package cli

import (
	"context"
	"fmt"
	"time"

	v1 "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) {
		output, _ := cmd.Flags().GetString("output")

		namespaceName := args[0]

		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 := &v1.CreateNamespaceRequest{Name: namespaceName}

		log.Trace().Interface("request", request).Msg("Sending CreateNamespace request")
		response, err := client.CreateNamespace(ctx, request)
		if err != nil {
			ErrorOutput(err, fmt.Sprintf("Cannot create namespace: %s", err), output)
			return
		}

		SuccessOutput(response.Namespace, "Namespace created", output)
	},
}

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) {
		output, _ := cmd.Flags().GetString("output")

		namespaceName := args[0]

		ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
		defer cancel()

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

		request := &v1.DeleteNamespaceRequest{Name: namespaceName}

		response, err := client.DeleteNamespace(ctx, request)
		if err != nil {
			ErrorOutput(err, fmt.Sprintf("Cannot destroy namespace: %s", err), output)
			return
		}

		SuccessOutput(response, "Namespace destroyed", output)
	},
}

var listNamespacesCmd = &cobra.Command{
	Use:   "list",
	Short: "List all the namespaces",
	Run: func(cmd *cobra.Command, args []string) {
		output, _ := cmd.Flags().GetString("output")

		ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
		defer cancel()

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

		request := &v1.ListNamespacesRequest{}

		response, err := client.ListNamespaces(ctx, request)
		if err != nil {
			ErrorOutput(err, fmt.Sprintf("Cannot get namespaces: %s", err), output)
			return
		}

		if output != "" {
			SuccessOutput(response.Namespaces, "", output)
			return
		}

		d := pterm.TableData{{"ID", "Name", "Created"}}
		for _, namespace := range response.GetNamespaces() {
			d = append(
				d,
				[]string{
					namespace.GetId(),
					namespace.GetName(),
					namespace.GetCreatedAt().AsTime().Format("2006-01-02 15:04:05"),
				},
			)
		}
		err = pterm.DefaultTable.WithHasHeader().WithData(d).Render()
		if err != nil {
			ErrorOutput(err, fmt.Sprintf("Failed to render pterm table: %s", err), output)
			return
		}
	},
}

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) {
		output, _ := cmd.Flags().GetString("output")

		ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
		defer cancel()

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

		request := &v1.RenameNamespaceRequest{
			OldName: args[0],
			NewName: args[1],
		}

		response, err := client.RenameNamespace(ctx, request)
		if err != nil {
			ErrorOutput(err, fmt.Sprintf("Cannot rename namespace: %s", err), output)
			return
		}

		SuccessOutput(response.Namespace, "Namespace renamed", output)
	},
}