRequest{Name: args[0]}

		log.Trace().Interface("request", request).Msg("Sending CreateNamespace request")
		response, err := client.CreateNamespace(ctx, request)
		if strings.HasPrefix(o, "json") {
			JsonOutput(response.Name, err, o)
			return
		}
		if err != nil {
			fmt.Printf("Error creating namespace: %s\n", err)
			return
		}
		fmt.Printf("Namespace created\n")
	},
}

var destroyNamespaceCmd = &cobra.Command{
	Use:   "destroy NAME",
	Short: "Destroys a namespace",
	Args: func(cmd *cobra.Command, args []string) error {
		if len(args) < 1 {
			return fmt.Errorf("Missing parameters")
		}
		return nil
	},
	Run: func(cmd *cobra.Command, args []string) {
		o, _ := cmd.Flags().GetString("output")
		h, err := getHeadscaleApp()
		if err != nil {
			log.Fatal().Err(err).Msgf("Error initializing: %s", err)
		}
		err = h.DestroyNamespace(args[0])
		if strings.HasPrefix(o, "json") {
			JsonOutput(map[string]string{"Result": "Namespace destroyed"}, err, o)
			return
		}
		if err != nil {
			fmt.Printf("Error destroying namespace: %s\n", err)
			return
		}
		fmt.Printf("Namespace destroyed\n")
	},
}

var listNamespacesCmd = &cobra.Command{
	Use:   "list",
	Short: "List all the namespaces",
	Run: func(cmd *cobra.Command, args []string) {
		o, _ := cmd.Flags().GetString("output")
		h, err := getHeadscaleApp()
		if err != nil {
			log.Fatal().Err(err).Msgf("Error initializing: %s", err)
		}
		namespaces, err := h.ListNamespaces()
		if strings.HasPrefix(o, "json") {
			JsonOutput(namespaces, err, o)
			return
		}
		if err != nil {
			fmt.Println(err)
			return
		}

		d := pterm.TableData{{"ID", "Name", "Created"}}
		for _, n := range *namespaces {
			d = append(
				d,
				[]string{strconv.FormatUint(uint64(n.ID), 10), n.Name, n.CreatedAt.Format("2006-01-02 15:04:05")},
			)
		}
		err = pterm.DefaultTable.WithHasHeader().WithData(d).Render()
		if err != nil {
			log.Fatal().Err(err).Msg("")
		}
	},
}

var renameNamespaceCmd = &cobra.Command{
	Use:   "rename OLD_NAME NEW_NAME",
	Short: "Renames a namespace",
	Args: func(cmd *cobra.Command, args []string) error {
		if len(args) < 2 {
			return fmt.Errorf("Missing parameters")
		}
		return nil
	},
	Run: func(cmd *cobra.Command, args []string) {
		o, _ := cmd.Flags().GetString("output")
		h, err := getHeadscaleApp()
		if err != nil {
			log.Fatal().Err(err).Msgf("Error initializing: %s", err)
		}
		err = h.RenameNamespace(args[0], args[1])
		if strings.HasPrefix(o, "json") {
			JsonOutput(map[string]string{"Result": "Namespace renamed"}, err, o)
			return
		}
		if err != nil {
			fmt.Printf("Error renaming namespace: %s\n", err)
			return
		}
		fmt.Printf("Namespace renamed\n")
	},
}