package routedhost

import (
	
	
	

	
	
	
	
	
	
	

	logging 

	ma 
)

var log = logging.Logger("routedhost")

// AddressTTL is the expiry time for our addresses.
// We expire them quickly.
const AddressTTL = time.Second * 10

// RoutedHost is a p2p Host that includes a routing system.
// This allows the Host to find the addresses for peers when
// it does not have them.
type RoutedHost struct {
	host  host.Host // embedded other host.
	route Routing
}

type Routing interface {
	FindPeer(context.Context, peer.ID) (peer.AddrInfo, error)
}

func ( host.Host,  Routing) *RoutedHost {
	return &RoutedHost{, }
}

// Connect ensures there is a connection between this host and the peer with
// given peer.ID. See (host.Host).Connect for more information.
//
// RoutedHost's Connect differs in that if the host has no addresses for a
// given peer, it will use its routing system to try to find some.
func ( *RoutedHost) ( context.Context,  peer.AddrInfo) error {
	// first, check if we're already connected unless force direct dial.
	,  := network.GetForceDirectDial()
	,  := network.GetAllowLimitedConn()
	if ! {
		 := .Network().Connectedness(.ID)
		if  == network.Connected || ( &&  == network.Limited) {
			return nil
		}
	}

	// if we were given some addresses, keep + use them.
	if len(.Addrs) > 0 {
		.Peerstore().AddAddrs(.ID, .Addrs, peerstore.TempAddrTTL)
	}

	// Check if we have some addresses in our recent memory.
	 := .Peerstore().Addrs(.ID)
	if len() < 1 {
		// no addrs? find some with the routing system.
		var  error
		,  = .findPeerAddrs(, .ID)
		if  != nil {
			return 
		}
	}

	// Issue 448: if our address set includes routed specific relay addrs,
	// we need to make sure the relay's addr itself is in the peerstore or else
	// we won't be able to dial it.
	for ,  := range  {
		if ,  := .ValueForProtocol(ma.P_CIRCUIT);  != nil {
			// not a relay address
			continue
		}

		if .Protocols()[0].Code != ma.P_P2P {
			// not a routed relay specific address
			continue
		}

		,  := .ValueForProtocol(ma.P_P2P)
		,  := peer.Decode()
		if  != nil {
			log.Debugf("failed to parse relay ID in address %s: %s", , )
			continue
		}

		if len(.Peerstore().Addrs()) > 0 {
			// we already have addrs for this relay
			continue
		}

		,  := .findPeerAddrs(, )
		if  != nil {
			log.Debugf("failed to find relay %s: %s", , )
			continue
		}

		.Peerstore().AddAddrs(, , peerstore.TempAddrTTL)
	}

	// if we're here, we got some addrs. let's use our wrapped host to connect.
	.Addrs = 
	if  := .host.Connect(, );  != nil {
		// We couldn't connect. Let's check if we have the most
		// up-to-date addresses for the given peer. If there
		// are addresses we didn't know about previously, we
		// try to connect again.
		,  := .findPeerAddrs(, .ID)
		if  != nil {
			log.Debugf("failed to find more peer addresses %s: %s", .ID, )
			return 
		}

		// Build lookup map
		 := make(map[string]struct{}, len())
		for ,  := range  {
			[string(.Bytes())] = struct{}{}
		}

		// if there's any address that's not in the previous set
		// of addresses, try to connect again. If all addresses
		// where known previously we return the original error.
		for ,  := range  {
			if ,  := [string(.Bytes())];  {
				continue
			}

			.Addrs = 
			return .host.Connect(, )
		}
		// No appropriate new address found.
		// Return the original dial error.
		return 
	}
	return nil
}

func ( *RoutedHost) ( context.Context,  peer.ID) ([]ma.Multiaddr, error) {
	,  := .route.FindPeer(, )
	if  != nil {
		return nil,  // couldnt find any :(
	}

	if .ID !=  {
		 = fmt.Errorf("routing failure: provided addrs for different peer")
		log.Errorw("got wrong peer",
			"error", ,
			"wantedPeer", ,
			"gotPeer", .ID,
		)
		return nil, 
	}

	return .Addrs, nil
}

func ( *RoutedHost) () peer.ID {
	return .host.ID()
}

func ( *RoutedHost) () peerstore.Peerstore {
	return .host.Peerstore()
}

func ( *RoutedHost) () []ma.Multiaddr {
	return .host.Addrs()
}

func ( *RoutedHost) () network.Network {
	return .host.Network()
}

func ( *RoutedHost) () protocol.Switch {
	return .host.Mux()
}

func ( *RoutedHost) () event.Bus {
	return .host.EventBus()
}

func ( *RoutedHost) ( protocol.ID,  network.StreamHandler) {
	.host.SetStreamHandler(, )
}

func ( *RoutedHost) ( protocol.ID,  func(protocol.ID) bool,  network.StreamHandler) {
	.host.SetStreamHandlerMatch(, , )
}

func ( *RoutedHost) ( protocol.ID) {
	.host.RemoveStreamHandler()
}

func ( *RoutedHost) ( context.Context,  peer.ID,  ...protocol.ID) (network.Stream, error) {
	// Ensure we have a connection, with peer addresses resolved by the routing system (#207)
	// It is not sufficient to let the underlying host connect, it will most likely not have
	// any addresses for the peer without any prior connections.
	// If the caller wants to prevent the host from dialing, it should use the NoDial option.
	if ,  := network.GetNoDial(); ! {
		 := .Connect(, peer.AddrInfo{ID: })
		if  != nil {
			return nil, 
		}
	}

	return .host.NewStream(, , ...)
}
func ( *RoutedHost) () error {
	// no need to close IpfsRouting. we dont own it.
	return .host.Close()
}
func ( *RoutedHost) () connmgr.ConnManager {
	return .host.ConnManager()
}

var _ (host.Host) = (*RoutedHost)(nil)