//go:build ignore

// Prints the Go reference verdict for every encoding in
// src/lib/dkc/testing/bls12381-vectors.json, as a JSON object from label to
// "point", "identity" or "invalid". The decoding is the one profile.Validate
// uses: the KeyGroup of the drand crypto scheme (G1 for the unchained scheme,
// G2 for bls-unchained-g1-rfc9380, Quicknet), whose UnmarshalBinary is
// kyber-bls12381 over kilic/bls12-381 FromCompressed, and Equal(Null()) for the
// identity. Run it from a scratch module that requires the reference
// implementation (replace g.activething.com/go/DateKeys => ../datekeys-go and
// GOFLAGS=-mod=mod), passing the path of the vectors file:
//
//	go run bls12381-go-verdicts.go path/to/bls12381-vectors.json
package main

import (
	"encoding/hex"
	"encoding/json"
	"fmt"
	"os"

	"github.com/drand/drand/v2/crypto"
)

func main() {
	raw, err := os.ReadFile(os.Args[1])
	if err != nil {
		panic(err)
	}
	var file struct {
		Vectors []struct{ Label, Group, Hex string }
	}
	if err := json.Unmarshal(raw, &file); err != nil {
		panic(err)
	}
	g1, _ := crypto.GetSchemeByID(crypto.UnchainedSchemeID)
	g2, _ := crypto.GetSchemeByID(crypto.SigsOnG1ID)
	out := map[string]string{}
	for _, v := range file.Vectors {
		s := g1
		if v.Group == "G2" {
			s = g2
		}
		b, err := hex.DecodeString(v.Hex)
		if err != nil {
			panic(err)
		}
		k := s.KeyGroup.Point()
		switch {
		case k.UnmarshalBinary(b) != nil:
			out[v.Label] = "invalid"
		case k.Equal(k.Null()):
			out[v.Label] = "identity"
		default:
			out[v.Label] = "point"
		}
	}
	j, err := json.MarshalIndent(out, "", " ")
	if err != nil {
		panic(err)
	}
	fmt.Println(string(j))
}