package nwc

import (
	"fmt"
	"net/url"
	"strings"

	"github.com/ekzyis/magicwallet/nostr"
)

type NwcConnection struct {
	WalletPubkey nostr.PublicKey
	Relays       []*url.URL
	Secret       nostr.PrivateKey
}

func (nwc *NwcConnection) Serialize() string {
	var relays []string
	for _, r := range nwc.Relays {
		relays = append(relays, fmt.Sprintf("relay=%s", r.String()))
	}

	return fmt.Sprintf(
		"nostr+walletconnect//%s?%s&secret=%s",
		nwc.WalletPubkey.Serialize(),
		strings.Join(relays, "&"),
		nwc.Secret.Serialize(),
	)
}

func NewConnection() (*NwcConnection, error) {
	// https://github.com/nostr-protocol/nips/blob/master/47.md

	error := func(err error) error {
		return fmt.Errorf("failed to create nwc connection: %v\n", err)
	}

	// wallet keypair
	_, walletPubkey, err := nostr.GenerateKeyPair()
	if err != nil {
		return nil, error(err)
	}

	// connection secret
	secret, err := nostr.GeneratePrivateKey()
	if err != nil {
		return nil, error(err)
	}

	// relays on which we will listen for requests
	u, err := url.Parse("wss://relay.primal.net")
	if err != nil {
		return nil, error(err)
	}
	relays := []*url.URL{u}

	return &NwcConnection{
		walletPubkey,
		relays,
		secret,
	}, nil
}