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package cmd

import (
	"encoding/json"
	"fmt"

	"git.db.org.ai/dborg/internal/formatter"
	"git.db.org.ai/dborg/internal/models"
	"github.com/spf13/cobra"
)

var dnsCmd = &cobra.Command{
	Use:   "dns",
	Short: "DNS operations",
	Long:  "DNS-related operations for domain checking",
}

var dnsTLDCmd = &cobra.Command{
	Use:     "tld [term]",
	Aliases: []string{"t"},
	Short:   "Check NXDOMAIN for custom term against all TLDs",
	Long:    "Streams NDJSON results checking each TLD. For NXDOMAIN domains, returns status. For existing domains, runs httpx to get page title and tech stack.",
	Args:    argsOrStdin(1),
	RunE:    runDNSTLDCheck,
}

var dnsSiteCmd = &cobra.Command{
	Use:     "site [url]",
	Aliases: []string{"s"},
	Short:   "Check if a website URL has been reused",
	Long:    "Checks if a website URL has been reused across different domains",
	Args:    argsOrStdin(1),
	RunE:    runDNSSiteCheck,
}

func runDNSTLDCheck(cmd *cobra.Command, args []string) error {
	showOnly, _ := cmd.Flags().GetString("show-only")

	c, err := newUnauthenticatedClient()
	if err != nil {
		return fmt.Errorf("failed to create client: %w", err)
	}

	return forEachQuery(args, func(term string) error {
		params := &models.DNSTLDParams{
			Term:     term,
			ShowOnly: showOnly,
		}

		fmt.Printf("Checking TLDs for term: %s\n\n", term)

		err := c.CheckDNSTLDStream(params, func(result json.RawMessage) error {
			var domainResult models.DomainResult
			if err := json.Unmarshal(result, &domainResult); err != nil {
				return fmt.Errorf("failed to parse result: %w", err)
			}
			output, err := formatter.FormatDNSResults(&domainResult, IsJSONOutput())
			if err != nil {
				return err
			}
			printOutput(output)
			return nil
		})
		if err != nil {
			return fmt.Errorf("TLD check failed: %w", err)
		}
		return nil
	})
}

func runDNSSiteCheck(cmd *cobra.Command, args []string) error {
	c, err := newClient()
	if err != nil {
		return fmt.Errorf("failed to create client: %w", err)
	}

	return forEachQuery(args, func(siteURL string) error {
		response, err := c.CheckDNSSite(siteURL)
		if err != nil {
			return fmt.Errorf("site check failed: %w", err)
		}
		if err := checkError(response.Error); err != nil {
			return err
		}
		output, err := formatter.FormatDNSSite(response, IsJSONOutput())
		if err != nil {
			return err
		}
		printOutput(output)
		return nil
	})
}

func init() {
	rootCmd.AddCommand(dnsCmd)
	dnsCmd.AddCommand(dnsTLDCmd)
	dnsCmd.AddCommand(dnsSiteCmd)

	dnsTLDCmd.Flags().StringP("show-only", "s", "", "Filter results: 'exists' (only existing domains), 'nxdomain' (only non-existing domains), or empty (show all)")
}