package beaconchain

import (
	"fmt"
	"net"
	"os"
	"sync"

	"github.com/dedis/kyber"
	"github.com/harmony-one/harmony/crypto/pki"
	"github.com/harmony-one/harmony/log"
	"github.com/harmony-one/harmony/node"
	"github.com/harmony-one/harmony/p2p"
	proto_identity "github.com/harmony-one/harmony/proto/identity"
)

var mutex sync.Mutex
var identityPerBlock = 100000

// BeaconChain (Blockchain) keeps Identities per epoch, currently centralized!
type BeaconChain struct {
	//Identities            []*IdentityBlock //No need to have the identity block as of now
	Identities           []*node.Node
	log                  log.Logger
	PeerToShardMap       map[*node.Node]int
	ShardLeaderMap       map[int]*node.Node
	PubKey               kyber.Point
	NumberOfShards       int
	NumberOfLeadersAdded int
}

// New return BeaconChain.
func New(filename string) *BeaconChain {
	idc := BeaconChain{}
	//idc.NumberOfShards = readConfigFile(filename)
	idc.log = log.New()
	idc.NumberOfShards = 2
	idc.PubKey = generateIDCKeys()
	return &idc
}

func readConfigFile(filename string) int {
	return 2
}

func generateIDCKeys() kyber.Point {
	priKey := pki.GetPrivateKeyFromInt(10)
	pubkey := pki.GetPublicKeyFromPrivateKey(priKey)
	return pubkey
}

// AcceptConnections welcomes new connections
func (IDC *BeaconChain) AcceptConnections(b []byte) {
	NewNode := node.DeserializeNode(b)
	fmt.Println(NewNode)
}

func (IDC *BeaconChain) registerNode(Node *node.Node) {
	IDC.Identities = append(IDC.Identities, Node)
	fmt.Println(IDC.Identities)
	//IDC.CommunicatePublicKeyToNode(Node.SelfPeer)
	return
}

// CommunicatePublicKeyToNode communicates public key to node.
func (IDC *BeaconChain) CommunicatePublicKeyToNode(peer p2p.Peer) {
	pbkey := pki.GetBytesFromPublicKey(IDC.PubKey)
	msgToSend := proto_identity.ConstructIdentityMessage(proto_identity.Acknowledge, pbkey[:])
	p2p.SendMessage(peer, msgToSend)
}

//StartServer a server and process the request by a handler.
func (IDC *BeaconChain) StartServer() {
	IDC.log.Info("Starting IDC server...") //log.Info does nothing for me! (ak)
	IDC.listenOnPort()
}

func (IDC *BeaconChain) listenOnPort() {
	addr := net.JoinHostPort("127.0.0.1", "8081")
	listen, err := net.Listen("tcp", addr)
	if err != nil {
		IDC.log.Crit("Socket listen port failed")
		os.Exit(1)
	} else {
		IDC.log.Info("Identity chain is now listening ..")
	}
	defer listen.Close()
	for {
		IDC.log.Info("I am accepting connections now")
		conn, err := listen.Accept()
		fmt.Println(conn)
		if err != nil {
			IDC.log.Crit("Error listening on port. Exiting", "8081")
			continue
		} else {
			IDC.log.Info("I am accepting connections now")
		}
		go IDC.BeaconChainHandler(conn)
	}

}