package control

import (
	"encoding/hex"
	"errors"

	"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"
	"github.com/spf13/cobra"
)

const (
	chainIDFlag    = "chain-id"
	chainIDHexFlag = "chain-id-hex"
	allFlag        = "all"
)

var (
	errEmptyChainID = errors.New("chain id cannot be empty")

	removeRuleCmd = &cobra.Command{
		Use:   "remove-rule",
		Short: "Remove local override",
		Long:  "Remove local APE override of the node",
		Run:   removeRule,
	}
)

func removeRule(cmd *cobra.Command, _ []string) {
	pk := key.Get(cmd)
	hexEncoded, _ := cmd.Flags().GetBool(chainIDHexFlag)
	removeAll, _ := cmd.Flags().GetBool(allFlag)
	if removeAll {
		req := &control.RemoveChainLocalOverridesByTargetRequest{
			Body: &control.RemoveChainLocalOverridesByTargetRequest_Body{
				Target: parseTarget(cmd),
			},
		}
		signRequest(cmd, pk, req)
		cli := getClient(cmd, pk)
		var resp *control.RemoveChainLocalOverridesByTargetResponse
		var err error
		err = cli.ExecRaw(func(client *client.Client) error {
			resp, err = control.RemoveChainLocalOverridesByTarget(client, req)
			return err
		})
		commonCmd.ExitOnErr(cmd, "rpc error: %w", err)
		verifyResponse(cmd, resp.GetSignature(), resp.GetBody())
		cmd.Println("All rules have been removed.")
		return
	}

	chainID, _ := cmd.Flags().GetString(chainIDFlag)
	if chainID == "" {
		commonCmd.ExitOnErr(cmd, "read chain id error: %w", errEmptyChainID)
	}
	chainIDRaw := []byte(chainID)

	if hexEncoded {
		var err error
		chainIDRaw, err = hex.DecodeString(chainID)
		commonCmd.ExitOnErr(cmd, "can't decode chain ID as hex: %w", err)
	}

	req := &control.RemoveChainLocalOverrideRequest{
		Body: &control.RemoveChainLocalOverrideRequest_Body{
			Target:  parseTarget(cmd),
			ChainId: chainIDRaw,
		},
	}

	signRequest(cmd, pk, req)

	cli := getClient(cmd, pk)

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

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

	cmd.Println("Rule has been removed.")
}

func initControlRemoveRuleCmd() {
	initControlFlags(removeRuleCmd)

	ff := removeRuleCmd.Flags()
	ff.String(targetNameFlag, "", targetNameDesc)
	ff.String(targetTypeFlag, "", targetTypeDesc)
	_ = removeRuleCmd.MarkFlagRequired(targetTypeFlag)
	ff.String(chainIDFlag, "", "Chain id")
	ff.Bool(chainIDHexFlag, false, "Flag to parse chain ID as hex")
	ff.Bool(allFlag, false, "Remove all chains")
	removeRuleCmd.MarkFlagsMutuallyExclusive(allFlag, chainIDFlag)
}