package peermgr

import (
	"fmt"
	crypto2 "github.com/libp2p/go-libp2p-core/crypto"
	"github.com/libp2p/go-libp2p-core/peer"
	"github.com/meshplus/bitxhub-kit/crypto"
	"github.com/meshplus/bitxhub-kit/crypto/asym/ecdsa"
	ma "github.com/multiformats/go-multiaddr"
	"strings"
)

func convertToLibp2pPrivKey(privateKey crypto.PrivateKey) (crypto2.PrivKey, error) {
	ecdsaPrivKey, ok := privateKey.(*ecdsa.PrivateKey)
	if !ok {
		return nil, fmt.Errorf("convert to libp2p private key: not ecdsa private key")
	}

	libp2pPrivKey, _, err := crypto2.ECDSAKeyPairFromKey(ecdsaPrivKey.K)
	if err != nil {
		return nil, err
	}

	return libp2pPrivKey, nil
}

func loadPeers(peers []string, privateKey crypto2.PrivKey) (string, map[string]*peer.AddrInfo, error) {
	var local string
	remotes := make(map[string]*peer.AddrInfo)

	id, err := peer.IDFromPrivateKey(privateKey)
	if err != nil {
		return "", nil, err
	}

	for _, p := range peers {
		//p: 127.0.0.1:4567/p2p/QmSoLV4Bbm51jM9C4gDYZQ9Cy3U6aXMJDAbzgu2fzaDs64
		if strings.HasSuffix(p, id.String()) {
			idx := strings.LastIndex(p, "/p2p/")
			if idx == -1 {
				return "", nil, fmt.Errorf("pid is not existed in bootstrap")
			}

			local = p[:idx]
		} else {
			addr, err := AddrToPeerInfo(p)
			if err != nil {
				return "", nil, fmt.Errorf("wrong network addr: %w", err)
			}
			remotes[addr.ID.String()] = addr
		}
	}

	if local == "" {
		return "", nil, fmt.Errorf("get local addr: no local addr is configured")
	}

	return local, remotes, nil
}

// AddrToPeerInfo transfer addr to PeerInfo
// addr example: "/ip4/104.236.76.40/tcp/4001/ipfs/QmSoLV4Bbm51jM9C4gDYZQ9Cy3U6aXMJDAbzgu2fzaDs64"
func AddrToPeerInfo(multiAddr string) (*peer.AddrInfo, error) {
	maddr, err := ma.NewMultiaddr(multiAddr)
	if err != nil {
		return nil, err
	}

	return peer.AddrInfoFromP2pAddr(maddr)
}