package output

import (
	"encoding/base64"

	apechain "git.frostfs.info/TrueCloudLab/policy-engine/pkg/chain"
	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
	"github.com/spf13/cobra"
)

const (
	minPrintable = 32
	maxPrintable = 127
)

func PrintChains(cmd *cobra.Command, list []stackitem.Item, decodeChain, decodeID bool) error {
	for _, item := range list {
		bytes, err := item.TryBytes()
		if err != nil {
			return err
		}

		if !decodeChain {
			cmd.Println(string(bytes))
			continue
		}

		var chain apechain.Chain
		if err = chain.DecodeBytes(bytes); err != nil {
			cmd.PrintErrf("invalid chain format: %s\n", base64.StdEncoding.EncodeToString(bytes))
			continue
		}

		raw, err := chain.MarshalJSON()
		if err != nil {
			return err
		}

		if decodeID {
			var printableID string

			for _, r := range string(chain.ID) {
				if minPrintable <= r && r <= maxPrintable {
					printableID += string(r)
				} else {
					printableID += "."
				}
			}
			cmd.Println(printableID, string(raw))
		} else {
			cmd.Println(string(raw))
		}
	}

	return nil
}