package control

import (
	"bytes"
	"crypto/sha256"
	"fmt"
	"strconv"
	"text/tabwriter"

	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/client"
	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-cli/internal/key"
	commonCmd "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/internal/common"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/control"
	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
	"github.com/spf13/cobra"
)

const (
	chainNameFlag      = "chain-name"
	chainNameFlagUsage = "Chain name(ingress|s3)"
)

var listTargetsCmd = &cobra.Command{
	Use:   "list-targets",
	Short: "List local targets",
	Long:  "List local APE overrides of the node",
	Run:   listTargets,
}

func listTargets(cmd *cobra.Command, _ []string) {
	pk := key.Get(cmd)

	var cnr cid.ID
	chainName, _ := cmd.Flags().GetString(chainNameFlag)

	rawCID := make([]byte, sha256.Size)
	cnr.Encode(rawCID)

	req := &control.ListTargetsLocalOverridesRequest{
		Body: &control.ListTargetsLocalOverridesRequest_Body{
			ChainName: chainName,
		},
	}

	signRequest(cmd, pk, req)

	cli := getClient(cmd, pk)

	var resp *control.ListTargetsLocalOverridesResponse
	var err error
	err = cli.ExecRaw(func(client *client.Client) error {
		resp, err = control.ListTargetsLocalOverrides(client, req)
		return err
	})
	commonCmd.ExitOnErr(cmd, "rpc error: %w", err)

	verifyResponse(cmd, resp.GetSignature(), resp.GetBody())

	targets := resp.GetBody().GetTargets()
	if len(targets) == 0 {
		cmd.Println("Local overrides are not defined for any target.")
		return
	}

	buf := bytes.NewBuffer(nil)
	tw := tabwriter.NewWriter(buf, 0, 2, 2, ' ', 0)
	_, _ = tw.Write([]byte("#\tName\tType\n"))
	for i, t := range targets {
		_, _ = tw.Write([]byte(fmt.Sprintf("%s\t%s\t%s\n", strconv.Itoa(i), t.GetName(), t.GetType())))
	}
	_ = tw.Flush()
	cmd.Print(buf.String())
}

func initControlListTargetsCmd() {
	initControlFlags(listTargetsCmd)

	ff := listTargetsCmd.Flags()
	ff.String(chainNameFlag, "", chainNameFlagUsage)

	_ = cobra.MarkFlagRequired(ff, chainNameFlag)
}