package main

import (
	"context"
	"fmt"
	"time"

	"github.com/spf13/cobra"
)

func routesCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "routes",
		Short: "Manage routes",
		Long:  "Manage routes for mc-proxy listeners.",
	}

	cmd.AddCommand(routesListCmd())
	cmd.AddCommand(routesAddCmd())
	cmd.AddCommand(routesRemoveCmd())

	return cmd
}

func routesListCmd() *cobra.Command {
	return &cobra.Command{
		Use:   "list LISTENER",
		Short: "List routes for a listener",
		Long:  "List all routes configured for the specified listener address.",
		Args:  cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			listenerAddr := args[0]
			client := clientFromContext(cmd.Context())

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

			routes, err := client.ListRoutes(ctx, listenerAddr)
			if err != nil {
				return fmt.Errorf("listing routes: %w", err)
			}

			if len(routes) == 0 {
				fmt.Printf("No routes for %s\n", listenerAddr)
				return nil
			}

			// Find max hostname length for alignment
			maxHostLen := 0
			for _, r := range routes {
				if len(r.Hostname) > maxHostLen {
					maxHostLen = len(r.Hostname)
				}
			}

			fmt.Printf("Routes for %s:\n", listenerAddr)
			for _, r := range routes {
				fmt.Printf("  %-*s  ->  %s\n", maxHostLen, r.Hostname, r.Backend)
			}

			return nil
		},
	}
}

func routesAddCmd() *cobra.Command {
	return &cobra.Command{
		Use:   "add LISTENER HOSTNAME BACKEND",
		Short: "Add a route",
		Long:  "Add a route mapping a hostname to a backend for the specified listener.",
		Args:  cobra.ExactArgs(3),
		RunE: func(cmd *cobra.Command, args []string) error {
			listenerAddr := args[0]
			hostname := args[1]
			backend := args[2]
			client := clientFromContext(cmd.Context())

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

			if err := client.AddRoute(ctx, listenerAddr, hostname, backend); err != nil {
				return fmt.Errorf("adding route: %w", err)
			}

			fmt.Printf("Added route: %s -> %s on %s\n", hostname, backend, listenerAddr)
			return nil
		},
	}
}

func routesRemoveCmd() *cobra.Command {
	return &cobra.Command{
		Use:   "remove LISTENER HOSTNAME",
		Short: "Remove a route",
		Long:  "Remove a route for the specified hostname from the listener.",
		Args:  cobra.ExactArgs(2),
		RunE: func(cmd *cobra.Command, args []string) error {
			listenerAddr := args[0]
			hostname := args[1]
			client := clientFromContext(cmd.Context())

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

			if err := client.RemoveRoute(ctx, listenerAddr, hostname); err != nil {
				return fmt.Errorf("removing route: %w", err)
			}

			fmt.Printf("Removed route: %s from %s\n", hostname, listenerAddr)
			return nil
		},
	}
}