package mpc

import (
	"fmt"
	"math/big"

	"github.com/sonr-io/crypto/core/curves"
)

func GetECDSAPoint(pubKey []byte) (*curves.EcPoint, error) {
	crv := curves.K256()
	x := new(big.Int).SetBytes(pubKey[1:33])
	y := new(big.Int).SetBytes(pubKey[33:])
	ecCurve, err := crv.ToEllipticCurve()
	if err != nil {
		return nil, fmt.Errorf("error converting curve: %v", err)
	}
	return &curves.EcPoint{X: x, Y: y, Curve: ecCurve}, nil
}

func DeserializeSignature(sigBytes []byte) (*curves.EcdsaSignature, error) {
	if len(sigBytes) != 64 {
		return nil, fmt.Errorf("invalid signature length: expected 64 bytes, got %d", len(sigBytes))
	}

	r := new(big.Int).SetBytes(sigBytes[:32])
	s := new(big.Int).SetBytes(sigBytes[32:])

	return &curves.EcdsaSignature{
		R: r,
		S: s,
	}, nil
}