package control

import (
	"crypto/sha256"

	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/client"
	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-cli/internal/commonflags"
	"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"
	policyengine "git.frostfs.info/TrueCloudLab/policy-engine"
	"github.com/spf13/cobra"
)

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

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

	var cnr cid.ID
	cidStr, _ := cmd.Flags().GetString(commonflags.CIDFlag)
	commonCmd.ExitOnErr(cmd, "can't decode container ID: %w", cnr.DecodeString(cidStr))

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

	req := &control.ListChainLocalOverridesRequest{
		Body: &control.ListChainLocalOverridesRequest_Body{
			ContainerId: rawCID,
		},
	}

	signRequest(cmd, pk, req)

	cli := getClient(cmd, pk)

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

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

	chains := resp.GetBody().GetChains()
	if len(chains) == 0 {
		cmd.Println("Local overrides are not defined for the container.")
		return
	}

	for _, c := range chains {
		// TODO (aarifullin): make pretty-formatted output for chains.
		var chain policyengine.Chain
		commonCmd.ExitOnErr(cmd, "decode error: %w", chain.DecodeBytes(c))
		cmd.Println("Parsed chain:\n" + prettyJSONFormat(cmd, chain.Bytes()))
	}
}

func initControlListRulesCmd() {
	initControlFlags(listRulesCmd)

	ff := listRulesCmd.Flags()
	ff.String(commonflags.CIDFlag, "", commonflags.CIDFlagUsage)
}