package control

import (
	"fmt"

	"github.com/mr-tron/base58"
	rawclient "github.com/nspcc-dev/neofs-api-go/v2/rpc/client"
	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/common"
	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/key"
	"github.com/nspcc-dev/neofs-node/pkg/services/control"
	"github.com/spf13/cobra"
)

const (
	shardModeFlag        = "mode"
	shardIDFlag          = "id"
	shardClearErrorsFlag = "clear-errors"

	shardModeReadOnly         = "read-only"
	shardModeReadWrite        = "read-write"
	shardModeDegraded         = "degraded-read-write"
	shardModeDegradedReadOnly = "degraded-read-only"
)

var setShardModeCmd = &cobra.Command{
	Use:   "set-mode",
	Short: "Set work mode of the shard",
	Long:  "Set work mode of the shard",
	Run:   setShardMode,
}

func initControlSetShardModeCmd() {
	commonflags.InitWithoutRPC(setShardModeCmd)

	flags := setShardModeCmd.Flags()

	flags.String(controlRPC, controlRPCDefault, controlRPCUsage)
	flags.String(shardIDFlag, "", "ID of the shard in base58 encoding")
	flags.String(shardModeFlag, "",
		fmt.Sprintf("New shard mode keyword ('%s', '%s', '%s')",
			shardModeReadWrite,
			shardModeReadOnly,
			shardModeDegraded,
		),
	)
	flags.Bool(shardClearErrorsFlag, false, "Set shard error count to 0")
}

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

	var mode control.ShardMode

	switch shardMode, _ := cmd.Flags().GetString(shardModeFlag); shardMode {
	default:
		common.ExitOnErr(cmd, "", fmt.Errorf("unsupported mode %s", shardMode))
	case shardModeReadWrite:
		mode = control.ShardMode_READ_WRITE
	case shardModeReadOnly:
		mode = control.ShardMode_READ_ONLY
	case shardModeDegraded:
		mode = control.ShardMode_DEGRADED
	case shardModeDegradedReadOnly:
		mode = control.ShardMode_DEGRADED_READ_ONLY
	}

	req := new(control.SetShardModeRequest)

	body := new(control.SetShardModeRequest_Body)
	req.SetBody(body)

	body.SetMode(mode)
	body.SetShardIDList([][]byte{getShardID(cmd)})

	reset, _ := cmd.Flags().GetBool(shardClearErrorsFlag)
	body.ClearErrorCounter(reset)

	signRequest(cmd, pk, req)

	cli := getClient(cmd, pk)

	var resp *control.SetShardModeResponse
	var err error
	err = cli.ExecRaw(func(client *rawclient.Client) error {
		resp, err = control.SetShardMode(client, req)
		return err
	})
	common.ExitOnErr(cmd, "rpc error: %w", err)

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

	cmd.Println("Shard mode update request successfully sent.")
}

func getShardID(cmd *cobra.Command) []byte {
	sid, _ := cmd.Flags().GetString(shardIDFlag)
	raw, err := base58.Decode(sid)
	common.ExitOnErr(cmd, "incorrect shard ID encoding: %w", err)
	return raw
}