package peer

import (
	"testing"
	"time"
)

func TestStateClient_peerUpdate(t *testing.T) {
	h := NewPeerStateTestHarness()
	h.ConfigClientDirect(t)
	h.PeerUpdate(nil)
	assertType[*stateDisconnected](t, h.State)
}

func TestStateClient_initialPackets(t *testing.T) {
	h := NewPeerStateTestHarness()
	h.ConfigClientDirect(t)

	assertEqual(t, len(h.Sent), 2)
	assertType[packetInit](t, h.Sent[0].Packet)
	assertType[packetSyn](t, h.Sent[1].Packet)
}

func TestStateClient_onAck_incorrectTraceID(t *testing.T) {
	h := NewPeerStateTestHarness()
	h.ConfigClientDirect(t)
	h.Sent = h.Sent[:0]

	ack := controlMsg[packetAck]{
		Packet: packetAck{TraceID: newTraceID()},
	}
	h.OnAck(ack)

	// Nothing should have happened.
	assertType[*stateClient](t, h.State)
	assertEqual(t, len(h.Sent), 0)
}

func TestStateClient_onAck_direct_downToUp(t *testing.T) {
	h := NewPeerStateTestHarness()
	h.ConfigClientDirect(t)

	assertEqual(t, len(h.Sent), 2)
	syn := assertType[packetSyn](t, h.Sent[1].Packet)
	h.Sent = h.Sent[:0]

	assertEqual(t, h.Published.Up, false)

	ack := controlMsg[packetAck]{
		Packet: packetAck{TraceID: syn.TraceID},
	}

	h.OnAck(ack)

	assertEqual(t, len(h.Sent), 0)
}

func TestStateClient_onAck_relayed_sendsProbes(t *testing.T) {
	h := NewPeerStateTestHarness()
	h.ConfigClientRelayed(t)

	assertEqual(t, len(h.Sent), 2)
	syn := assertType[packetSyn](t, h.Sent[1].Packet)
	h.Sent = h.Sent[:0]

	assertEqual(t, h.Published.Up, false)

	ack := controlMsg[packetAck]{
		Packet: packetAck{TraceID: syn.TraceID},
	}
	ack.Packet.PossibleAddrs[0] = addrPort4(1, 2, 3, 4, 100)
	ack.Packet.PossibleAddrs[1] = addrPort4(2, 3, 4, 5, 200)

	h.OnAck(ack)

	assertEqual(t, len(h.Sent), 2)
	assertType[packetProbe](t, h.Sent[0].Packet)
	assertEqual(t, h.Sent[0].Peer.DirectAddr, ack.Packet.PossibleAddrs[0])
	assertType[packetProbe](t, h.Sent[1].Packet)
	assertEqual(t, h.Sent[1].Peer.DirectAddr, ack.Packet.PossibleAddrs[1])
}

func TestStateClient_onPing(t *testing.T) {
	h := NewPeerStateTestHarness()
	h.ConfigClientRelayed(t)
	h.Sent = h.Sent[:0]
	h.OnPingTimer()
	assertEqual(t, len(h.Sent), 1)
	assertType[*stateClient](t, h.State)
	assertType[packetSyn](t, h.Sent[0].Packet)
}

func TestStateClient_onPing_timeout(t *testing.T) {
	h := NewPeerStateTestHarness()
	h.ConfigClientRelayed(t)
	h.Sent = h.Sent[:0]
	state := assertType[*stateClient](t, h.State)
	state.lastSeen = time.Now().Add(-2 * timeoutInterval)
	state.staged.Up = true
	h.OnPingTimer()

	newState := assertType[*stateClientInit](t, h.State)
	assertEqual(t, newState.staged.Up, false)
	assertEqual(t, len(h.Sent), 1)
	assertType[packetInit](t, h.Sent[0].Packet)
}

// probe direct

// probe relayed - no match

// probe relayed - match